WO2001095958A1 - Puncturer and self-retaining needle assembly - Google Patents

Puncturer and self-retaining needle assembly Download PDF

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Publication number
WO2001095958A1
WO2001095958A1 PCT/JP2001/004942 JP0104942W WO0195958A1 WO 2001095958 A1 WO2001095958 A1 WO 2001095958A1 JP 0104942 W JP0104942 W JP 0104942W WO 0195958 A1 WO0195958 A1 WO 0195958A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
protector
puncture device
hub
tip
Prior art date
Application number
PCT/JP2001/004942
Other languages
French (fr)
Japanese (ja)
Inventor
Masahiro Ishida
Original Assignee
Terumo Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terumo Kabushiki Kaisha filed Critical Terumo Kabushiki Kaisha
Publication of WO2001095958A1 publication Critical patent/WO2001095958A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0618Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard
    • A61M25/0625Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard with a permanent connection to the needle hub, e.g. a guiding rail, a locking mechanism or a guard advancement mechanism
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • A61M2005/325Means obstructing the needle passage at distal end of a needle protection sleeve
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3273Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel freely sliding on needle shaft without connection to syringe or needle

Definitions

  • the present invention relates to a puncture device and an indwelling clear needle assembly. More specifically, for example, the present invention relates to a puncture device used to puncture a blood vessel during transfusion or blood collection, and an indwelling needle assembly provided with the puncture device.
  • an indwelling needle connected to an infusion line is punctured into a patient's blood vessel, and is indwelled.
  • Such an indwelling needle includes a hollow outer needle, an outer needle hub fixed to the proximal end of the outer needle, an inner needle inserted into the outer needle and having a sharp needle tip at the distal end, and an inner needle. And an inner needle hub fixed to a base end of the inner needle hub.
  • the blood flowing from the opening of the needle passes through the inner lumen of the inner needle and flows into the transparent inner needle hub (flashback).
  • flashback This confirms that the inner needle has secured the blood vessel.
  • grasping the outer needle by hand remove the inner tube from the outer needle, and connect the connector of the infusion line to the outer needle hub. And the connected infusion solution Infusion is administered via the in and out needles.
  • the inner needle pulled out from the outer needle becomes unnecessary and is provided for disposal.However, if the inner needle is discarded as it is, the discarding worker etc. accidentally points a finger etc. with the needle tip of the inner needle. May occur. In particular, blood adheres and remains on the surface and inside of the inner needle, and such misstimulation may cause infection.
  • the USP 4994401 patent provides a protector that is movable relative to the inner hub and at least the inner tip can be stored.
  • Indwelling needles have been proposed. Such an indwelling needle is configured such that after removing the inner needle from the outer needle, the inner hub is moved toward the proximal end of the protector, and the inner needle tip is stored in the protector. I have. By installing this protector, it is possible to prevent accidents in which a disposal worker or the like accidentally stabs a finger or the like with a tip inside. ',
  • Such a shirt setting means is composed of a shutter member and a panel member for urging the shutter member.
  • the panel member is in a compressed state before the shutter means is operated, that is, before the indwelling needle is used, and is stored in this state. For this reason, if the indwelling needle is stored for a long period of time, the panel member may be bent and the shutter means may not operate properly when the indwelling needle is discarded after use. This In the case of, there is a risk that the needle tip will protrude from the tip of the protector. Disclosure of the invention
  • a puncture device having a needle body having a needle tip at a distal end, a hub provided at a base end portion of the needle body, and a protector covering the needle tip,
  • a protector body having a body passage through which the body can pass
  • a shutter member displaceable between a first position in which the body can pass through the body passage and a second position in which the body prevents passage of the needle tip;
  • the shutter member includes a first portion, and a second portion present via a connecting portion to the first portion, and an end of the first portion opposite to the connecting portion,
  • a puncture device characterized in that a distance between the end of the second part and the end opposite to the connection part is changed between the first posture and the second posture.
  • the projecting portion curves the first portion and the Z or the second portion. Or the puncture device formed by bending.
  • the shutter member is installed in a space formed in the middle of the needle body passage, and the second portion has an end opposite to the connecting portion when in the first posture.
  • the puncture device according to any one of (1) to (4), which is in contact with the outer peripheral surface of the needle body.
  • the first portion and the second portion are configured such that, in the second posture, ends opposite to the connecting portion abut on the inner surface of the protector main body, respectively.
  • the puncture device according to any one of (1) to (5), which is configured.
  • the end of the first part on the side opposite to the connection part, the end of the second part on the side opposite to the connection part, and the vicinity of the connection part are in the second posture.
  • the second portion has a friction reducing means at an end opposite to the connecting portion to reduce frictional resistance with an outer peripheral surface of the needle body.
  • the friction reducing means includes a bent portion formed by bending an end of the second portion opposite to the connection portion or a chamfered portion formed by chamfering. There are (11) punctures.
  • the protector In a state where the protector covers the needle tip of the needle body, the protector has a detachment preventing means for preventing the protector from detaching from the tip of the body (1) No (16) The puncture device according to any one of the above.
  • the detachment preventing means includes a first engaging portion formed on the needle body, and a second engaging portion formed on the protector and capable of engaging with the first engaging portion.
  • the first engaging portion is configured by a concave portion formed on an outer peripheral portion of the needle body, and the second engaging portion is configured by a convex portion capable of engaging with the concave portion.
  • the needle body has a different cross-sectional shape between the vicinity of the needle tip and a portion closer to the base end than the needle tip, and the first engagement portion has a portion where the cross-sectional shape of the needle body changes.
  • the puncture device according to (18), wherein the second engagement portion is formed of a step portion that can engage with a portion of the needle body where the lateral new surface shape changes.
  • An indwelling needle assembly comprising: an outer needle hub installed at a base end of the outer needle.
  • FIG. 1 is a longitudinal sectional view showing a first embodiment (first posture of one member of a shirt) in which the puncture device of the present invention is applied to an indwelling needle assembly.
  • FIG. 2 is a vertical view showing the first embodiment (second posture of the shirt evening member) when the puncture device of the present invention is applied to an indwelling needle assembly.
  • FIG. 3 is a vertical cross-sectional view showing a configuration (a first posture of a shutter member) of the protector included in the indwelling needle assembly according to the first embodiment.
  • FIG. 4 is a longitudinal cross-sectional view showing a configuration (a second posture of the shirt first member) of the distal end of the protector provided in the indwelling assembly of the first embodiment.
  • FIG. 5 is a longitudinal sectional view showing the configuration (first posture of the shutter member) of the distal end of the protector included in the indwelling needle assembly according to the second embodiment.
  • FIG. 6 is a longitudinal sectional view showing a configuration (a second posture of the shirt evening member) of the distal end of the protector provided in the indwelling needle assembly according to the second embodiment.
  • FIG. 7 is a vertical cross-sectional view showing a configuration (a first posture of a shutter member) on the distal end side of a protector included in the indwelling needle assembly according to the third embodiment.
  • FIG. 8 is a vertical cross-sectional view showing a configuration (a second posture of the shutter member) of the protector included in the indwelling needle assembly according to the third embodiment.
  • FIG. 9 is a longitudinal sectional view showing a configuration (first posture of a shutter member) of a distal end side of a protector included in an indwelling needle assembly according to a fourth embodiment.
  • FIG. 10 is a longitudinal cross-sectional view showing the structure (second posture of the shutter member) on the distal end side of the protector included in the indwelling needle assembly according to the fourth embodiment.
  • FIG. 11 shows a configuration of the distal end side of a protector included in the indwelling needle assembly according to the fifth embodiment.
  • FIG. 3 is a longitudinal sectional view showing a configuration (first posture of a shirt evening member).
  • FIG. 12 is a longitudinal cross-sectional view showing a configuration (a second posture of the shutter member) on the distal end side of a protector included in the indwelling device assembly according to the fifth embodiment.
  • FIG. 13 is an enlarged vertical cross-sectional view showing the configuration near the center of a protector included in the indwelling needle assembly according to the sixth embodiment.
  • FIG. 14 is an enlarged vertical cross-sectional view showing the configuration of the end of the second portion of the shutter member provided in the indwelling needle assembly according to the seventh embodiment.
  • FIG. 15 is an enlarged vertical sectional view showing the configuration of the end of the second portion of the shutter member provided in the indwelling assembly according to the eighth embodiment.
  • FIG. 16 is a longitudinal cross-sectional view showing a configuration (a first posture of a shirt evening member) of a distal end of a protector provided in an indwelling needle assembly according to a ninth embodiment.
  • FIG. 17 is a longitudinal sectional view showing the indwelling needle assembly (first posture of the shutter member) of the tenth embodiment.
  • FIG. 18 is a longitudinal sectional view showing the indwelling assembly (second posture of the shutter member) according to the tenth embodiment.
  • FIG. 19 is a longitudinal sectional view showing the indwelling needle assembly (first posture of the shutter member) of the eleventh embodiment.
  • FIG. 20 is a longitudinal cross-sectional view showing the indwelling needle assembly (second posture of the shutter member) of the first embodiment.
  • FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment in which the puncture device of the present invention is applied to an indwelling needle assembly
  • FIGS. 3 and 4 are respectively indwelling needles of the first embodiment.
  • It is a longitudinal cross-sectional view which shows the structure of the front end side of the protection part with which an assembly is provided.
  • the right side in FIGS. 1 to 4 is referred to as a “proximal end”, and the left side is referred to as a “distal end”.
  • the indwelling needle assembly (puncture needle assembly) 1 shown in FIG. 1 includes an outer needle and an inner needle, and particularly constitutes an indwelling needle assembly for infusion.
  • An inner needle 7 with a hub constituted by an inner needle hub 6 provided at the base end of the inner needle 5 and a protector 8 for covering the needle tip 51 of the inner needle 5 are provided.
  • the inner needle 7 with a hub and the protector 8 constitute the puncture device of the present invention.
  • the configuration of each unit will be described.
  • the outer needle 2 preferably has a hollow shape and has a certain degree of flexibility.
  • the constituent material of the outer needle 2 is not particularly limited, but, for example, various soft resins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyurethane, and polyether nitro resin are preferable.
  • ETFE ethylene-tetrafluoroethylene copolymer
  • polyurethane polyurethane
  • polyether nitro resin are preferable.
  • Such an outer needle 2 may have all or part of its internal visibility. Further, an X-ray contrast agent such as barium sulfate or barium carbonate may be blended in the constituent material of the outer needle 2 to provide a contrast function.
  • an X-ray contrast agent such as barium sulfate or barium carbonate may be blended in the constituent material of the outer needle 2 to provide a contrast function.
  • the distal end of the outer needle 2 has a tapered shape whose outer diameter gradually decreases toward the distal end in order to easily and invasively puncture a living body.
  • An outer needle hub 3 is fixed to the base end of the outer needle 2 in a liquid-tight manner, and the lumen of the outer needle 2 and the inside of the outer needle hub 3 communicate with each other.
  • the outer needle hub 3 is a substantially cylindrical member, and has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. The tapered portion is fitted with a distal end of a protector 8 to be described later.
  • the outer needle 3 is preferably made of a transparent (colorless and transparent) colored transparent or translucent resin, and the internal visibility is secured.
  • the outer needle 2 is fixed to the outer needle 8 by, for example, force crimping, fusion (heat fusion, high-frequency fusion, or the like), bonding with an adhesive, or the like.
  • the inner needle 5 is a hollow needle and is made of, for example, a metal material such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy.
  • a sharp tip 51 is formed at the tip of the inner needle 5.
  • the shape of the needle tip 51 is not particularly limited. In the present embodiment, the needle tip 51 has a shape having a blade surface inclined at a predetermined angle with respect to the axis of the inside 5.
  • the inner needle 5 is inserted into the lumen of the outer sleeve 2, and is used in a state where the protector 8 is fitted to the outer needle hub 3, that is, a state shown in FIG.
  • this state is referred to as “assembled state”.
  • the length of the inner rim 5 is such that at least the needle tip 51 protrudes from the tip end opening 21 of the outer needle 2 when assembled.
  • the proximal end of the inner needle 5 is fixed to the distal end of the inner needle hub 6, and the lumen of the inner needle 5 communicates with the inner space of the inner needle hub 6.
  • the inner wall 6 is composed of a substantially cylindrical hollow member.
  • the fixing method of the inner needle 5 to the inner needle hub 6 is, for example, fitting, force crimping, fusion, bonding.
  • a method of bonding with an agent or a method using these in combination may be used.
  • the inner needle 6 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured. Thereby, when the needle tip 51 secures a blood vessel, the flashback of the blood flowing through the inner needle 5 can be visually confirmed.
  • a flange 61 is formed on the outer periphery of the tip of the inner hub 6. For example, at the time of the operation of extracting the inner needle 5 from the outer needle 2, by hooking a finger on the flange 61 and performing this operation, this operation can be performed more reliably.
  • a ventilation filter 62 is provided at an opening on the base end side of the inner needle hub 6 so as to cover the opening.
  • the ventilation filter 62 has a property of transmitting gas but blocking liquid.
  • the ventilation filter 62 include, for example, various sintered porous bodies, hydrophobic non-woven cloths, and other porous bodies.
  • the sintered porous body a material obtained by sintering a material containing a polymer material (powder) such as polyethylene and a hydrophilic (water-soluble, 7-swellable) polymer is preferable.
  • a material obtained by sintering a material containing a polymer material (powder) such as polyethylene and a hydrophilic (water-soluble, 7-swellable) polymer is preferable.
  • ventilation is blocked by contact with a liquid (blood), so that invasion of air from the outside can be prevented.
  • a concave portion 63 is formed on the distal end surface of the inner needle hub 6.
  • the concave portion 63 has a function as an escape hole into which the locking member 92 is inserted when the distal end surface of the inner needle hub 6 and the proximal end surface of the protector 8 come into contact with each other.
  • the constituent materials of the outer needle hub 3, the inner needle hub 6, and the protector body 81 described later are not particularly limited, and are, for example, polyethylene, polypropylene, and polybutadiene, respectively.
  • Polyolefins such as ethylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyester, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene
  • resin materials such as ren sulfide and polyether ether ketone are exemplified.
  • the protector 8 includes a protector body 81 composed of a substantially cylindrical member, and a shutter member (a shirt means) 85 described later. At the center of the protector body 81, a needle passageway 82 through which the inner wall 5 is formed is formed penetrating from the base end to the distal end of the protector body 81.
  • the cross-sectional shape of the needle passage 82 is circular, and the inner diameter of the needle passage 82 is set equal to or slightly larger than the outer diameter of the inner needle 5.
  • a space 83 in which the diameter of the needle passage 82 is enlarged is formed inside the protector body 81, that is, in the middle of the needle passage 82.
  • a shutter member 85 described later is housed in this space 83.
  • the space 83 may be cylindrical, prismatic, or irregularly shaped, but is preferably a rectangular parallelepiped. The space 83 is large enough to store the shirt member 85 in the first position and to restore the second position sufficiently.
  • the distal end side of the protector body 81 has a shape that can be fitted to the outer needle hub 3. For example, it has a tapered shape whose outer diameter gradually decreases toward the tip.
  • the proximal end of the protector body 81 is exposed from the outer needle hub 3.
  • the exposed portion 8 la has a substantially columnar shape, and is long enough to be gripped by hand. By having the exposed portion 8 1 a, the needle tip 5 of the inner needle 5 extracted from the outer needle 5 One can secure enough space in the protection area.
  • the proximal end of the protector body 81 is configured to abut the distal end of the inner hub 6 so that the inner needle hub 6 can be moved in the proximal direction relative to the protector 8.
  • a fitting portion 84 projecting in a ring shape is formed at the central portion in the longitudinal direction of the protector main body 81 so as to fit with the base end of the outer needle 3.
  • the fitting portion 84 can also be used, for example, for hooking a finger when performing the operation of removing the protector 8 from the outer needle hub 3.
  • the protector body 81 is formed integrally, but is not limited thereto.
  • the protector body 81 may be formed by fixing two members as in a sixth embodiment described later. Good.
  • the shutter member 85 can be stored (installed) inside (in the space 83) with the protector body 81 separated into two members.
  • the shirt evening member 85 has a function of preventing the needle tip 51 of the inner needle 5 located on the base end side from the space 83 from passing toward the tip end.
  • the shirt evening member 85 includes a first portion 86 and a second portion existing through a bent portion (connecting portion) 88 that is bent in a substantially V shape with respect to the first portion 86. 87, and are integrally formed by bending a band-shaped plate member having elasticity (resiliently deformed).
  • This shut-off member 85 has a structure in which the angle between the first portion 86 and the second portion 87 changes, that is, the vicinity of the base end 861 of the first portion 86 (the bent portion 8 8) and the distance between the proximal end 871 of the second portion 87 and the vicinity of the proximal end 871 (end opposite to the bent portion 88) changes the inner needle 5
  • the first position (the position shown in FIGS. 1 and 3), which allows the passage 82 to pass (penetrate), and prevents the inner needle 5 from passing through the needle tip 51
  • To the second posture the posture shown in Figs. 2 and 4).
  • the shirt evening material 85 becomes the first portion 86 and the second portion 8 around the bent portion 88. 7 are stored (installed) in the space 83 in a compressed (bent) state so as to approach each other, and have the first posture (the posture shown in FIGS. 1 and 3).
  • the vicinity of the base end 861 of the first portion 86 (the end opposite to the bent portion 88) is located above the space 83 (near the inner surface of the protection body 81).
  • the vicinity of the base end 871 of the second portion 87 (the end opposite to the bent portion 88) is in contact with the vicinity of the outer peripheral surface of the inner needle 5.
  • the needle tip 51 of the inner needle 5 moves in the proximal direction and passes through the space 83.
  • the compressed state of the shutter member 85 is released, and the first portion 86 and the second portion 87 spread apart from each other around the bent portion 88 by their own elastic force,
  • the proximal end is attached to the top of the space 83 (the inner surface of the protector body 81), while the proximal end is near the bottom of the space 83 (the protector).
  • the inner surface of the evening body 81 and the second posture (the posture shown in FIGS. 2 and 4). In this state, the shirt evening member 85 prevents the tip 51 from moving (passing) in the tip direction.
  • the width of the shutter member 85 (the length in the direction perpendicular to the paper in FIGS. 1 to 4) is set to be larger than the inner diameter of the needle body passage 82. For this reason, even if a force in the distal direction is applied to the proximal end of the inner hub 6, the inner needle 5 moves further from the state where the tip 51 abuts on the proximal end surface of the shutter member 85. Movement in the direction is prevented. In other words, when the inner tip 5 is in a state where the needle tip 51 is in contact with the base end face of the shirt evening member 85, and the shutter member 85 is to be moved in the distal direction, Since the shirt member-85 does not enter the needle body passage 82, further movement in the tip direction is prevented (prevented).
  • the shutter member 85 having such a configuration is excellent in a restoring force from the first posture in the compressed state to the second posture having a substantially original shape. For this reason, since the bending of the shirt evening member 85 is prevented, even when the indwelling needle assembly 1 is stored for a long period of time, the shutter member 85 reliably assumes the second position, and the needle tip 5 A sufficient effect of preventing (preventing) the movement of 1 in the direction of the tip can be exerted.
  • the thickness of the shirt evening member 85 is not particularly limited, but is preferably, for example, about 0.04 to 0.2 mm, more preferably about 0.08 to 0.1 mm. . If the shirt evening member 85 is thinner than the above lower limit, the inner needle 5 moves in the distal direction in the second posture, depending on the magnitude of the force that the inner needle hub 6 receives toward its distal end toward the proximal end. In some cases, the tip 51 may break through the shirt member 85. On the other hand, if the shirt member 85 is thicker than the above upper limit, the shutter member 85 may increase the frictional resistance with the outer peripheral surface of the inner needle 5 in the first posture depending on the constituent material. There is.
  • the constituent material of the shutter member 85 may be any material as long as it can prevent the passage of the tip 51, for example, polyolefin such as polyethylene, polypropylene, polybutene, and ethylene-vinyl acetate copolymer.
  • polyolefin such as polyethylene, polypropylene, polybutene, and ethylene-vinyl acetate copolymer.
  • a lubricant is applied to the surface of the shirt member 85.
  • the frictional resistance (sliding resistance) between the outer peripheral surface of the inner needle 5 and the proximal end 871 of the second portion 87 is reduced, and the inner needle 5 moves in the proximal direction of the protective sheath 8.
  • the lubricant and lubricant for example, silicone, silicone oil, grease, various oils, surfactants and the like can be used.
  • the vicinity of the base end 861 of the first portion 86 is simply in contact with the inner surface of the protector body 81.
  • the present invention is not limited to this.
  • the protector body 81 may be fixed to the protector body 81 by, for example, embedding, fusing, bonding with an adhesive, or the like. It is preferable because it has excellent restoring force to the second posture and the assembling process is simple.
  • Such an indwelling needle assembly 1 prevents the protector 8 from detaching from the inner needle 5 needle tip 51 when the protector 8 stores (covers) the needle tip 51 of the inner needle 5.
  • the device may further include a detachment preventing means (9a, 9b, 9c).
  • a detachment preventing means (9a, 9b, 9c) Hereinafter, the configuration of the separation prevention means 9a will be described.
  • a concave portion (first engaging portion) 91 is formed on the outer peripheral surface at a predetermined length from the tip of the inner needle 5.
  • an elastically deformable locking member (panel panel) 92 is formed so as to protrude.
  • the locking member 92 may be formed of the same material as the protector, but may be fixed, embedded, fused, or adhered to the protector as a separate member. It may be.
  • the locking member 92 has a fixed end at its distal end and a movable end at its proximal end, and is cantilevered by the protector body 81, and the movable end is substantially perpendicular to the inner needle 5. Displaces (deforms) vertically in Figs. 1 and 2.
  • a claw (projection) 93 projecting toward the inner needle 5 is formed as a second locking portion. Therefore, the claw 93 can move in a direction substantially perpendicular to the inner surface 5 (vertical direction in FIGS. 1 and 2).
  • the claw 93 In the assembled state of the indwelling assembly 1, the claw 93 is in contact with the outer peripheral surface of the inner needle 5 by the elastic force of the locking member 92 (see FIG. 1).
  • the protector 8 (protector body 8 1) stores (covers) the needle tip 51 of the inner needle 5
  • the claw 93 is inserted into the recess 91 formed in the inner needle 5, 9 Engage with 1 (see Fig. 2).
  • the protector 8 is prevented from coming off (withdrawing) from the needle tip 51 of the inner needle 5.
  • the recess 91 and the claw 93 constitute the separation prevention means 9a.
  • a plurality of the concave portions 91 may be formed along the longitudinal direction and / or the circumferential direction of the inner needle 5.
  • the concave portion 91 is formed in a part of the outer peripheral direction of the inner needle 5, but is not limited to this, and is formed in a ring shape over the entire outer peripheral surface of the inner needle 5. Alternatively, it may be configured by a groove formed along the longitudinal direction of the outer peripheral surface of the inner needle 5.
  • the inner needle 5 and the outer needle 2 are punctured into the blood vessel (vein or artery) of the patient while grasping the inner needle 6 and the like by hand.
  • step [5] the inner needle 5 moves from the assembled state toward the base end, but until the tip 51 of the inner needle 5 passes through the space 83 inside the protector 8.
  • the shutter member 85 maintains the first posture, and the vicinity of the base end 871 of the second portion 87 comes into contact with the outer peripheral surface of the inner needle 5 (see FIGS. 1 and 3).
  • the protector 8 is prevented from being detached (detached) from the needle tip 51 of the inner needle 5.
  • the inside 7 with the hub is no longer needed and is therefore disposed of.
  • the needle tip 51 is covered with the protector 8, and in particular, the needle tip 51 moves to the tip side beyond the shirt evening member 85, and the tip end of the protector 8
  • the needle tip 51 moves in the proximal direction and the protector 8 does not come off, so that the person who disposes of it accidentally stabs a finger or the like with the needle tip 51. Accidents are prevented.
  • indwelling needle assembly 1 by setting the fitting force (joining force) between the protector 8 and the outer hub 3 smaller than the engaging force between the concave portion 91 and the claw 93, The effect is like 'the effect occurs.
  • the protector 8 is also pulled in the proximal direction together with the inner needle 5, and the protector 8 fitted to the outer needle hub 3 is pulled. Can be withdrawn from the outer needle hub 3.
  • the protector 8 can be detached from the outer needle hap 3, and the operation of covering the needle tip 51 of the inner needle 5 can be performed.
  • the operation can be performed more easily.
  • FIGS. 5 and 6 are longitudinal cross-sectional views each showing a configuration of a distal end side of a protection device provided in the indwelling device assembly according to the second embodiment.
  • the indwelling needle assembly three-dimensional body 1 shown in FIGS. 5 and 6 will be described focusing on the differences from the first embodiment, and the description of the same matters will be omitted.
  • the indwelling needle assembly 1 of the second embodiment is the same as the first embodiment, except that the configuration of the shutter member 85 is different.
  • the first portion 86 has a projecting portion 862 protruding toward the second portion 87 (the other side) in the middle thereof.
  • the protruding portion 862 is formed by bending the first portion 86.
  • the shirt evening member 85 is in a more strongly compressed state in the first posture (the posture shown in FIG. 5). For this reason, The shutter member 85 is more reliably restored to the second posture (the posture shown in FIG. 6).
  • such a protruding portion 862 may be provided on at least one of the first portion 86 and the second portion 87, and the shape of the other is not particularly limited. Further, the projecting portion 862 may be formed by curving the first portion 86 and the second portion 87.
  • FIGS. 7 and 8 are longitudinal cross-sectional views each showing a configuration of the distal end side of a protector provided in the indwelling needle assembly according to the third embodiment.
  • the indwelling needle assembly three-dimensional body 1 shown in FIGS. 7 and 8 will be described focusing on the differences from the first embodiment, and the description of the same matters will be omitted.
  • the indwelling needle assembly 1 of the third embodiment is the same as the first embodiment, except that the configuration of the shutter member 85 is different.
  • the first portion 86 has a protruding portion 862 protruding toward the second portion 87 in the middle thereof.
  • the projecting portion 862 is formed by bending the first portion 86.
  • the shutter member 85 When the inner needle 5 penetrates (penetrates) the needle passageway 82, the shutter member 85 is located near the base end 861 of the first portion 86 and the bent portion 88 near the space 83.
  • the upper part (the inner surface of the protective body 81) and the proximal end 871 of the second part 87 come into contact with the outer peripheral surface of the inner part 5, respectively, and the radius of curvature of the projecting part 862 (The first part 86 approaches the flat plate) in the space 83 (first position). (The state shown in Fig. 7).
  • the needle tip 51 of the inner needle 5 moves in the proximal direction and passes through the space 83.
  • the vicinity of the base end 861 of the first portion 86 and the vicinity of the bent portion 88 are maintained in contact with the upper part of the space 83 (the inner surface of the protector body 81), respectively.
  • the first portion 86 returns to almost its original shape so that the radius of curvature is reduced by its own elastic force.
  • the second portion 87 rotates about the bent portion 88, and the vicinity of the base end 871 abuts against the bottom of the space 83 (the inner surface of the protector body 81).
  • the member 85 is in the second posture (the posture shown in FIG. 8). In this state, the shutter member 85 prevents the needle tip 51 from moving (passing) toward the tip end.
  • the shirt evening member 85 can be more reliably restored to the second posture.
  • FIG. 9 and FIG. 10 are longitudinal cross-sectional views each showing the configuration of the distal end side of the detector included in the indwelling needle assembly of the fourth embodiment.
  • the indwelling needle assembly 1 shown in FIGS. 9 and 10 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
  • the indwelling needle assembly 1 of the fourth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
  • the protrusion portion 862 is stored (installed) in the space 83 with the protruding portion 862 folded in an S-shape. I have.
  • FIGS. 11 and 12 are longitudinal cross-sectional views each showing the configuration of the distal end side of a protection needle provided in the indwelling needle assembly according to the fifth embodiment.
  • the indwelling assembly 1 shown in FIGS. 11 and 12 will be described focusing on the differences from the first and third embodiments, and the description of the same matters will be omitted.
  • the indwelling assembly 1 of the fifth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
  • the shutter member 85 when the shutter member 85 is in the first posture (the posture shown in FIG. 11), the proximal end side of the second portion 87 is curved, and the shutter member 85 is in contact with the outer peripheral surface of the inner needle 5. It is stored (installed) in 8 3.
  • the first member 86 and the second member 87 each have their own characteristics. It returns to its original shape by force, and assumes the second posture (the posture shown in Fig. 12).
  • the shirt material 85 is in the first position (the position shown in FIG. 11) in the first position 86 and the second portion 87.
  • the parts 87 of the second part are each deformed and become in a state of being more strongly compressed. Therefore, the shutter member 85 is more reliably restored to the second position (the position shown in FIG. 12).
  • FIG. 13 is an enlarged vertical cross-sectional view showing the configuration near the center of a protector included in the indwelling needle assembly according to the sixth embodiment.
  • the indwelling needle assembly 1 shown in FIG. 13 will be described focusing on differences from the first and third embodiments, and the description of the same items will be omitted.
  • the indwelling needle assembly 1 of the sixth embodiment is the same as the first embodiment except that the configurations of the protector body 81 and the shirt material 85 are different.
  • the protector body 81 is composed of two members, a main body portion 811 and an exterior portion 812 fixed (for example, fused or bonded) to the outer peripheral portion of the main body portion 811. I have. This is because it may be advantageous to use two members depending on the manufacturing process.
  • the shirt evening member 85 has a bent portion 863 formed by bending a base end (an end opposite to the bent portion 88) of the first portion 86.
  • the top portion 863 a of the bent portion 863 abuts on the inner surface of the exterior portion 812, and the first portion The vicinity of the base 861 of 86 is in contact with the tip of the main body 811. Thereby, the contact area of the shutter member 85 with the inner surface of the protector body 81 is increased. sand That is, the bent portion 863 constitutes a contact area increasing means.
  • the pressing force of the shirt evening member 85 against the protection evening body 81 can be dispersed, and the burden on the protection evening body 81 can be reduced.
  • Such a bent portion 863 has a function of preventing the vicinity of the base end 861 of the first portion 86 from entering the fixed portion between the main body portion 811 and the exterior portion 812. Also have.
  • the configurations of the protector body 81 and the shutter member 85 of the sixth embodiment may be separately combined with other aspects.
  • the durability of the protection body 81 can be improved.
  • FIG. 14 is an enlarged vertical cross-sectional view showing the configuration of the end of the second portion of the shutter member provided in the indwelling needle assembly according to the seventh embodiment.
  • the indwelling needle assembly 1 shown in FIG. 14 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
  • the indwelling needle assembly 1 of the seventh embodiment is the same as the first embodiment, except that the configuration of the shutter member 85 is different.
  • the shutter member 85 is formed by bending the vicinity of the proximal end 871 of the second portion 87 toward the inner needle 5 (toward the center axis direction of the protection body 81) as a friction reducing means. It has a bent portion 872 formed in a big tail shape. As shown in FIG. 14, when the shirt evening member 85 is in the first position, the bent portion 872 abuts on the outer peripheral surface of the inner needle 5 and the frictional resistance against the outer peripheral surface of the inner needle 5 ( Sliding resistance). Thereby, the inner needle 5 can be more smoothly moved in the proximal direction of the protection sheath 8.
  • bent portion 872 may be formed not in the clockwise direction shown in FIG. 14 but in the counterclockwise direction.
  • the bent portion 872 is not limited to the one shown in the drawing as long as it can reduce the frictional resistance (sliding resistance) with the outer peripheral surface of the inner rim 5. Shape, U-shape, etc.
  • FIG. 15 is an enlarged longitudinal sectional view showing the configuration of the end of the second portion of the shirt evening member provided in the indwelling body assembly according to the eighth embodiment.
  • the indwelling needle assembly 1 shown in FIG. 15 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
  • the indwelling needle assembly 1 of the eighth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
  • the shutter member 85 has a chamfered portion 873 formed by chamfering the vicinity of the base end 871 of the second portion 87 as friction reducing means.
  • the chamfered portion 873 comes into contact with the outer peripheral surface of the inner needle 5 and the frictional resistance with the outer peripheral surface of the inner needle 5 is increased. (Sliding resistance) Has been reduced. Accordingly, the inner needle 5 can be more smoothly moved in the proximal direction of the protective sheath 8.
  • the surface of the chamfered portion 873 is preferably subjected to a treatment to make the sliding resistance with the inner surface 5 as smooth as possible.
  • FIG. 16 is a vertical cross-sectional view showing a configuration of a distal end side of a protector included in the indwelling device assembly according to the ninth embodiment.
  • the indwelling needle assembly 1 shown in FIG. 16 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
  • the indwelling assembly 1 according to the ninth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
  • the shirt evening member 85 includes a first portion 86 and a second portion 87 that is present via a curved portion (connecting portion) 88 ′ that curves with respect to the first portion 86. As a whole, it is formed in a substantially U-shape.
  • the shirt evening member 85 can be more reliably restored from the first posture to the second posture.
  • the radius of curvature (average) of the curved portion 88 ' is not particularly limited, but is, for example, preferably 1.0 mm or less, more preferably 0.12 to 0.5 mm. . If the radius of curvature of the curved portion 8 8 ′ is larger than the upper limit, the shirt evening member 85 should be in a sufficiently compressed state in the first position (the position shown in FIG. 16). May not be possible, that is, the amount of deflection may be small. 10th Embodiment>
  • FIG. 17 is a longitudinal sectional view showing the indwelling needle assembly (first posture of the shutter member) of the tenth embodiment.
  • FIG. FIG. 4 is a longitudinal sectional view showing a second posture of five parts.
  • the indwelling needle assembly 1 shown in FIGS. 17 and 18 will be described focusing on differences from the first embodiment, and the description of the same items will be omitted.
  • the indwelling needle assembly 1 of the tenth embodiment is the same as the first embodiment except that the configuration of the detachment preventing means is different.
  • the inner needle 5 has a different cross-sectional shape between the vicinity of the needle tip 51 and a portion closer to the base end side. That is, the inner needle 5 has a different cross-sectional shape between the distal end side and the proximal end side with respect to the changing portion (first engagement portion) 94.
  • the inner wall 5 has a flattened cross-sectional shape at the distal end portion and a substantially circular cross-sectional shape at the proximal end portion from the changed portion 94.
  • the portion on the distal side from the changing portion 94 of the inner portion 5 is referred to as “flat portion 52”
  • the portion on the proximal side from the changing portion 94 of the inner portion 5 is referred to as “non-flat portion 53”.
  • the method of changing the cross-sectional shape of the inner needle 5 may be grinding (cutting), but is preferably performed by plastic working such as bending, pressing, or punching. According to the plastic working, the inner needle 5 can be deformed while the wall thickness of the tube wall of the inner needle 5 (flat portion 52) is kept substantially constant in the circumferential direction. Therefore, the inner needle 5 Is suitably maintained.
  • a tubular body 89 is fixed by, for example, fitting, screwing, force crimping, fusion, bonding with an adhesive, or the like. Wearing (fixed).
  • a step portion (second engagement portion) 95 is formed at the boundary between the body passage 82 and the tubular body 89.
  • the constituent material of the tubular body 89 is not particularly limited, and examples thereof include a resin material, a metal material, a fiber material, a glass material, and a ceramic material.
  • the inner diameter r of the tubular body 89 is set substantially equal to or slightly larger than the outer diameter of the non-flat portion 53 (see FIG. 17).
  • the flat portion 52 has a flat shape as described above. For this reason, if the protector 8 (protector body 8 1) is in a state where the needle tip 51 of the inner needle 5 is stored (covered), and the protector 8 is moved toward the tip of the inner needle 5 in the distal direction. However, the stepped portion 95 engages with the change portion 94, and the change portion 94 cannot pass through the lumen of the tubular body 89 (see FIG. 18). This prevents the protector 8 from coming off (withdrawing) from the needle tip 51 of the inner needle 5.
  • the changing portion 94 and the step portion 95 constitute the separation preventing means 9b.
  • RZr is, for example, about 1.02 to 1.30.
  • the relationship is satisfied, and more preferably, a relationship of about 1.04 to 1.20 is satisfied.
  • the value is less than the lower limit, the function of the separation preventing means 9b may not be sufficiently exhibited depending on the constituent material of the tubular body 89 and the like.
  • the upper limit is exceeded, the outer diameter of the flat portion 52 becomes too large depending on the dimensions of the tubular body 89, and the inner needle 5 punctures the blood vessel. In this case, the burden on the patient may increase.
  • the changing portion 94 and the step portion 95 are formed on the inner needle 5 and the protector 8, respectively, the configuration is simple, there is no increase in the number of parts, and the size and diameter are reduced. I do.
  • tubular body 89 may be formed integrally with the protection body 81.
  • FIG. 19 is a longitudinal sectional view showing the indwelling needle assembly (first attitude of the shutter member) of the eleventh embodiment.
  • FIG. FIG. 4 is a longitudinal sectional view showing a second posture of some materials).
  • the indwelling assembly 1 shown in FIGS. 19 and 20 will be described focusing on differences from the first embodiment, and the description of the same matters will be omitted.
  • the indwelling assembly 1 of the eleventh embodiment is the same as the first embodiment except that the configuration of the separation preventing means is different.
  • a flat lid member 64 is installed so as to close the opening of the concave portion 63, and a storage space 65 for storing a string 96 described later is formed. In the puncture operation, the string 96 does not interfere.
  • the cover member 6 4 has a hole 6 4 1 through which the inner needle 5 is inserted substantially in the center, and a hole 6 4 1 Holes 62 through which a string (a linear or band-shaped connecting member) 96 is inserted are formed through the lid member 64 at positions shifted outward from the lid member 64.
  • the string 96 is fixed (fixed) so that its distal end is embedded in the protector body 8 (protector body 81), but its base end (the end on the inner hub 6 side) is It is not fixed (fixed) to the inner needle hub 6.
  • a locking portion 961 is provided that is locked to the base end side edge of the hub 642 to prevent the string 96 from coming off the inner hub 6.
  • the locking portion 961 is formed by, for example, tying a string 96 or fixing (eg, fusing, bonding, etc.) a massive (eg, spherical) member to the string 96. be able to.
  • the constituent material of the string 96 is not particularly limited, but, for example, resin materials such as polyolefin such as polyethylene, polyvinyl chloride, polyurethane, polyester such as polybutylene terephthalate, fiber materials such as cotton, and various metal materials And the like.
  • resin materials such as polyolefin such as polyethylene, polyvinyl chloride, polyurethane, polyester such as polybutylene terephthalate, fiber materials such as cotton, and various metal materials And the like.
  • Such a string 96 may be formed into a single fiber or an aggregate of fibers (for example, a single fiber broken or a single fiber woven), a nonwoven fabric, or a film made of the above-mentioned materials. Can be used.
  • the string 96 In the assembled state of the indwelling needle assembly 1 (when the protector 8 is brought closer to the inner needle hub 6), the string 96 is folded in a relaxed state, and is stored in the storage space 65 (inner hub 6). It is stored (see Figure 19).
  • Protect evening 8 Protector body 8 1
  • the string 96 In a state where the needle tip 51 of the inner needle 5 is stored (covered), the string 96 is in an extended state.
  • the protector 8 is to be moved in the distal direction with respect to the inner needle 5, the locking portion 961 is locked to the base end side edge of the hole 942 of the lid member 94, and the hole 94 2 (see Figure 20). This prevents the protector 8 from coming off (withdrawing) from the tip 51 of the inner needle 5.
  • Such a string 96 constitutes a separation prevention means 9c.
  • the length of the string 96 is set to such a degree that the slack remains slightly when the protector 8 houses the needle tip 51 of the inner needle 5.
  • the needle 96 can be stored in the protector 8 and the strap 96 can exhibit the effect as a separation preventing means after the shirt evening member 85 is securely in the second posture. That is, the protector 8 can be securely fixed to the tip 51.
  • the storage space 65 may be formed in the protector 8 (protector body 8 1) instead of the inner needle hub 6, or may be formed in both the inner cover 6 and the protector 8.
  • the puncture device and the indwelling needle assembly of the present invention have been described with reference to the illustrated embodiments. However, the present invention is not limited to these embodiments. It can be replaced with any configuration that can exhibit the function. Further, the puncture device and the indwelling needle assembly of the present invention may be a combination of any two or more of the first to eleventh embodiments.
  • the above-described connecting portion integrally forms the plate member with the first portion and the second portion.
  • the first portion and the second portion each formed of a plate member may have the same distal end, such as a screw. , Pins, force crimping, fitting, adhesion, fusion, welding, brazing, or the like, or may be provided by being connected by a spring or the like.
  • the shutter member does not easily bend and has a sufficient restoring force (function) even when stored for a long period of time, so that the shutter member operates reliably. Therefore, the needle tip once stored in the protector is reliably prevented from protruding from the tip of the protector again, and the safety is high in disposal processing.
  • the restoring force can be more reliably improved.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

A puncturer and self-retaining needle assembly adapted to reliably operate a shutter member and provide a high degree of safety in connection with waste disposal or the like. The self-retaining needle assembly (1) comprises a hub-equipped outer needle (4) composed of an outer needle (2), which is a self-retaining needle, and an outer needle hub (3), a hub-equipped inner needle (7) composed of an inner needle (5) used by being inserted in the outer needle (2) and an inner needle hub (6), a protector (8) covering the needle tip (51) of the inner needle (5), and a shutter member (85) installed in the protector (8). The shutter member (85) is integrally formed by bending a strip-like sheet member having elasticity. The shutter member (85) is received in a space (83) in a compressed state, which is a first position. When the needle tip (51) of the inner needle (5) passes through the space (83), the shutter member (85) is released from compression and assumes a second position under its own elastic force, in which position it prevents movement of the needle tip (51) toward the front end.

Description

穿刺具および留置釙組立体 Puncture and indwelling assembly
技術分野 本発明は、 穿刺具および留置明針組立体に関する。 より詳しくは、 例えば、 輸液 や採血の際に血管に穿刺して使用される穿刺具およびこれを備えた留置針組立体 に関する。 TECHNICAL FIELD The present invention relates to a puncture device and an indwelling clear needle assembly. More specifically, for example, the present invention relates to a puncture device used to puncture a blood vessel during transfusion or blood collection, and an indwelling needle assembly provided with the puncture device.
 book
背景技術 患者に対し輸液を行う際などには、 輸液ラインと接続される留置針を患者の血 管に穿刺し、 留置してこれを行なう。 このような留置針は、 中空の外針と、 外針 の基端に固着された外針ハブと、 前記外針内に挿入され、 先端に鋭利な針先を有 する内針と、 内針の基端に固着された内針ハブとで構成されている。 この留置針を患者の血管に穿刺する際には、 内針を外針内に挿入し、 内針の釙 先を外針の先端から突出させた状態で穿刺操作を行なう。 そして、 内針の釙先が 血管内に到達すると、 針先の開口より流入した血液は、 内針の内腔を通り、 透明 な内針ハブの内部に流入する (フラッシュバック) 。 これにより、 内針が血管を 確保したことが確認できる。 このフラッシュバックを確認したら、 内針および外針をわずかに進め、 外針の 先端を血管内に挿入する。 次いで、 外針を手で把持しつつ、 内釙を外針から抜き 取り、 外針ハブに輸液ラインのコネクタを接続する。 そして、 接続された輸液ラ インおよび外針を介して輸液の投与を行なう。 BACKGROUND ART When infusion is performed on a patient, an indwelling needle connected to an infusion line is punctured into a patient's blood vessel, and is indwelled. Such an indwelling needle includes a hollow outer needle, an outer needle hub fixed to the proximal end of the outer needle, an inner needle inserted into the outer needle and having a sharp needle tip at the distal end, and an inner needle. And an inner needle hub fixed to a base end of the inner needle hub. When puncturing the indwelling needle into a blood vessel of a patient, the inner needle is inserted into the outer needle, and the puncture operation is performed with the tip of the inner needle protruding from the tip of the outer needle. When the tip of the inner needle reaches the inside of the blood vessel, the blood flowing from the opening of the needle passes through the inner lumen of the inner needle and flows into the transparent inner needle hub (flashback). This confirms that the inner needle has secured the blood vessel. After confirming this flashback, advance the inner needle and outer needle slightly, and insert the tip of the outer needle into the blood vessel. Next, while grasping the outer needle by hand, remove the inner tube from the outer needle, and connect the connector of the infusion line to the outer needle hub. And the connected infusion solution Infusion is administered via the in and out needles.
ところで、 外針から抜き取られた内針は、 不要となるため、 廃棄に供され るが、 これをそのまま廃棄すると、 廃棄作業者等が誤って内針の針先で指等を指 すという事故が起きるおそれがある。 特に、 内針の表面や内部には、 血液が 付着、 残留しているため、 このような誤剌により、 感染を起こすおそれもあ る。  By the way, the inner needle pulled out from the outer needle becomes unnecessary and is provided for disposal.However, if the inner needle is discarded as it is, the discarding worker etc. accidentally points a finger etc. with the needle tip of the inner needle. May occur. In particular, blood adheres and remains on the surface and inside of the inner needle, and such misstimulation may cause infection.
そこで、 この問題を解決するために、 U S P 4 9 9 4 0 4 1特許には、 内釙ハ ブに対し相対的に移動可能であり、 少なくとも内釙の釙先が収納可能なプロテク タを設けた留置針が提案されている。 このような留置針は、 内針を外針から抜き 取った後、 内釙ハブをプロテク夕の基端方向へ移動させ、 内針の針先をプロテク 夕内に収納するような構成となっている。 このプロテク夕を設置することに より、 廃棄作業者等が誤って内釙の釙先で指等を刺すという事故を防止すること できる。',  Therefore, in order to solve this problem, the USP 4994401 patent provides a protector that is movable relative to the inner hub and at least the inner tip can be stored. Indwelling needles have been proposed. Such an indwelling needle is configured such that after removing the inner needle from the outer needle, the inner hub is moved toward the proximal end of the protector, and the inner needle tip is stored in the protector. I have. By installing this protector, it is possible to prevent accidents in which a disposal worker or the like accidentally stabs a finger or the like with a tip inside. ',
さらに、 このような留置針には、 釙先が一旦プロテク夕内に収納されると、 釙 先に当接し、 針先の先端側への通過を阻止するシャッター手段を備えたものが提 案されている。  Furthermore, such an indwelling needle has been proposed which has a shutter means for abutting against the tip once the tip is stored in the protector and preventing passage of the needle tip to the tip side. ing.
このようなシャツ夕一手段は、 シャッター部材と、 このシャッター部材を付勢 するパネ部材とで構成されている。  Such a shirt setting means is composed of a shutter member and a panel member for urging the shutter member.
ところが、 このような留置針では、 シャッター手段の作動前、 すなわち、 留置 針の使用前において、 パネ部材は圧縮状態とされ、 この状態で保管されている。 このため、 留置針を長期間保管していた場合、 パネ部材に曲がりグセが付き、 留 置針の使用後、 廃棄に際し、 シャッター手段が上手く作動しないことがある。 こ の場合には、 針先がプロテク夕の先端から飛び出すおそれがある。 発明の開示 However, in such an indwelling needle, the panel member is in a compressed state before the shutter means is operated, that is, before the indwelling needle is used, and is stored in this state. For this reason, if the indwelling needle is stored for a long period of time, the panel member may be bent and the shutter means may not operate properly when the indwelling needle is discarded after use. This In the case of, there is a risk that the needle tip will protrude from the tip of the protector. Disclosure of the invention
本発明の目的は、 シャツ夕一部材が確実に作動し、 廃棄処理等に際し安全性の 高い穿刺具および留置針組立体を提供することにある。  It is an object of the present invention to provide a puncture device and an indwelling needle assembly that can be operated reliably by a shirt and a member, and that are highly safe in disposal and the like.
このような目的は、 下記 (1 ) 〜 (2 7 ) の本発明により達成される。  Such an object is achieved by the present invention described in the following (1) to (27).
( 1 ) 先端に針先を有する針体と、 前記針体の基端部に設けられたハブと、 前 記針先を覆うプロテク夕とを有する穿刺具であって、  (1) A puncture device having a needle body having a needle tip at a distal end, a hub provided at a base end portion of the needle body, and a protector covering the needle tip,
前記プロテクタは、 前記釙体を揷通可能な釙体通路を有するプロテク夕本 体と、  A protector body having a body passage through which the body can pass;
前記釙体が前記釙体通路に揷通可能な第 1の姿勢と前記釙体の針先の通過を阻 止する第 2の姿勢とに変位可能なシャッター部材とを有し、  A shutter member displaceable between a first position in which the body can pass through the body passage and a second position in which the body prevents passage of the needle tip;
前記シャッター部材は、 第 1の部位と、 前記第 1の部位に対し連結部を介して 存在する第 2の部位とを備え、 前記第 1の部位の前記連結部と反対側の端部と、 前記第 2の部位の前記連結部と反対側の端部との距離が、 前記第 1の姿勢と前記 第 2の姿勢とで変化するように構成されていることを特徴とする穿刺具。  The shutter member includes a first portion, and a second portion present via a connecting portion to the first portion, and an end of the first portion opposite to the connecting portion, A puncture device characterized in that a distance between the end of the second part and the end opposite to the connection part is changed between the first posture and the second posture.
( 2 ) 前記シャッター部材は、 前記第 1の部位および Zまたは前記第 2の部位 の少なくとも一部が弹性的に変形することにより、 前記距離が変化するよう構成 されている (1 ) の穿刺具。  (2) The puncture device according to (1), wherein the shutter member is configured such that the distance changes when at least a part of the first part and the Z or the second part is sexually deformed. .
( 3 ) 前記第 1の部位または前記第 2の部位の少なくとも一方は、 他方に 向かって突出する突出部を有する (1 ) または (2 ) の穿刺具。  (3) The puncture device according to (1) or (2), wherein at least one of the first part and the second part has a protruding part protruding toward the other.
( 4 ) 前記突出部は、 前記第 1の部位および Zまたは前記第 2の部位を湾曲ま たは屈曲させることにより形成したものである (3) の穿刺具。 (4) The projecting portion curves the first portion and the Z or the second portion. Or the puncture device formed by bending.
(5) 前記シャッター部材は、 前記針体通路の途中に形成された空間内に設置 され、 前記第 2の部位は、 前記第 1の姿勢のときに、 前記連結部と反対側の端部 が前記針体の外周面に当接している (1) ないし (4) のいずれかに記載の穿刺 具。  (5) The shutter member is installed in a space formed in the middle of the needle body passage, and the second portion has an end opposite to the connecting portion when in the first posture. The puncture device according to any one of (1) to (4), which is in contact with the outer peripheral surface of the needle body.
(6) 前記第 1の部位および前記第 2の部位は、 前記第 2の姿勢のときに、 前 記連結部と反対側の端部が、 それぞれ、 前記プロテク夕本体の内面に当接するよ う構成されている (1) ないし (5) のいずれかに記載の穿刺具。  (6) The first portion and the second portion are configured such that, in the second posture, ends opposite to the connecting portion abut on the inner surface of the protector main body, respectively. The puncture device according to any one of (1) to (5), which is configured.
(7) 前記第 1の部位の前記連結部と反対側の端部、 前記第 2の部位の前記連 結部と反対側の端部および前記連結部付近は、 前記第 2の姿勢のときに、 それぞ れ、 前記プロテク夕本体の内面に当接するよう構成されている (1) ないし (5) のいずれかに記載の穿刺具。  (7) The end of the first part on the side opposite to the connection part, the end of the second part on the side opposite to the connection part, and the vicinity of the connection part are in the second posture. The puncture device according to any one of (1) to (5), wherein the puncture device is configured to be in contact with an inner surface of the protector body.
(8) 前記第 1の部位は、 前記連結部と反対側の端部に、 前記プロテク夕本体 の内面との接触面積を増大する接触面積増大手段を有する (6) または (7) の 穿剌具。  (8) The stimulus according to (6) or (7), wherein the first portion has, at an end opposite to the connecting portion, a contact area increasing means for increasing a contact area with an inner surface of the protection body. Utensils.
(9) 前記接触面積増大手段は、 前記第 1の部位の前記連結部と反対側の端部 を、 折り曲げることにより形成された折り曲げ部で構成されている (8) の穿刺 具。  (9) The puncture device according to (8), wherein the contact area increasing means includes a bent portion formed by bending an end of the first portion opposite to the connection portion.
(10) 前記第 1の部位は、 前記連結部と反対側の端部が前記プロテク夕本体 に固定されている (1) ないし (5) のいずれかに記載の穿刺具。  (10) The puncture device according to any one of (1) to (5), wherein the first portion has an end opposite to the connecting portion fixed to the protector body.
(11) 前記第 2の部位は、 前記連結部と反対側の端部に、 前記針体の外周面 との摩擦抵抗を低減する摩擦低減手段を有する (1) ないし (10) のいずれか に記載の穿刺具。 (11) The second portion has a friction reducing means at an end opposite to the connecting portion to reduce frictional resistance with an outer peripheral surface of the needle body. (1) to (10) The puncture device according to 1.
(12) 前記摩擦低減手段は、 前記第 2の部位の前記連結部と反対側の端 部を、 折り曲げることにより形成された折り曲げ部または面取り加工することに より形成された面取り部で構成されている (11) の穿刺具。  (12) The friction reducing means includes a bent portion formed by bending an end of the second portion opposite to the connection portion or a chamfered portion formed by chamfering. There are (11) punctures.
(13) 前記連結部は、 V字状に屈曲する屈曲部で構成されている (1) ない し (12) のいずれかに記載の穿刺具。  (13) The puncture device according to any one of (1) to (12), wherein the connecting portion is configured by a bent portion bent in a V shape.
(1 ) 前記連結部は、 湾曲する湾曲部で構成され、 その曲率半径 (平均) が 1. 0mm以下である (1) ないし (12) のいずれかに記載の穿刺具。  (1) The puncture device according to any one of (1) to (12), wherein the connecting portion is formed by a curved portion having a curvature radius (average) of 1.0 mm or less.
(15) 前記シャッター部材は、 帯状の板部材で構成され、 その厚さが 0. 04〜0. 2 mmである (1) ないし (14) のいずれかに記載の穿刺 具。  (15) The puncture device according to any one of (1) to (14), wherein the shutter member is formed of a band-shaped plate member, and has a thickness of 0.04 to 0.2 mm.
(16) 前記シャッター部材は、 その表面に潤滑剤が付与されている (1) な いし (15) のいずれかに記載の穿刺具。  (16) The puncture device according to any one of (1) to (15), wherein the shutter member has a surface provided with a lubricant.
(17) 前記プロテク夕が前記針体の針先を覆った状態で、 前記プロテク夕が 前記釙体の前記釙先から離脱するのを阻止する離脱阻止手段を有する (1) ない し (16) のいずれかに記載の穿刺具。  (17) In a state where the protector covers the needle tip of the needle body, the protector has a detachment preventing means for preventing the protector from detaching from the tip of the body (1) No (16) The puncture device according to any one of the above.
(18) 前記離脱阻止手段は、 前記針体に形成された第 1の係合部と、 前記プ ロテク夕に形成され、 前記第 1の係合部に係合し得る第 2の係合部とで構成され る (17) の穿刺具。  (18) The detachment preventing means includes a first engaging portion formed on the needle body, and a second engaging portion formed on the protector and capable of engaging with the first engaging portion. The puncture device according to (17), comprising:
(19) 前記第 1の係合部は、 前記針体の外周部に形成された凹部で構成 され、 前記第 2の係合部は、 前記凹部に係合し得る凸部で構成される (18) の 穿刺具。 (2'ひ) 前記針体は、 前記針先付近とそれより基端側の部分との横断面形状が 異なり、 前記第 1の係合部は、 前記針体の横断面形状が変化する部分で構成 され、 前記第 2の係合部は、 前記針体の横新面形状が変化する部分に係合し得る 段差部で構成される (18) の穿刺具。 (19) The first engaging portion is configured by a concave portion formed on an outer peripheral portion of the needle body, and the second engaging portion is configured by a convex portion capable of engaging with the concave portion. 18) puncture device. (2 ′) The needle body has a different cross-sectional shape between the vicinity of the needle tip and a portion closer to the base end than the needle tip, and the first engagement portion has a portion where the cross-sectional shape of the needle body changes. (18) The puncture device according to (18), wherein the second engagement portion is formed of a step portion that can engage with a portion of the needle body where the lateral new surface shape changes.
(21) 前記離脱阻止手段は、 前記八ブと前記プロテクタとを連結する線状ま たは帯状をなす連結部材で構成される (17) の穿刺具。  (21) The puncture device according to (17), wherein the detachment preventing means is constituted by a linear or band-like connecting member for connecting the eight hooks and the protector.
(22) 前記プロテク夕を前記ハブに接近させたとき、 弛緩した状態の前記連 結部材を収納する収納空間を有する (21) の穿刺具。  (22) The puncture device according to (21), further comprising a storage space for storing the connecting member in a relaxed state when the protector approaches the hub.
(23) 前記収納空間は、 前記ハブに形成されている (22) の穿刺具。 (24) 前記連結部材は、 そのハブ側の端部が前記ハブに固定されておらず、 前記連結部材のハブ側の端部には、 前記八ブに係止して、 前記連結部材が前記八 ブから外れるのを防止する係止部が設けられている (22) または (23) の穿 刺具。  (23) The puncture device according to (22), wherein the storage space is formed in the hub. (24) The end of the connecting member on the hub side is not fixed to the hub, and the end of the connecting member on the hub side is engaged with the tab, and the connecting member is The puncture device of (22) or (23), which is provided with a locking part for preventing the puncture from coming off.
(25) 前記針体は、 管状の内針であり、 前記ハブは、 内針ハブである (1) ないし (24) のいずれかに記載の穿刺具。  (25) The puncture device according to any one of (1) to (24), wherein the needle body is a tubular inner needle, and the hub is an inner needle hub.
(26) (25) の穿刺具と、  (26) The puncture device of (25),
前記内針が挿入可能な中空の外針と、  A hollow outer needle into which the inner needle can be inserted,
前記外針の基端に設置された外針ハブとを有することを特徴とする留置針組立 体。  An indwelling needle assembly comprising: an outer needle hub installed at a base end of the outer needle.
(27) 前記プロテク夕と前記外釙八ブとが嵌合可能な (26) の留置針組立 体。 図面の簡単な説明 (27) The indwelling needle assembly according to (26), wherein the protector and the outer sleeve can be fitted. BRIEF DESCRIPTION OF THE FIGURES
図 1は、 本発明の穿刺具を留置針組立体に適用した場合の第 1実施形態 (シャツタ一部材の第 1の姿勢) を示す縦断面図である。  FIG. 1 is a longitudinal sectional view showing a first embodiment (first posture of one member of a shirt) in which the puncture device of the present invention is applied to an indwelling needle assembly.
図 2は、 本発明の穿刺具を留置針組立体に適用した場合の第 1実施形態 (シャツ夕一部材の第 2の姿勢) を示す縦靳面図である。  FIG. 2 is a vertical view showing the first embodiment (second posture of the shirt evening member) when the puncture device of the present invention is applied to an indwelling needle assembly.
図 3は、 第 1実施形態の留置針組立体が備えるプロテクタの先端側の構成 (シャッター部材の第 1の姿勢) を示す縦断面図である。  FIG. 3 is a vertical cross-sectional view showing a configuration (a first posture of a shutter member) of the protector included in the indwelling needle assembly according to the first embodiment.
図 4は、 第 1実施形態の留置釙組立体が備えるプロテク夕の先端側の構成 (シャツ夕一部材の第 2の姿勢) を示す縦断面図である。  FIG. 4 is a longitudinal cross-sectional view showing a configuration (a second posture of the shirt first member) of the distal end of the protector provided in the indwelling assembly of the first embodiment.
図 5は、 第 2実施形態の留置針組立体が備えるプロテク夕の先端側の構成 (シャッター部材の第 1の姿勢) を示す縦断面図である。  FIG. 5 is a longitudinal sectional view showing the configuration (first posture of the shutter member) of the distal end of the protector included in the indwelling needle assembly according to the second embodiment.
図 6は、 第 2実施形態の留置針組立体が備えるプロテク夕の先端側の構成 (シャツ夕一部材の第 2の姿勢) を示す縦断面図である。  FIG. 6 is a longitudinal sectional view showing a configuration (a second posture of the shirt evening member) of the distal end of the protector provided in the indwelling needle assembly according to the second embodiment.
図 7は、 第 3実施形態の留置針組立体が備えるプロテク夕の先端側の構成 (シャッター部材の第 1の姿勢) を示す縦断面図である。  FIG. 7 is a vertical cross-sectional view showing a configuration (a first posture of a shutter member) on the distal end side of a protector included in the indwelling needle assembly according to the third embodiment.
図 8は、 第 3実施形態の留置針組立体が備えるプロテクタの先端側の構成 (シャッター部材の第 2の姿勢) を示す縦断面図である。  FIG. 8 is a vertical cross-sectional view showing a configuration (a second posture of the shutter member) of the protector included in the indwelling needle assembly according to the third embodiment.
図 9は、 第 4実施形態の留置針組立体が備えるプロテク夕の先端側の構成 (シャッター部材の第 1の姿勢) を示す縦断面図であ ¾。  FIG. 9 is a longitudinal sectional view showing a configuration (first posture of a shutter member) of a distal end side of a protector included in an indwelling needle assembly according to a fourth embodiment.
図 1 0は、 第 4実施形態の留置針組立体が備えるプロテク夕の先端側の構 (シャッター部材の第 2の姿勢) を示す縦断面図である。  FIG. 10 is a longitudinal cross-sectional view showing the structure (second posture of the shutter member) on the distal end side of the protector included in the indwelling needle assembly according to the fourth embodiment.
図 1 1は、 第 5実施形態の留置針組立体が備えるプロテク夕の先端側の構 成 (シャツ夕一部材の第 1の姿勢) を示す縦断面図である。 FIG. 11 shows a configuration of the distal end side of a protector included in the indwelling needle assembly according to the fifth embodiment. FIG. 3 is a longitudinal sectional view showing a configuration (first posture of a shirt evening member).
図 1 2は、 第 5実施形態の留置釙組立体が備えるプロテク夕の先端側の構 成 (シャッター部材の第 2の姿勢) を示す縦断面図である。  FIG. 12 is a longitudinal cross-sectional view showing a configuration (a second posture of the shutter member) on the distal end side of a protector included in the indwelling device assembly according to the fifth embodiment.
図 1 3は、 第 6実施形態の留置針組立体が備えるプロテク夕の中央部付近の構 成を示す拡大縦断面図である。  FIG. 13 is an enlarged vertical cross-sectional view showing the configuration near the center of a protector included in the indwelling needle assembly according to the sixth embodiment.
図 1 4は、 第 7実施形態の留置針組立体が備えるシャッ夕一部材の第 2の部位 の端部の構成を示す拡大縦断面図である。  FIG. 14 is an enlarged vertical cross-sectional view showing the configuration of the end of the second portion of the shutter member provided in the indwelling needle assembly according to the seventh embodiment.
図 1 5は、 第 8実施形態の留置釙組立体が備えるシャッター部材の第 2の部位 の端部の構成を示す拡大縦断面図である。  FIG. 15 is an enlarged vertical sectional view showing the configuration of the end of the second portion of the shutter member provided in the indwelling assembly according to the eighth embodiment.
図 1 6は、 第 9実施形態の留置針組立体が備えるプロテク夕の先端側の構 成 (シャツ夕一部材の第 1の姿勢) を示す縦断面図である。  FIG. 16 is a longitudinal cross-sectional view showing a configuration (a first posture of a shirt evening member) of a distal end of a protector provided in an indwelling needle assembly according to a ninth embodiment.
図 1 7は、 第 1 0実施形態の留置針組立体 (シャッター部材の第 1の姿勢) を 示す縦断面図である。  FIG. 17 is a longitudinal sectional view showing the indwelling needle assembly (first posture of the shutter member) of the tenth embodiment.
図 1 8は、 第 1 0実施形態の留置釙組立体 (シャッター部材の第 2の姿勢) を 示す縦断面図である。  FIG. 18 is a longitudinal sectional view showing the indwelling assembly (second posture of the shutter member) according to the tenth embodiment.
図 1 9は、 第 1 1実施形態の留置針組立体 (シャッター部材の第 1の姿勢) を 示す縦断面図である。  FIG. 19 is a longitudinal sectional view showing the indwelling needle assembly (first posture of the shutter member) of the eleventh embodiment.
図 2 0は、 第 1 1実施形態の留置針組立体 (シャッ夕一部材の第 2の姿勢) を 示す縦断面図である。 発明を実施するための最良の形態 '  FIG. 20 is a longitudinal cross-sectional view showing the indwelling needle assembly (second posture of the shutter member) of the first embodiment. BEST MODE FOR CARRYING OUT THE INVENTION ''
以下、 本発明の穿刺具および留置釙組立体を添付図面に示す好適な実施形態に 基づいて詳細に説明する。 Hereinafter, a puncture device and an indwelling device assembly of the present invention will be described in a preferred embodiment shown in the accompanying drawings. A detailed description will be given based on this.
く第 1実施形態 >  First Embodiment>
図 1および図 2は、 それぞれ、 本発明の穿刺具を留置針組立体に適用した場合 の第 1実施形態を示す縦断面図、 図 3および図 4は、 それぞれ、 第 1実施形態の 留置針組立体が備えるプロテク夕の先端側の構成を示す縦断面図である。 なお、 以下の説明では、 図 1〜図 4中の右側を 「基端」 、 左側を 「先端」 と言う。 図 1に示す留置針組立体 (穿刺釙組立体) 1は、 外針と内針とを備えるも ので、 特に、 輸液用の留置針組立体を構成するものであり、 留置釙である外針 2 と、 外針 2の基端部に設けられた外針ハブ 3とで構成されたハブ付き外針 4と、 外釙 2内に挿入して使用される内針 (釙体) 5と、 内針 5の基端部に設けられた 内針ハブ 6とで構成されたハブ付き内釙 7と、 内針 5の針先 5 1を覆うプロテク 夕 8とを備えている。 このうち、 ハブ付き内針 7とプロテク夕 8とで、 本発明の 穿刺具を構成している。 以下、 各部の構成について説明する。  FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment in which the puncture device of the present invention is applied to an indwelling needle assembly, and FIGS. 3 and 4 are respectively indwelling needles of the first embodiment. It is a longitudinal cross-sectional view which shows the structure of the front end side of the protection part with which an assembly is provided. In the following description, the right side in FIGS. 1 to 4 is referred to as a “proximal end”, and the left side is referred to as a “distal end”. The indwelling needle assembly (puncture needle assembly) 1 shown in FIG. 1 includes an outer needle and an inner needle, and particularly constitutes an indwelling needle assembly for infusion. 2, an outer needle 4 with a hub constituted by an outer needle hub 3 provided at the base end of the outer needle 2, an inner needle (釙 body) 5 used by being inserted into the outer ring 2, and An inner needle 7 with a hub constituted by an inner needle hub 6 provided at the base end of the inner needle 5 and a protector 8 for covering the needle tip 51 of the inner needle 5 are provided. Of these, the inner needle 7 with a hub and the protector 8 constitute the puncture device of the present invention. Hereinafter, the configuration of each unit will be described.
外針 2は、 中空状をなし、 ある程度の可撓性を有するものが好ましく用いられ る。 外針 2の構成材料としては、 特に限定されないが、 例えば、 エチレンーテト ラフルォロエチレン共重合体 (E T F E) 、 ポリウレタン、 ポリエーテルナイ口 ン樹脂等の各種軟質樹脂が好ましい。  The outer needle 2 preferably has a hollow shape and has a certain degree of flexibility. The constituent material of the outer needle 2 is not particularly limited, but, for example, various soft resins such as ethylene-tetrafluoroethylene copolymer (ETFE), polyurethane, and polyether nitro resin are preferable.
このような外針 2は、 その全部または一部が内部の視認性を有していても よい。 また、 外針 2の構成材料中に、 例えば硫酸バリウム、 炭酸バリウムのよう な X線造影剤を配合し、 造影機能を持たせることもできる。  Such an outer needle 2 may have all or part of its internal visibility. Further, an X-ray contrast agent such as barium sulfate or barium carbonate may be blended in the constituent material of the outer needle 2 to provide a contrast function.
外針 2の先端部は、 生体への穿刺を容易かつ低侵襲で行うために、 外径が先端 方向に向かって漸減するテーパ状をなしている。 外針 2の基端部には、 外針ハブ 3が液密に固着され、 外針 2の内腔と外針ハブ 3の内部とが連通している。 外針ハブ 3は、 ほぼ筒状の部材であり、 基端方向に 向かってその外径および内径が漸増するテーパ状をなしている。 このテーパ状部 分は、 後述するプロテク夕 8の先端部と嵌合する。 The distal end of the outer needle 2 has a tapered shape whose outer diameter gradually decreases toward the distal end in order to easily and invasively puncture a living body. An outer needle hub 3 is fixed to the base end of the outer needle 2 in a liquid-tight manner, and the lumen of the outer needle 2 and the inside of the outer needle hub 3 communicate with each other. The outer needle hub 3 is a substantially cylindrical member, and has a tapered shape whose outer diameter and inner diameter gradually increase toward the base end. The tapered portion is fitted with a distal end of a protector 8 to be described later.
この外針八ブ 3は、 好ましくは透明 (無色透明) 着色透明または半透明の樹 脂で構成され、 内部の視認性が確保されている。  The outer needle 3 is preferably made of a transparent (colorless and transparent) colored transparent or translucent resin, and the internal visibility is secured.
外針 2は、 外針八ブ 3に対し、 例えば、 力シメ、 融着 (熱融着、 高周波融 着等) 、 接着剤による接着等の方法により、 固定されている。  The outer needle 2 is fixed to the outer needle 8 by, for example, force crimping, fusion (heat fusion, high-frequency fusion, or the like), bonding with an adhesive, or the like.
内針 5は、 中空針であり、 例えば、 ステンレス鋼、 アルミニウムまたはアルミ ニゥム合金、 チタンまたはチタン合金のような金属材料で構成されている。 内針 5の先端部には、 鋭利な釙先 5 1が形成されている。 この針先 5 1の形状は特に 限定されず、 本実施形態では、 内釙 5の軸線に対し所定角度傾斜した刃面を有す る形状をなしている。  The inner needle 5 is a hollow needle and is made of, for example, a metal material such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy. A sharp tip 51 is formed at the tip of the inner needle 5. The shape of the needle tip 51 is not particularly limited. In the present embodiment, the needle tip 51 has a shape having a blade surface inclined at a predetermined angle with respect to the axis of the inside 5.
この内針 5は、 外釙 2の内腔に揷入され、 さらに、 プロテク夕 8を外針ハブ 3 に嵌合させた状態、 すなわち図 1に示す状態で使用される。 以下、 この状態 を 「組み立て状態」 と言う。  The inner needle 5 is inserted into the lumen of the outer sleeve 2, and is used in a state where the protector 8 is fitted to the outer needle hub 3, that is, a state shown in FIG. Hereinafter, this state is referred to as “assembled state”.
内釙 5の長さは、 組み立て状態としたとき、 少なくとも針先 5 1が外針 2の先 端開口 2 1から突出する程度の長さとされる。  The length of the inner rim 5 is such that at least the needle tip 51 protrudes from the tip end opening 21 of the outer needle 2 when assembled.
内釙 5の基端部は、 内針ハブ 6の先端部と固着され、 内針 5の内腔は、 内針ハ ブ 6の内部空間と連通している。 内釙八ブ 6は、 ほぼ円筒状の中空部材で構成さ れている。  The proximal end of the inner needle 5 is fixed to the distal end of the inner needle hub 6, and the lumen of the inner needle 5 communicates with the inner space of the inner needle hub 6. The inner wall 6 is composed of a substantially cylindrical hollow member.
内針 5の内針ハブ 6に対する固定方法は、 例えば、 嵌合、 力シメ、 融着、 接着 剤による接着等の方法、 あるいはこれらを併用した方法が挙げられる。 The fixing method of the inner needle 5 to the inner needle hub 6 is, for example, fitting, force crimping, fusion, bonding. For example, a method of bonding with an agent or a method using these in combination may be used.
この内針八ブ 6は、 好ましくは透明 (無色透明) 、 着色透明または半透明の樹 脂で構成され、 内部の視認性が確保されている。 これにより、 針先 5 1が血管を 確保した際、 内針 5を介して流入する血液のフラッシュバックを目視で確認する ことができる。  The inner needle 6 is preferably made of a transparent (colorless and transparent), colored transparent or translucent resin, and the internal visibility is secured. Thereby, when the needle tip 51 secures a blood vessel, the flashback of the blood flowing through the inner needle 5 can be visually confirmed.
内釙ハブ 6の先端外周には、 フランジ 6 1が形成されている。 例えば、 外針 2 から内釙 5を抜き取る操作の際に、 フランジ 6 1に指を引っ掛けてこの操作を行 うことにより、 この操作をより確実に行なうことができる。  A flange 61 is formed on the outer periphery of the tip of the inner hub 6. For example, at the time of the operation of extracting the inner needle 5 from the outer needle 2, by hooking a finger on the flange 61 and performing this operation, this operation can be performed more reliably.
また、 内針ハブ 6の基端側の開口には、 該開口を覆うように、 通気フィル夕 6 2が設置されている。 この通気フィルタ 6 2は、 気体は透過するが液体は遮断す る性質を有するものである。  In addition, a ventilation filter 62 is provided at an opening on the base end side of the inner needle hub 6 so as to cover the opening. The ventilation filter 62 has a property of transmitting gas but blocking liquid.
通気フィルタ 6 2の具体例としては、 例えば、 各種焼結多孔体、 疎水性不 織布、 その他の多孔質体が挙げられる。 この場合、 焼結多孔体としては、 例えば ポリエチレン等の高分子材料 (粉末) と、 親水性 (水溶性、 7膨潤性) ポリマ一 とを含む材料を焼結したものが好ましい。 この焼結多孔体を用いると、 液体 (血 液) との接触により通気も遮断されるので、 外部からの空気の侵入を防止するこ とができる。  Specific examples of the ventilation filter 62 include, for example, various sintered porous bodies, hydrophobic non-woven cloths, and other porous bodies. In this case, as the sintered porous body, a material obtained by sintering a material containing a polymer material (powder) such as polyethylene and a hydrophilic (water-soluble, 7-swellable) polymer is preferable. When this sintered porous body is used, ventilation is blocked by contact with a liquid (blood), so that invasion of air from the outside can be prevented.
また、 内針ハブ 6の先端面には、 凹部 6 3が形成されている。 この凹部 6 3は、 内針ハブ 6の先端面と、 プロテク夕 8の基端面とが当接した際、 係止部 材 9 2が揷入される逃げ穴としての機能を有している。  In addition, a concave portion 63 is formed on the distal end surface of the inner needle hub 6. The concave portion 63 has a function as an escape hole into which the locking member 92 is inserted when the distal end surface of the inner needle hub 6 and the proximal end surface of the protector 8 come into contact with each other.
外針ハブ 3、 内針ハブ 6および後述するプロテク夕本体 8 1の構成材料は、 特 に限定されず、 それぞれ、 例えば、 ポリエチレン、 ポリプロピレン、 ポリブタジ ェン、 エチレン—酢酸ビニル共重合体等のポリオレフイン、 ポリ塩化ビニル、 ポ リウレタン、 ポリスチレン、 ポリメチルメタクリレート、 ポリカーボネート、 ポ エステル、 アクリル系樹脂、 A B S樹脂、 A S樹脂、 アイオノマ一、 ポリア セタール、 ポリフエ二レンサルファイド、 ポリエーテルエーテルケトン等の各種 樹脂材料が挙げられる。 The constituent materials of the outer needle hub 3, the inner needle hub 6, and the protector body 81 described later are not particularly limited, and are, for example, polyethylene, polypropylene, and polybutadiene, respectively. Polyolefins such as ethylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyester, acrylic resin, ABS resin, AS resin, ionomer, polyacetal, polyphenylene Various resin materials such as ren sulfide and polyether ether ketone are exemplified.
プロテク夕 8は、 ほぼ筒状の部材で構成されたプロテクタ本体 8 1と、 後述す るシャッター部材 (シャツ夕一手段) 8 5とを備えている。 プロテク夕本体 8 1 の中心部には、 内釙 5が揷通される針体通路 8 2が、 プロテクダ本体 8 1の基端 から先端まで貫通して形成されている。  The protector 8 includes a protector body 81 composed of a substantially cylindrical member, and a shutter member (a shirt means) 85 described later. At the center of the protector body 81, a needle passageway 82 through which the inner wall 5 is formed is formed penetrating from the base end to the distal end of the protector body 81.
針体通路 8 2の横断面形状は、 円形であり、 針体通路 8 2の内径は、 内針 5の 外径と等しいか、 またはそれより若干大きい値に設定されている。  The cross-sectional shape of the needle passage 82 is circular, and the inner diameter of the needle passage 82 is set equal to or slightly larger than the outer diameter of the inner needle 5.
また、 プロテク夕本体 8 1の内部、 すなわち針体通路 8 2の途中には、 針体通 路 8 2を拡径した空間 8 3が形成されている。 この空間 8 3内には、 後述す るシャッター部材 8 5が収納される。 空間 8 3は、 円柱状、 角柱状、 異型形状で も良いが、 直方体状が好ましい。 空間 8 3は、 シャツ夕一部材 8 5を第 1の姿勢 で収納でき、 第 2の姿勢に充分復元できる大きさとする。  Further, inside the protector body 81, that is, in the middle of the needle passage 82, a space 83 in which the diameter of the needle passage 82 is enlarged is formed. In this space 83, a shutter member 85 described later is housed. The space 83 may be cylindrical, prismatic, or irregularly shaped, but is preferably a rectangular parallelepiped. The space 83 is large enough to store the shirt member 85 in the first position and to restore the second position sufficiently.
また、 プロテク夕本体 8 1の先端側は、 外針ハブ 3と嵌合し得る形状をなして いる。 例えば、 その外径が先端に向かって漸減するテーパ状とされている。 また、 プロテク夕本体 8 1の基端側は、 外針ハブ 3から露出している。 この露 出部分 8 l aは、 略円柱状をなしており、 手で把持し得る程度の長さを有してい る。 露出部分 8 1 aを有することにより、 外針から抜き取られた内釙 5の針先 5 1がプロテク夕内に充分収納できるスペースが確保できる。 The distal end side of the protector body 81 has a shape that can be fitted to the outer needle hub 3. For example, it has a tapered shape whose outer diameter gradually decreases toward the tip. The proximal end of the protector body 81 is exposed from the outer needle hub 3. The exposed portion 8 la has a substantially columnar shape, and is long enough to be gripped by hand. By having the exposed portion 8 1 a, the needle tip 5 of the inner needle 5 extracted from the outer needle 5 One can secure enough space in the protection area.
プロテク夕本体 8 1の基端は、 内釙ハブ 6の先端と、 当接する構成となってい て、 内針ハブ 6をプロテク夕 8に対して基端方向へ移動させることができる。 また、 プロテク夕本体 8 1の長手方向の中央部には、 外針八ブ 3の基端縁部と 嵌合するリング状に突出した嵌合部 8 4が形成されている。 この嵌合部 8 4は、 例えば、 外針ハブ 3からプロテク夕 8を取り外す操作の際に、 指を引っ掛けて該 操作を行うのに用いることもできる。  The proximal end of the protector body 81 is configured to abut the distal end of the inner hub 6 so that the inner needle hub 6 can be moved in the proximal direction relative to the protector 8. Further, a fitting portion 84 projecting in a ring shape is formed at the central portion in the longitudinal direction of the protector main body 81 so as to fit with the base end of the outer needle 3. The fitting portion 84 can also be used, for example, for hooking a finger when performing the operation of removing the protector 8 from the outer needle hub 3.
なお、 図示の構成では、 プロテク夕本体 8 1は、 一体的に形成されているが、 これに限らず、 例えば後述する第 6実施形態のように、 2部材を固着したもので- あってもよい。 この場合、 プロテク夕本体 8 1を 2部材に分離した状態で、 その 内部 (空間 8 3内) にシャッター部材 8 5を収納 (設置) することができる。 シャツ夕一部材 8 5は、 空間 8 3より基端側に位置する内針 5の針先 5 1が先 端方向へ向かって通過するのを阻止する機能を有する。  In the illustrated configuration, the protector body 81 is formed integrally, but is not limited thereto. For example, the protector body 81 may be formed by fixing two members as in a sixth embodiment described later. Good. In this case, the shutter member 85 can be stored (installed) inside (in the space 83) with the protector body 81 separated into two members. The shirt evening member 85 has a function of preventing the needle tip 51 of the inner needle 5 located on the base end side from the space 83 from passing toward the tip end.
シャツ夕一部材 8 5は、 第 1の部位 8 6と、 この第 1の部位 8 6に対し略 V字 状に屈曲する屈曲部 (連結部) 8 8を介して存在する第' 2の部位 8 7とを備え、 弾力性を有する (弾性的に変形する) 帯状の板部材を曲げることにより、 一体的 に形成されている。  The shirt evening member 85 includes a first portion 86 and a second portion existing through a bent portion (connecting portion) 88 that is bent in a substantially V shape with respect to the first portion 86. 87, and are integrally formed by bending a band-shaped plate member having elasticity (resiliently deformed).
このシャッ夕一部材 8 5は、 第 1の部位 8 6と第 2の部位 8 7とのなす角度が 変化すること、 すなわち、 第 1の部位 8 6の基端 8 6 1付近 (屈曲部 8 8と反対 側の端部) と、 第 2の部位 8 7の基端 8 7 1付近 (屈曲部 8 8と反対側の端部) との距離が変化することによって、 内針 5が釙体通路 8 2を揷通 (貫通) 可能な 第 1の姿勢 (図 1および図 3に示す姿勢) と、 内針 5の針先 5 1の通過を阻止す る第 2の姿勢 (図 2および図 4に示す姿勢) とに変形 (変位) する。 This shut-off member 85 has a structure in which the angle between the first portion 86 and the second portion 87 changes, that is, the vicinity of the base end 861 of the first portion 86 (the bent portion 8 8) and the distance between the proximal end 871 of the second portion 87 and the vicinity of the proximal end 871 (end opposite to the bent portion 88) changes the inner needle 5 The first position (the position shown in FIGS. 1 and 3), which allows the passage 82 to pass (penetrate), and prevents the inner needle 5 from passing through the needle tip 51 To the second posture (the posture shown in Figs. 2 and 4).
すなわち、 内釙 5が針体通路 8 2に揷通 (貫通) しているとき、 シャツ夕一部 材 8 5は、 屈曲部 8 8を中心に第 1の部位 8 6と第 2の部位 8 7とが互いに近づ くように圧縮された (曲げられた) 状態で空間 8 3内に収納 (設置) され、 第 1 の姿勢 (図 1および図 3に示す姿勢) となっている。 なお、 この状態では、 第 1 の部位 8 6の基端 8 6 1付近 (屈曲部 8 8と反対側の端部) は、 空間 8 3の上部 (プロテク夕本体 8 1の内面近傍) に当接し、 第 2の部位 8 7の基端 8 7 1付近 (屈曲部 8 8と反対側の端部) は 内針 5の外周面近傍に当接している。  That is, when the inner lining 5 penetrates (penetrates) the needle passageway 82, the shirt evening material 85 becomes the first portion 86 and the second portion 8 around the bent portion 88. 7 are stored (installed) in the space 83 in a compressed (bent) state so as to approach each other, and have the first posture (the posture shown in FIGS. 1 and 3). In this state, the vicinity of the base end 861 of the first portion 86 (the end opposite to the bent portion 88) is located above the space 83 (near the inner surface of the protection body 81). The vicinity of the base end 871 of the second portion 87 (the end opposite to the bent portion 88) is in contact with the vicinity of the outer peripheral surface of the inner needle 5.
一方、 内釙ハブ 6をプロテク夕 8に対し基端方向へ移動させると、 内針 5の針 先 5 1は、 基端方向へ移動し、 空間 8 3を通過する。 このとき、 シャッター部材 8 5は、 圧縮状態が解除され、 自らの弾性力により、 第 1の部位 8 6と第 2の部 位 8 7とが屈曲部 8 8を中心に互いに遠ざかるように広がり、 基端 8 6 1付. 近は、 空間 8 3の上部 (プロテク夕本体 8 1の内面) に当接した状態を維持しつ つ、 基端 8 7 1付近は、 空間 8 3の底部 (プロテク夕本体 8 1の内面) に 当接し、 第 2の姿勢 (図 2および図 4に示す姿勢) となる。 この状態で、 シャツ夕一部材 8 5は、 釙先 5 1の先端方向への移動 (通過) を阻む。  On the other hand, when the inner hub 6 is moved in the proximal direction with respect to the protector 8, the needle tip 51 of the inner needle 5 moves in the proximal direction and passes through the space 83. At this time, the compressed state of the shutter member 85 is released, and the first portion 86 and the second portion 87 spread apart from each other around the bent portion 88 by their own elastic force, The proximal end is attached to the top of the space 83 (the inner surface of the protector body 81), while the proximal end is near the bottom of the space 83 (the protector). (The inner surface of the evening body 81) and the second posture (the posture shown in FIGS. 2 and 4). In this state, the shirt evening member 85 prevents the tip 51 from moving (passing) in the tip direction.
なお、 シャッター部材 8 5の幅 (図 1〜図 4中、 紙面に垂直な方向の長 さ) は、 針体通路 8 2の内径より大きく設定されている。 このため、 仮に、 内釙 ハブ 6の基端に先端方向への力が付与された場合でも、 内針 5は、 釙先 5 1 がシャッター部材 8 5の基端面に当接した状態からさらに先端方向へ移動するの が阻止される。 すなわち、 内釙 5は、 針先 5 1がシャツ夕一部材 8 5の基端面に 当接した状態で、 シャッター部材 8 5ごと先端方向へ移動しょうとしても、 シャツ夕—部材 8 5が針体通路 8 2内に入り込むことがないので、 それ以上、 先 端方向へ移動することが阻止 (防止) される。 The width of the shutter member 85 (the length in the direction perpendicular to the paper in FIGS. 1 to 4) is set to be larger than the inner diameter of the needle body passage 82. For this reason, even if a force in the distal direction is applied to the proximal end of the inner hub 6, the inner needle 5 moves further from the state where the tip 51 abuts on the proximal end surface of the shutter member 85. Movement in the direction is prevented. In other words, when the inner tip 5 is in a state where the needle tip 51 is in contact with the base end face of the shirt evening member 85, and the shutter member 85 is to be moved in the distal direction, Since the shirt member-85 does not enter the needle body passage 82, further movement in the tip direction is prevented (prevented).
このような構成のシャッター部材 8 5は、 圧縮された状態である第 1の姿勢か ら、 ほぼ元の形状である第 2の姿勢への復元力に優れるものである。 このため、 シャツ夕一部材 8 5に曲がりグセが付くのが防止されるので、 留置針組立体 1を 長期間保管した場合でも、 シャッター部材 8 5は、 確実に第 2の姿勢となり、 針 先 5 1の先端方向への移動を阻止 (防止) する十分な効果を発揮することができ る。  The shutter member 85 having such a configuration is excellent in a restoring force from the first posture in the compressed state to the second posture having a substantially original shape. For this reason, since the bending of the shirt evening member 85 is prevented, even when the indwelling needle assembly 1 is stored for a long period of time, the shutter member 85 reliably assumes the second position, and the needle tip 5 A sufficient effect of preventing (preventing) the movement of 1 in the direction of the tip can be exerted.
シャツ夕一部材 8 5の厚さは、 特に限定されないが、 例えば、 0 . 0 4〜 0 . 2 mm程度であるのが好ましく、 0 . 0 8〜0 . 1 mm程度であるのがより 好ましい。 シャツ夕一部材 8 5が前記の下限値より薄いと、 第 2の姿勢で、 内針 ハブ 6がその基端に先端方向に向かって受ける力の大きさによっては、 内針 5が 先端方向へ移動し、 釙先 5 1がシャツ夕一部材 8 5を突き破ってしまう場合があ る。 一方、 シャツ夕一部材 8 5が前記の上限値より厚いと、 シャッター部材 8 5 は、 その構成材料によっては、 第 1の姿勢のとき、 内針 5の外周面との摩擦抵抗 が増大する場合がある。  The thickness of the shirt evening member 85 is not particularly limited, but is preferably, for example, about 0.04 to 0.2 mm, more preferably about 0.08 to 0.1 mm. . If the shirt evening member 85 is thinner than the above lower limit, the inner needle 5 moves in the distal direction in the second posture, depending on the magnitude of the force that the inner needle hub 6 receives toward its distal end toward the proximal end. In some cases, the tip 51 may break through the shirt member 85. On the other hand, if the shirt member 85 is thicker than the above upper limit, the shutter member 85 may increase the frictional resistance with the outer peripheral surface of the inner needle 5 in the first posture depending on the constituent material. There is.
シャッター部材 8 5の構成材料は、 釙先 5 1の通過を阻止し得るものであ れば、 いかなるものでもよく、 例えば、 ポリエチレン、 ポリプロピレン、 ポリブ 夕ジェン、 エチレン一酢酸ビニル共重合体等のポリオレフイン、 ポリ塩化ビ ニル、 ポリウレタン、 ポリスチレン、 ポリメチルメタクリレート、 ポリ力一 ポネート、 ポリアミド、 ポリエチレンテレフタレート、 ポリブチレンテレフ 夕レート等のポリエステル、 アクリル系樹脂、 AB S樹脂、 A S樹脂、 アイオノ マ一、 ポリアセ夕一ル、 ポリフエ二レンサルファイド、 ポリエーテルエーテルケ トン等の各種樹脂材料、 ステンレス鋼、 アルミニウム合金、 銅または銅系合金、 チタンまたはチタン合金等の各種金属材料等が挙げられる。 The constituent material of the shutter member 85 may be any material as long as it can prevent the passage of the tip 51, for example, polyolefin such as polyethylene, polypropylene, polybutene, and ethylene-vinyl acetate copolymer. , Polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polypropionate, polyamide, polyethylene terephthalate, polybutylene terephthalate, polyester, acrylic resin, ABS resin, AS resin, Iono Examples include various resin materials such as polyester, polyacetylene, polyphenylene sulfide, and polyether ether ketone, and various metal materials such as stainless steel, aluminum alloy, copper or copper-based alloy, and titanium or titanium alloy.
また、 このようなシャツタ一部材 8 5の表面には、 潤滑剤が付与されているの が好ましい。 これにより、 内針 5の外周面と第 2の部位 8 7の基端 8 7 1付近と の摩擦抵抗 (摺動抵抗) が低減し、 内針 5のプロテク夕 8の基端方向への移動を より円、滑に行うことが、できる。 潤、滑剤としては、 例えば、 シリコーン、 シリコー ンオイル、 グリース、 各種オイル、 界面活性剤等を用いることができる。  Further, it is preferable that a lubricant is applied to the surface of the shirt member 85. As a result, the frictional resistance (sliding resistance) between the outer peripheral surface of the inner needle 5 and the proximal end 871 of the second portion 87 is reduced, and the inner needle 5 moves in the proximal direction of the protective sheath 8. Can be performed more smoothly and smoothly. As the lubricant and lubricant, for example, silicone, silicone oil, grease, various oils, surfactants and the like can be used.
なお、 本実施形態では、 第 1の部位 8 6の基端 8 6 1付近は、 単にプロテクタ 本体 8 1の内面と当接する構成となっている。 これに限定されるものではなく、 プロテクタ本体 8 1に、 例えば、 埋入、 融着、 接着剤による接着等の方法に より、 固定されていてもよいが、 固定されない方が第 1の姿勢から第 2の姿勢へ の復元力に優れ、 組み立て工程も簡易であり好ましい。  In the present embodiment, the vicinity of the base end 861 of the first portion 86 is simply in contact with the inner surface of the protector body 81. The present invention is not limited to this. The protector body 81 may be fixed to the protector body 81 by, for example, embedding, fusing, bonding with an adhesive, or the like. It is preferable because it has excellent restoring force to the second posture and the assembling process is simple.
このような留置針組立体 1は、 プロテクタ 8が内針 5の針先 5 1を収納し た (覆った) 状態で、 プロテク夕 8が内釙 5の針先 5 1から離脱するのを阻止す る離脱阻止手段 (9 a、 9 b、 9 c ) をさらにを有していても良い。 以下、 この 離脱阻止手段 9 aの構成について説明する。  Such an indwelling needle assembly 1 prevents the protector 8 from detaching from the inner needle 5 needle tip 51 when the protector 8 stores (covers) the needle tip 51 of the inner needle 5. The device may further include a detachment preventing means (9a, 9b, 9c). Hereinafter, the configuration of the separation prevention means 9a will be described.
内針 5の先端から所定長さの位置の外周面には、 凹部 (第 1の係合部) 9 1が 形成されている。  A concave portion (first engaging portion) 91 is formed on the outer peripheral surface at a predetermined length from the tip of the inner needle 5.
一方、 プロテク夕 8 (プロテクタ本体 8 1 ) の基端には、 弾性変形可能な係止 部材 (板パネ) 9 2が突出形成されている。 係止部材 9 2は、 プロテク夕と同一 部材で形成されてもよいが別部材としてプロテク夕に固定、 埋入、 融着、 接着さ れていてもよい。 係止部材 9 2は、 その先端を固定端、 その基端を可動端と して、 プロテク夕本体 8 1に片持ち支持され、 可動端が弹性的に内針 5にぼぼ垂 直な方向 (図 1および図 2中、 上下方向) に変位 (変形) する。 この係止部 材 9 2の基端 (可動端) には、 第 2の係止部として、 内針 5に向って突出する爪 (凸部) 9 3がー体的に形成されている。 したがって、 爪 9 3は、 内釙 5にぼぼ 垂直な方向 (図 1および図 2中、 上下方向) に移動することができる。 On the other hand, at the base end of the protector 8 (protector body 81), an elastically deformable locking member (panel panel) 92 is formed so as to protrude. The locking member 92 may be formed of the same material as the protector, but may be fixed, embedded, fused, or adhered to the protector as a separate member. It may be. The locking member 92 has a fixed end at its distal end and a movable end at its proximal end, and is cantilevered by the protector body 81, and the movable end is substantially perpendicular to the inner needle 5. Displaces (deforms) vertically in Figs. 1 and 2. At the base end (movable end) of the locking member 92, a claw (projection) 93 projecting toward the inner needle 5 is formed as a second locking portion. Therefore, the claw 93 can move in a direction substantially perpendicular to the inner surface 5 (vertical direction in FIGS. 1 and 2).
留置釙組立体 1の組み立て状態では、 爪 9 3は、 係止部材 9 2の弾性力に より、 内針 5の外周面に当接している (図 1参照) 。 また、 プロテク夕 8 (プロ テク夕本体 8 1 ) が内針 5の針先 5 1を収納する (覆う) と、 爪 9 3は内針 5に 形成された凹部 9 1内に挿入され、 凹部 9 1に係合する (図 2参照) 。 これによ り、 プロテク夕 8が内針 5の針先 5 1から外れる (離脱する) のが阻止される。 このような凹部 9 1と爪 9 3とで、 離脱阻止手段 9 aが構成される。  In the assembled state of the indwelling assembly 1, the claw 93 is in contact with the outer peripheral surface of the inner needle 5 by the elastic force of the locking member 92 (see FIG. 1). When the protector 8 (protector body 8 1) stores (covers) the needle tip 51 of the inner needle 5, the claw 93 is inserted into the recess 91 formed in the inner needle 5, 9 Engage with 1 (see Fig. 2). As a result, the protector 8 is prevented from coming off (withdrawing) from the needle tip 51 of the inner needle 5. The recess 91 and the claw 93 constitute the separation prevention means 9a.
また、 凹部 9 1は、 内針 5の長手方向および/または周方向に沿って複数個形 成されていてもよい。  In addition, a plurality of the concave portions 91 may be formed along the longitudinal direction and / or the circumferential direction of the inner needle 5.
なお、 図示の構成では、 凹部 9 1は、 内針 5の外周方向の一部に形成されてい るが、 これに限らず、 内針 5の外周面の全周に渡って環状に形成されていてもよ く、 また、 内針 5の外周面の長手方向に沿って形成された溝で構成することもで きる。  In the illustrated configuration, the concave portion 91 is formed in a part of the outer peripheral direction of the inner needle 5, but is not limited to this, and is formed in a ring shape over the entire outer peripheral surface of the inner needle 5. Alternatively, it may be configured by a groove formed along the longitudinal direction of the outer peripheral surface of the inner needle 5.
次に、 留置釙組立体 1の使用方法の一例について、 詳細に説明する。  Next, an example of a method of using the indwelling assembly 1 will be described in detail.
[ 1 ] 留置釙組立体 1を組み立て状態とし、 内針八ブ 6等を手で把持し つつ、 内針 5および外針 2を患者の血管 (静脈または動脈) に穿刺する。  [1] With the indwelling assembly 1 in the assembled state, the inner needle 5 and the outer needle 2 are punctured into the blood vessel (vein or artery) of the patient while grasping the inner needle 6 and the like by hand.
[ 2 ] 内針 5の針先 5 1が血管に穿刺されると、 血管の内圧 (血圧) により 血液が内釙 5内を基端方向へ逆流し、 内針ハブ 6内に導入され、 視認性を有する 内釙ハブ 6を介してこのフラッシュバックを視認することができる。 これにより 内針 5の針先 5 1が血管を確保したことを知ることができる。 [2] When the needle tip 51 of the inner needle 5 is punctured into a blood vessel, the internal pressure (blood pressure) of the blood vessel causes The blood flows backward in the inner tube 5 in the proximal direction, is introduced into the inner needle hub 6, and the flashback can be visually recognized through the inner hub 6 having visibility. This makes it possible to know that the needle tip 51 of the inner needle 5 has secured a blood vessel.
なお、 この血液の流入に伴い、 内針ハブ 6内の空気は、 通気フィル夕 6 2 を通って排出されるが、 血液は、 通気フィルタ 6 2を通過できず、 外部への漏れ 出しは生じない。  With the inflow of the blood, the air in the inner needle hub 6 is exhausted through the ventilation filter 62, but the blood cannot pass through the ventilation filter 62 and leaks to the outside. Absent.
[ 3 ] さらに内釙 5および外針 2を微小距離先端方向へ進めると、 外釙 2の 先端開口 2 1が血管内に挿入される。 これにより、 外釙 2が血管を確保する。  [3] When the inner needle 5 and the outer needle 2 are further advanced in the distal direction by a small distance, the distal opening 21 of the outer needle 2 is inserted into the blood vessel. Thus, the outer shell 2 secures a blood vessel.
[ 4 ] 血管に留置されている外針 2を手で押さえつつ、 他方の手で内針ハブ 6を把持し、 基端方向へ引っ張る。 これにより、 内釙 5が外針 2から抜き取られ る。 なお、 このとき、 プロテク夕 8は、 外針ハブ 3に嵌合した状態が維持さ れる。  [4] While holding down the outer needle 2 placed in the blood vessel by hand, grasp the inner needle hub 6 with the other hand and pull in the proximal direction. As a result, the inner needle 5 is extracted from the outer needle 2. At this time, the state in which the protector 8 is fitted to the outer needle hub 3 is maintained.
[ 5 ] 前記工程 [ 4 ] により、 内針 5は、 組み立て状態の位置から基端方向 へ移動するが、 内釙 5の釙先 5 1がプロテクタ 8の内部の空間 8 3を通過するま では、 シャッター部材 8 5は、 前記第 1の姿勢を維持し、 第 2の部位 8 7の基端 8 7 1付近が内針 5の外周面に当接する (図 1および図 3参照) 。  [5] By the above step [4], the inner needle 5 moves from the assembled state toward the base end, but until the tip 51 of the inner needle 5 passes through the space 83 inside the protector 8. The shutter member 85 maintains the first posture, and the vicinity of the base end 871 of the second portion 87 comes into contact with the outer peripheral surface of the inner needle 5 (see FIGS. 1 and 3).
[ 6 ] さらに内釙 5が基端方向へ移動し、 針先 5 1が空間 8 3を通過す ると、 シャッター部材 8 5は、 '自らの弾性力により、 第 1の部位 8 6と第 2の部 位 8 7とが屈曲部 8 8を中心に互いに遠ざかるよう移動する。 すなわち、 シャツ 夕一部材 8 5は、 空間 8 3内で開く (広がる) 。 このとき、 第 1の部位 8 6の基 端 8 6 1付近は、 空間 8 3の上部に当接し、 第 2の部位 8 7の基端 8 7 1付 近は、 空間 8 3の底部に当接する。 これにより、 シャツ夕一部材 8 5は、 前記第 2の姿勢となる (図 2および図 4参照) 。 [6] When the inner rim 5 further moves in the proximal direction and the needle tip 51 passes through the space 83, the shutter member 85 ′, by its own elastic force, The second part 87 moves away from each other about the bent part 88. That is, the shirt member 85 opens (spreads) in the space 83. At this time, the vicinity of the base 861 of the first portion 86 contacts the upper portion of the space 83, and the vicinity of the base 871 of the second portion 87 contacts the bottom of the space 83. Touch As a result, the shirt member 85 can be 2 (see Figures 2 and 4).
このように、 シャッター部材 8 5が第 2の姿勢となると、 針先 5 1が再び先端 方向へ戻るように移動しょうとしても、 針先 5 1がシャッター部材 8 5に当 接し、 戻ることはできない。  As described above, when the shutter member 85 is in the second posture, even if the needle tip 51 attempts to move back to the tip direction, the needle tip 51 comes into contact with the shutter member 85 and cannot return. .
[ 7 ] 針先 5 1が空間 8 3を通過し、 シャツ夕一部材 8 5が第 2の姿勢 となったら、 これとほぼ同時に、 係止部材 9 2の爪 9 3が内針 5に形成された凹 部 9 1に挿入され、 係止する (図 2および図 4参照) 。  [7] When the needle tip 51 passes through the space 83 and the shirt evening member 85 assumes the second position, the claw 93 of the locking member 92 is formed on the inner needle 5 almost simultaneously. It is inserted into the recessed part 91 and locked (see FIGS. 2 and 4).
これにより、 プロテク夕 8が針先 5 1を覆った後、 内針 5の針先 5 1からプロ テク 8が離脱する (外れる) ことが防止される。  As a result, after the protector 8 covers the needle tip 51, the protector 8 is prevented from being detached (detached) from the needle tip 51 of the inner needle 5.
[ 8 ] このようにして内釙 5の針先 5 1がプロテク夕 8で覆われたら、 外針 ハブ 3に嵌合しているプロテク夕 8を外針ハブ 3から取り外す。 これにより、 針 先 5 1がプロテクタ 8で覆われたハブ付き内針 7と、 ハブ付き外針 4とが分離さ れる。  [8] When the needle tip 51 of the inner needle 5 is covered with the protector 8 in this way, the protector 8 fitted to the outer needle hub 3 is removed from the outer needle hub 3. As a result, the inner needle 7 with a hub whose needle tip 51 is covered with the protector 8 and the outer needle 4 with a hub are separated.
[ 9 ] 内釙 5が抜き取られたハブ付き外針 4の外針ハブ 3には、 輸液セット のコネクタ等 (図示せず) を素早く接続し、 定法に従い、 輸液の投与を開始 する。  [9] Quickly connect the infusion set connector (not shown) to the outer needle hub 3 of the outer needle 4 with the hub from which the inner 釙 5 has been removed, and start administering the infusion according to a standard method.
このようにして外釙 2から内釙 5を抜き取つた後は、 ハブ付き内釙 7は不要と なるため、 廃棄処分に供される。 このハブ付き内釙 7は、 針先 5 1がプロテクタ 8で覆われており、 特に、 針先 5 1がシャツ夕一部材 8 5を超えてそれより先端 側へ移動し、 プロテク夕 8の先端から突出することや、 針先 5 1が基端方向へ移 動し、 プロテク夕 8が外れてしまうことがないため、 廃棄処理を行なう者等が針 先 5 1で誤って手指等を刺すという事故が防止される。 さらに、 このような留置針組立体 1では、 プロテク夕 8と外釙ハブ 3との嵌合 力 (接合力) を、 凹部 9 1と爪 9 3との係合力より小さく設定することにより、 次のような作用 '効果が生じる。 すなわち、 前記工程 [ 7 ] の状態から、 内針 5 を基端方向へ引くと、 内針 5とともにプロテク夕 8も基端方向へ引っ張られ、 外 針ハブ 3に嵌合していたプロテク夕 8を外針ハブ 3から抜き取ることができ る。 After the inside 5 has been extracted from the outside 2 in this way, the inside 7 with the hub is no longer needed and is therefore disposed of. In the inner wall 7 with the hub, the needle tip 51 is covered with the protector 8, and in particular, the needle tip 51 moves to the tip side beyond the shirt evening member 85, and the tip end of the protector 8 The needle tip 51 moves in the proximal direction and the protector 8 does not come off, so that the person who disposes of it accidentally stabs a finger or the like with the needle tip 51. Accidents are prevented. Further, in such an indwelling needle assembly 1, by setting the fitting force (joining force) between the protector 8 and the outer hub 3 smaller than the engaging force between the concave portion 91 and the claw 93, The effect is like 'the effect occurs. That is, when the inner needle 5 is pulled in the proximal direction from the state of the step [7], the protector 8 is also pulled in the proximal direction together with the inner needle 5, and the protector 8 fitted to the outer needle hub 3 is pulled. Can be withdrawn from the outer needle hub 3.
このように、 内針 5を外針 2から引き抜く動作にともなって、,プロテク夕 8を 外針ハプ 3から離脱させ、 内針 5の針先 5 1を覆う動作を行なうことができるの で、 その操作をより簡単に行なうことができる。  Thus, with the operation of pulling out the inner needle 5 from the outer needle 2, the protector 8 can be detached from the outer needle hap 3, and the operation of covering the needle tip 51 of the inner needle 5 can be performed. The operation can be performed more easily.
<第 2実施形態 >  <Second embodiment>
次に、 本発明の留置針組立体の第 2実施形態について説明する。  Next, a second embodiment of the indwelling needle assembly of the present invention will be described.
図 5および図 6は、 それぞれ、 第 2実施形態の留置釙組立体が備えるプロテク 夕の先端側の構成を示す縦断面図である。 以下、 図 5および図 6に示す留置針組 立体 1について、 前記第 1実施形態との相違点を中心に説明し、 同様の事項につ いては、 その説明を省略する。  FIGS. 5 and 6 are longitudinal cross-sectional views each showing a configuration of a distal end side of a protection device provided in the indwelling device assembly according to the second embodiment. Hereinafter, the indwelling needle assembly three-dimensional body 1 shown in FIGS. 5 and 6 will be described focusing on the differences from the first embodiment, and the description of the same matters will be omitted.
第 2実施形態の留置針組立体 1では、 シャッ夕一部材 8 5の構成が異なってい いること以外は、 前記第 1実施形態と同様である。  The indwelling needle assembly 1 of the second embodiment is the same as the first embodiment, except that the configuration of the shutter member 85 is different.
すなわち、 第 1の部位 8 6は、 その途中に第 2の部位 8 7 (他方) に向かって 突出する突出部 8 6 2が形成されている。 この突出部 8 6 2は、 第 1の部位 8 6 を屈曲させることにより形成されたものである。  That is, the first portion 86 has a projecting portion 862 protruding toward the second portion 87 (the other side) in the middle thereof. The protruding portion 862 is formed by bending the first portion 86.
このような突出部 8 6 2を設けることにより、 シャツ夕一部材 8 5は、 第 1の 姿勢 (図 5に示す姿勢) において、 より強く圧縮された状態となる。 このため、 シャッター部材 8 5は、 第 2の姿勢 (図 6に示す姿勢) への復元がより確実にな される。 By providing such a protruding portion 862, the shirt evening member 85 is in a more strongly compressed state in the first posture (the posture shown in FIG. 5). For this reason, The shutter member 85 is more reliably restored to the second posture (the posture shown in FIG. 6).
なお、 このような突出部 8 6 2は、 第 1の部位 8 6または第 2の部位 8 7の少 なくとも一方に設けられていればよく、 他方の形状は、 特に限定されない。 また、 突出部 8 6 2は、 第 1の部位 8 6や第 2の部位 8 7を湾曲させることに より形成してもよい。  In addition, such a protruding portion 862 may be provided on at least one of the first portion 86 and the second portion 87, and the shape of the other is not particularly limited. Further, the projecting portion 862 may be formed by curving the first portion 86 and the second portion 87.
<第 3実施形態 >  <Third embodiment>
次に、 本発明の留置針組立体の第 3実施形態について説明する。  Next, a third embodiment of the indwelling needle assembly of the present invention will be described.
図 7および図 8は、 それぞれ、 第 3実施形態の留置針組立体が備えるプロテク 夕の先端側の構成を示す縦断面図である。 以下、 図 7および図 8に示す留置針組 立体 1について、 前記第 1実施形態との相違点を中心に説明し、 同様の事項につ いては、 その説明を省略する。  7 and 8 are longitudinal cross-sectional views each showing a configuration of the distal end side of a protector provided in the indwelling needle assembly according to the third embodiment. Hereinafter, the indwelling needle assembly three-dimensional body 1 shown in FIGS. 7 and 8 will be described focusing on the differences from the first embodiment, and the description of the same matters will be omitted.
第 3実施形態の留置針組立体 1では、 シャッ夕一部材 8 5の構成が異なってい いること以外は、 前記第 1実施形態と同様である。  The indwelling needle assembly 1 of the third embodiment is the same as the first embodiment, except that the configuration of the shutter member 85 is different.
すなわち、 第 1の部位 8 6は、 その途中に第 2の部位 8 7に向かって突出する 突出部 8 6 2が形成されている。 この突出部 8 6 2は、 第 1の部位 8 6を湾曲さ せることにより形成されたものである。  That is, the first portion 86 has a protruding portion 862 protruding toward the second portion 87 in the middle thereof. The projecting portion 862 is formed by bending the first portion 86.
内針 5が針体通路 8 2に揷通 (貫通) しているとき、 シャッター部材 8 5は、 第 1の部位 8 6の基端 8 6 1付近および屈曲部 8 8付近が空間 8 3の上部 (プロ テク夕本体 8 1の内面) に、 また、 第 2の部位 8 7の基端 8 7 1付近が内釙 5の 外周面に、 それぞれ、 当接し、 突出部 8 6 2の曲率半径が増大する (第 1の部位 8 6が平板に近づく) ような状態で空間 8 3内に収納 (設置) され、 第 1の姿勢 (図 7に示す状態) となっている。 When the inner needle 5 penetrates (penetrates) the needle passageway 82, the shutter member 85 is located near the base end 861 of the first portion 86 and the bent portion 88 near the space 83. The upper part (the inner surface of the protective body 81) and the proximal end 871 of the second part 87 come into contact with the outer peripheral surface of the inner part 5, respectively, and the radius of curvature of the projecting part 862 (The first part 86 approaches the flat plate) in the space 83 (first position). (The state shown in Fig. 7).
一方、 内針ハブ 6をプロテク夕 8に対し基端方向へ移動させると、 内針 5の針 先 5 1は、 基端方向へ移動し、 空間 8 3を通過する。 このとき、 第 1の部位 8 6 の基端 8 6 1付近および屈曲部 8 8付近は、 それぞれ、 空間 8 3の上部 (プロテ クタ本体 8 1の内面) に当接した状態を維持しつつ、 第 1の部位 8 6は、 自らの 弾性力により曲率半径が減少するようにほぼ元の形状に戻る。 これにより、 第 2 の部位 8 7は、 屈曲部 8 8を中心に回動し、 その基端 8 7 1付近が空間 8 3の底 部 (プロテクタ本体 8 1の内面) に当接し、 シャツタ一部材 8 5は、 第 2の姿勢 (図 8に示す姿勢) となる。 この状態で、 シャッター部材 8 5は、 針先 5 1の先 端方向への移動 (通過) を阻む。  On the other hand, when the inner needle hub 6 is moved in the proximal direction with respect to the protector 8, the needle tip 51 of the inner needle 5 moves in the proximal direction and passes through the space 83. At this time, the vicinity of the base end 861 of the first portion 86 and the vicinity of the bent portion 88 are maintained in contact with the upper part of the space 83 (the inner surface of the protector body 81), respectively. The first portion 86 returns to almost its original shape so that the radius of curvature is reduced by its own elastic force. As a result, the second portion 87 rotates about the bent portion 88, and the vicinity of the base end 871 abuts against the bottom of the space 83 (the inner surface of the protector body 81). The member 85 is in the second posture (the posture shown in FIG. 8). In this state, the shutter member 85 prevents the needle tip 51 from moving (passing) toward the tip end.
このような構成によっても、 シャツ夕一部材 8 5は、 第 2の姿勢への復元がよ り確実になされる。  Even with such a configuration, the shirt evening member 85 can be more reliably restored to the second posture.
ぐ第 4実施形態 >  4th embodiment>
次に、 本発明の留置針組立体の第 4実施形態について説明する。  Next, a fourth embodiment of the indwelling needle assembly of the present invention will be described.
図 9および図 1 0は、 それぞれ、 第 4実施形態の留置針組立体が備えるプロデ クタの先端側の構成を示す縦断面図である。 以下、 図 9および図 1 0に示す留置. 針組立体 1について、 前記第 1および第 3実施形態との相違点を中心に説明し、 同様の事項については、 その説明を省略する。  FIG. 9 and FIG. 10 are longitudinal cross-sectional views each showing the configuration of the distal end side of the detector included in the indwelling needle assembly of the fourth embodiment. Hereinafter, the indwelling needle assembly 1 shown in FIGS. 9 and 10 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
第 4実施形態の留置針組立体 1では、 シャッター部材 8 5の構成が異なってい ること以外は、 前記第 1実施形態と同様である。  The indwelling needle assembly 1 of the fourth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
すなわち、 シャッター部材 8 5は、 第 1の姿勢 (図 9に示す姿勢) のとき、 突 出部 8 6 2が S字状に折りたたまれた状態で、 空間 8 3内に収納 (設置) されて いる。 That is, when the shutter member 85 is in the first position (the position shown in FIG. 9), the protrusion portion 862 is stored (installed) in the space 83 with the protruding portion 862 folded in an S-shape. I have.
このシャツ夕一部材 8 5は、 内針 5の針先 5 1が基端方向へ移動し、 空間 8 3 を通過すると、 第 1の部位 8 6の S字状に折りたたまれていた突出部 8 6 2が自 らの弹性力によりほぼ元の形状に戻り、 第 2の姿勢 (図 1, 0に示す姿勢) と なる。  When the needle tip 51 of the inner needle 5 moves in the proximal direction and passes through the space 83, the protruding portion 8 of the first portion 86 folded in an S-shape 62 reverts to almost the original shape due to its natural force, and assumes the second posture (the posture shown in FIGS. 1 and 0).
このような構成では、 シャッター部材 8 5は、 S字状に折りたたまれる突出部 8 6 2を有しているので、 その材質自体の弾性係数にかかわらず、 強い弾力性が 得られ、 第 2の姿勢への復元がより確実になされる。  In such a configuration, since the shutter member 85 has the protruding portion 862 that is folded in an S-shape, strong elasticity is obtained regardless of the elastic coefficient of the material itself, Restoration to the posture is performed more reliably.
く第 5実施形態 >  Fifth Embodiment>
次に、 本発明の留置釙組立体の第 5実施形態について説明する。  Next, a fifth embodiment of the indwelling assembly according to the present invention will be described.
図 1 1および図 1 2は、 それぞれ、 第 5実施形態の留置針組立体が備えるプロ テク夕の先端側の構成を示す縦断面図である。 以下、 図 1 1および図 1 2 ίこ示す 留置釙組立体 1について、 前記第 1および第 3実施形態との相違点を中心に説明 し、 同様の事項については、 その説明を省略する。  FIGS. 11 and 12 are longitudinal cross-sectional views each showing the configuration of the distal end side of a protection needle provided in the indwelling needle assembly according to the fifth embodiment. Hereinafter, the indwelling assembly 1 shown in FIGS. 11 and 12 will be described focusing on the differences from the first and third embodiments, and the description of the same matters will be omitted.
第 5実施形態の留置釙組立体 1では、 シャッター部材 8 5の構成が異なってい ること以外は、 前記第 1実施形態と同様である。  The indwelling assembly 1 of the fifth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
すなわち、 シャッター部材 8 5は、 第 1の姿勢 (図 1 1に示す姿勢) のとき、 第 2の部位 8 7の基端側が湾曲し、 内針 5の外周面に当接した状態で、 空間 8 3 内に収納 (設置) されている。  That is, when the shutter member 85 is in the first posture (the posture shown in FIG. 11), the proximal end side of the second portion 87 is curved, and the shutter member 85 is in contact with the outer peripheral surface of the inner needle 5. It is stored (installed) in 8 3.
このシャッター部材 8 5は、 内釙 5の針先 5 1が基端方向へ移動し、 空間 8 3 を通過すると、 第 1の部位 8 6および第 2の部位 8 7が、 それぞれ、 自らの弹性 力によりほぼ元の形状に戻り、 第 2の姿勢 (図 1 2に示す姿勢) となる。 第 2の部位 8 7の基端側をこのような構成とするとにより、 シャツ夕一部 材 8 5は、 第 1の姿勢 (図 1 1に示す姿勢) において、 第 1の部位 8 6および第 2の部位 8 7がそれぞれ変形し、 より強く圧縮された状態となる。 このた め、 シャッター部材 8 5は、 第 2の姿勢 (図 1 2に示す姿勢) への復元がより確 実になされる。 When the needle tip 51 of the inner member 5 moves in the proximal direction and passes through the space 83, the first member 86 and the second member 87 each have their own characteristics. It returns to its original shape by force, and assumes the second posture (the posture shown in Fig. 12). By making the base end side of the second portion 87 have such a configuration, the shirt material 85 is in the first position (the position shown in FIG. 11) in the first position 86 and the second portion 87. The parts 87 of the second part are each deformed and become in a state of being more strongly compressed. Therefore, the shutter member 85 is more reliably restored to the second position (the position shown in FIG. 12).
<第 6実施形態 >  <Sixth embodiment>
次に、 本発明の留置針組立体の第 6実施形態について説明する。  Next, a sixth embodiment of the indwelling needle assembly of the present invention will be described.
図 1 3は、 第 6実施形態の留置針組立体が備えるプロテク夕の中央部付近の構 成を示す拡大縦断面図である。 以下、 図 1 3に示す留置針組立体 1について、 前 記第 1および第 3実施形態との相違点を中心に説明し、 同様の事項については、 その説明を省略する。 ' 第 6実施形態の留置針組立体 1では、 プロテク夕本体 8 1およびシャツ夕一部 材 8 5の構成が異なっていること以外は、 前記第 1実施形態と同様である。  FIG. 13 is an enlarged vertical cross-sectional view showing the configuration near the center of a protector included in the indwelling needle assembly according to the sixth embodiment. Hereinafter, the indwelling needle assembly 1 shown in FIG. 13 will be described focusing on differences from the first and third embodiments, and the description of the same items will be omitted. 'The indwelling needle assembly 1 of the sixth embodiment is the same as the first embodiment except that the configurations of the protector body 81 and the shirt material 85 are different.
すなわち、 プロテク夕本体 8 1は、 本体部 8 1 1と、 本体部 8 1 1の外周部に 固着 (例えば、 融着、 接着等) された外装部 8 1 2との 2部材で構成されて いる。 製造工程によっては 2部材とする方が有利な場合があるからである。 また、 シャツ夕一部材 8 5は、 第 1の部位 8 6の基端部 (屈曲部 8 8と反対側の 端部) を折り曲げることにより形成した折り曲げ部 8 6 3を有している。  That is, the protector body 81 is composed of two members, a main body portion 811 and an exterior portion 812 fixed (for example, fused or bonded) to the outer peripheral portion of the main body portion 811. I have. This is because it may be advantageous to use two members depending on the manufacturing process. Further, the shirt evening member 85 has a bent portion 863 formed by bending a base end (an end opposite to the bent portion 88) of the first portion 86.
折り曲げ部 8 6 3は、 図 1 3に示すように、 シャツタ一部材 8 5が第 1の姿勢 のとき、 その頂部 8 6 3 aが外装部 8 1 2の内面に当接し、 第 1の部位 8 6の基 端 8 6 1付近が本体部 8 1 1の先端面に当接している。 これにより、 シャッター 部材 8 5は、 プロテクタ本体 8 1の内面との接触面積を増大している。 すな わち、 この折り曲げ部 8 6 3が接触面積増大手段を構成する。 As shown in FIG. 13, when the shirt member 85 is in the first position, the top portion 863 a of the bent portion 863 abuts on the inner surface of the exterior portion 812, and the first portion The vicinity of the base 861 of 86 is in contact with the tip of the main body 811. Thereby, the contact area of the shutter member 85 with the inner surface of the protector body 81 is increased. sand That is, the bent portion 863 constitutes a contact area increasing means.
このような折り曲げ部 8 6 3を設けることにより、 シャツ夕一部材 8 5のプロ テク夕本体 8 1に対する押圧力を分散させ、 プロテク夕本体 8 1の負担を低減す ることができる。  By providing such a bent portion 863, the pressing force of the shirt evening member 85 against the protection evening body 81 can be dispersed, and the burden on the protection evening body 81 can be reduced.
また、 このような折り曲げ部 8 6 3は、 第 1の部位 8 6の基端 8 6 1付近が、 本体部 8 1 1と外装部 8 1 2の固着部分に入り込んでしまうことを防止する機能 も有する。 ただし、 第 6の実施形態のプロテクタ本体 8 1とシャッター部材 8 5 の構成は、 それぞれ別々に他の態様と組み合せてもよい。  Further, such a bent portion 863 has a function of preventing the vicinity of the base end 861 of the first portion 86 from entering the fixed portion between the main body portion 811 and the exterior portion 812. Also have. However, the configurations of the protector body 81 and the shutter member 85 of the sixth embodiment may be separately combined with other aspects.
このようなことから、 折り曲げ部 8 6 3を設けることにより、 プロテク夕本体 8 1の耐久 1"生を向上させることができる。  For this reason, by providing the bent portion 863, the durability of the protection body 81 can be improved.
<第 7実施形態 >  <Seventh embodiment>
次に、 本発明の留置釙組立体の第 7実施形態について説明する。  Next, a seventh embodiment of the indwelling assembly according to the present invention will be described.
図 1 4は、 第 7実施形態の留置針組立体が備えるシャッ夕一部材の第 2の部位 の端部の構成を示す拡大縦断面図である。 以下、 図 1 4に示す留置針組立体 1に ついて、 前記第 1および第 3実施形態との相違点を中心に説明し、 同様の事項に ついては、 その説明を省略する。  FIG. 14 is an enlarged vertical cross-sectional view showing the configuration of the end of the second portion of the shutter member provided in the indwelling needle assembly according to the seventh embodiment. Hereinafter, the indwelling needle assembly 1 shown in FIG. 14 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
第 7実施形態の留置針組立体 1では、 シャッ夕一部材 8 5の構成が異なってい ること以外は、 前記第 1実施形態と同様である。  The indwelling needle assembly 1 of the seventh embodiment is the same as the first embodiment, except that the configuration of the shutter member 85 is different.
すなわち、 シャッター部材 8 5は、 摩擦低減手段として、 第 2の部位 8 7の基 端 8 7 1付近を内針 5に向かって (プロテク夕本体 8 1の中心軸方向に向 かって) 折り曲げることにより、 ビッグテール状に形成した折り曲げ部 8 7 2を 有している。 折り曲げ部 8 7 2は、 図 1 4に示すように、 シャツ夕一部材 8 5が第 1の姿勢 のとき、 内針 5の外周面に当接し、 内針 5の外周面との摩擦抵抗 (摺動抵抗) を 低減している。 これにより、 内針 5のプロテク夕 8の基端方向への移動をより円 滑に行うことができる。 That is, the shutter member 85 is formed by bending the vicinity of the proximal end 871 of the second portion 87 toward the inner needle 5 (toward the center axis direction of the protection body 81) as a friction reducing means. It has a bent portion 872 formed in a big tail shape. As shown in FIG. 14, when the shirt evening member 85 is in the first position, the bent portion 872 abuts on the outer peripheral surface of the inner needle 5 and the frictional resistance against the outer peripheral surface of the inner needle 5 ( Sliding resistance). Thereby, the inner needle 5 can be more smoothly moved in the proximal direction of the protection sheath 8.
なお、 折り曲げ部 8 7 2は、 図 1 4中に記載される右回りでなく、 左回りに形 成されたものであってもよい。  Note that the bent portion 872 may be formed not in the clockwise direction shown in FIG. 14 but in the counterclockwise direction.
また、 折り曲げ部 8 7 2は、 内釙 5の外周面との摩擦抵抗 (摺動抵抗) を低減 することができるものであれば、 図示のものに限定されることはなく、 例えば、 V字状、 U字状等いかなる形状に形成されていてもよい。  The bent portion 872 is not limited to the one shown in the drawing as long as it can reduce the frictional resistance (sliding resistance) with the outer peripheral surface of the inner rim 5. Shape, U-shape, etc.
<第 8実施形態 >  <Eighth embodiment>
次に、 本発明の留置針組立体の第 8実施形態について説明する。  Next, an indwelling needle assembly according to an eighth embodiment of the present invention will be described.
図 1 5は、 第 8実施形態の留置釙組立体が備えるシャツ夕一部材の第 2の部位 の端部の構成を示す拡大縦断面図である。 以下、 図 1 5に示す留置針組立体 1に ついて、 前記第 1および第 3実施形態との相違点を中心に説明し、 同様の事項に ついては、 その説明を省略する。  FIG. 15 is an enlarged longitudinal sectional view showing the configuration of the end of the second portion of the shirt evening member provided in the indwelling body assembly according to the eighth embodiment. Hereinafter, the indwelling needle assembly 1 shown in FIG. 15 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
第 8実施形態の留置針組立体 1では、 シャッタ一部材 8 5の構成が異なってい ること以外は、 前記第 1実施形態と同様である。  The indwelling needle assembly 1 of the eighth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
すなわち、 シャッター部材 8 5は、 摩擦低減手段として、 第 2の部位 8 7の基 端 8 7 1付近を面取り加工することにより形成した面取り部 8 7 3を有して いる。  That is, the shutter member 85 has a chamfered portion 873 formed by chamfering the vicinity of the base end 871 of the second portion 87 as friction reducing means.
面取り部 8 7 3は、 図 1 5に示すように、 シャツ夕一部材 8 5が第 1の姿勢に あるとき、 内針 5の外周面に当接し、 内針 5の外周面との摩擦抵抗 (摺動抵抗) を低減している。 これにより、 内針 5のプロテク夕 8の基端方向への移動をより 円滑に行うことができる。 As shown in FIG. 15, when the shirt evening member 85 is in the first position, the chamfered portion 873 comes into contact with the outer peripheral surface of the inner needle 5 and the frictional resistance with the outer peripheral surface of the inner needle 5 is increased. (Sliding resistance) Has been reduced. Accordingly, the inner needle 5 can be more smoothly moved in the proximal direction of the protective sheath 8.
なお、 面取り部 8 7 3の表面は、 内釙 5との摺動抵抗をできるだけ滑らかにす るような処理が施されているのが好ましい。  Note that the surface of the chamfered portion 873 is preferably subjected to a treatment to make the sliding resistance with the inner surface 5 as smooth as possible.
く第 9実施形態〉  Ninth embodiment>
次に、 本発明の留置釙組立体の第 9実施形態について説明する。  Next, a ninth embodiment of the indwelling assembly according to the present invention will be described.
図 1 6は、 第 9実施形態の留置釙組立体が備えるプロチクタの先端側の構成を 示す縦断面図である。 以下、 図 1 6に示す留置針組立体 1 {こついて、 前記第 1お よび第 3実施形態との相違点を中心に説明し、 同様の事項については、 その説明 を省略する。  FIG. 16 is a vertical cross-sectional view showing a configuration of a distal end side of a protector included in the indwelling device assembly according to the ninth embodiment. Hereinafter, the indwelling needle assembly 1 shown in FIG. 16 will be described focusing on differences from the first and third embodiments, and the description of the same matters will be omitted.
第 9実施形態の留置釙組立体 1では、 シャッター部材 8 5の構成が異なってい ること以外は、 前記第 1実施形態と同様である。  The indwelling assembly 1 according to the ninth embodiment is the same as the first embodiment except that the configuration of the shutter member 85 is different.
すなわち、 シャツ夕一部材 8 5は、 第 1の部位 8 6と、 第 1の部位 8 6に対し 湾曲する湾曲部 (連結部) 8 8 ' を介して存在する第 2の部位 8 7とを備え、 全 体として略 U字状に形成されている。  That is, the shirt evening member 85 includes a first portion 86 and a second portion 87 that is present via a curved portion (connecting portion) 88 ′ that curves with respect to the first portion 86. As a whole, it is formed in a substantially U-shape.
このような構成によっても、 シャツ夕一部材 8 5は、 第 1の姿勢から第 2の姿 勢への復元がより確実になされる。  Even with such a configuration, the shirt evening member 85 can be more reliably restored from the first posture to the second posture.
この湾曲部 8 8 ' の曲率半径 (平均) としては、 特に限定されないが、 例 えば、 1 . O mm以下であるのが好ましく、 0 . 1 2〜0 . 5 mm程度であるの がより好ましい。 湾曲部 8 8 ' の曲率半径が前記の上限値より大きいと、 シャツ 夕一部材 8 5は、 第 1の姿勢 (図 1 6に示す姿勢) のとき、 十分に圧縮された状 態にすることができない、 すなわち、 たわみ量が小さくなる場合がある。 く第 1 0実施形態 > The radius of curvature (average) of the curved portion 88 'is not particularly limited, but is, for example, preferably 1.0 mm or less, more preferably 0.12 to 0.5 mm. . If the radius of curvature of the curved portion 8 8 ′ is larger than the upper limit, the shirt evening member 85 should be in a sufficiently compressed state in the first position (the position shown in FIG. 16). May not be possible, that is, the amount of deflection may be small. 10th Embodiment>
次に、 本発明の留置針組立体の第 1 0実施形態について説明する。  Next, a tenth embodiment of the indwelling needle assembly of the present invention will be described.
図 1 7は、 第 1 0実施形態の留置針組立体 (シャッター部材の第 1の姿勢) を 示す縦断面図であり、 図 1 8は、 第 1 0実施形態の留置針組立体 (シャツ夕一部 5 材の第 2の姿勢) を示す縦断面図である。 以下、 図 1 7および図 1 8に示す留置 針組立体 1について、 前記第 1実施形態との相違点を中心に説明し、 同様の事項 , については、 その説明を省略する。  FIG. 17 is a longitudinal sectional view showing the indwelling needle assembly (first posture of the shutter member) of the tenth embodiment. FIG. FIG. 4 is a longitudinal sectional view showing a second posture of five parts. Hereinafter, the indwelling needle assembly 1 shown in FIGS. 17 and 18 will be described focusing on differences from the first embodiment, and the description of the same items will be omitted.
第 1 0実施形態の留置針組立体 1では、 離脱阻止手段の構成が異なっているこ と以外は、 前記第 1実施形態と同様である。 The indwelling needle assembly 1 of the tenth embodiment is the same as the first embodiment except that the configuration of the detachment preventing means is different.
0 以下、 第 1 0実施形態の離脱阻止手段 9 bの構成について説明する。 Hereinafter, the configuration of the separation prevention means 9b of the tenth embodiment will be described.
内針 5は、 針先 5 1付近とそれより基端側の部分との横断面形状が異なってい る。 すなわち、 内針 5は、 変化部分 (第 1の係合部) 9 4を境に、 先端側と基端 側とで、 その横断面形状が異なっている。  The inner needle 5 has a different cross-sectional shape between the vicinity of the needle tip 51 and a portion closer to the base end side. That is, the inner needle 5 has a different cross-sectional shape between the distal end side and the proximal end side with respect to the changing portion (first engagement portion) 94.
内釙 5は、 変化部分 9 4より、 先端側の部分の横断面形状が偏平状をなし、 基 端側の部分の横断面形状がほぼ円形をなしている。 以下、 内釙 5の変化部分 9 4 より先端側の部分を、 「偏平部 5 2」 と言い、 内釙 5の変化部分 9 4より基端側 の部分を、 「非偏平部 5 3」 と言う。 内針 5の先端側に偏平部 5 2が設けられる と内針に血液が入ったときに、 より視認しゃすいという利点がある。  The inner wall 5 has a flattened cross-sectional shape at the distal end portion and a substantially circular cross-sectional shape at the proximal end portion from the changed portion 94. Hereinafter, the portion on the distal side from the changing portion 94 of the inner portion 5 is referred to as “flat portion 52”, and the portion on the proximal side from the changing portion 94 of the inner portion 5 is referred to as “non-flat portion 53”. To tell. When the flat portion 52 is provided on the distal end side of the inner needle 5, there is an advantage that when the blood enters the inner needle, the blood becomes more visible.
この内針 5の横断面形状を変化させる方法 (偏平部 5 2の形成方法) は、 研削 加工 (削り) でもよいが、 曲げ、 プレス、 打ち抜き等の塑性加工によるものが好 ましい。 塑性加工によれば、 内針 5 (偏平部 5 2 ) の管壁の肉厚を周方向にほぼ 一定に保持しつつ、 内針 5を変形させることができる。 このため、 内針 5は、 そ の強度が好適に保持される。 The method of changing the cross-sectional shape of the inner needle 5 (the method of forming the flat portion 52) may be grinding (cutting), but is preferably performed by plastic working such as bending, pressing, or punching. According to the plastic working, the inner needle 5 can be deformed while the wall thickness of the tube wall of the inner needle 5 (flat portion 52) is kept substantially constant in the circumferential direction. Therefore, the inner needle 5 Is suitably maintained.
一方、 プロテク夕 8 (プロテク夕本体 8 1 ) の針体通路 8 2内には、 管状 体 8 9が、 例えば、 嵌合、 螺合、 力シメ、 融着、 接着剤による接着等により、 固 着 (固定) されている。 これにより、 釙体通路 8 2と管状体 8 9との境界部 には、 段差部 (第 2の係合部) 9 5が形成されている。  On the other hand, in the needle body passageway 82 of the protector body 8 (protector body body 81), a tubular body 89 is fixed by, for example, fitting, screwing, force crimping, fusion, bonding with an adhesive, or the like. Wearing (fixed). As a result, a step portion (second engagement portion) 95 is formed at the boundary between the body passage 82 and the tubular body 89.
管状体 8 9の構成材料としては、 特に限定されないが、 例えば、 樹脂材料、 金 属材料、 繊維材料、 ガラス材料、 セラミックス材料等が挙げられる。  The constituent material of the tubular body 89 is not particularly limited, and examples thereof include a resin material, a metal material, a fiber material, a glass material, and a ceramic material.
この管状体 8 9の内径 rは、 非偏平部 5 3の外径とほぼ等しいか、 あるいは、 若干大きい値に設定されている (図 1 7参照) 。  The inner diameter r of the tubular body 89 is set substantially equal to or slightly larger than the outer diameter of the non-flat portion 53 (see FIG. 17).
偏平部 5 2は、 前述したように、 偏平な形状をなしている。 このため、 プロテ クタ 8 (プロテク夕本体 8 1 ) が内釙 5の針先 5 1を収納した (覆った) 状態か ら、 プロテク夕 8を内針 5に対して先端方向へ移動しょうとすると、 段差部 9 5 が変化部分 9 4に係合し、 変化部分 9 4は、 管状体 8 9の内腔部を通過すること ができない (図 1 8参照) 。 これにより、 プロテク夕 8が内針 5の針先 5 1から 外れる (離脱する) のが阻止される。 このような変化部分 9 4と段差部 9 5 とで、 離脱阻止手段 9 bが構成される。  The flat portion 52 has a flat shape as described above. For this reason, if the protector 8 (protector body 8 1) is in a state where the needle tip 51 of the inner needle 5 is stored (covered), and the protector 8 is moved toward the tip of the inner needle 5 in the distal direction. However, the stepped portion 95 engages with the change portion 94, and the change portion 94 cannot pass through the lumen of the tubular body 89 (see FIG. 18). This prevents the protector 8 from coming off (withdrawing) from the needle tip 51 of the inner needle 5. The changing portion 94 and the step portion 95 constitute the separation preventing means 9b.
また、 偏平部 5 2の外径 (最大外径) を Rとし、 管状体 8 9の内径 (平均) を rとしたとき、 RZ rが、 例えば、 1 . 0 2〜1 . 3 0程度の関係を満足するの が好ましく、 1 . 0 4〜1 . 2 0程度の関係を満足するのがより好ましい。 前記 下限値未満の場合、 管状体 8 9の構成材料等によっては、 離脱阻止手段 9 bの機 能が十分に発揮されないことがある。 一方、 前記上限値を超えると、 管状体 8 9 の寸法によっては、 偏平部 5 2の外径が大きくなり過ぎ、 内針 5の血管への穿刺 に際して、 患者の負担が増大する場合がある。 When the outer diameter (maximum outer diameter) of the flat portion 52 is R and the inner diameter (average) of the tubular body 89 is r, RZr is, for example, about 1.02 to 1.30. Preferably, the relationship is satisfied, and more preferably, a relationship of about 1.04 to 1.20 is satisfied. If the value is less than the lower limit, the function of the separation preventing means 9b may not be sufficiently exhibited depending on the constituent material of the tubular body 89 and the like. On the other hand, if the upper limit is exceeded, the outer diameter of the flat portion 52 becomes too large depending on the dimensions of the tubular body 89, and the inner needle 5 punctures the blood vessel. In this case, the burden on the patient may increase.
このような構成とすることによつても、 前記第 1実施形態と同様の作用 ·効果 が生じる。  With such a configuration, the same operation and effect as those of the first embodiment are produced.
また、 変化部分 9 4および段差部 9 5は、 それぞれ、 内針 5およびプロテク夕 8に形成されているため、 構成が簡単であり、 部品点数の増大もなく、 小型化、 細径化に寄与する。  In addition, since the changing portion 94 and the step portion 95 are formed on the inner needle 5 and the protector 8, respectively, the configuration is simple, there is no increase in the number of parts, and the size and diameter are reduced. I do.
なお、 管状体 8 9は、 プロテク夕本体 8 1と一体的に形成されていてもよ い。 ■  Note that the tubular body 89 may be formed integrally with the protection body 81. ■
<第 1 1実施形態〉  <Eleventh embodiment>
次に、 本発明の留置針組立体の第 1 1実施形態について説明する。  Next, a first embodiment of the indwelling needle assembly of the present invention will be described.
図 1 9は、 第 1 1実施形態の留置針組立体 (シャッター部材の第 1の姿勢) を 示す縦断面図であり、 図 2 0は、 第 1 1実施形態の留置針組立体 (シャツ夕一部 材の第 2の姿勢) を示す縦断面図である。 以下、 図 1 9および図 2 0に示す留置 釙組立体 1について、 前記第 1実施形態との相違点を中心に説明し、 同様の事項 については、 その説明を省略する。  FIG. 19 is a longitudinal sectional view showing the indwelling needle assembly (first attitude of the shutter member) of the eleventh embodiment. FIG. FIG. 4 is a longitudinal sectional view showing a second posture of some materials). Hereinafter, the indwelling assembly 1 shown in FIGS. 19 and 20 will be described focusing on differences from the first embodiment, and the description of the same matters will be omitted.
第 1 1実施形態の留置釙組立体 1では、 離脱阻止手段の構成が異なっているこ と以外は、 前記第 1実施形態と同様である。  The indwelling assembly 1 of the eleventh embodiment is the same as the first embodiment except that the configuration of the separation preventing means is different.
以下、 第 1 1実施形態の離脱阻止手段 9 cの構成について説明する。  Hereinafter, the configuration of the separation prevention means 9c of the first embodiment will be described.
内針ハブ 6には、 その先端部に、 凹部 6 3の開口を塞ぐようにして平板状の蓋 部材 6 4が設置され、 後述するヒモ 9 6を収納する収納空間 6 5が形成されてお り、 穿刺操作等に際して、 ヒモ 9 6が邪魔になることがない。  At the tip of the inner needle hub 6, a flat lid member 64 is installed so as to close the opening of the concave portion 63, and a storage space 65 for storing a string 96 described later is formed. In the puncture operation, the string 96 does not interfere.
蓋部材 6 4には、 ほぼ中央部に内針 5が揷通される孔 6 4 1と、 この孔 6 4 1 から外方にズレた位置にヒモ (線状または帯状をなす連結部材) 9 6が挿通され る孔 6 4 2とが、 それぞれ、 蓋部材 6 4を貫通して形成されている。 The cover member 6 4 has a hole 6 4 1 through which the inner needle 5 is inserted substantially in the center, and a hole 6 4 1 Holes 62 through which a string (a linear or band-shaped connecting member) 96 is inserted are formed through the lid member 64 at positions shifted outward from the lid member 64.
ヒモ 9 6は、 その先端部がプロテク夕 8 (プロテクタ本体 8 1 ) に埋入するよ うにして固着 (固定) されているが、 その基端部 (内釙ハブ 6側の端部) は、 内 針ハブ 6に固着 (固定) されていない。  The string 96 is fixed (fixed) so that its distal end is embedded in the protector body 8 (protector body 81), but its base end (the end on the inner hub 6 side) is It is not fixed (fixed) to the inner needle hub 6.
ヒモ 9 6の基端部には、 ?し 6 4 2の基端側縁部に係止して、 ヒモ 9 6が内釙ハ ブ 6から外れるのを防止する係止部 9 6 1が設けられている。 この係止部 9 6 1 は、 例えば、 ヒモ 9 6を結んだり、 塊状 (例えば、 球状等) の部材をヒモ 9 6に 固着 (例えば、 融着、 接着等) したり等することにより形成することができる。 ヒモ 9 6の基端部をプロテク夕本体 8 1に固定しないことで、 ヒモ 9 6の折り ' 曲げを最小限にして収納空間 6 5に収納することができるため、 ヒモ 9 6の変形 を防ぎ、 かつヒモ 9 6を孔 6 4 2からスムーズに延ばすことができる。  At the base of string 96,? A locking portion 961 is provided that is locked to the base end side edge of the hub 642 to prevent the string 96 from coming off the inner hub 6. The locking portion 961 is formed by, for example, tying a string 96 or fixing (eg, fusing, bonding, etc.) a massive (eg, spherical) member to the string 96. be able to. By not fixing the base end of the string 96 to the protector body 81, the string 96 can be stored in the storage space 65 with a minimum amount of bending, preventing deformation of the string 96. The string 96 can be smoothly extended from the hole 642.
ヒモ 9 6の構成材料としては、 特に限定されないが、 例えば、 ポリエチレン等 のポリオレフイン、 ポリ塩化ビニル、 ポリウレタン、 ポリブチレンテレフ夕レー ト等のポリエステル等の樹脂材料、 木綿等の繊維材料、 各種金属材料等が挙げら れる。  The constituent material of the string 96 is not particularly limited, but, for example, resin materials such as polyolefin such as polyethylene, polyvinyl chloride, polyurethane, polyester such as polybutylene terephthalate, fiber materials such as cotton, and various metal materials And the like.
このようなヒモ 9 6は、 上記材料等による単繊維または繊維の集合体 (例 えば、 単繊維を蹉つたもの、 単繊維を織ったもの等) 、 不織布、 あるいは、 フィ ルム等の形状にして用いることができる。  Such a string 96 may be formed into a single fiber or an aggregate of fibers (for example, a single fiber broken or a single fiber woven), a nonwoven fabric, or a film made of the above-mentioned materials. Can be used.
留置針組立体 1の組み立て状態では (プロテク夕 8を内針ハブ 6に接近させた とき) 、 ヒモ 9 6は、 弛緩した状態で折りたたまれ、 収納空間 6 5内 (内釙ハブ 6内) に収納されている (図 1 9参照) 。 プロテク夕 8 (プロテクタ本体 8 1 ) が内針 5の針先 5 1を収納した (覆った) 状態では、 ヒモ 9 6は、 伸張した状態 どなる。 この時プロテク夕 8を内針 5に対して先端方向へ移動しょうとすると、 係止部 9 6 1が蓋部材 9 4の孔 9 4 2の基端側縁部に係止し、 孔 9 4 2を通過す ることができない (図 2 0参照) 。 これにより、 プロテク夕 8が内針 5の釙先 5 1から外れる (離脱する) のが阻止される。 このようなヒモ 9 6で、 離脱阻止手 段 9 cが構成される。 In the assembled state of the indwelling needle assembly 1 (when the protector 8 is brought closer to the inner needle hub 6), the string 96 is folded in a relaxed state, and is stored in the storage space 65 (inner hub 6). It is stored (see Figure 19). Protect evening 8 (Protector body 8 1) In a state where the needle tip 51 of the inner needle 5 is stored (covered), the string 96 is in an extended state. At this time, if the protector 8 is to be moved in the distal direction with respect to the inner needle 5, the locking portion 961 is locked to the base end side edge of the hole 942 of the lid member 94, and the hole 94 2 (see Figure 20). This prevents the protector 8 from coming off (withdrawing) from the tip 51 of the inner needle 5. Such a string 96 constitutes a separation prevention means 9c.
ヒモ 9 6の長さとしては、 プロテク夕 8が内針 5の針先 5 1を収納した状 態で、 僅かに弛みが残る程度に設定されているのが好ましい。 これにより、 針先 5 1がプロテクタ 8内 収納され確実にシャツ夕一部材 8 5が第 2の姿勢となつ た後にヒモ 9 6が離脱阻止手段としての効果を発揮することができる。 すな わち、 プロテク夕 8を確実に釙先 5 1に固定することができる。  It is preferable that the length of the string 96 is set to such a degree that the slack remains slightly when the protector 8 houses the needle tip 51 of the inner needle 5. Thus, the needle 96 can be stored in the protector 8 and the strap 96 can exhibit the effect as a separation preventing means after the shirt evening member 85 is securely in the second posture. That is, the protector 8 can be securely fixed to the tip 51.
このような構成とすることによつても、 前記第 1実施形態と同様の作用 '効果 が生じる。  With such a configuration, the same operation and effect as those of the first embodiment are obtained.
なお、 収納空間 6 5は、 内針ハブ 6に代わり、 プロテクタ 8 (プロテク夕本体 8 1 ) に形成されていても、 内釙八ブ 6とプロテク夕 8とめ双方に形成されてい てもよい。  The storage space 65 may be formed in the protector 8 (protector body 8 1) instead of the inner needle hub 6, or may be formed in both the inner cover 6 and the protector 8.
以上、 本発明の穿刺具および留置針組立体を図示の各実施形態について説明し たが、 本発明は、 これらに限定されるものではなく、 留置針組立体を構成する各 部は、 同様の機能を発揮し得る任意の構成のものと置換することができる。 また、 本発明の穿刺具および留置針組立体は、 前記第 1〜第 1 1実施形態のう ちの、 任意の 2以上の構成を組み合わせたものであってもよい。  As described above, the puncture device and the indwelling needle assembly of the present invention have been described with reference to the illustrated embodiments. However, the present invention is not limited to these embodiments. It can be replaced with any configuration that can exhibit the function. Further, the puncture device and the indwelling needle assembly of the present invention may be a combination of any two or more of the first to eleventh embodiments.
また、 前述した連結部は、 第 1の部位および第 2の部位と一体的に、 板部材を 屈曲または湾曲することにより形成したものであつたが、 これに限定されること はなく、 それぞれが板部材で構成される第 1の部位および第 2の部位の先端部同 士を、 例えば、 ネジ、 ピン、 力シメ、 嵌合、 接着、 融着、 溶接、 ろう接等で固定 またはバネ等で連結することにより設けられたものであってもよい。 産業上の利用可能性 In addition, the above-described connecting portion integrally forms the plate member with the first portion and the second portion. Although formed by bending or bending, the present invention is not limited to this. For example, the first portion and the second portion each formed of a plate member may have the same distal end, such as a screw. , Pins, force crimping, fitting, adhesion, fusion, welding, brazing, or the like, or may be provided by being connected by a spring or the like. Industrial applicability
以上述べたように、 本発明によれば、 シャッター部材の曲がりグセが付き 難く、 長期間保管しても十分な復元力 (機能) を有しているので、 シャッター部 材が確実に作動する。 よって、 一旦プロテク夕内に収納された針先が再度プロテ クタの先端から突出するのが確実に防止され、 廃棄処理等に際し安全性が高 As described above, according to the present invention, the shutter member does not easily bend and has a sufficient restoring force (function) even when stored for a long period of time, so that the shutter member operates reliably. Therefore, the needle tip once stored in the protector is reliably prevented from protruding from the tip of the protector again, and the safety is high in disposal processing.
'い。 'Yes.
特に、 シャッター部材の形状を適宜選択することにより、 その復元力をより確 実に向上させることができる。  In particular, by appropriately selecting the shape of the shutter member, the restoring force can be more reliably improved.
また、 離脱阻止手段を設けた場合には、 一旦覆った釙先からプロテク夕が外れ る (離脱する) ことが防止される。  In addition, when the detachment prevention means is provided, it is possible to prevent the protector from coming off (withdrawing) from the tip once covered.

Claims

請 求 の 範 囲 The scope of the claims
1 . 先端に針先を有する針体と、 前記針体の基端部に設けられたハブと、 前記針 先を覆うプロテク夕とを有する穿刺具であって、 1. A puncture device having a needle body having a needle tip at a distal end, a hub provided at a base end of the needle body, and a protector covering the needle tip,
前記プロテク夕は、 前記針体を揷通可能な針体通路を有するプロテク夕本体 と、  A protection body having a needle body passage through which the needle body can pass;
前記釙体が前記針体通路に揷通可能な第 1の姿勢と前記釙体の針先の通過を阻 止する第 2の姿勢とに変位可能なシャツ夕一部材とを有し、  A shirt member that is displaceable between a first position in which the body can pass through the needle passage and a second position that prevents passage of the needle point of the body;
前記シャッター部材は、 第 1の部位と、 前記第 1の部位に対し連結部を介して 存在する第 2の部位とを備え、 前記第 1の部位の前記連結部と反対側の端部と、 前記第 2の部位の前記連結部と反対側の端部との距離が、 前記第 1の姿勢と前記 第 2の姿勢とで変ィヒするように構成されていることを特徴とする穿刺具。  The shutter member includes a first portion, and a second portion present via a connecting portion to the first portion, and an end of the first portion opposite to the connecting portion, A puncture device wherein a distance between an end of the second portion and the end opposite to the connecting portion varies between the first posture and the second posture. .
2 . 前記シャッタ一部材は、 前記第 1の部位および/または前記第 2の部位の少 なくとも一部が弾性的に変形することにより、 前記距離が変化するよう構成され ている請求項 1に記載の穿刺具。 2. The shutter member according to claim 1, wherein the distance is changed by elastically deforming at least a part of the first part and / or the second part. The puncture device described.
3 . 前記第 1の部位または前記第 2の部位の少なくとも一方は、 他方に向かって 突出する突出部を有する請求項 1または 2に記載の穿刺具。  3. The puncture device according to claim 1, wherein at least one of the first portion and the second portion has a protrusion protruding toward the other.
4. 前記突出部は、 前記第 1の部位および Zまたは前記第 2の部位を湾曲または 屈曲させることにより形成したものである請求項 3に記載の穿剌具。  4. The piercing device according to claim 3, wherein the protruding portion is formed by bending or bending the first portion and the Z or the second portion.
5 . 前記シャッター部材は、 前記針体通路の途中に形成された空間内に設置 され、 前記第 2の部位は、 前記第 1の姿勢のときに、 前記連結部と反対側の端部 が前記釙体の外周面に当接している請求項 1ないし 4のいずれかに記載の穿 剌具。 5. The shutter member is installed in a space formed in the middle of the needle body passage, and the second portion has an end opposite to the connecting portion when in the first posture. The punch according to any one of claims 1 to 4, which is in contact with the outer peripheral surface of the body. Stimulator.
6 . 前記第 1の部位および前記第 2の部位は、 前記第 2の姿勢のときに、 前記連 結部と反対側の端部が、 それぞれ、 前記プロテク夕本体の内面に当接するよう構 成されている請求項 1ないし 5のいずれかに記載の穿刺具。  6. The first part and the second part are configured such that, when in the second posture, ends opposite to the connection part abut against an inner surface of the protection body, respectively. The puncture device according to any one of claims 1 to 5, wherein the puncture device is a puncture device.
7 . 前記第 1の部位の前記連結部と反対側の端部、 前記第 2の部位の前記連結部 と反対側の端部および前記連結部付近は、 前記第 2の姿勢のときに、 それぞれ、 前記プロテク夕本体の内面に当接するよう構成されている請求項 1ないし 5のい ずれかに記載の穿剌具。 7. The end of the first portion opposite to the connection portion, the end of the second portion opposite to the connection portion, and the vicinity of the connection portion are each in the second posture, The puncture device according to any one of claims 1 to 5, wherein the puncture device is configured to contact an inner surface of the protector body.
8 . 前記第 1の部位は、 前記連結部と反対側め端部に、 前記プロテクタ本体の内 面との接触面積を増大する接触面積増大手段を有する請求項 6または 7に記載の 穿刺具。  8. The puncture device according to claim 6, wherein the first portion has a contact area increasing means for increasing a contact area with an inner surface of the protector main body at an end opposite to the connecting portion.
9 . 前記接触面積増大手段は、 前記第 1の部位の前記連結部と反対側の端部を、 折り曲げることにより形成された折り曲げ部で構成されている請求項 8に記載の 穿刺具。  9. The puncture device according to claim 8, wherein the contact area increasing means includes a bent portion formed by bending an end of the first portion opposite to the connection portion.
1 0 . 前記第 1の部位は、 前記連結部と反対側の端部が前記プロテク夕本体に固 定されている請求項 1ないし 5のいずれかに記載の穿刺具。 10. The puncture device according to any one of claims 1 to 5, wherein the first portion has an end opposite to the connecting portion fixed to the protector body.
1 1 . 前記第 2の部位は、 前記連結部と反対側の端部に、 前記釙体の外周面との 摩擦抵抗を低減する摩擦低減手段を有する請求項 1ないし 1 0のいずれかに記載 の穿剌具。  11. The second portion according to any one of claims 1 to 10, wherein the second portion has, at an end opposite to the connecting portion, a friction reducing unit configured to reduce frictional resistance with an outer peripheral surface of the body. Piercing tool.
1 2 . 前記摩擦低減手段は、 前記第 2の部位の前記連結部と反対側の端部を、 折 り曲げることにより形成された折り曲げ部または面取り加工することにより形成 された面取り部で構成されている請求項 1 1に記載の穿刺具。 12. The friction reducing means includes a bent portion formed by bending an end of the second portion opposite to the connection portion or a chamfered portion formed by chamfering. The puncture device according to claim 11, wherein
13. 前記連結部は、 V字状に屈曲する屈曲部で構成されている請求項 1ないし 12のいずれかに記載の穿刺具。 13. The puncture device according to any one of claims 1 to 12, wherein the connecting portion is configured by a bent portion bent in a V shape.
14. 前記連結部は、 湾曲する湾曲部で構成され、 その曲率半径 (平均) が 1. 0 mm以下である請求項 1ないし 12のいずれかに記載の穿刺具。  14. The puncture device according to any one of claims 1 to 12, wherein the connecting portion is formed by a curved portion having a radius of curvature (average) of 1.0 mm or less.
15. 前記シャッター部材は、 帯状の板部材で構成され、 その厚さが 0. 04〜 0. 2 mmである請求項 1ないし 14のいずれかに記載の穿刺具。 15. The puncture device according to claim 1, wherein the shutter member is formed of a band-shaped plate member, and has a thickness of 0.04 to 0.2 mm.
16. 前記シャツ夕一部材は、 その表面に潤滑剤;^付与されている請求項 1ない し 15のいずれかに記載の穿剌具。  16. The piercing device according to any one of claims 1 to 15, wherein the evening shirt member is provided with a lubricant on its surface.
17. 前記プロテク夕が前記針体の針先を覆った状態で、 前記プロテクタが前記 針体の前記針先から離脱するのを阻止する離脱阻止手段を有する請求項 1ないし 17. A disengagement preventing means for preventing the protector from detaching from the needle tip of the needle body when the protector covers the needle tip of the needle body.
16のいずれかに記載の穿剌具。 ,A piercing implement according to any one of 16 above. ,
18. 前記針体は、 管状の内針であり、 前記ハブは、 内釙ハブである請求項 1な いし 17のいずれかに記載の穿剌具。 18. The piercing device according to claim 1, wherein the needle body is a tubular inner needle, and the hub is an inner hub.
19. 請求項 18に記載の穿刺具と、  19. a puncture device according to claim 18,
前記内針が挿入可能な中空の外針と、  A hollow outer needle into which the inner needle can be inserted,
前記外針の基端に設置された外針ハブとを有することを特徴とする留置針組立 体。  An indwelling needle assembly comprising: an outer needle hub installed at a base end of the outer needle.
20. 前記プロテク夕と前記外針ハブとが嵌合可能な請求項 19に記載の留置釙 組立体。  20. The indwelling assembly according to claim 19, wherein the protector and the outer needle hub can be fitted.
PCT/JP2001/004942 2000-06-12 2001-06-12 Puncturer and self-retaining needle assembly WO2001095958A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000-175172 2000-06-12
JP2000175172 2000-06-12
JP2001-137716 2001-05-08
JP2001137716A JP4942256B2 (en) 2000-06-12 2001-05-08 Puncture and indwelling needle assembly

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EP2133109A1 (en) * 2007-03-30 2009-12-16 Terumo Kabushiki Kaisha Indwelling needle assembly
US10625054B2 (en) 2014-04-18 2020-04-21 Becton, Dickinson And Company Needle capture safety interlock for catheter
CN114404733A (en) * 2021-12-22 2022-04-29 王子航 Medical injector and use method thereof
US11511052B2 (en) 2014-11-10 2022-11-29 Becton, Dickinson And Company Safety IV catheter with V-clip interlock and needle tip capture
US11534581B2 (en) 2013-06-07 2022-12-27 Becton, Dickinson And Company Ported IV catheter having external needle shield and internal blood control septum

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EP2133109A1 (en) * 2007-03-30 2009-12-16 Terumo Kabushiki Kaisha Indwelling needle assembly
EP2133109A4 (en) * 2007-03-30 2014-10-15 Terumo Corp Indwelling needle assembly
US11534581B2 (en) 2013-06-07 2022-12-27 Becton, Dickinson And Company Ported IV catheter having external needle shield and internal blood control septum
US10960186B2 (en) 2014-04-18 2021-03-30 Becton, Dickinson And Company Multi-use blood control safety catheter assembly
US10780249B2 (en) 2014-04-18 2020-09-22 Becton, Dickinson And Company Needle capture safety interlock for catheter
US10799682B2 (en) 2014-04-18 2020-10-13 Becton, Dickinson And Company Needle capture safety interlock for catheter
US10729890B2 (en) 2014-04-18 2020-08-04 Becton, Dickinson And Company Multi-use blood control safety catheter assembly
US11504505B2 (en) 2014-04-18 2022-11-22 Becton, Dickinson And Company Needle capture safety interlock for catheter
US10625054B2 (en) 2014-04-18 2020-04-21 Becton, Dickinson And Company Needle capture safety interlock for catheter
US11565088B2 (en) 2014-04-18 2023-01-31 Becton, Dickinson And Company Multi-use blood control safety catheter assembly
US11607530B2 (en) 2014-04-18 2023-03-21 Becton, Dickinson And Company Needle capture safety interlock for catheter
US11931532B2 (en) 2014-04-18 2024-03-19 Becton, Dickinson And Company Multi-use blood control safety catheter assembly
US11511052B2 (en) 2014-11-10 2022-11-29 Becton, Dickinson And Company Safety IV catheter with V-clip interlock and needle tip capture
CN114404733A (en) * 2021-12-22 2022-04-29 王子航 Medical injector and use method thereof
CN114404733B (en) * 2021-12-22 2023-07-04 王子航 Medical injector

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