WO2011122486A1 - Extension wire and guide wire - Google Patents

Extension wire and guide wire Download PDF

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Publication number
WO2011122486A1
WO2011122486A1 PCT/JP2011/057415 JP2011057415W WO2011122486A1 WO 2011122486 A1 WO2011122486 A1 WO 2011122486A1 JP 2011057415 W JP2011057415 W JP 2011057415W WO 2011122486 A1 WO2011122486 A1 WO 2011122486A1
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WO
WIPO (PCT)
Prior art keywords
wire
extension
extension wire
end portion
braided
Prior art date
Application number
PCT/JP2011/057415
Other languages
French (fr)
Japanese (ja)
Inventor
大 秋友
Original Assignee
テルモ株式会社
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 テルモ株式会社 filed Critical テルモ株式会社
Publication of WO2011122486A1 publication Critical patent/WO2011122486A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M25/0905—Guide wires extendable, e.g. mechanisms for extension
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids

Definitions

  • the present invention relates to an extension wire and a guide wire for extending a wire such as a guide wire.
  • Guidewires can be used to treat difficult sites such as PTCA (Percutaneous Transluminal Coronary Angioplasty), or for the purpose of minimally invasive treatment of the human body, cardiovascular Used to guide catheters used for imaging and other examinations.
  • a guide wire used for PTCA surgery is inserted to the vicinity of the target vascular stenosis portion together with the balloon catheter with the tip of the guide wire protruding from the tip of the balloon catheter. Guide to near.
  • a stenosis occlusion
  • a blood vessel such as femoral, iliac, linal, shunt, etc.
  • the tip of the balloon catheter is guided to the vicinity of the vascular stenosis using a guide wire.
  • the catheter may be exchanged during procedures such as PTCA and PTA.
  • the distal end portion of the extension wire is connected to the proximal end portion of the guide wire inserted into the lumen of the catheter, and the guide wire is extended. Then, the catheter is removed and replaced with a new catheter. Next, the extension wire is removed from the guide wire and the procedure is continued.
  • a sheath portion is provided at the proximal end portion of the guide wire, and a fitting portion that can be fitted into the sheath portion is provided at the distal end portion of the extension wire (for example, Patent Document 1).
  • the insertion part of an extension wire is inserted in the sheath part of a guide wire, and the extension wire is connected to a guide wire.
  • the extension wire connected to the guide wire is configured to be firmly connected to the sheath portion of the guide wire so that the extension wire is not unintentionally detached from the guide wire.
  • An object of the present invention is to provide an extension wire and a guide wire that can be easily and surely attached to and detached from the wire and prevent the extension wire connected to the wire from being unintentionally detached. It is in.
  • the present invention provides an extension wire connected to a proximal end portion of a guide wire, An extension wire body having flexibility; A connection portion provided on the distal end side of the extension wire body, The connecting portion is a tube that is movable or expandable relative to the extension wire body in the longitudinal direction of the extension wire body; It has a tubular shape and has a braided body formed in a net shape by intersecting linear bodies, The braided body is an extension wire configured to extend in the longitudinal direction to reduce the diameter and sandwich the proximal end portion of the guide wire.
  • a distal end portion of the braided body is fixed to the tube body, and a proximal end portion of the braided body is fixed to a distal end portion of the extension wire main body.
  • the distal end portion of the braided body is fixed to the inner surface of the tubular body in an expanded state, and the proximal end portion of the braided body is fixed in a contracted state. preferable.
  • the braided body expands in diameter when the tube body is moved in the proximal direction relative to the extension wire body, and the tube body extends in the distal direction relative to the extension wire body. It is preferable to reduce the diameter when moved.
  • the extension wire of the present invention connects the extension wire to the proximal end portion of the guide wire
  • the proximal end portion of the guide wire is inserted into the braided body
  • an inner diameter of the braided body is set larger than an outer diameter of the proximal end portion of the guide wire, and the guide is inserted into the braided body.
  • the braided body is preferably configured to expand in diameter when the proximal end portion of the wire is inserted.
  • the linear body is inclined with respect to the central axis of the braided body in a side view.
  • the braided body is preferably a blade wire.
  • the tube body is preferably extendable and provided so as to cover the braided body from the base end to the tip end.
  • the tube is made of a rubber material or a thermoplastic elastomer.
  • the present invention is a guide wire connected to the distal end portion of the extension wire, A flexible guide wire body; A connection portion provided on the proximal end side of the guide wire body, The connecting portion is a tube that is movable or expandable relative to the guidewire body in the longitudinal direction of the guidewire body; It has a tubular shape and has a braided body formed in a net shape by intersecting linear bodies, The braided body is a guide wire configured so as to be reduced in diameter by extending in a longitudinal direction thereof and to sandwich a distal end portion of the extension wire.
  • FIG. 1 is a longitudinal sectional perspective view showing a first embodiment of an extension wire according to the present invention.
  • FIG. 2 is a longitudinal sectional view showing the extension wire shown in FIG. 1 and a state in which the extension wire is connected to the guide wire.
  • FIG. 3 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
  • FIG. 4 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
  • FIG. 5 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
  • FIG. 6 is a longitudinal sectional perspective view showing a second embodiment of the extension wire of the present invention.
  • FIG. 7 is a longitudinal sectional view showing a third embodiment of the extension wire of the present invention.
  • FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the extension wire of the present invention.
  • FIG. 9 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
  • FIG. 10 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the action of the extension wire shown in FIG.
  • FIG. 11 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
  • extension wire and guide wire of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
  • FIG. 1 is a longitudinal sectional perspective view showing a first embodiment of an extension wire of the present invention
  • FIG. 2 is an extension wire shown in FIG. 1, and a longitudinal section showing a state in which the extension wire is connected to a guide wire.
  • FIGS. 3 to 5 are side views schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
  • the left side in FIGS. 1 to 5 is referred to as “tip”, the right side is “base end (rear end)”, the upper side is “upper”, and the lower side is “lower”.
  • the extension wire 1 shown in these drawings is detachably connected to a proximal end portion of a guide wire 100 such as a catheter guide wire used by being inserted into the lumen of a catheter (including an endoscope), for example,
  • the guide wire 100 is extended.
  • the extension wire 1 includes an extension wire main body 2 having flexibility, a tube body 5 provided on the distal end side of the extension wire main body 2, and a braided body 6.
  • the braided body 6 may be disposed in at least one of the tube body 5 and the extension wire main body 2, but in this embodiment, the braided body 6 is disposed in the extension wire main body 2 and the tube body 5.
  • the total length of the extension wire 1 is not particularly limited, but is preferably about 200 to 5000 mm.
  • the outer diameter of the extension wire 1 is not particularly limited, but is preferably about 0.2 to 1.2 mm.
  • the extension wire main body 2 has a flexible wire main body portion 3 and a cylindrical portion 4 fixed to the distal end portion of the wire main body portion 3.
  • the wire main-body part 3 and the cylindrical part 4 may be formed integrally.
  • the wire main body 3 includes a single continuous core wire (wire) 31 and a resin coating layer 32 that covers the core wire 31, and the cross-sectional shape of the core wire 31 and the wire main body 3. Is circular.
  • the core wire 31 is not limited to this, and a plurality of core wires (wire materials) made of the same or different materials may be joined (connected) by, for example, welding or brazing.
  • the wire main-body part 3 may have another structure (for example, other layer etc.), and the resin coating layer 32 may be abbreviate
  • the cross-sectional shape of the core wire 31 and the wire main-body part 3 is not limited to a circle.
  • the constituent material of the core wire 31 is not particularly limited.
  • various metal materials such as superelastic alloys such as stainless steel, Ni—Ti alloy, Ni—Al alloy, Cu—Zn alloy, A high-rigidity resin material can be used, and one or more of these can be used in combination.
  • the resin coating layer 32 is provided so as to cover all or part of the outer peripheral surface (outer surface) of the core wire 31.
  • the resin coating layer 32 may be provided on the cylindrical portion 4 or the tube body 5.
  • the resin coating layer 32 can be formed for various purposes.
  • the resin coating layer 32 may reduce friction (sliding resistance) of the extension wire 1 and improve slidability.
  • the resin coating layer 32 is preferably made of a material that can reduce friction as described below. Thereby, the frictional resistance (sliding resistance) with the inner wall of the catheter used together with the guide wire 100 and the extension wire 1 is reduced, and the slidability is improved.
  • materials that can reduce such friction include polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polyesters (PET, PBT, etc.), polyamides, polyimides, polyurethanes, polystyrenes, polycarbonates, silicone resins, fluorine resins ( PTFE, ETFE, etc.) or a composite material thereof.
  • polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polyesters (PET, PBT, etc.), polyamides, polyimides, polyurethanes, polystyrenes, polycarbonates, silicone resins, fluorine resins ( PTFE, ETFE, etc.) or a composite material thereof.
  • the frictional resistance (sliding resistance) between the extension wire 1 and the inner wall of the catheter is more effectively reduced, and the sliding property is improved. Can be improved.
  • the core wire 31 can be coated with the resin material heated by a method such as baking or spraying. Thereby, the adhesiveness between the core wire 31 and the resin coating layer 32 is particularly excellent.
  • the core wire can be formed without heating when forming the resin coating layer 32 (covering the core wire 31).
  • the resin coating layer 32 can be formed that adheres securely and firmly to 31. That is, when the resin coating layer 32 is made of a silicone resin (or a composite material containing the same), a reaction-curing material or the like can be used, and therefore the resin coating layer 32 is formed at room temperature. be able to. Thus, by forming the resin coating layer 32 at room temperature, coating can be easily performed.
  • the thickness of the resin coating layer 32 is not particularly limited, and is appropriately determined in consideration of the purpose of forming the resin coating layer 32, the constituent material, the forming method, and the like. Usually, the thickness (average) of the resin coating layer 32 is used. Is preferably about 1 to 100 ⁇ m, more preferably about 1 to 30 ⁇ m. If the thickness of the resin coating layer 32 is too thin, the purpose of forming the resin coating layer 32 may not be sufficiently exhibited, and the resin coating layer 32 may be peeled off. Moreover, when the thickness of the resin coating layer 32 is too thick, the physical characteristics of the core wire 31 may be affected, and the resin coating layer 32 may be peeled off.
  • the resin coating layer 32 may be a single layer or a laminate of two or more layers.
  • the outer peripheral surface (surface) of the core wire 31 is subjected to a treatment (roughening, chemical treatment, heat treatment, etc.) for improving the adhesion of the resin coating layer 32, or the resin coating layer 32 is adhered.
  • An intermediate layer that can improve the properties can also be provided.
  • the cylindrical portion 4 of the extension wire body 2 has a hollow portion that opens to the tip and accommodates the braided body 6.
  • the cylindrical portion 4 has a cylindrical shape, and a proximal end portion thereof is fixed to the outer peripheral surface of the distal end portion of the wire main body portion 3.
  • the fixing method of the wire main body part 3 and the cylindrical part 4 is not specifically limited, For example, fixing with solder (brazing material), fixing materials, such as an adhesive agent, welding, etc. are mentioned.
  • the constituent material of the cylindrical portion 4 is not particularly limited, and for example, the same materials as those exemplified as the constituent material of the core wire 31 described above can be used.
  • a cross section having a C shape may be used instead of the cylindrical portion 4, for example.
  • the tubular body 5 has a cylindrical shape in the illustrated configuration, and is installed so as to be relatively movable in the longitudinal direction of the extending wire body 2 with respect to the extending wire body 2, that is, the tubular portion 4. Yes.
  • the tubular body 5 includes an insertion portion 52 that can be inserted into the tubular portion 4, and a diameter-enlarged portion that is provided on the distal end side of the insertion portion 52 and has an outer diameter larger than the inner diameter of the tubular portion 4. 53 and a step portion (contact portion) 51 that is provided between the insertion portion 52 and the enlarged diameter portion 53 and that can contact the tip portion of the tubular portion 4.
  • the tubular body 5 is disposed concentrically with the tubular portion 4 at the tip of the tubular portion 4. Further, the insertion portion 52 of the tubular body 5 is inserted inside the distal end portion of the tubular portion 4, and thereby the posture of the tubular body 5 with respect to the tubular portion 4 can be maintained. Further, the stepped portion 51 of the tubular body 5 and the tip of the tubular portion 4 are separated from each other by a predetermined distance in the longitudinal direction of the extending wire body 2.
  • the constituent material of the tubular body 5 is not particularly limited, and for example, the same materials as those exemplified as the constituent material of the core wire 31 described above can be used.
  • the braided body 6 has a cylindrical shape (the overall shape is a cylindrical shape), is formed in a net shape by intersecting the linear bodies 61, and is called a blade line.
  • the braided body 6 has a function of sandwiching the proximal end portion of the guide wire 100 connected to the extension wire 1, and is inside the tubular body 5 (hollow portion of the tubular body 5) and inside the tubular portion 4 ( It is arrange
  • the base end portion (base end side) of the braided body 6 is fixed to the tip end portion (tip end surface) of the wire main body portion 3 (extension wire main body 2), and the tip end portion (tip end side) is the inner periphery of the tube body 5. It is fixed to the surface (inner surface). Thereby, it can prevent that the pipe body 5 inserted in the cylindrical part 4 will detach
  • FIG. since the proximal end portion of the braided body 6 is fixed to the distal end portion of the extension wire main body 2, the distal end portion of the braided body 6 is relatively aligned with the tube body 5 in the longitudinal direction of the extension wire main body 2. Can move.
  • the tip of the braided body 6 is fixed to the inner peripheral surface of the tubular body 5 in a state where the diameter is expanded with respect to the natural state.
  • the base end portion of the braided body 6 is fixed in a state of being reduced in diameter relative to the natural state, as will be described later.
  • the braided body 6 contracts and expands when the tube body 5 moves in the proximal direction with respect to the extension wire body 2, and expands when the tube body 5 moves in the distal direction with respect to the extension wire body 2. Shrink diameter.
  • the proximal end portion of the guide wire 100 is inserted into the braided body 6.
  • the inner diameter of the braided body 6 is set smaller than the outer diameter of the proximal end portion of the guide wire 100.
  • a region (region) between a portion fixed to the proximal end portion of the wire main body 3 and a portion fixed to the tubular body 5 can expand and contract in the longitudinal direction, That is, this is an effective region (effective region 62) as a portion for sandwiching the proximal end portion of the guide wire 100.
  • the fixing method between the wire main body portion 3 and the braided body 6 and the fixing method between the tube body 5 and the braided body 6 are not particularly limited.
  • fixing with a fixing material such as solder (brazing material) or adhesive. , Welding and the like.
  • the base end portion of the braided body 6 is not limited to the wire main body portion 3 and may be fixed to the cylindrical portion 4 (for example, the base end portion of the cylindrical portion 4).
  • the distal end portion of the braided body 6 is fixed to the inner peripheral surface of the tube body 5, the above-described operation is possible.
  • the proximal end portion of the guide wire 100 is connected from the distal end of the tubular body 5 of the extension wire 1 to the inside of the tubular body 5 and the braided body. 6 is inserted.
  • the braid is The body 6 is reduced in diameter by extending in the longitudinal direction, and the proximal end portion of the guide wire 100 is clamped.
  • the braided body 6 and the tubular body 5 constitute a main part of a connecting portion that sandwiches the proximal end portion of the guide wire (wire) 100.
  • the linear body 61 of the braided body 6 is inclined with respect to the central axis of the braided body 6 in a side view.
  • the inclination angle ⁇ of the linear body 61 with respect to the central axis is not particularly limited, but is preferably about 0 to 45 °, and more preferably about 20 to 40 °. Thereby, connection and removal of the extension wire 1 from the guide wire 100 can be performed more easily, and unintentional detachment of the extension wire 1 from the guide wire 100 can be prevented more reliably.
  • linear body 61 of the braided body 6 does not have to be inclined with respect to the central axis of the braided body 6 in a side view.
  • the shape of the linear body 61 is not particularly limited, but in the present embodiment, the linear body 61 has a strip shape (a flat plate shape), and the cross-sectional shape of the linear body 61 is a rectangle (square). There is no.
  • the cross-sectional shape of the linear body 61 includes other polygons such as a circle, an ellipse, a triangle, and a pentagon.
  • the base end side portion of the braided body 6 is installed in a state of being elongated in the longitudinal direction relative to the natural state, that is, in a state of being reduced in diameter relative to the natural state.
  • the natural state refers to a state where no external force is applied.
  • the extension wire 1 can be connected to the guide wire 100 having various diameters. That is, the extension wire 1 can be connected to the guide wire 100 having a diameter from the current diameter of the braided body 6 to the maximum diameter that the braided body 6 can take, so that the braided body 6 expands and contracts.
  • the range of the diameter of the guide wire 100 that can be connected can be widened.
  • the braided body 6 is not limited to a state in which the braided body 6 extends in the longitudinal direction from the natural state, and may be installed in a natural state, for example.
  • the constituent material of the linear body 61 of the braided body 6 is not particularly limited.
  • a metal material such as stainless steel or a superelastic alloy, or a resin such as polyamide, polyethylene, polypropylene, polyester, polyimide, or ABS resin.
  • examples include materials and carbon fibers.
  • the linear body 61 a single wire of the material or a fiber bundle of the same kind or different material can be used.
  • the dimensions of the braided body 6 are not particularly limited and are appropriately set according to various conditions. However, the total length of the effective region 62 of the braided body 6 in the state of being installed on the extension wire 1 is 20 to 100 mm. Is preferably about 30 to 60 mm.
  • the inner diameter of the effective region 62 of the braided body 6 in a natural state is preferably about 0.05 to 0.2 mm, and more preferably about 0.08 to 0.15 mm.
  • the maximum inner diameter of the effective area 62 that the braided body 6 can take is preferably about 0.22 to 0.35 mm, and more preferably about 0.25 to 0.3 mm.
  • b b / a is 1. It is preferably about 5 to 11.5, more preferably about 2.5 to 5.5.
  • the pitch in the longitudinal direction of the mesh in the effective region 62 of the braided body 6 in the state of being installed on the extension wire 1 is preferably about 0.06 to 0.19 mm, preferably 0.01 to 0.14 mm. More preferably, the pitch in the circumferential direction is preferably about 0.04 to 0.22 mm, and more preferably about 0.06 to 0.19 mm.
  • the extension wire 1 with respect to the proximal end portion of the guide wire 100 is used.
  • the guide wire 100 is extended.
  • the proximal end portion of the guide wire 100 is inserted into the tubular body 5 and the braided body 6 from the distal end of the tubular body 5 of the extension wire 1. Thereby, the guide wire 100 and the extension wire 1 are connected. At this time, the distal end portion of the braided body 6 is pushed in the proximal direction by the proximal end portion of the guide wire 100, the tube body 5 moves in the proximal direction with respect to the tubular portion 4, and the braided body 6 is Since contraction (expansion) occurs in the longitudinal direction, the proximal end portion of the guide wire 100 can be easily and reliably inserted into the braided body 6.
  • a state in which the proximal end portion of the guide wire 100 is inserted into the braided body 6, that is, a connected state in which the distal end portion of the extension wire 1 is connected to the proximal end portion of the guide wire 100 (hereinafter simply referred to as “connected state”).
  • the portion of the guide wire 100 inserted into the braided body 6 comes into contact (contact) with the braided body 6, and a frictional force acts between the guide wire 100 and the braided body 6.
  • the connection state is maintained by the action of 6.
  • the proximal end portion of the braided body 6 becomes the wire body. It moves in the proximal direction together with the portion 3 (extension wire body 2).
  • the distal end portion of the effective region 62 (see FIGS. 1 and 2) of the braided body 6 is held by the guidewire 100 by the frictional force between the guidewire 100 and the braided body 6 (on the guidewire 100). Or move toward the guide wire 100 side.
  • the braided body 6 expands in the longitudinal direction and contracts in diameter, whereby the braided body 6 comes into close contact with the outer periphery of the guidewire 100 and the frictional force between the guidewire 100 and the braided body 6 increases. To do. That is, the braided body 6 is reduced in diameter by extending in the longitudinal direction, and the proximal end portion of the guide wire 100 is clamped. Thus, it is possible to reliably prevent (block) the guide wire 100 from being pulled out (detached) from the braided body 6.
  • the catheter is removed from the patient's body cavity along the guide wire and the extension wire 1, and then a new catheter is introduced into the patient's body cavity along the guide wire 100 and the extension wire 1.
  • extension wire 1 remains connected to the guide wire 100, the procedure is disturbed. Next, the extension wire 1 is removed from the guide wire 100.
  • the tube body 5 When removing the extension wire 1 from the proximal end portion of the guide wire 100, as shown in FIG. 5, the tube body 5 is gripped and the guide wire 100 is pulled (moved) in the distal direction with respect to the tube body 5. At this time, the distal end portion of the braided body 6 is not moved because it is fixed to the tube body 5, but the intermediate portion of the braided body 6 is guided by the frictional force between the guidewire 100 and the braided body 6. Therefore, the guide wire 100 moves in the distal direction. The tubular portion 4 moves in the distal direction together with the braided body 6.
  • the portion from the intermediate portion to the distal end portion of the braided body 6 contracts and expands in the longitudinal direction, so that the braided body 6 reaches the proximal end portion of the guide wire 100.
  • the close contact state is released, and the braided body 6 can move with respect to the proximal end portion of the guide wire 100. Accordingly, the proximal end portion of the guide wire 100 can be easily and reliably extracted from the braided body 6, and the distal end portion of the extension wire 1 can be easily and reliably removed from the proximal end portion of the guide wire 100.
  • the extension wire 1 can be easily and reliably attached to and detached from the guide wire 100, and the extension wire 1 is unintentionally detached from the guide wire 100. It is possible to prevent the separation.
  • the braided body 6 is used as the connecting portion in the extension wire 1, the following advantages are obtained as compared with the case where a coil formed by spirally winding a linear body is used.
  • the extension wire 1 has good reliability and durability.
  • the range of the diameter of the guide wire 100 that can be connected is narrow.
  • the range of the diameter of the guide wire 100 that can be connected is as described above. There is an advantage that it is wide.
  • FIG. 6 is a longitudinal sectional perspective view showing a second embodiment of the extension wire of the present invention.
  • the left side in FIG. 6 is “tip”
  • the right side is “base end (rear end)”
  • the upper side is “upper”
  • the lower side is “lower”.
  • the distal end portion of the tubular portion 4 is configured to be thicker than the portion on the proximal end side with respect to the distal end portion.
  • the outer diameter of the distal end portion of 4 is set to be larger than the outer diameter of the portion closer to the proximal end than the distal end portion.
  • a stepped portion 41 is formed on the inner peripheral portion of the distal end portion of the tubular portion 4.
  • the stepped portion 41 of the tubular portion 4 and the proximal end of the tubular body 5 are separated from each other by a predetermined distance in the longitudinal direction of the wire body 2 for extension, and the stepped portion 51 of the tubular body 5 and the distal end of the tubular portion 4 Is spaced a predetermined distance in the longitudinal direction of the extension wire body 2.
  • the cylindrical part 4 is configured such that the proximal end side of the step part 41 is thick, whereby the rigidity of the cylindrical part 4 is improved and the kink resistance can be improved.
  • FIG. 7 is a longitudinal sectional view showing a third embodiment of the extension wire of the present invention.
  • the left side in FIG. 7 is “tip”
  • the right side is “base end (rear end)”
  • the upper side is “upper”
  • the lower side is “lower”.
  • the extension wire main body 2 does not have the cylindrical portion 4 but is constituted by the wire main body portion 3.
  • the tube body 5 is movable relative to the extension wire body 2 in the longitudinal direction of the extension wire body 2 with the distal end portion of the extension wire body 2 inserted into the base end portion thereof. is set up.
  • the braided body 6 is disposed in the tube body 5 (hollow portion of the tube body 5), and the base end portion (base end side) is fixed to the tip end portion (tip end surface) of the extension wire main body 2.
  • the distal end portion (the distal end side) is fixed to the distal end portion (the inner peripheral surface of the distal end portion) of the tube body 5.
  • extension wire 1 when the extension wire 1 is removed from the proximal end portion of the guide wire 100, the tube body 5 is gripped and the guide wire 100 is attached to the tube body 5 in the same manner as in the first embodiment described above. And pull in the tip direction.
  • the guide wire according to the present embodiment is connected to the distal end portion of the extension wire, and includes a flexible guide wire main body and a connection portion provided on the proximal end side of the guide wire main body. .
  • the connecting portion is the same as the connecting portion in the first to third embodiments, and the braided body of the connecting portion is reduced in diameter by extending in the longitudinal direction so as to sandwich the distal end portion of the extension wire.
  • FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the extension wire according to the present invention, and FIGS.
  • FIGS. 9 to 11 each show the tip of the extension wire for explaining the action of the extension wire shown in FIG. It is a side view which shows typically the inside of a part.
  • the left side in FIGS. 8 to 11 is referred to as “tip”, the right side is “base end (rear end)”, the upper side is “upper”, and the lower side is “lower”.
  • FIGS. 8 to 11 only the upper and lower cross-sectional portions of the resin layer 7 are shown in order to show the braided body 6 in an easily understandable manner.
  • the fourth embodiment will be described focusing on the differences from the first embodiment described above, and description of similar matters will be omitted. As shown in FIG.
  • the resin layer 7 is provided as a tube body which can be expanded-contracted. That is, the extension wire 1 includes an extension wire main body 2, a braided body 6, and a resin layer 7 provided so as to cover the braided body 6 from the proximal end to the distal end.
  • the extension wire main body 2 includes a wire main body portion 3.
  • the wire main body 3 includes a core wire 31 and a resin coating layer 32 that covers the core wire 31. In this case, a reduced diameter portion 311 having a reduced diameter is provided at the center of the distal end portion of the core wire 31, and in the illustrated configuration, the resin coating layer 32 is not provided in the reduced diameter portion 311.
  • the core wire 31 is provided at a portion closer to the base end side than the reduced diameter portion 311.
  • a base end portion of the braided body 6 is fixed to the reduced diameter portion 311.
  • the braided body 6 is embedded in the resin layer 7. That is, the resin layer 7 covers from the proximal end to the distal end of the inner peripheral surface and outer peripheral surface of the braided body 6, and is fixed to the entire inner peripheral surface and outer peripheral surface. 8 to 11, the braided body 6 is originally covered with the resin layer 7 and cannot be seen. However, in order to show the braided body 6, the resin layer 7 is formed except for the upper and lower cross-sectional portions. Not listed. In addition, the resin layer 7 may be provided so that only the outer peripheral surface of the braided body 6 may be covered, for example.
  • the constituent material of the resin layer 7 is not particularly limited as long as it can expand and contract.
  • various materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, urethane rubber, and silicone rubber Rubber materials and various thermoplastic elastomers such as polyurethane, polyester, polyamide, olefin, and styrene are preferred. Two or more of these can be mixed and used.
  • the operation of the extension wire 1 will be described. When the distal end portion of the extension wire 1 is connected to the proximal end portion of the guide wire 100 and the guide wire 100 is extended, as shown in FIG.
  • the distal end portion or the braided body 6 of the extension wire main body 2 is used.
  • the proximal end portion of the guide wire 100 is inserted into the braided body 6 from the distal end of the braided body 6 of the extension wire 1.
  • the distal end portion of the braided body 6 is pushed in the proximal direction by the proximal end portion of the guide wire 100, and the distal end portion of the braided body 6 moves in the proximal direction with respect to the extension wire main body 2. Since the body 6 contracts in the longitudinal direction to increase the outer diameter and the inner diameter, the proximal end portion of the guide wire 100 can be easily and reliably inserted into the braided body 6.
  • the resin layer 7 can be expanded and contracted and is deformed together with the braided body 6.
  • the proximal end portion of the braided body 6 is extended. It moves together with the wire body 2 in the proximal direction.
  • the distal end portion of the effective region 62 (see FIG. 8) of the braided body 6 is held by the guidewire 100 by the frictional force between the guidewire 100 and the braided body 6 or on the guidewire 100 side. Try to stay in.
  • the braided body 6 expands in the longitudinal direction and contracts in diameter, whereby the braided body 6 comes into close contact with the outer periphery of the guidewire 100 and the frictional force between the guidewire 100 and the braided body 6 increases.
  • the braided body 6 is reduced in diameter by extending in the longitudinal direction, and the proximal end portion of the guide wire 100 is clamped.
  • the resin layer 7 is deformed together with the braided body 6.
  • the distal end portion of the braided body 6 is gripped and the guide wire 100 is pulled with respect to the braided body 6 in the distal direction.
  • the distal end portion of the braided body 6 does not move, but the intermediate portion of the braided body 6 is held at the proximal end portion of the guidewire 100 by the frictional force between the guidewire 100 and the braided body 6. Therefore, it moves together with the guide wire 100 in the distal direction.
  • a portion from the middle portion to the tip portion of the braided body 6, that is, a portion where the guide wire 100 of the braided body 6 is inserted contracts in the longitudinal direction and expands in diameter.
  • the state of close contact with the proximal end portion is released, and the braided body 6 can move with respect to the proximal end portion of the guide wire 100. Accordingly, the proximal end portion of the guide wire 100 can be easily and reliably extracted from the braided body 6, and the distal end portion of the extension wire 1 can be easily and reliably removed from the proximal end portion of the guide wire 100.
  • the resin layer 7 is deformed together with the braided body 6. According to the extension wire 1, the same effects as those of the first embodiment described above can be obtained. And this extension wire 1 can simplify a structure compared with 1st Embodiment.
  • the extension wire and the guide wire of the present invention have been described based on the illustrated embodiment.
  • the present invention is not limited to this, and the configuration of each part is an arbitrary configuration having the same function. Can be substituted.
  • any other component may be added to the present invention.
  • the present invention may be a combination of any two or more configurations (features) of the above embodiments.
  • the extension wire can be easily and reliably attached to and detached from the wire. And since the outer diameter and the inner diameter are reduced by extending the braided body of the connecting portion in the longitudinal direction, the braided body sandwiches the proximal end portion of the wire, so that the extension wire connected to the wire Unintentional detachment from the wire can be prevented. Therefore, it has industrial applicability.

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Abstract

The disclosed extension wire (1) has: a flexible extension wire main body (2); a tube body (5) which is provided on the top end side of the extension wire main body (2); and a braided body (6). The extension wire main body (2) has: a flexible wire main body section (3); and a cylindrical section (4) fixed on the top end section of the wire main body section (3). The tube body (5) is provided on the extension wire main body (2) movable or expandable/retractable relative to the longitudinal direction of the extension wire main body (2). The braided body (6) forms a cylindrical shape, is formed by crossing a linear body (61) into a net shape, and has the function of holding the base end section of a guide wire (100) connected to the extension wire (1). The base end section of the braided body (6) is fixed to the top end section of the wire main body (3), and the top end section of the braided body (6) is fixed to the base end section of the tube body (5).

Description

延長用ワイヤおよびガイドワイヤExtension wire and guide wire
　本発明は、ガイドワイヤ等のワイヤを延長する延長用ワイヤおよびガイドワイヤに関するものである。 The present invention relates to an extension wire and a guide wire for extending a wire such as a guide wire.
　ガイドワイヤは、例えばＰＴＣＡ（Percutaneous Transluminal Coronary Angioplasty：経皮的冠状動脈血管形成術）のような、外科的手術が困難な部位の治療、または人体への低侵襲を目的とした治療や、心臓血管造影などの検査に用いられるカテーテルを誘導するのに使用される。ＰＴＣＡ術に用いられるガイドワイヤは、ガイドワイヤの先端をバルーンカテーテルの先端より突出させた状態にて、バルーンカテーテルと共に目的部位である血管狭窄部付近まで挿入され、バルーンカテーテルの先端部を血管狭窄部付近まで誘導する。 Guidewires can be used to treat difficult sites such as PTCA (Percutaneous Transluminal Coronary Angioplasty), or for the purpose of minimally invasive treatment of the human body, cardiovascular Used to guide catheters used for imaging and other examinations. A guide wire used for PTCA surgery is inserted to the vicinity of the target vascular stenosis portion together with the balloon catheter with the tip of the guide wire protruding from the tip of the balloon catheter. Guide to near.
　また、ＰＴＡ（Percutaneous Transluminal Angioplasty：経皮的血管拡張術）においても、フェモラール、イリアック、リナール、シャント等のような血管に形成された狭窄部（閉塞部）を開通させるために、ＰＴＣＡ術とほぼ同様に、ガイドワイヤを用いてバルーンカテーテルの先端部を血管狭窄部付近まで誘導する。 Also, in PTA (Percutaneous Transluminal Angioplasty), in order to open a stenosis (occlusion) formed in a blood vessel such as femoral, iliac, linal, shunt, etc. Similarly, the tip of the balloon catheter is guided to the vicinity of the vascular stenosis using a guide wire.
　ところで、ＰＴＣＡ、ＰＴＡ等の手技の最中においては、カテーテルを交換する場合がある。カテーテルを交換する際は、まず、カテーテルの内腔に挿入されているガイドワイヤの基端部に対して延長用ワイヤの先端部を接続し、そのガイドワイヤを延長する。そして、カテーテルを抜去し、新たなカテーテルに交換する。次に、ガイドワイヤから延長用ワイヤを取り外し、手技を続行する。 By the way, the catheter may be exchanged during procedures such as PTCA and PTA. When exchanging the catheter, first, the distal end portion of the extension wire is connected to the proximal end portion of the guide wire inserted into the lumen of the catheter, and the guide wire is extended. Then, the catheter is removed and replaced with a new catheter. Next, the extension wire is removed from the guide wire and the procedure is continued.
　従来の延長用ワイヤおよびガイドワイヤにおいては、ガイドワイヤの基端部に、鞘部が設けられ、延長用ワイヤの先端部に、その鞘部に嵌入し得る嵌入部が設けられている（例えば、特許文献１参照）。そして、ガイドワイヤを延長する際は、ガイドワイヤの鞘部に延長用ワイヤの嵌入部を嵌入し、ガイドワイヤに延長用ワイヤを接続する。なお、ガイドワイヤに接続された延長用ワイヤが、そのガイドワイヤから不本意に離脱しないように、ガイドワイヤの鞘部に延長用ワイヤの嵌入部を強く嵌入して接続する構成になっている。 In the conventional extension wire and guide wire, a sheath portion is provided at the proximal end portion of the guide wire, and a fitting portion that can be fitted into the sheath portion is provided at the distal end portion of the extension wire (for example, Patent Document 1). And when extending a guide wire, the insertion part of an extension wire is inserted in the sheath part of a guide wire, and the extension wire is connected to a guide wire. In addition, the extension wire connected to the guide wire is configured to be firmly connected to the sheath portion of the guide wire so that the extension wire is not unintentionally detached from the guide wire.
　しかしながら、このような従来の延長用ワイヤでは、ガイドワイヤに延長用ワイヤを接続する際、ガイドワイヤの鞘部に延長用ワイヤの嵌入部を嵌入するとき、その延長用ワイヤを非常に強い力で押し込む必要があるので、その接続操作が難しいという欠点がある。そして、前記接続操作において、延長用ワイヤの嵌入部でガイドワイヤの鞘部を潰してしまい、そのガイドワイヤに延長用ワイヤを接続することができなくなる虞がある。さらに、延長用ワイヤの嵌入部がガイドワイヤの鞘部に強く嵌入しているので、ガイドワイヤから延長用ワイヤを取り外す際、その延長用ワイヤを非常に強い力で引っ張る必要があり、その取り外し操作が難いという欠点もある。すなわち、従来の延長用ワイヤでは、ガイドワイヤに対して延長用ワイヤを着脱する操作が難しく、その操作に手間および時間を要するという問題がある。 However, in such a conventional extension wire, when the extension wire is connected to the guide wire, when the extension wire insertion portion is inserted into the sheath portion of the guide wire, the extension wire is applied with a very strong force. Since it is necessary to push in, the connection operation is difficult. In the connection operation, the sheath portion of the guide wire may be crushed by the insertion portion of the extension wire, and the extension wire may not be connected to the guide wire. Furthermore, since the extension wire insertion part is strongly inserted into the sheath of the guide wire, when removing the extension wire from the guide wire, it is necessary to pull the extension wire with a very strong force. There is also a drawback that is difficult. That is, in the conventional extension wire, there is a problem that it is difficult to attach / detach the extension wire to / from the guide wire, and that the operation requires time and effort.
特開平６－１９７９７９号公報JP-A-6-197979
　本発明の目的は、ワイヤに対し、容易かつ確実に着脱することができ、ワイヤに接続された延長用ワイヤが不本意に離脱してしまうことを防止できる延長用ワイヤおよびガイドワイヤを提供することにある。
　上記目的を達成するために、本発明は、ガイドワイヤの基端部に接続する延長用ワイヤであって、
　可撓性を有する延長用ワイヤ本体と、
　前記延長用ワイヤ本体の先端側に設けられた接続部とを備え、
　前記接続部は、前記延長用ワイヤ本体に対し、該延長用ワイヤ本体の長手方向に相対的に移動可能または伸縮可能な管体と、
　筒状をなし、線状体を交差させて網状に形成した編組体とを有し、
　前記編組体は、その長手方向に伸長することにより縮径して前記ガイドワイヤの基端部を挟持するよう構成されていることを特徴とする延長用ワイヤである。 An object of the present invention is to provide an extension wire and a guide wire that can be easily and surely attached to and detached from the wire and prevent the extension wire connected to the wire from being unintentionally detached. It is in.
In order to achieve the above object, the present invention provides an extension wire connected to a proximal end portion of a guide wire,
An extension wire body having flexibility;
A connection portion provided on the distal end side of the extension wire body,
The connecting portion is a tube that is movable or expandable relative to the extension wire body in the longitudinal direction of the extension wire body;
It has a tubular shape and has a braided body formed in a net shape by intersecting linear bodies,
The braided body is an extension wire configured to extend in the longitudinal direction to reduce the diameter and sandwich the proximal end portion of the guide wire.
　本発明の延長用ワイヤは、前記編組体の先端部は、前記管体に固定され、前記編組体の基端部は、前記延長用ワイヤ本体の先端部に固定されているのが好ましい。 In the extension wire of the present invention, it is preferable that a distal end portion of the braided body is fixed to the tube body, and a proximal end portion of the braided body is fixed to a distal end portion of the extension wire main body.
　本発明の延長用ワイヤは、前記編組体の先端部は、拡径した状態で前記管体の内面に固定され、前記編組体の基端部は、縮径した状態で固定されているのが好ましい。 In the extension wire of the present invention, the distal end portion of the braided body is fixed to the inner surface of the tubular body in an expanded state, and the proximal end portion of the braided body is fixed in a contracted state. preferable.
　本発明の延長用ワイヤは、前記編組体は、前記管体を前記延長用ワイヤ本体に対して基端方向に移動すると拡径し、前記管体を前記延長用ワイヤ本体に対して先端方向に移動すると縮径するのが好ましい。 In the extension wire of the present invention, the braided body expands in diameter when the tube body is moved in the proximal direction relative to the extension wire body, and the tube body extends in the distal direction relative to the extension wire body. It is preferable to reduce the diameter when moved.
　本発明の延長用ワイヤは、前記延長用ワイヤ本体は、その先端側に、前記編組体を収納する筒状部を有し、
　前記管体は、前記筒状部内に挿入可能な挿入部と、前記挿入部の先端側に設けられ、前記筒状部の内径よりも大きい外径を有する拡径部と、前記挿入部と前記拡径部との間に設けられ、前記筒状部の先端部に当接可能な当接部とを有し、前記筒状部に対して移動可能に設置されているのが好ましい。 In the extension wire of the present invention, the extension wire main body has a cylindrical portion that houses the braided body on the distal end side thereof,
The tubular body includes an insertion portion that can be inserted into the cylindrical portion, a diameter-enlarged portion that is provided on a distal end side of the insertion portion and has an outer diameter larger than an inner diameter of the cylindrical portion, the insertion portion, and the It is preferable to have a contact portion provided between the enlarged diameter portion and capable of contacting the distal end portion of the cylindrical portion, and to be movable with respect to the cylindrical portion.
　本発明の延長用ワイヤは、前記ガイドワイヤの基端部に当該延長用ワイヤを接続する際、前記編組体内に前記ガイドワイヤの基端部が挿入され、
　前記編組体内に前記ガイドワイヤの基端部が挿入されていない状態において、前記編組体の内径は、前記ガイドワイヤの基端部の外径よりも大きく設定されており、前記編組体内に前記ガイドワイヤの基端部が挿入されると、前記編組体が拡径するよう構成されているのが好ましい。 When the extension wire of the present invention connects the extension wire to the proximal end portion of the guide wire, the proximal end portion of the guide wire is inserted into the braided body,
In a state where the proximal end portion of the guide wire is not inserted into the braided body, an inner diameter of the braided body is set larger than an outer diameter of the proximal end portion of the guide wire, and the guide is inserted into the braided body. The braided body is preferably configured to expand in diameter when the proximal end portion of the wire is inserted.
　本発明の延長用ワイヤは、前記線状体は、側面視において、前記編組体の中心軸に対して傾斜しているのが好ましい。 In the extension wire of the present invention, it is preferable that the linear body is inclined with respect to the central axis of the braided body in a side view.
　本発明の延長用ワイヤは、前記編組体は、ブレード線であるのが好ましい。
　本発明の延長用ワイヤは、前記管体は、伸縮可能であり、前記編組体を基端から先端まで覆うように設けられているのが好ましい。
　本発明の延長用ワイヤは、前記管体は、ゴム材料または熱可塑性エラストマーで構成されているのが好ましい。 In the extension wire of the present invention, the braided body is preferably a blade wire.
In the extension wire of the present invention, the tube body is preferably extendable and provided so as to cover the braided body from the base end to the tip end.
In the extension wire of the present invention, it is preferable that the tube is made of a rubber material or a thermoplastic elastomer.
　また、上記目的を達成するために、本発明は、延長用ワイヤの先端部に接続するガイドワイヤであって、
　可撓性を有するガイドワイヤ本体と、
　前記ガイドワイヤ本体の基端側に設けられた接続部とを備え、
　前記接続部は、前記ガイドワイヤ本体に対し、該ガイドワイヤ本体の長手方向に相対的に移動可能または伸縮可能な管体と、
　筒状をなし、線状体を交差させて網状に形成した編組体とを有し、
　前記編組体は、その長手方向に伸長することにより縮径して前記延長用ワイヤの先端部を挟持するよう構成されていることを特徴とするガイドワイヤである。 In order to achieve the above object, the present invention is a guide wire connected to the distal end portion of the extension wire,
A flexible guide wire body;
A connection portion provided on the proximal end side of the guide wire body,
The connecting portion is a tube that is movable or expandable relative to the guidewire body in the longitudinal direction of the guidewire body;
It has a tubular shape and has a braided body formed in a net shape by intersecting linear bodies,
The braided body is a guide wire configured so as to be reduced in diameter by extending in a longitudinal direction thereof and to sandwich a distal end portion of the extension wire.
図１は、本発明の延長用ワイヤの第１実施形態を示す縦断面斜視図である。FIG. 1 is a longitudinal sectional perspective view showing a first embodiment of an extension wire according to the present invention. 図２は、図１に示す延長用ワイヤであり、ガイドワイヤにその延長用ワイヤを接続した状態を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing the extension wire shown in FIG. 1 and a state in which the extension wire is connected to the guide wire. 図３は、図１に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。FIG. 3 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG. 図４は、図１に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。FIG. 4 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG. 図５は、図１に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。FIG. 5 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG. 図６は、本発明の延長用ワイヤの第２実施形態を示す縦断面斜視図である。FIG. 6 is a longitudinal sectional perspective view showing a second embodiment of the extension wire of the present invention. 図７は、本発明の延長用ワイヤの第３実施形態を示す縦断面図である。FIG. 7 is a longitudinal sectional view showing a third embodiment of the extension wire of the present invention. 図８は、本発明の延長用ワイヤの第４実施形態を示す縦断面図である。FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the extension wire of the present invention. 図９は、図８に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。FIG. 9 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG. 図１０は、図８に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。FIG. 10 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the action of the extension wire shown in FIG. 図１１は、図８に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。FIG. 11 is a side view schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
　以下、本発明の延長用ワイヤおよびガイドワイヤ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, the extension wire and guide wire of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
　＜第１実施形態＞
　図１は、本発明の延長用ワイヤの第１実施形態を示す縦断面斜視図、図２は、図１に示す延長用ワイヤであり、ガイドワイヤにその延長用ワイヤを接続した状態を示す縦断面図、図３～図５は、それぞれ、図１に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。 <First Embodiment>
FIG. 1 is a longitudinal sectional perspective view showing a first embodiment of an extension wire of the present invention, and FIG. 2 is an extension wire shown in FIG. 1, and a longitudinal section showing a state in which the extension wire is connected to a guide wire. FIGS. 3 to 5 are side views schematically showing the inside of the distal end portion of the extension wire for explaining the operation of the extension wire shown in FIG.
　なお、以下では、図１～図５中の左側を「先端」、右側を「基端（後端）」、上側を「上」、下側を「下」として説明を行う。 In the following description, the left side in FIGS. 1 to 5 is referred to as “tip”, the right side is “base end (rear end)”, the upper side is “upper”, and the lower side is “lower”.
　これらの図に示す延長用ワイヤ１は、例えば、カテーテル（内視鏡も含む）の内腔に挿入して用いられるカテーテル用ガイドワイヤ等のガイドワイヤ１００の基端部に着脱自在に接続され、そのガイドワイヤ１００を延長するものである。 The extension wire 1 shown in these drawings is detachably connected to a proximal end portion of a guide wire 100 such as a catheter guide wire used by being inserted into the lumen of a catheter (including an endoscope), for example, The guide wire 100 is extended.
　図１および図２に示すように、延長用ワイヤ１は、可撓性を有する延長用ワイヤ本体２と、延長用ワイヤ本体２の先端側に設けられた管体５と、編組体６とを備えている。編組体６は、管体５内と、延長用ワイヤ本体２内との少なくとも一方に配置されていればよいが、本実施形態では、延長用ワイヤ本体２内および管体５内に配置されている。また、延長用ワイヤ１の全長は、特に限定されないが、２００～５０００ｍｍ程度であることが好ましい。また、延長用ワイヤ１の外径は、特に限定されないが、０．２～１．２ｍｍ程度であることが好ましい。 As shown in FIGS. 1 and 2, the extension wire 1 includes an extension wire main body 2 having flexibility, a tube body 5 provided on the distal end side of the extension wire main body 2, and a braided body 6. I have. The braided body 6 may be disposed in at least one of the tube body 5 and the extension wire main body 2, but in this embodiment, the braided body 6 is disposed in the extension wire main body 2 and the tube body 5. Yes. The total length of the extension wire 1 is not particularly limited, but is preferably about 200 to 5000 mm. The outer diameter of the extension wire 1 is not particularly limited, but is preferably about 0.2 to 1.2 mm.
　延長用ワイヤ本体２は、可撓性を有するワイヤ本体部３と、ワイヤ本体部３の先端部に固定された筒状部４とを有している。なお、ワイヤ本体部３と筒状部４とは、一体的に形成されていてもよい。 The extension wire main body 2 has a flexible wire main body portion 3 and a cylindrical portion 4 fixed to the distal end portion of the wire main body portion 3. In addition, the wire main-body part 3 and the cylindrical part 4 may be formed integrally.
　ワイヤ本体部３は、本実施形態では、１本の連続した芯線（線材）３１と、芯線３１を被覆する樹脂被覆層３２とで構成されており、芯線３１およびワイヤ本体部３の横断面形状は、円形をなしている。但し、本発明では、これに限らず、芯線３１は、同一または異なる材料の複数本の芯線（線材）を例えば溶接やろう接等により接合（連結）したものでもよい。また、ワイヤ本体部３は、他の構成物（例えば、他の層等）を有していてもよく、また、樹脂被覆層３２が省略されていてもよい。また、芯線３１およびワイヤ本体部３の横断面形状は、円形には限定されない。 In the present embodiment, the wire main body 3 includes a single continuous core wire (wire) 31 and a resin coating layer 32 that covers the core wire 31, and the cross-sectional shape of the core wire 31 and the wire main body 3. Is circular. However, in the present invention, the core wire 31 is not limited to this, and a plurality of core wires (wire materials) made of the same or different materials may be joined (connected) by, for example, welding or brazing. Moreover, the wire main-body part 3 may have another structure (for example, other layer etc.), and the resin coating layer 32 may be abbreviate | omitted. Moreover, the cross-sectional shape of the core wire 31 and the wire main-body part 3 is not limited to a circle.
　芯線３１の構成材料としては、特に限定されず、例えば、ステンレス鋼、Ｎｉ－Ｔｉ系合金、Ｎｉ－Ａｌ系合金、Ｃｕ－Ｚｎ系合金等の超弾性合金等の種々の金属材料や、比較的高剛性の樹脂材料が挙げられ、これらのうちの１種または２種以上を組み合わせて用いることができる。 The constituent material of the core wire 31 is not particularly limited. For example, various metal materials such as superelastic alloys such as stainless steel, Ni—Ti alloy, Ni—Al alloy, Cu—Zn alloy, A high-rigidity resin material can be used, and one or more of these can be used in combination.
　樹脂被覆層３２は、芯線３１の外周面（外表面）の全部または一部を覆うように設けられている。なお、樹脂被覆層３２は、筒状部４や管体５に設けられていてもよい。 The resin coating layer 32 is provided so as to cover all or part of the outer peripheral surface (outer surface) of the core wire 31. The resin coating layer 32 may be provided on the cylindrical portion 4 or the tube body 5.
　この樹脂被覆層３２は、種々の目的で形成することができるが、その一例として、延長用ワイヤ１の摩擦（摺動抵抗）を低減し、摺動性を向上させることがある。 The resin coating layer 32 can be formed for various purposes. For example, the resin coating layer 32 may reduce friction (sliding resistance) of the extension wire 1 and improve slidability.
　延長用ワイヤ１の摩擦（摺動抵抗）の低減を図るためには、樹脂被覆層３２は、以下に述べるような摩擦を低減し得る材料で構成されているのが好ましい。これにより、ガイドワイヤ１００や延長用ワイヤ１とともに用いられるカテーテルの内壁との摩擦抵抗（摺動抵抗）が低減されて摺動性が向上する。 In order to reduce the friction (sliding resistance) of the extension wire 1, the resin coating layer 32 is preferably made of a material that can reduce friction as described below. Thereby, the frictional resistance (sliding resistance) with the inner wall of the catheter used together with the guide wire 100 and the extension wire 1 is reduced, and the slidability is improved.
　このような摩擦を低減し得る材料としては、例えば、ポリエチレン、ポリプロピレン等のポリオレフィン、ポリ塩化ビニル、ポリエステル（ＰＥＴ、ＰＢＴ等）、ポリアミド、ポリイミド、ポリウレタン、ポリスチレン、ポリカーボネート、シリコーン樹脂、フッ素系樹脂（ＰＴＦＥ、ＥＴＦＥ等）、またはこれらの複合材料が挙げられる。 Examples of materials that can reduce such friction include polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polyesters (PET, PBT, etc.), polyamides, polyimides, polyurethanes, polystyrenes, polycarbonates, silicone resins, fluorine resins ( PTFE, ETFE, etc.) or a composite material thereof.
　その中でも特に、フッ素系樹脂（またはこれを含む複合材料）を用いた場合には、延長用ワイヤ１とカテーテルの内壁との摩擦抵抗（摺動抵抗）をより効果的に低減し、摺動性を向上させることができる。 In particular, when a fluororesin (or a composite material containing the same) is used, the frictional resistance (sliding resistance) between the extension wire 1 and the inner wall of the catheter is more effectively reduced, and the sliding property is improved. Can be improved.
　また、フッ素系樹脂（またはこれを含む複合材料）を用いた場合には、焼きつけ、吹きつけ等の方法により、樹脂材料を加熱した状態で、芯線３１への被覆を行うことができる。これにより、芯線３１と、樹脂被覆層３２との密着性は特に優れたものとなる。 Further, when a fluororesin (or a composite material containing this) is used, the core wire 31 can be coated with the resin material heated by a method such as baking or spraying. Thereby, the adhesiveness between the core wire 31 and the resin coating layer 32 is particularly excellent.
　また、樹脂被覆層３２がシリコーン樹脂（またはこれを含む複合材料）で構成されたものであると、樹脂被覆層３２を形成する（芯線３１に被覆する）際に、加熱しなくても、芯線３１に確実かつ強固に密着した樹脂被覆層３２を形成することができる。すなわち、樹脂被覆層３２をシリコーン樹脂（またはこれを含む複合材料）で構成されたものとする場合、反応硬化型の材料等を用いることができるため、樹脂被覆層３２の形成を室温にて行うことができる。このように、室温にて樹脂被覆層３２を形成することにより、簡便にコーティングができる。 Further, if the resin coating layer 32 is made of a silicone resin (or a composite material containing the same), the core wire can be formed without heating when forming the resin coating layer 32 (covering the core wire 31). Thus, the resin coating layer 32 can be formed that adheres securely and firmly to 31. That is, when the resin coating layer 32 is made of a silicone resin (or a composite material containing the same), a reaction-curing material or the like can be used, and therefore the resin coating layer 32 is formed at room temperature. be able to. Thus, by forming the resin coating layer 32 at room temperature, coating can be easily performed.
　樹脂被覆層３２の厚さは、特に限定されず、樹脂被覆層３２の形成目的や構成材料、形成方法等を考慮して適宜されるが、通常は、樹脂被覆層３２の厚さ（平均）は、１～１００μｍ程度であるのが好ましく、１～３０μｍ程度であるのがより好ましい。樹脂被覆層３２の厚さが薄すぎると、樹脂被覆層３２の形成目的が十分に発揮されないことがあり、また、樹脂被覆層３２の剥離が生じるおそれがある。また、樹脂被覆層３２の厚さが厚すぎると、芯線３１の物理的特性に影響を与えるおそれがあり、また樹脂被覆層３２の剥離が生じるおそれがある。 The thickness of the resin coating layer 32 is not particularly limited, and is appropriately determined in consideration of the purpose of forming the resin coating layer 32, the constituent material, the forming method, and the like. Usually, the thickness (average) of the resin coating layer 32 is used. Is preferably about 1 to 100 μm, more preferably about 1 to 30 μm. If the thickness of the resin coating layer 32 is too thin, the purpose of forming the resin coating layer 32 may not be sufficiently exhibited, and the resin coating layer 32 may be peeled off. Moreover, when the thickness of the resin coating layer 32 is too thick, the physical characteristics of the core wire 31 may be affected, and the resin coating layer 32 may be peeled off.
　なお、樹脂被覆層３２は、単層でもよく、また、２層以上の積層体でもよい。
　また、本発明では、芯線３１の外周面（表面）に、樹脂被覆層３２の密着性を向上するための処理（粗面加工、化学処理、熱処理等）を施したり、樹脂被覆層３２の密着性を向上し得る中間層を設けたりすることもできる。 The resin coating layer 32 may be a single layer or a laminate of two or more layers.
In the present invention, the outer peripheral surface (surface) of the core wire 31 is subjected to a treatment (roughening, chemical treatment, heat treatment, etc.) for improving the adhesion of the resin coating layer 32, or the resin coating layer 32 is adhered. An intermediate layer that can improve the properties can also be provided.
　延長用ワイヤ本体２の筒状部４は、先端に開放し、編組体６が収納される中空部を有している。筒状部４は、図示の構成では、円筒状をなしており、その基端部がワイヤ本体部３の先端部の外周面に固定されている。ワイヤ本体部３と筒状部４との固定方法は、特に限定されず、例えば、半田（ろう材）や、接着剤等の固定材料による固定、溶接等が挙げられる。 The cylindrical portion 4 of the extension wire body 2 has a hollow portion that opens to the tip and accommodates the braided body 6. In the illustrated configuration, the cylindrical portion 4 has a cylindrical shape, and a proximal end portion thereof is fixed to the outer peripheral surface of the distal end portion of the wire main body portion 3. The fixing method of the wire main body part 3 and the cylindrical part 4 is not specifically limited, For example, fixing with solder (brazing material), fixing materials, such as an adhesive agent, welding, etc. are mentioned.
　筒状部４の構成材料としては、特に限定されず、例えば、前述した芯線３１の構成材料として例示したものと同様のものを用いることができる。 The constituent material of the cylindrical portion 4 is not particularly limited, and for example, the same materials as those exemplified as the constituent material of the core wire 31 described above can be used.
　なお、本発明では、筒状部４に換えて、例えば、横断面形状がＣ字状をなすものを用いてもよい。 In the present invention, instead of the cylindrical portion 4, for example, a cross section having a C shape may be used.
　管体５は、図示の構成では、円筒状をなしており、延長用ワイヤ本体２、すなわち、筒状部４に対し、延長用ワイヤ本体２の長手方向に相対的に移動可能に設置されている。 The tubular body 5 has a cylindrical shape in the illustrated configuration, and is installed so as to be relatively movable in the longitudinal direction of the extending wire body 2 with respect to the extending wire body 2, that is, the tubular portion 4. Yes.
　具体的には、管体５は、筒状部４内に挿入可能な挿入部５２と、挿入部５２の先端側に設けられ、筒状部４の内径よりも大きい外径を有する拡径部５３と、挿入部５２と拡径部５３との間に設けられ、筒状部４の先端部に当接可能な段差部（当接部）５１とを有している。 Specifically, the tubular body 5 includes an insertion portion 52 that can be inserted into the tubular portion 4, and a diameter-enlarged portion that is provided on the distal end side of the insertion portion 52 and has an outer diameter larger than the inner diameter of the tubular portion 4. 53 and a step portion (contact portion) 51 that is provided between the insertion portion 52 and the enlarged diameter portion 53 and that can contact the tip portion of the tubular portion 4.
　この管体５は、筒状部４の先端部に、その筒状部４と同心的に配置されている。また、管体５の挿入部５２は、筒状部４の先端部の内側に挿入されており、これにより、筒状部４に対する管体５の姿勢を保持することができる。また、管体５の段差部５１と筒状部４の先端とは、延長用ワイヤ本体２の長手方向に所定距離離間している。 The tubular body 5 is disposed concentrically with the tubular portion 4 at the tip of the tubular portion 4. Further, the insertion portion 52 of the tubular body 5 is inserted inside the distal end portion of the tubular portion 4, and thereby the posture of the tubular body 5 with respect to the tubular portion 4 can be maintained. Further, the stepped portion 51 of the tubular body 5 and the tip of the tubular portion 4 are separated from each other by a predetermined distance in the longitudinal direction of the extending wire body 2.
　管体５の構成材料としては、特に限定されず、例えば、前述した芯線３１の構成材料として例示したものと同様のものを用いることができる。 The constituent material of the tubular body 5 is not particularly limited, and for example, the same materials as those exemplified as the constituent material of the core wire 31 described above can be used.
　編組体６は、筒状（全体形状が筒状）をなし、線状体６１を交差させて網状に形成したものであり、ブレード線と呼ばれている。この編組体６は、延長用ワイヤ１に接続されたガイドワイヤ１００の基端部を挟持する機能を有しており、管体５内（管体５の中空部）および筒状部４内（筒状部４の中空部）に配置されている。 The braided body 6 has a cylindrical shape (the overall shape is a cylindrical shape), is formed in a net shape by intersecting the linear bodies 61, and is called a blade line. The braided body 6 has a function of sandwiching the proximal end portion of the guide wire 100 connected to the extension wire 1, and is inside the tubular body 5 (hollow portion of the tubular body 5) and inside the tubular portion 4 ( It is arrange | positioned in the hollow part of the cylindrical part 4. FIG.
　編組体６の基端部（基端側）は、ワイヤ本体部３（延長用ワイヤ本体２）の先端部（先端面）に固定され、先端部（先端側）は、管体５の内周面（内面）に固定されている。これにより、筒状部４内に挿入された管体５が、その筒状部４から離脱してしまうことを阻止することができる。また、編組体６の基端部は延長用ワイヤ本体２の先端部に固定されているので、編組体６の先端部は、管体５とともに、延長用ワイヤ本体２の長手方向に相対的に移動することができる。 The base end portion (base end side) of the braided body 6 is fixed to the tip end portion (tip end surface) of the wire main body portion 3 (extension wire main body 2), and the tip end portion (tip end side) is the inner periphery of the tube body 5. It is fixed to the surface (inner surface). Thereby, it can prevent that the pipe body 5 inserted in the cylindrical part 4 will detach | leave from the cylindrical part 4. FIG. Further, since the proximal end portion of the braided body 6 is fixed to the distal end portion of the extension wire main body 2, the distal end portion of the braided body 6 is relatively aligned with the tube body 5 in the longitudinal direction of the extension wire main body 2. Can move.
　また、編組体６の先端部は、自然状態に対して拡径した状態で管体５の内周面に固定されている。これにより、ガイドワイヤ１００の基端部を編組体６内に挿入する際、そのガイドワイヤ１００の基端部を編組体６の先端開口に確実に挿入することができる。 Also, the tip of the braided body 6 is fixed to the inner peripheral surface of the tubular body 5 in a state where the diameter is expanded with respect to the natural state. Thus, when the proximal end portion of the guide wire 100 is inserted into the braided body 6, the proximal end portion of the guide wire 100 can be reliably inserted into the distal end opening of the braided body 6.
　一方、編組体６の基端部は、後述するように、自然状態に対して縮径した状態で固定されている。 On the other hand, the base end portion of the braided body 6 is fixed in a state of being reduced in diameter relative to the natural state, as will be described later.
　この編組体６は、管体５が延長用ワイヤ本体２に対して基端方向に移動すると収縮して拡径し、管体５が延長用ワイヤ本体２に対して先端方向に移動すると伸長して収縮径する。 The braided body 6 contracts and expands when the tube body 5 moves in the proximal direction with respect to the extension wire body 2, and expands when the tube body 5 moves in the distal direction with respect to the extension wire body 2. Shrink diameter.
　なお、ガイドワイヤ１００の基端部に延長用ワイヤ１を接続する際は、この編組体６内にガイドワイヤ１００の基端部が挿入される。編組体６内にガイドワイヤ１００の基端部が挿入されていない状態において、編組体６の内径は、ガイドワイヤ１００の基端部の外径よりも小さく設定されており、編組体６内にガイドワイヤ１００の基端部が挿入されると、編組体６は、拡径する。 Note that when the extension wire 1 is connected to the proximal end portion of the guide wire 100, the proximal end portion of the guide wire 100 is inserted into the braided body 6. In a state in which the proximal end portion of the guide wire 100 is not inserted into the braided body 6, the inner diameter of the braided body 6 is set smaller than the outer diameter of the proximal end portion of the guide wire 100. When the proximal end portion of the guide wire 100 is inserted, the braided body 6 is expanded in diameter.
　なお、編組体６のうち、ワイヤ本体部３の基端部に固定された部位と、管体５に固定された部位との間の領域（部位）が、その長手方向に伸縮し得る領域、すなわち、ガイドワイヤ１００の基端部を挟持する部位として有効な領域（有効領域６２）である。 Of the braided body 6, a region (region) between a portion fixed to the proximal end portion of the wire main body 3 and a portion fixed to the tubular body 5 can expand and contract in the longitudinal direction, That is, this is an effective region (effective region 62) as a portion for sandwiching the proximal end portion of the guide wire 100.
　ワイヤ本体部３と編組体６との固定方法および管体５と編組体６との固定方法は、それぞれ、特に限定されず、例えば、半田（ろう材）や、接着剤等の固定材料による固定、溶接等が挙げられる。 The fixing method between the wire main body portion 3 and the braided body 6 and the fixing method between the tube body 5 and the braided body 6 are not particularly limited. For example, fixing with a fixing material such as solder (brazing material) or adhesive. , Welding and the like.
　なお、編組体６の基端部は、ワイヤ本体部３に限らず、筒状部４（例えば、筒状部４の基端部）に固定されていてもよい。 The base end portion of the braided body 6 is not limited to the wire main body portion 3 and may be fixed to the cylindrical portion 4 (for example, the base end portion of the cylindrical portion 4).
　また、編組体６の先端部は、管体５の内周面に固定されていれば、前述した動作が可能であるが、特に、管体５の段差部５１より基端側の内周面に固定されていることが好ましい。 In addition, if the distal end portion of the braided body 6 is fixed to the inner peripheral surface of the tube body 5, the above-described operation is possible. In particular, the inner peripheral surface on the proximal end side from the stepped portion 51 of the tube body 5. It is preferable to be fixed to.
　ガイドワイヤ１００の基端部に対して延長用ワイヤ１の先端部を接続する際は、ガイドワイヤ１００の基端部を延長用ワイヤ１の管体５の先端からその管体５内および編組体６内に挿入する。この状態において、ガイドワイヤ１００と延長用ワイヤ１とが互いに離間する方向（編組体６内からガイドワイヤ１００が抜ける方向）に、ガイドワイヤ１００に対して延長用ワイヤ１を若干移動させると、編組体６は、その長手方向に伸長することにより縮径し、ガイドワイヤ１００の基端部を挟持する。これにより、編組体６内からガイドワイヤ１００が抜けてしまうこと（離脱してしまうこと）を防止（阻止）することができる。この作用や、ガイドワイヤ１００の基端部に対して延長用ワイヤ１の先端部を着脱する際の作用については、後で詳述する。なお、編組体６および管体５により、ガイドワイヤ（ワイヤ）１００の基端部を挟持する接続部の主要部が構成される。 When the distal end portion of the extension wire 1 is connected to the proximal end portion of the guide wire 100, the proximal end portion of the guide wire 100 is connected from the distal end of the tubular body 5 of the extension wire 1 to the inside of the tubular body 5 and the braided body. 6 is inserted. In this state, when the extension wire 1 is slightly moved with respect to the guide wire 100 in a direction in which the guide wire 100 and the extension wire 1 are separated from each other (a direction in which the guide wire 100 is removed from the braided body 6), the braid is The body 6 is reduced in diameter by extending in the longitudinal direction, and the proximal end portion of the guide wire 100 is clamped. Thereby, it is possible to prevent (block) the guide wire 100 from coming off (leaving) from the braided body 6. This action and the action when the distal end portion of the extension wire 1 is attached to and detached from the proximal end portion of the guide wire 100 will be described in detail later. The braided body 6 and the tubular body 5 constitute a main part of a connecting portion that sandwiches the proximal end portion of the guide wire (wire) 100.
　また、編組体６の線状体６１は、側面視で、その編組体６の中心軸に対して傾斜している。これにより、ガイドワイヤ１００に対する延長用ワイヤ１の接続および取り外しを容易に行うことができ、また、ガイドワイヤ１００からの延長用ワイヤ１の不本意な離脱を確実に防止することができる。 Further, the linear body 61 of the braided body 6 is inclined with respect to the central axis of the braided body 6 in a side view. As a result, the extension wire 1 can be easily connected to and detached from the guide wire 100, and unintentional detachment of the extension wire 1 from the guide wire 100 can be reliably prevented.
　前記中心軸に対する線状体６１の傾斜角度θは、特に限定されないが、０～４５°程度であることが好ましく、２０～４０°程度であることがより好ましい。これにより、ガイドワイヤ１００に対する延長用ワイヤ１の接続および取り外しをより容易に行うことができ、また、ガイドワイヤ１００からの延長用ワイヤ１の不本意な離脱をより確実に防止することができる。 The inclination angle θ of the linear body 61 with respect to the central axis is not particularly limited, but is preferably about 0 to 45 °, and more preferably about 20 to 40 °. Thereby, connection and removal of the extension wire 1 from the guide wire 100 can be performed more easily, and unintentional detachment of the extension wire 1 from the guide wire 100 can be prevented more reliably.
　なお、編組体６の線状体６１は、側面視で、その編組体６の中心軸に対して傾斜していなくてもよいことは、言うまでもない。 In addition, it goes without saying that the linear body 61 of the braided body 6 does not have to be inclined with respect to the central axis of the braided body 6 in a side view.
　また、線状体６１の形状は、特に限定されないが、本実施形態では、線状体６１は、帯状（平板状）をなし、その線状体６１の横断面形状は、長方形（四角形）をなしている。なお、線状体６１の横断面形状は、この他、例えば、円形、楕円形、三角形、五角形等の他の多角形等が挙げられる。 In addition, the shape of the linear body 61 is not particularly limited, but in the present embodiment, the linear body 61 has a strip shape (a flat plate shape), and the cross-sectional shape of the linear body 61 is a rectangle (square). There is no. In addition, the cross-sectional shape of the linear body 61 includes other polygons such as a circle, an ellipse, a triangle, and a pentagon.
　また、編組体６の先端部よりも基端側の部位は、自然状態に対してその長手方向に伸長した状態、すなわち、自然状態に対して縮径した状態で設置されている。自然状態とは、外力が付与していない状態を言う。これにより、種々の径のガイドワイヤ１００に対し、延長用ワイヤ１を接続することができる。すなわち、延長用ワイヤ１は、編組体６の現状の径からその編組体６のとり得る最大径までの径のガイドワイヤ１００に対して接続することができるので、編組体６が伸長して縮径した状態で設置されることにより、接続可能なガイドワイヤ１００の径の範囲を広くすることができる。 Further, the base end side portion of the braided body 6 is installed in a state of being elongated in the longitudinal direction relative to the natural state, that is, in a state of being reduced in diameter relative to the natural state. The natural state refers to a state where no external force is applied. Thereby, the extension wire 1 can be connected to the guide wire 100 having various diameters. That is, the extension wire 1 can be connected to the guide wire 100 having a diameter from the current diameter of the braided body 6 to the maximum diameter that the braided body 6 can take, so that the braided body 6 expands and contracts. By installing in the diameter state, the range of the diameter of the guide wire 100 that can be connected can be widened.
　なお、編組体６は、自然状態からその長手方向に伸長した状態に限らず、例えば、自然状態で設置されていてもよい。 In addition, the braided body 6 is not limited to a state in which the braided body 6 extends in the longitudinal direction from the natural state, and may be installed in a natural state, for example.
　また、編組体６の線状体６１の構成材料としては、特に限定されないが、例えば、ステンレス鋼、超弾性合金等の金属材料や、ポリアミド、ポリエチレン、ポリプロピレン、ポリエステル、ポリイミド、ＡＢＳ樹脂等の樹脂材料、カーボンファイバー等が挙げられる。この線状体６１としては、前記材料の単線や、同種または異種材料の繊維束を用いることができる。 In addition, the constituent material of the linear body 61 of the braided body 6 is not particularly limited. For example, a metal material such as stainless steel or a superelastic alloy, or a resin such as polyamide, polyethylene, polypropylene, polyester, polyimide, or ABS resin. Examples include materials and carbon fibers. As the linear body 61, a single wire of the material or a fiber bundle of the same kind or different material can be used.
　なお、編組体６の寸法は、特に限定されず、諸条件に応じて適宜設定されるが、延長用ワイヤ１に設置された状態での編組体６の有効領域６２の全長は、２０～１００ｍｍ程度であることが好ましく、３０～６０ｍｍ程度であることがより好ましい。 The dimensions of the braided body 6 are not particularly limited and are appropriately set according to various conditions. However, the total length of the effective region 62 of the braided body 6 in the state of being installed on the extension wire 1 is 20 to 100 mm. Is preferably about 30 to 60 mm.
　また、自然状態での編組体６の有効領域６２の内径は、０．０５～０．２ｍｍ程度であることが好ましく、０．０８～０．１５ｍｍ程度であることがより好ましい。 Further, the inner diameter of the effective region 62 of the braided body 6 in a natural state is preferably about 0.05 to 0.2 mm, and more preferably about 0.08 to 0.15 mm.
　また、編組体６のとり得る有効領域６２の最大内径は、０．２２～０．３５ｍｍ程度であることが好ましく、０．２５～０．３ｍｍ程度であることがより好ましい。 Further, the maximum inner diameter of the effective area 62 that the braided body 6 can take is preferably about 0.22 to 0.35 mm, and more preferably about 0.25 to 0.3 mm.
　また、延長用ワイヤ１に設置された状態での編組体６の有効領域６２の内径をａ、編組体６のとり得る有効領域６２の最大内径をｂとしたとき、ｂ／ａは、１．５～１１．５程度であることが好ましく、２．５～５．５程度であることがより好ましい。 Further, when the inner diameter of the effective area 62 of the braided body 6 in the state of being installed on the extension wire 1 is a, and the maximum inner diameter of the effective area 62 that the braided body 6 can take is b, b / a is 1. It is preferably about 5 to 11.5, more preferably about 2.5 to 5.5.
　また、延長用ワイヤ１に設置された状態での編組体６の有効領域６２における網目の長手方向のピッチは、０．０６～０．１９ｍｍ程度であることが好ましく、０．０１～０．１４ｍｍ程度であることがより好ましく、また、周方向のピッチは、０．０４～０．２２ｍｍ程度であることが好ましく、０．０６～０．１９ｍｍ程度であることがより好ましい。 Further, the pitch in the longitudinal direction of the mesh in the effective region 62 of the braided body 6 in the state of being installed on the extension wire 1 is preferably about 0.06 to 0.19 mm, preferably 0.01 to 0.14 mm. More preferably, the pitch in the circumferential direction is preferably about 0.04 to 0.22 mm, and more preferably about 0.06 to 0.19 mm.
　次に、延長用ワイヤ１の使用例として、カテーテルを交換する場合の手順およびその際の延長用ワイヤ１の作用を説明する。 Next, as an example of use of the extension wire 1, the procedure for exchanging the catheter and the action of the extension wire 1 at that time will be described.
　カテーテルを交換する際は、そのカテーテルの内腔に挿入されているガイドワイヤ１００のみでは、その長さが不足しているので、まず、前記ガイドワイヤ１００の基端部に対して延長用ワイヤ１の先端部を接続し、そのガイドワイヤ１００を延長する。 When exchanging the catheter, since only the guide wire 100 inserted into the lumen of the catheter is insufficient in length, first, the extension wire 1 with respect to the proximal end portion of the guide wire 100 is used. The guide wire 100 is extended.
　すなわち、図３に示すように、ガイドワイヤ１００の基端部を延長用ワイヤ１の管体５の先端からその管体５内および編組体６内に挿入する。これにより、ガイドワイヤ１００と延長用ワイヤ１とが接続される。この際は、ガイドワイヤ１００の基端部により、編組体６の先端部が基端方向に押され、管体５が筒状部４に対して基端方向に移動し、編組体６は、その長手方向に収縮（拡径）するので、ガイドワイヤ１００の基端部を編組体６内に容易かつ確実に挿入することができる。 That is, as shown in FIG. 3, the proximal end portion of the guide wire 100 is inserted into the tubular body 5 and the braided body 6 from the distal end of the tubular body 5 of the extension wire 1. Thereby, the guide wire 100 and the extension wire 1 are connected. At this time, the distal end portion of the braided body 6 is pushed in the proximal direction by the proximal end portion of the guide wire 100, the tube body 5 moves in the proximal direction with respect to the tubular portion 4, and the braided body 6 is Since contraction (expansion) occurs in the longitudinal direction, the proximal end portion of the guide wire 100 can be easily and reliably inserted into the braided body 6.
　このガイドワイヤ１００の基端部が編組体６内に挿入された状態、すなわち、延長用ワイヤ１の先端部がガイドワイヤ１００の基端部に接続された接続状態（以下、単に「接続状態」とも言う）では、ガイドワイヤ１００の編組体６内に挿入されている部位が編組体６に接触（密着）し、そのガイドワイヤ１００と編組体６との間に摩擦力が作用し、編組体６の働きにより、その接続状態が保持される。 A state in which the proximal end portion of the guide wire 100 is inserted into the braided body 6, that is, a connected state in which the distal end portion of the extension wire 1 is connected to the proximal end portion of the guide wire 100 (hereinafter simply referred to as “connected state”). In other words, the portion of the guide wire 100 inserted into the braided body 6 comes into contact (contact) with the braided body 6, and a frictional force acts between the guide wire 100 and the braided body 6. The connection state is maintained by the action of 6.
　図４に示すように、接続状態で、延長用ワイヤ本体２を把持し、例えば、ガイドワイヤ１００に対して延長用ワイヤ１を基端方向に引っ張ると、編組体６の基端部がワイヤ本体部３（延長用ワイヤ本体２）とともに基端方向に移動する。一方、編組体６の有効領域６２（図１および図２参照）の先端部は、ガイドワイヤ１００とその編組体６との間の摩擦力により、ガイドワイヤ１００に保持される（ガイドワイヤ１００に対して基端方向に移動しない）か、または、ガイドワイヤ１００側に留まろうとする。これにより、編組体６がその長手方向に伸長して縮径し、これによって、編組体６がガイドワイヤ１００の外周部に密着し、ガイドワイヤ１００と編組体６との間の摩擦力が増大する。すなわち、編組体６が、その長手方向に伸長することにより縮径し、ガイドワイヤ１００の基端部を挟持する。これによって、編組体６内からガイドワイヤ１００が抜けてしまうこと（離脱してしまうこと）を確実に防止（阻止）することができる。 As shown in FIG. 4, when the extension wire body 2 is gripped in the connected state and, for example, the extension wire 1 is pulled in the proximal direction with respect to the guide wire 100, the proximal end portion of the braided body 6 becomes the wire body. It moves in the proximal direction together with the portion 3 (extension wire body 2). On the other hand, the distal end portion of the effective region 62 (see FIGS. 1 and 2) of the braided body 6 is held by the guidewire 100 by the frictional force between the guidewire 100 and the braided body 6 (on the guidewire 100). Or move toward the guide wire 100 side. As a result, the braided body 6 expands in the longitudinal direction and contracts in diameter, whereby the braided body 6 comes into close contact with the outer periphery of the guidewire 100 and the frictional force between the guidewire 100 and the braided body 6 increases. To do. That is, the braided body 6 is reduced in diameter by extending in the longitudinal direction, and the proximal end portion of the guide wire 100 is clamped. Thus, it is possible to reliably prevent (block) the guide wire 100 from being pulled out (detached) from the braided body 6.
　次に、患者の体腔からガイドワイヤおよび延長用ワイヤ１に沿ってカテーテルを抜去し、この後、患者の体腔内にガイドワイヤ１００および延長用ワイヤ１に沿って新たなカテーテルを導入する。 Next, the catheter is removed from the patient's body cavity along the guide wire and the extension wire 1, and then a new catheter is introduced into the patient's body cavity along the guide wire 100 and the extension wire 1.
　ガイドワイヤ１００に延長用ワイヤ１が接続されたままであると手技の邪魔になるので、次に、ガイドワイヤ１００から延長用ワイヤ１を取り外す。 If the extension wire 1 remains connected to the guide wire 100, the procedure is disturbed. Next, the extension wire 1 is removed from the guide wire 100.
　ガイドワイヤ１００の基端部から延長用ワイヤ１を取り外す際は、図５に示すように、管体５を把持し、ガイドワイヤ１００を管体５に対して先端方向に引っ張る（移動させる）。この際、編組体６の先端部は、管体５に固定されているので移動しないが、編組体６の中間部は、ガイドワイヤ１００とその編組体６との間の摩擦力によりガイドワイヤ１００の基端部に保持されているので、ガイドワイヤ１００とともに先端方向に移動する。なお、筒状部４は、編組体６とともに先端方向に移動する。これにより、編組体６の中間部から先端部までの部位（ガイドワイヤ１００が挿入されている部位）がその長手方向に収縮して拡径し、編組体６がガイドワイヤ１００の基端部に密着した状態が解除され、ガイドワイヤ１００の基端部に対し編組体６が移動し得るようになる。これによって、ガイドワイヤ１００の基端部を編組体６内から容易かつ確実に抜き取ることができ、ガイドワイヤ１００の基端部から延長用ワイヤ１の先端部を容易かつ確実に取り外すことができる。 When removing the extension wire 1 from the proximal end portion of the guide wire 100, as shown in FIG. 5, the tube body 5 is gripped and the guide wire 100 is pulled (moved) in the distal direction with respect to the tube body 5. At this time, the distal end portion of the braided body 6 is not moved because it is fixed to the tube body 5, but the intermediate portion of the braided body 6 is guided by the frictional force between the guidewire 100 and the braided body 6. Therefore, the guide wire 100 moves in the distal direction. The tubular portion 4 moves in the distal direction together with the braided body 6. As a result, the portion from the intermediate portion to the distal end portion of the braided body 6 (the portion where the guide wire 100 is inserted) contracts and expands in the longitudinal direction, so that the braided body 6 reaches the proximal end portion of the guide wire 100. The close contact state is released, and the braided body 6 can move with respect to the proximal end portion of the guide wire 100. Accordingly, the proximal end portion of the guide wire 100 can be easily and reliably extracted from the braided body 6, and the distal end portion of the extension wire 1 can be easily and reliably removed from the proximal end portion of the guide wire 100.
　以上説明したように、この延長用ワイヤ１によれば、ガイドワイヤ１００に対して延長用ワイヤ１を容易かつ確実に着脱することができ、また、不本意に延長用ワイヤ１がガイドワイヤ１００から離脱してしまうことを防止することができる。 As described above, according to the extension wire 1, the extension wire 1 can be easily and reliably attached to and detached from the guide wire 100, and the extension wire 1 is unintentionally detached from the guide wire 100. It is possible to prevent the separation.
　また、この延長用ワイヤ１では、接続部として、編組体６を用いるので、線状体を螺旋状に巻回してなるコイルを用いる場合に比べて、下記の利点を有する。 In addition, since the braided body 6 is used as the connecting portion in the extension wire 1, the following advantages are obtained as compared with the case where a coil formed by spirally winding a linear body is used.
　まず、コイルを用いる場合は、ガイドワイヤ１００の基端部がコイルの途中まで挿入された状態では、コイルのガイドワイヤ１００が挿入されていない部位が、非常に弱く、破損し易い。これに対し、編組体６を用いる場合は、ガイドワイヤ１００が挿入されていない部位においても隣り合う線状体６１同士が互いに補い合うので、非常に強く、破損し難く、このため、延長用ワイヤ１は、信頼性および耐久性が良い。 First, when using a coil, when the proximal end portion of the guide wire 100 is inserted partway through the coil, the portion of the coil where the guide wire 100 is not inserted is very weak and easily damaged. On the other hand, when the braided body 6 is used, since the adjacent linear bodies 61 complement each other even in a portion where the guide wire 100 is not inserted, it is very strong and is not easily damaged. Therefore, the extension wire 1 Has good reliability and durability.
　また、コイルを用いる場合は、コイルの隣り合う線状体の一方が他方に乗り上げ易く、このコイルの乗り上げが生じると、使用できなくなる。これに対し、編組体６を用いる場合は、このような問題がなく、延長用ワイヤ１は、信頼性および耐久性が良い。 Also, when a coil is used, one of the adjacent linear bodies of the coil easily rides on the other, and if this coil rides up, it cannot be used. On the other hand, when the braided body 6 is used, there is no such problem, and the extension wire 1 has good reliability and durability.
　また、コイルを用いる場合は、接続可能なガイドワイヤ１００の径の範囲が狭いが、編組体６を用いた延長用ワイヤ１では、前述したように、接続可能なガイドワイヤ１００の径の範囲が広いという利点がある。 In addition, when the coil is used, the range of the diameter of the guide wire 100 that can be connected is narrow. However, in the extension wire 1 using the braided body 6, the range of the diameter of the guide wire 100 that can be connected is as described above. There is an advantage that it is wide.
　＜第２実施形態＞
　図６は、本発明の延長用ワイヤの第２実施形態を示す縦断面斜視図である。なお、以下では、図６中の左側を「先端」、右側を「基端（後端）」、上側を「上」、下側を「下」として説明を行う。 Second Embodiment
FIG. 6 is a longitudinal sectional perspective view showing a second embodiment of the extension wire of the present invention. In the following description, the left side in FIG. 6 is “tip”, the right side is “base end (rear end)”, the upper side is “upper”, and the lower side is “lower”.
　以下、第２実施形態について、前述した第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。 Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment described above, and description of similar matters will be omitted.
　図６に示すように、第２実施形態の延長用ワイヤ１では、筒状部４の先端部は、その先端部よりも基端側の部位よりも肉厚に構成されており、筒状部４の先端部の外径は、その先端部よりも基端側の部位の外径よりも大きく設定されている。これにより、筒状部４の先端部の内周部には、段差部４１が形成されている。 As shown in FIG. 6, in the extension wire 1 of the second embodiment, the distal end portion of the tubular portion 4 is configured to be thicker than the portion on the proximal end side with respect to the distal end portion. The outer diameter of the distal end portion of 4 is set to be larger than the outer diameter of the portion closer to the proximal end than the distal end portion. Thereby, a stepped portion 41 is formed on the inner peripheral portion of the distal end portion of the tubular portion 4.
　また、筒状部４の段差部４１と管体５の基端とは、延長用ワイヤ本体２の長手方向に所定距離離間し、また、管体５の段差部５１と筒状部４の先端とは、延長用ワイヤ本体２の長手方向に所定距離離間している。 Further, the stepped portion 41 of the tubular portion 4 and the proximal end of the tubular body 5 are separated from each other by a predetermined distance in the longitudinal direction of the wire body 2 for extension, and the stepped portion 51 of the tubular body 5 and the distal end of the tubular portion 4 Is spaced a predetermined distance in the longitudinal direction of the extension wire body 2.
　この延長用ワイヤ１によれば、前述した第１実施形態と同様の効果が得られる。
　さらに、筒状部４は、段差部４１より基端側の部位が肉厚に構成されていることにより、筒状部４の剛性が向上し、耐キンク性を高めることができる。 According to the extension wire 1, the same effects as those of the first embodiment described above can be obtained.
Furthermore, the cylindrical part 4 is configured such that the proximal end side of the step part 41 is thick, whereby the rigidity of the cylindrical part 4 is improved and the kink resistance can be improved.
　＜第３実施形態＞
　図７は、本発明の延長用ワイヤの第３実施形態を示す縦断面図である。なお、以下では、図７中の左側を「先端」、右側を「基端（後端）」、上側を「上」、下側を「下」として説明を行う。 <Third Embodiment>
FIG. 7 is a longitudinal sectional view showing a third embodiment of the extension wire of the present invention. In the following description, the left side in FIG. 7 is “tip”, the right side is “base end (rear end)”, the upper side is “upper”, and the lower side is “lower”.
　以下、第３実施形態について、前述した第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。 Hereinafter, the third embodiment will be described with a focus on the differences from the first embodiment described above, and description of similar matters will be omitted.
　図７に示すように、第３実施形態の延長用ワイヤ１では、延長用ワイヤ本体２は、筒状部４を有しておらず、ワイヤ本体部３で構成されている。 As shown in FIG. 7, in the extension wire 1 of the third embodiment, the extension wire main body 2 does not have the cylindrical portion 4 but is constituted by the wire main body portion 3.
　また、管体５は、その基端部に延長用ワイヤ本体２の先端部が挿入された状態で、延長用ワイヤ本体２に対し、延長用ワイヤ本体２の長手方向に相対的に移動可能に設置されている。 The tube body 5 is movable relative to the extension wire body 2 in the longitudinal direction of the extension wire body 2 with the distal end portion of the extension wire body 2 inserted into the base end portion thereof. is set up.
　また、編組体６は、管体５内（管体５の中空部）に配置されており、その基端部（基端側）は、延長用ワイヤ本体２の先端部（先端面）に固定され、先端部（先端側）は、管体５の先端部（先端部の内周面）に固定されている。 The braided body 6 is disposed in the tube body 5 (hollow portion of the tube body 5), and the base end portion (base end side) is fixed to the tip end portion (tip end surface) of the extension wire main body 2. The distal end portion (the distal end side) is fixed to the distal end portion (the inner peripheral surface of the distal end portion) of the tube body 5.
　この延長用ワイヤ１では、ガイドワイヤ１００の基端部から延長用ワイヤ１を取り外す際は、前述した第１実施形態と同様に、管体５を把持し、ガイドワイヤ１００を管体５に対して先端方向に引っ張る。 In the extension wire 1, when the extension wire 1 is removed from the proximal end portion of the guide wire 100, the tube body 5 is gripped and the guide wire 100 is attached to the tube body 5 in the same manner as in the first embodiment described above. And pull in the tip direction.
　以上で、説明は省略するが、この延長用ワイヤ１によれば、前述した第１実施形態と同様の効果が得られる。 Although the description is omitted above, according to the extension wire 1, the same effects as those of the first embodiment described above can be obtained.
　＜ガイドワイヤの実施形態＞
　本発明のガイドワイヤの実施形態について説明する。この場合、前述した延長用ワイヤの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。 <Embodiment of Guide Wire>
An embodiment of the guide wire of the present invention will be described. In this case, the difference from the above-described embodiment of the extension wire will be mainly described, and the description of the same matters will be omitted.
　本実施形態のガイドワイヤは、延長用ワイヤの先端部に接続するものであり、可撓性を有するガイドワイヤ本体と、このガイドワイヤ本体の基端側に設けられた接続部とを備えている。接続部は、第１～第３実施形態における接続部と同様のものであり、接続部の編組体が、その長手方向に伸長することにより縮径して延長用ワイヤの先端部を挟持する。なお、接続部として、後述する第４実施形態における接続部と同様のものを用いてもよい。
　＜第４実施形態＞
　図８は、本発明の延長用ワイヤの第４実施形態を示す縦断面図、図９～図１１は、それぞれ、図８に示す延長用ワイヤの作用を説明するためのその延長用ワイヤの先端部の内部を摸式的に示す側面図である。
　なお、以下では、図８～図１１中の左側を「先端」、右側を「基端（後端）」、上側を「上」、下側を「下」として説明を行う。また、図８～図１１では、編組体６を判り易く示すため、樹脂層７は、上下の断面の部分のみ記載する。
　以下、第４実施形態について、前述した第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。
　図８に示すように、第４実施形態の延長用ワイヤ１では、伸縮可能な管体として、樹脂層７が設けられている。
　すなわち、延長用ワイヤ１は、延長用ワイヤ本体２と、編組体６と、編組体６を基端から先端まで覆うように設けられた樹脂層７と備えている。
　延長用ワイヤ本体２は、ワイヤ本体部３で構成されている。このワイヤ本体部３は、芯線３１と、芯線３１を被覆する樹脂被覆層３２とで構成されている。この場合、芯線３１の先端部の中心部には、縮径した縮径部３１１が設けられており、図示の構成では、樹脂被覆層３２は、その縮径部３１１には設けられておらず、芯線３１の縮径部３１１よりも基端側の部分に設けられている。
　編組体６の基端部は、前記縮径部３１１に固定されている。
　また、編組体６は、樹脂層７内に埋設されている。すなわち、樹脂層７は、編組体６の内周面および外周面の基端から先端までを覆っており、その内周面および外周面の全体に固着されている。なお、図８～図１１では、本来は、編組体６は、樹脂層７で覆われており見えないが、その編組体６を示すため、樹脂層７は、上下の断面の部分を除いて記載していない。
　なお、樹脂層７は、例えば、編組体６の外周面のみを覆うように設けられていてもよい。
　また、樹脂層７の構成材料としては、伸縮可能なものであれば、特に限定されないが、例えば、天然ゴム、ブチルゴム、イソプレンゴム、ブタジエンゴム、スチレン－ブタジエンゴム、ウレタンゴム、シリコーンゴム等の各種ゴム材料や、ポリウレタン系、ポリエステル系、ポリアミド系、オレフィン系、スチレン系等の各種熱可塑性エラストマーが好ましい。なお、これらのうちの２種以上を混合して用いることもできる。
　次に、延長用ワイヤ１の作用を説明する。
　ガイドワイヤ１００の基端部に対して延長用ワイヤ１の先端部を接続し、そのガイドワイヤ１００を延長する際は、図９に示すように、延長用ワイヤ本体２の先端部または編組体６の基端部を把持し、ガイドワイヤ１００の基端部を延長用ワイヤ１の編組体６の先端からその編組体６内に挿入する。この際は、ガイドワイヤ１００の基端部により、編組体６の先端部が基端方向に押され、編組体６の先端部が延長用ワイヤ本体２に対して基端方向に移動し、編組体６は、その長手方向に収縮して外径および内径が拡径するので、ガイドワイヤ１００の基端部を編組体６内に容易かつ確実に挿入することができる。なお、樹脂層７は、伸縮可能であり、編組体６とともに変形する。
　図１０に示すように、接続状態で、延長用ワイヤ本体２を把持し、例えば、ガイドワイヤ１００に対して延長用ワイヤ１を基端方向に引っ張ると、編組体６の基端部が延長用ワイヤ本体２とともに基端方向に移動する。一方、編組体６の有効領域６２（図８参照）の先端部は、ガイドワイヤ１００とその編組体６との間の摩擦力により、ガイドワイヤ１００に保持されるか、または、ガイドワイヤ１００側に留まろうとする。これにより、編組体６がその長手方向に伸長して縮径し、これによって、編組体６がガイドワイヤ１００の外周部に密着し、ガイドワイヤ１００と編組体６との間の摩擦力が増大する。すなわち、編組体６が、その長手方向に伸長することにより縮径し、ガイドワイヤ１００の基端部を挟持する。これによって、編組体６内からガイドワイヤ１００が抜けてしまうことを確実に防止することができる。なお、樹脂層７は、編組体６とともに変形する。
　ガイドワイヤ１００の基端部から延長用ワイヤ１を取り外す際は、図１１に示すように、編組体６の先端部を把持し、ガイドワイヤ１００を編組体６に対して先端方向に引っ張る。この際、編組体６の先端部は、移動しないが、編組体６の中間部は、ガイドワイヤ１００とその編組体６との間の摩擦力によりガイドワイヤ１００の基端部に保持されているので、ガイドワイヤ１００とともに先端方向に移動する。これにより、編組体６の中間部から先端部までの部位、すなわち編組体６のガイドワイヤ１００が挿入されている部位がその長手方向に収縮して拡径し、編組体６がガイドワイヤ１００の基端部に密着した状態が解除され、ガイドワイヤ１００の基端部に対し編組体６が移動し得るようになる。これによって、ガイドワイヤ１００の基端部を編組体６内から容易かつ確実に抜き取ることができ、ガイドワイヤ１００の基端部から延長用ワイヤ１の先端部を容易かつ確実に取り外すことができる。なお、樹脂層７は、編組体６とともに変形する。
　この延長用ワイヤ１によれば、前述した第１実施形態と同様の効果が得られる。
　そして、この延長用ワイヤ１では、第１実施形態に比べて、構造を簡素化することができる。 The guide wire according to the present embodiment is connected to the distal end portion of the extension wire, and includes a flexible guide wire main body and a connection portion provided on the proximal end side of the guide wire main body. . The connecting portion is the same as the connecting portion in the first to third embodiments, and the braided body of the connecting portion is reduced in diameter by extending in the longitudinal direction so as to sandwich the distal end portion of the extension wire. In addition, as a connection part, you may use the same thing as the connection part in 4th Embodiment mentioned later.
<Fourth embodiment>
FIG. 8 is a longitudinal sectional view showing a fourth embodiment of the extension wire according to the present invention, and FIGS. 9 to 11 each show the tip of the extension wire for explaining the action of the extension wire shown in FIG. It is a side view which shows typically the inside of a part.
In the following description, the left side in FIGS. 8 to 11 is referred to as “tip”, the right side is “base end (rear end)”, the upper side is “upper”, and the lower side is “lower”. Further, in FIGS. 8 to 11, only the upper and lower cross-sectional portions of the resin layer 7 are shown in order to show the braided body 6 in an easily understandable manner.
Hereinafter, the fourth embodiment will be described focusing on the differences from the first embodiment described above, and description of similar matters will be omitted.
As shown in FIG. 8, in the wire 1 for extension of 4th Embodiment, the resin layer 7 is provided as a tube body which can be expanded-contracted.
That is, the extension wire 1 includes an extension wire main body 2, a braided body 6, and a resin layer 7 provided so as to cover the braided body 6 from the proximal end to the distal end.
The extension wire main body 2 includes a wire main body portion 3. The wire main body 3 includes a core wire 31 and a resin coating layer 32 that covers the core wire 31. In this case, a reduced diameter portion 311 having a reduced diameter is provided at the center of the distal end portion of the core wire 31, and in the illustrated configuration, the resin coating layer 32 is not provided in the reduced diameter portion 311. The core wire 31 is provided at a portion closer to the base end side than the reduced diameter portion 311.
A base end portion of the braided body 6 is fixed to the reduced diameter portion 311.
The braided body 6 is embedded in the resin layer 7. That is, the resin layer 7 covers from the proximal end to the distal end of the inner peripheral surface and outer peripheral surface of the braided body 6, and is fixed to the entire inner peripheral surface and outer peripheral surface. 8 to 11, the braided body 6 is originally covered with the resin layer 7 and cannot be seen. However, in order to show the braided body 6, the resin layer 7 is formed except for the upper and lower cross-sectional portions. Not listed.
In addition, the resin layer 7 may be provided so that only the outer peripheral surface of the braided body 6 may be covered, for example.
The constituent material of the resin layer 7 is not particularly limited as long as it can expand and contract. For example, various materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, urethane rubber, and silicone rubber Rubber materials and various thermoplastic elastomers such as polyurethane, polyester, polyamide, olefin, and styrene are preferred. Two or more of these can be mixed and used.
Next, the operation of the extension wire 1 will be described.
When the distal end portion of the extension wire 1 is connected to the proximal end portion of the guide wire 100 and the guide wire 100 is extended, as shown in FIG. 9, the distal end portion or the braided body 6 of the extension wire main body 2 is used. The proximal end portion of the guide wire 100 is inserted into the braided body 6 from the distal end of the braided body 6 of the extension wire 1. At this time, the distal end portion of the braided body 6 is pushed in the proximal direction by the proximal end portion of the guide wire 100, and the distal end portion of the braided body 6 moves in the proximal direction with respect to the extension wire main body 2. Since the body 6 contracts in the longitudinal direction to increase the outer diameter and the inner diameter, the proximal end portion of the guide wire 100 can be easily and reliably inserted into the braided body 6. The resin layer 7 can be expanded and contracted and is deformed together with the braided body 6.
As shown in FIG. 10, when the extension wire main body 2 is gripped in the connected state and the extension wire 1 is pulled in the proximal direction with respect to the guide wire 100, for example, the proximal end portion of the braided body 6 is extended. It moves together with the wire body 2 in the proximal direction. On the other hand, the distal end portion of the effective region 62 (see FIG. 8) of the braided body 6 is held by the guidewire 100 by the frictional force between the guidewire 100 and the braided body 6 or on the guidewire 100 side. Try to stay in. As a result, the braided body 6 expands in the longitudinal direction and contracts in diameter, whereby the braided body 6 comes into close contact with the outer periphery of the guidewire 100 and the frictional force between the guidewire 100 and the braided body 6 increases. To do. That is, the braided body 6 is reduced in diameter by extending in the longitudinal direction, and the proximal end portion of the guide wire 100 is clamped. As a result, it is possible to reliably prevent the guide wire 100 from coming out of the braided body 6. The resin layer 7 is deformed together with the braided body 6.
When the extension wire 1 is removed from the proximal end portion of the guide wire 100, as shown in FIG. 11, the distal end portion of the braided body 6 is gripped and the guide wire 100 is pulled with respect to the braided body 6 in the distal direction. At this time, the distal end portion of the braided body 6 does not move, but the intermediate portion of the braided body 6 is held at the proximal end portion of the guidewire 100 by the frictional force between the guidewire 100 and the braided body 6. Therefore, it moves together with the guide wire 100 in the distal direction. As a result, a portion from the middle portion to the tip portion of the braided body 6, that is, a portion where the guide wire 100 of the braided body 6 is inserted contracts in the longitudinal direction and expands in diameter. The state of close contact with the proximal end portion is released, and the braided body 6 can move with respect to the proximal end portion of the guide wire 100. Accordingly, the proximal end portion of the guide wire 100 can be easily and reliably extracted from the braided body 6, and the distal end portion of the extension wire 1 can be easily and reliably removed from the proximal end portion of the guide wire 100. The resin layer 7 is deformed together with the braided body 6.
According to the extension wire 1, the same effects as those of the first embodiment described above can be obtained.
And this extension wire 1 can simplify a structure compared with 1st Embodiment.
　以上、本発明の延長用ワイヤおよびガイドワイヤを、図示の実施形態に基づいて説明したが、本発明はこれに限定されるものではなく、各部の構成は、同様の機能を有する任意の構成のものに置換することができる。また、本発明に、他の任意の構成物が付加されていてもよい。 As described above, the extension wire and the guide wire of the present invention have been described based on the illustrated embodiment. However, the present invention is not limited to this, and the configuration of each part is an arbitrary configuration having the same function. Can be substituted. In addition, any other component may be added to the present invention.
　また、本発明は、前記各実施形態のうちの、任意の２以上の構成（特徴）を組み合わせたものであってもよい。 Further, the present invention may be a combination of any two or more configurations (features) of the above embodiments.
　本発明によれば、ワイヤに対して延長用ワイヤを容易かつ確実に着脱することができる。そして、接続部の編組体がその長手方向に伸長することにより外径および内径が縮径することで、その編組体がワイヤの基端部を挟持するので、ワイヤに接続された延長用ワイヤがそのワイヤから不本意に離脱してしまうことを防止できる。したがって産業上の利用可能性を有する。 According to the present invention, the extension wire can be easily and reliably attached to and detached from the wire. And since the outer diameter and the inner diameter are reduced by extending the braided body of the connecting portion in the longitudinal direction, the braided body sandwiches the proximal end portion of the wire, so that the extension wire connected to the wire Unintentional detachment from the wire can be prevented. Therefore, it has industrial applicability.

Claims (11)

  1. 　ガイドワイヤの基端部に接続する延長用ワイヤであって、
    　可撓性を有する延長用ワイヤ本体と、
    　前記延長用ワイヤ本体の先端側に設けられた接続部とを備え、
    　前記接続部は、前記延長用ワイヤ本体に対し、該延長用ワイヤ本体の長手方向に相対的に移動可能または伸縮可能な管体と、
    　筒状をなし、線状体を交差させて網状に形成した編組体とを有し、
    　前記編組体は、その長手方向に伸長することにより縮径して前記ガイドワイヤの基端部を挟持するよう構成されていることを特徴とする延長用ワイヤ。     An extension wire connected to the proximal end of the guide wire,
    An extension wire body having flexibility;
    A connection portion provided on the distal end side of the extension wire body,
    The connecting portion is a tube that is movable or expandable relative to the extension wire body in the longitudinal direction of the extension wire body;
    It has a tubular shape and has a braided body formed in a net shape by intersecting linear bodies,
    An extension wire, wherein the braided body is configured to be reduced in diameter by extending in a longitudinal direction thereof and to sandwich a proximal end portion of the guide wire.
  2. 　前記編組体の先端部は、前記管体に固定され、前記編組体の基端部は、前記延長用ワイヤ本体の先端部に固定されている請求項１に記載の延長用ワイヤ。 The extension wire according to claim 1, wherein a distal end portion of the braided body is fixed to the tube body, and a proximal end portion of the braided body is fixed to a distal end portion of the extension wire main body.
  3. 　前記編組体の先端部は、拡径した状態で前記管体の内面に固定され、前記編組体の基端部は、縮径した状態で固定されている請求項２に記載の延長用ワイヤ。 3. The extension wire according to claim 2, wherein a distal end portion of the braided body is fixed to an inner surface of the tubular body in an expanded state, and a proximal end portion of the braided body is fixed in a contracted state.
  4. 　前記編組体は、前記管体を前記延長用ワイヤ本体に対して基端方向に移動すると拡径し、前記管体を前記延長用ワイヤ本体に対して先端方向に移動すると縮径する請求項２に記載の延長用ワイヤ。 The diameter of the braided body is increased when the tube body is moved in the proximal direction with respect to the extension wire body, and the diameter of the braided body is reduced when the tube body is moved in the distal direction with respect to the extension wire body. Wire for extension as described in 1.
  5. 　前記延長用ワイヤ本体は、その先端側に、前記編組体を収納する筒状部を有し、
    　前記管体は、前記筒状部内に挿入可能な挿入部と、前記挿入部の先端側に設けられ、前記筒状部の内径よりも大きい外径を有する拡径部と、前記挿入部と前記拡径部との間に設けられ、前記筒状部の先端部に当接可能な当接部とを有し、前記筒状部に対して移動可能に設置されている請求項１に記載の延長用ワイヤ。     The extension wire main body has a cylindrical portion that houses the braided body on the distal end side thereof,
    The tubular body includes an insertion portion that can be inserted into the cylindrical portion, a diameter-enlarged portion that is provided on a distal end side of the insertion portion and has an outer diameter larger than an inner diameter of the cylindrical portion, the insertion portion, and the 2. The device according to claim 1, further comprising a contact portion that is provided between the enlarged diameter portion and is capable of contacting the distal end portion of the cylindrical portion, and is movably installed with respect to the cylindrical portion. Extension wire.
  6. 　前記ガイドワイヤの基端部に当該延長用ワイヤを接続する際、前記編組体内に前記ガイドワイヤの基端部が挿入され、
    　前記編組体内に前記ガイドワイヤの基端部が挿入されていない状態において、前記編組体の内径は、前記ガイドワイヤの基端部の外径よりも大きく設定されており、前記編組体内に前記ガイドワイヤの基端部が挿入されると、前記編組体が拡径するよう構成されている請求項１に記載の延長用ワイヤ。     When connecting the extension wire to the proximal end portion of the guide wire, the proximal end portion of the guide wire is inserted into the braided body,
    In a state where the proximal end portion of the guide wire is not inserted into the braided body, an inner diameter of the braided body is set larger than an outer diameter of the proximal end portion of the guide wire, and the guide is inserted into the braided body. The extension wire according to claim 1, wherein the braided body is configured to expand in diameter when a proximal end portion of the wire is inserted.
  7. 　前記線状体は、側面視において、前記編組体の中心軸に対して傾斜している請求項１に記載の延長用ワイヤ。 The wire for extension according to claim 1, wherein the linear body is inclined with respect to a central axis of the braided body in a side view.
  8. 　前記編組体は、ブレード線である請求項１に記載の延長用ワイヤ。 The wire for extension according to claim 1, wherein the braided body is a blade wire.
  9. 　前記管体は、伸縮可能であり、前記編組体を基端から先端まで覆うように設けられている請求項１に記載の延長用ワイヤ。 The extension wire according to claim 1, wherein the tube body is extendable and provided so as to cover the braided body from a base end to a tip end.
  10. 　前記管体は、ゴム材料または熱可塑性エラストマーで構成されている請求項９に記載の延長用ワイヤ。 10. The extension wire according to claim 9, wherein the tubular body is made of a rubber material or a thermoplastic elastomer.
  11. 　延長用ワイヤの先端部に接続するガイドワイヤであって、
    　可撓性を有するガイドワイヤ本体と、
    　前記ガイドワイヤ本体の基端側に設けられた接続部とを備え、
    　前記接続部は、前記ガイドワイヤ本体に対し、該ガイドワイヤ本体の長手方向に相対的に移動可能または伸縮可能な管体と、
    　筒状をなし、線状体を交差させて網状に形成した編組体とを有し、
    　前記編組体は、その長手方向に伸長することにより縮径して前記延長用ワイヤの先端部を挟持するよう構成されていることを特徴とするガイドワイヤ。
    　     A guide wire connected to the tip of the extension wire,
    A flexible guide wire body;
    A connection portion provided on the proximal end side of the guide wire body,
    The connecting portion is a tube that is movable or expandable relative to the guidewire body in the longitudinal direction of the guidewire body;
    It has a tubular shape and has a braided body formed in a net shape by intersecting linear bodies,
    The guide wire, wherein the braided body is configured so as to be reduced in diameter by extending in a longitudinal direction thereof and to sandwich a distal end portion of the extension wire.
PCT/JP2011/057415 2010-03-30 2011-03-25 Extension wire and guide wire WO2011122486A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-078880 2010-03-30
JP2010078880 2010-03-30

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02295569A (en) * 1989-04-25 1990-12-06 C R Bard Inc Guide wire
JPH06327776A (en) * 1993-05-19 1994-11-29 Siemens Ag Implantable lead

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02295569A (en) * 1989-04-25 1990-12-06 C R Bard Inc Guide wire
JPH06327776A (en) * 1993-05-19 1994-11-29 Siemens Ag Implantable lead

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