WO2014183272A1 - 与体外留置导管接驳的具有截止阀的医用输液接头 - Google Patents

与体外留置导管接驳的具有截止阀的医用输液接头 Download PDF

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Publication number
WO2014183272A1
WO2014183272A1 PCT/CN2013/075625 CN2013075625W WO2014183272A1 WO 2014183272 A1 WO2014183272 A1 WO 2014183272A1 CN 2013075625 W CN2013075625 W CN 2013075625W WO 2014183272 A1 WO2014183272 A1 WO 2014183272A1
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WIPO (PCT)
Prior art keywords
joint
joint body
inner cavity
shut
cavity
Prior art date
Application number
PCT/CN2013/075625
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English (en)
French (fr)
Inventor
陈永曦
Original Assignee
福建省百仕韦医用高分子股份有限公司
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 福建省百仕韦医用高分子股份有限公司 filed Critical 福建省百仕韦医用高分子股份有限公司
Priority to CN201380075587.6A priority Critical patent/CN105209089B/zh
Priority to PCT/CN2013/075625 priority patent/WO2014183272A1/zh
Publication of WO2014183272A1 publication Critical patent/WO2014183272A1/zh

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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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • A61M2039/2406—Check- or non-return valves designed to quickly shut upon the presence of back-pressure
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A61M2039/263—Valves closing automatically on disconnecting the line and opening on reconnection thereof where the fluid space within the valve is decreasing upon disconnection

Definitions

  • the present invention relates to a device for introducing a medium into a body, and more particularly to a medical infusion connector having a shut-off valve that is connected to an indwelling catheter.
  • the medical infusion connector consists of a connector 1 and a connector body 2 that is attached thereto.
  • This needle-connected connector body 2 is also commonly referred to as a heparin cap.
  • Infusion set needle from connector body 2 The top sealant plug is inserted.
  • the infusion tube is pulled out of the infusion set, the original space occupied by the needle tube is close to the vacuum, and a recompression occurs in the indwelling catheter.
  • the blood will flow back from the blood vessel into the indwelling catheter, and the blood will be blocked by the blood to block the indwelling catheter, and the infusion can not be re-infused. It may cause a blood clot that can cause harm to the patient. Therefore, the medical staff usually needs to take a sealed syringe with a puncture needle to rinse the indwelling catheter. When the sealing operation is performed, the syringe needle penetrates from the heparin cap rubber plug and enters the heparin cap lumen, which must occupy the heparin cap.
  • the medical staff needs to withdraw the sealing tube liquid while withdrawing the syringe needle, and fill the space occupied by the needle tube to avoid recompression in the indwelling catheter.
  • This kind of operation is cumbersome and still leaves the space that the sealing liquid can not be filled.
  • the negative pressure will still be generated.
  • it is customary to clamp the extension tube to the tube after the flow clamp is clamped.
  • the component slides in the direction, so that the extension tube is gradually squeezed, and the liquid in the extension tube is squeezed into the inner cavity of the indwelling catheter to drive out the backflow blood, but the sliding resistance is large when the stop clamp and the extension tube are clamped, and the extension tube is easily extended.
  • the tube is elongated and thinned.
  • the catheter assembly is pulled repeatedly, and the extension tube is severely broken to cause hemorrhage.
  • the catheter assembly is left and attached to the patient's body, and the length of the extension tube is limited. Be cautious, the catheter assembly will be pulled out of the patient's body. In order to avoid the above accidents, the medical staff should be cautious when operating. Sometimes the length of the stop clip is not enough, or the blood in the catheter can not be completely cleaned, so this operation is invisible. Increased the workload and psychological burden of medical staff.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a medical infusion connector with a shut-off valve that can eliminate negative pressure and is convenient to operate and is connected to an indwelling catheter.
  • the object of the present invention is achieved by the following route.
  • the medical infusion connector with a shut-off valve connected to the extracorporeal indwelling catheter comprises a connecting seat and a joint body, the front end of the connecting seat is connected with the extension tube of the indwelling catheter, and the rear end of the joint body is connected with the infusion set, and the main points of the composition are:
  • the utility model comprises a joint base, which is integrated with the connecting seat or is separately constructed but fixed to the connecting seat, and the front part of the joint body is sleeved in the inner cavity of the joint base in a pushable and retractable manner, the joint body There is a space for the joint body to be pushed between the joint base cavity or the joint body and the joint cavity or between the joint body and the joint base inner cavity and the joint cavity.
  • the joint body cavity passes through a shut-off valve
  • the connecting chamber is connected to the inner cavity, and the shut-off valve is disposed in the joint body pushing space and is closed and contacted with the corresponding inner cavity retaining wall by pushing the joint body in position.
  • the inner cavity of the joint base and the connecting seat form a closed cavity, and the volume of the closed cavity is changed by the advancement and retreat of the axial displacement of the joint body.
  • the closed cavity is enlarged; the joint body is advanced, the closed cavity is reduced, the push is advanced, and the infusion channel is cut off.
  • the joint body is retracted first, the shut-off valve is opened, the closed cavity is enlarged, and it is convenient to accommodate more liquid; when the infusion is finished, the needle tube is withdrawn, the joint body is advanced, and the closed cavity is enlarged from large to small, thereby filling the occupied by the original needle tube.
  • the medical infusion connector of the present invention can be used in either a needleless connection or a needle connection.
  • the posterior segment of the connector body is typically used to set the heparin cap or other configuration that interfaces with the infusion set.
  • the object of the present invention can also be achieved by the following means.
  • the front section of the connector body can be placed in the lumen of the connector base in a variety of ways:
  • the device for adjusting the axial displacement of the spiral has a variety of specific configurations to choose from, two of which are disclosed below, one of which is:
  • the front section of the connector body is inserted into the inner cavity of the joint base and is screwed to the joint base.
  • rotating the joint body causes the joint body to spirally rotate relative to the joint base, thereby causing the joint body to advance spirally and spirally backward relative to the joint base.
  • An inner seal is disposed in front of the joint body and the joint base screw connection section.
  • the inner cavity of the joint base is a stepped cavity with a large front and a small small space.
  • the inner wall of the large cavity is provided with a screwing internal thread and a corresponding part of the connecting seat is locked, and the inner wall of the small cavity is provided with an internal thread of the advance and retreat and the joint body can be adjusted and screwed, and the inner and the backward are connected.
  • a thread is provided before the thread, and the inner seal is installed before the shoulder, and the section corresponding to the inner seal is a cylinder.
  • Another specific configuration of the above-described apparatus for helically adjusting the axial displacement may be:
  • the front end of the joint body is recessed into a deep annular groove, and the inner leg of the annular groove is sleeved in the inner cavity with the opening of the rear part of the joint base, and the outer groove wall of the annular groove is provided with the thread and the joint base.
  • the external thread on the outer peripheral wall of the segment corresponds to a spiral connection, and the spiral connection constitutes a device for spirally adjusting the axial displacement, and the front portion of the joint body is again trapped in the inner cavity of the limit sleeve, and the rear end face of the limit sleeve is provided with a limit stop, the joint
  • the front end of the body is correspondingly provided with a limiting shoulder, the limiting sleeve is fixedly connected with the joint base, and the internal thread of the joint base opening opening downward is provided with an internal thread and a corresponding external thread of the connecting seat, the inner core of the inner cavity is downward
  • a core post is protruded, and the through hole has a through passage in the core column to communicate with the inner cavity of the joint and the inner cavity of the joint.
  • a further specific configuration of the above-described apparatus for helically adjusting the axial displacement may be:
  • the joint body is composed of a screw rod and a lifting head, and the sealing rubber plug connected to the needle tube is located at the tail end of the screw rod, and the front portion of the screw rod is inserted into the inner cavity of the lifting head and spirally connected thereto, and the screw rod is also axially limited with the joint base.
  • the position is connected, and the lifting head is sleeved in the inner cavity of the joint base so as to be slidable back and forth with respect to the joint base.
  • the spiral rotation is decomposed into idling and forward and backward movement, wherein the idling is completed by the auger, and the forward and backward movement is performed by the lifting head.
  • the inner cavity of the joint base is a stepped cavity with a large front and a small small space, and the inner wall of the large cavity is provided with a screwing internal thread and a corresponding part of the connecting seat is locked, and the inner wall of the small cavity is provided with a cylindrical hole and a lifting joint for the clearance of the lifting head, the cylindrical hole
  • the length is greater than the length of the corresponding section of the lifting head, and a shoulder is provided between the cylindrical hole and the tightening thread, and an inner seal is installed before the shoulder, and the front end of the lifting head protrudes through the inner hole of the inner sealing member Into the inner cavity of the connector.
  • the thread for achieving advance and retreat adjustment is a trapezoidal thread.
  • the front section of the joint body can also be placed in the interior of the joint base in this manner:
  • the front part of the joint body is inserted into the inner cavity of the joint base in a retractable sliding manner, and the front part of the joint body and the inner cavity of the joint base are damped by a sealing ring between the two.
  • This damped mating connection provides both a seal and a hand-feel and viscous joint body.
  • a snap device for defining a slip-in position of the joint body that is difficult to axially displace, the snap device being mounted between the joint body and the joint base cavity.
  • the snap device can be used to position the joint body so that it is not easily axially displaced.
  • the snap device has a variety of specific configurations to choose from, two of which are disclosed below, one of which is:
  • the buckle device is an elastic buckle, which is composed of a buckle, a spring, and a corresponding card slot disposed on the side wall of the joint body, and is buckled and slipped by the preload of the spring.
  • the card slot that is moved into place is stuck.
  • the elastic buckle can realize the positioning and can be disengaged under the action of the pushing and pulling force.
  • the other is:
  • the front part of the joint body is retractably slipped and rotatably inserted into the inner cavity of the joint base, and the buckle device is composed of a bayonet and a sliding groove, and the latch is exposed on the side wall of the joint body, and the sliding groove is correspondingly disposed on the joint
  • the sliding groove is composed of an axial groove and a transverse groove, and the protruding pin head is sleeved in the sliding groove, and the joint body which is moved in the axial groove is inserted into the transverse groove by rotating the sliding sleeve In the middle, it is axially engaged with the joint base.
  • the transverse grooves have a slope, but the oblique angle is smaller than the self-locking angle.
  • the inclination facilitates the introduction of the axial groove, and the smaller than the self-locking angle prevents it from sliding by itself under the action of the axial force.
  • shut-off valve Further optimization of the shut-off valve is:
  • the valve flap of the shut-off valve is located at the end of the joint body, and the sealing surface of the shut-off valve is either located on the inner wall of the joint base or on the inner wall of the joint.
  • the joint body is again a valve stem.
  • the inner cavity of the joint comprises a vertical passage and a transverse passage, and the transverse passage is located in the inner core of the joint body, the end of the joint body is smaller than the inner cavity of the joint base, and the gap between the two is used as the infusion passage to communicate with the transverse passage, and the joint body end
  • the joint base cavity or the joint cavity inner wall is a truncated cone corresponding to the pointed cone, and the conical opening of the truncated step is an infusion passage port.
  • the shut-off valve When the tapered end of the joint body is in contact with the corresponding tapered step, the shut-off valve is closed; and when the joint body is retracted, the shut-off valve is opened, and the infusion enters the taper through the vertical passage of the joint body, the transverse passage, and the radial gap.
  • the inside of the step is shrinking.
  • the inner cavity of the joint includes a vertical passage
  • the valve flap is a plurality of elastic flaps covering the end of the joint body
  • the inner cavity of the joint base or the inner wall of the joint cavity is a plurality of elastic tongue flaps
  • the step corresponding to the closed shape, the inner mouth of the step is an infusion channel, and by the contact with the step, a plurality of elastic tongues close and block the vertical passage opening of the joint body.
  • the inner cavity of the joint includes a vertical passage, the valve flap is located at the vertical passage opening of the joint body end, and the joint base cavity or the joint cavity inner wall is a sharp cone or circle protruding from the center toward the joint body.
  • the retaining wall is distributed with a plurality of infusion channels at a circumferential position around the vertical passage opening, and the tip or the truncated wall of the truncated wall protrudes into the joint body by the advancement of the joint body The channel is blocked and blocked at the vertical channel port.
  • the infusion passage on the retaining wall is located at the periphery of the vertical passage opening, that is, in the region outside the diameter of the vertical passage opening, such that when the central portion of the retaining wall is blocked in the vertical passage opening, the retaining wall The infusion channel cannot be connected to the vertical channel and is thus blocked.
  • the present invention has the following advantages over the prior art: the method of preventing negative pressure and eliminating negative pressure is simple, effective, and convenient to operate.
  • the intervention of the stop valve eliminates the negative pressure and cuts off the infusion channel, which is not only more sanitary and safe, but also ensures that the connector body must be retracted before re-infusion (otherwise the valve is closed and cannot be infused).
  • the joint body After the infusion, the joint body has a space for advancement to eliminate the negative pressure.
  • the process of gradually intercepting as the joint body advances makes the shut-off valve also function as a flow regulating valve.
  • FIG. 1 is a schematic structural view of an indwelling needle in the prior art
  • FIG. 2 is a schematic view showing the structure of an indwelling needle of a medical infusion connector with a shut-off valve connected to an indwelling catheter according to the present invention
  • FIG. 3 is a schematic structural view of a medical infusion connector with a shutoff valve connected to an indwelling catheter according to the first embodiment of the present invention in an off state;
  • FIG. 4 is a schematic structural view of a medical infusion connector with a shut-off valve connected to an indwelling catheter according to the first embodiment of the present invention in an open state;
  • FIG. 5 is a schematic structural view of a medical infusion connector having a shutoff valve connected to an indwelling catheter according to Embodiment 2 of the present invention
  • Figure 6 is the A direction view of Figure 5.
  • FIG. 7 is a schematic structural view of a medical infusion connector having a shutoff valve connected to an indwelling catheter according to Embodiment 3 of the present invention.
  • Figure 8 is a schematic view showing the structure of a medical infusion connector having a shutoff valve connected to an indwelling catheter according to a preferred embodiment of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • an indwelling needle of a medical infusion connector having a shut-off valve connected to an indwelling catheter according to the present invention is provided by a connecting seat 1 , connector body 2, connector base 3, sealant plug 5, extension tube 6, stop clip 7 and catheter assembly.
  • a medical infusion connector with a shut-off valve connected to an indwelling catheter including a connector 1 and a connector body 2 And the joint base 3, the front end of the joint is connected with the extension pipe 6 of the indwelling conduit, and the joint base 3 and the joint 1 are separately constructed but fixed to the joint 1 by a screwing screw device 32.
  • Connector body 2 The front section is inserted into the inner cavity of the joint base 3 and is screwed to the joint base 3 by an adjusting screw 31, and the joint body 2 is connected between the joint body 2 and the inner cavity of the joint base 2
  • the spiral adjusts the space for axial displacement, and the inner cavity of the joint body 2 communicates with the inner cavity of the joint through a shut-off valve 4.
  • the inner cavity is a stepped cavity with a small front and a large front.
  • the rear part of the inner wall of the large cavity is provided with an internal thread and a joint body. 2 Adjustable screw connection.
  • the step of the large small cavity joint is a stop wall.
  • the flap 41 of the shut-off valve 4 is located at the end of the joint body, and the sealing surface 42 is the retaining wall of the inner cavity of the joint base.
  • the inner chamber includes a vertical passage 23, a flap 41
  • the utility model relates to two elastic flaps which are wrapped around the end of the joint body.
  • the inner wall of the joint base is a step corresponding to the closed shape of the plurality of elastic flaps, and the small cavity of the inner mouth of the step is an infusion channel.
  • the elastic tongue is made of a soft sealing material, and a rear portion thereof is annularly wrapped around a sealing groove at the periphery of the end of the joint body 2 to form a sealing ring, so that the front portion of the joint body 2 and the joint base 3
  • the inner chamber carries a damped mating connection by means of the sealing ring.
  • the above adjustment thread is a trapezoidal thread.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a medical infusion connector having a shutoff valve connected to an indwelling catheter including a connector 1, a connector body 2, and a connector base 3
  • the connecting seat 1 is connected with the extension tube 6 of the indwelling conduit
  • the rear end of the joint body 2 is connected with the infusion set
  • the joint base 3 and the connecting seat 1 are separated, but through a screwing device 32 and the connecting seat 1 Secured.
  • the inner body of the joint body 2 communicates with the inner cavity of the joint through a shut-off valve 4, and the shut-off valve 4 is disposed at the joint body 2 It is pushed into the space and is closed by contact with the corresponding cavity stop wall by pushing the joint body 2 in place.
  • Joint base 3 The inner cavity is a stepped cavity with a small front and a large front, and the joint body 2 The front section is telescopically slidably and rotatably inserted into the large cavity, and a damped mating connection is made by a seal ring therebetween.
  • the step of the large small cavity joint is the aforementioned stop wall.
  • Valve flap of shutoff valve 4 41 Located at the end of the joint body, the sealing surface 42 is the stop wall, and the joint body 2 is the valve stem.
  • the body of the joint body 2 includes a vertical passage 23 and a transverse passage 25, and the transverse passage 25 is located at the joint body 2 In the inner core of the end, the end of the joint body 2 is smaller than the inner cavity of the joint base, and the gap 26 between the two serves as an infusion passage communicating with the transverse passage 25, and the joint body 2
  • the tip has a pointed shape, and the stopping wall is a truncated cone corresponding to the pointed cone, and the constricted opening of the truncated step is an infusion passage opening.
  • the shut-off valve When the joint body 2 When the tapered end is in contact with the corresponding tapered step, the shut-off valve is closed; and when the joint body is retracted, the shut-off valve is opened, and the infusion is via the joint body vertical passage 23, the transverse passage 25, and the radial clearance 26 And enter the conical step inside the shrinkage.
  • the buckle device is composed of a bayonet 24 and a sliding slot 33, and the latch 24 is exposed on the side wall of the joint body 2, and the sliding slot 33 correspondingly disposed on the side wall of the joint base 3 and extending through the side wall, the sliding groove 33 is composed of an axial groove and a transverse groove, and the protruding bayonet 24 is sleeved in the sliding groove 33 along the axial groove Push-over joint body 2 Abut the joint base 3 axially by turning the sliding sleeve into the transverse groove.
  • the transverse grooves have a slope, but the oblique angle is smaller than the self-locking angle.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a medical infusion connector having a shutoff valve connected to an indwelling catheter, including a connector 1, a connector body 2, and a connector base 3 , the connecting seat 1 is connected with the extension tube 6 of the indwelling conduit, the rear end of the joint body 2 is connected with the infusion set, the joint base 3 and the connecting seat 1 are separated, but through a screwing device 32 and the connecting seat 1 Secured. Between the joint body 2 and the joint base 3, there is a space for the joint body 2 to advance.
  • the inner body of the joint body 2 communicates with the inner cavity of the joint through a shut-off valve 4, and the shut-off valve 4 is disposed at the joint body 2 It is pushed into the space and is closed by contact with the corresponding cavity stop wall by pushing the joint body 2 in place.
  • the front end of the joint body 2 is recessed by a deeper annular groove, and the inner leg of the annular groove is sleeved on the joint base 3
  • the outer groove wall of the annular groove is provided with a thread corresponding to the external thread on the outer peripheral wall of the rear section of the joint base, and the screw connection constitutes the adjusting screw device 31.
  • the rear end surface of the limiting sleeve 27 is provided with a finite stop, and the front end of the joint body is correspondingly provided with a limit stop, and the limit sleeve 27 is fixed to the joint base 3.
  • Connector base 3 An internal thread is provided in the inner cavity of the front opening facing downward to be locked with the corresponding external thread of the connecting seat 1 and constitutes a screwing device 32 .
  • the inner core of the inner cavity protrudes downwardly from a core column having a through passage therein.
  • the through passage is composed of a vertical larger passage and a smaller inclined passage, and the obliquely smaller passage is inclined through the joint base 3
  • the inner cavity with the rear opening facing upward is a stop shoulder which is the aforementioned retaining wall and serves as a sealing surface 42 of the shutoff valve 4.
  • the body of the joint body 2 includes a vertical passage 23, the valve flap 41
  • a plurality of obliquely smaller passage openings are disposed at a circumferential position around the periphery of the vertical passage 23, and the joint body end is closed on the retaining wall by the advancement of the joint body 2, Cut off the vertical channel 23 Connected with a diagonally smaller channel.
  • a medical infusion connector having a shutoff valve connected to an indwelling catheter includes a connector 1, a connector body 2, and a connector base 3
  • the connecting seat 1 is connected to the extension pipe 6 of the indwelling conduit, and the joint base 3 and the connecting seat 1 are separated from each other but are fixed to the connecting seat 1 by a screwing screw device 32.
  • Connector body 2 The front section is inserted into the inner cavity of the joint base 3, and the inner cavity of the joint body 2 communicates with the inner cavity of the joint 1 through a shut-off valve 4.
  • the sealing plug 5 which is connected to the infusion needle, is located at the end of the auger 21, and the front section of the auger 21 is inserted into the inner cavity of the lifting head 22 and is spirally connected thereto, and the auger 21 is also connected with the joint base 3
  • the lifting head 22 is sleeved in the inner cavity of the joint base 3 so as to be slidable back and forth with respect to the joint base 3.
  • the inner cavity is a stepped cavity with a front large and small small, and a screwing screw device 32 is arranged on the inner wall of the large cavity to be locked with a corresponding portion of the connecting seat 1 , and a cylindrical hole and a lifting head are arranged on the inner wall of the small cavity 22
  • the clearance fit is sleeved, and the length of the cylindrical hole is greater than the length of the corresponding section of the lifting head 22, so that the lifting head 22 and even the joint body 2 have a space for helically adjusting the axial displacement.
  • Cylindrical bore and screwing screw 32 There is a shoulder between which an inner seal is mounted before the shoulder, and the front end of the lifting head projects through the inner hole of the inner seal into the inner cavity of the connecting seat 1.
  • Joint body 2 and connector body 1 have a joint body 2 In the advancing space, the shut-off valve 4 is disposed in the above-mentioned joint body pushing space and is closed to the inner wall of the connecting seat 1 by the joint body that is advanced in position.
  • the body of the joint body 2 includes a screw rod 21 inner cavity and a lifting head 22
  • the inner cavity is a vertical passage 23, and the valve flap 41 is located at the vertical passage opening of the end of the lifting head 22, and the aforementioned connecting seat 1
  • the inner cavity retaining wall is a pointed or truncated cone shape which protrudes toward the joint body in the middle direction, and the retaining wall is distributed with a plurality of infusion passages 11 at a circumferential position around the vertical passage opening, by means of the joint body 2

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  • Heart & Thoracic Surgery (AREA)
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Abstract

一种将介质引入体内的装置，特别是一种与体外留置导管接驳的具有截止阀（4）的医用输液接头，包括连接座（1）和接头体（2），连接座（1）前端与留置导管的延长管（6）接驳，接头体（2）后端与输液器接驳；还包括一种接头基座（3），所述接头基座（3）或者与连接座（1）一体构造或者分体构造但与连接座（1）固接，接头体（2）前段以可推进及后退的方式套置在接头基座（3）内腔中。所述装置具有如下特点：防止负压及消除负压的方式简单、有效、操作方便；而截止阀（4）的介入，在消除负压的同时又截止了输液通道，不但更加卫生、安全，而且从结构上确保了再次输液时必须先退后接头体（2），使得输液结束后接头体（2）具有推进的空间以消除负压。而随着接头体（2）推进而渐次截流的过程，使得截止阀（4）也具有流量调节阀的作用。

Description

与体外留置导管接驳的具有截止阀的医用输液接头 说明书
技术领域
本发明涉及一种将介质引入体内的装置，特别是一种与体外留置导管接驳的具有截止阀的医用输液接头。
背景技术
在临床医疗上，当患者需要多次输液时，通常会使用体外留置导管，人体外留置导管与输液器的驳接方式分为有针和无针驳接。现有技术中的一种有针驳接方式如图 1 所示，医用输液接头由连接座 1 以及与其固接的接头体 2 组成，这种有针驳接的接头体 2 通常又称为肝素帽。输液器针管从接头体 2 顶部的密封胶塞***。输液终了拔出输液器针管的同时，针管原占据的空间接近真空从而在留置导管内产生复压，血液会从血管倒流进留置导管内，倒流血液造成血液凝固堵塞留置导管，无法再次输液，严重的可能产生血栓，给病患造成伤害。因此，医务人员通常需要取一支带有穿刺针管的封管注射器对留置导管进行冲洗封管，封管操作时注射器针管从肝素帽胶塞穿入，进入肝素帽内腔，必然占据肝素帽内腔空间，而封管结束时，医务人员需要边撤出注射器针管边推注封管液，添补针管占据的空间，以免在留置导管内形成复压。这种操作繁琐且仍然会残留封管液最终无法填补的空间，负压仍会产生，为了弥补这种不足，习惯上在别上止流夹夹紧延长管后，需要将止流夹往导管组件方向滑动，令延长管逐渐被挤压，将延长管内液体挤入留置导管内腔，赶出倒流血液，但止流夹与延长管夹紧时滑动阻力大，拉拔延长管，易将延长管拉长变细，导管组件在留置期间，经多次拉拔，严重的会拉断延长管而造成溢血，加上导管组件留置粘贴在病患身体上，延长管长度有限，要是拉拔不慎，会将导管组件拉脱离病患身体，为了避免上述事故发生，医务人员操作时谨小慎微，有时止流夹拉拔长度不够，还是不能完全保证将导管内血液驱赶干净，故这种操作方式无形增加了医护人员工作量和心理负担。
发明内容
本发明目的在于克服现有技术的不足之处而提供一种可以消除负压且操作方便的与体外留置导管接驳的具有截止阀的医用输液接头。
本发明的目的是通过以下途径来实现的。
与体外留置导管接驳的具有截止阀的医用输液接头，包括连接座和接头体，连接座前端与留置导管的延长管接驳，接头体后端与输液器接驳，其组成要点在于：还包括一种接头基座，此接头基座或者与连接座一体构造或者分体构造但与连接座固接，接头体前段以可推进及后退的方式套置在接头基座内腔中，接头体与接头基座内腔之间或者接头体与连接座内腔之间或者接头体与接头基座内腔以及连接座内腔之间具有接头体推进的空间，接头体内腔通过一种截止阀与连接座内腔连通，此截止阀设置在上述接头体推进空间中并藉着推进到位的接头体而与对应内腔止进壁截止触接。
这样接头基座与连接座两者内腔构成一密闭型腔，利用接头体轴向推移的进退改变密闭型腔容积大小。接头体退后，密闭型腔增大；接头体推进，密闭型腔减小，推进到位，输液通道截止。输液工作时，接头体先退后，截止阀打开，密闭型腔增大，便于容纳更多液体；输液结束针管退出同时，接头体推进，密闭型腔由大变小，从而填补原针管占据的空间，防止负压或者排出导管内血液进入血管以消除负压。这种防止负压及消除负压的方式简单、有效、操作方便。而截止阀的介入，在消除负压的同时又截止了输液通道，不但更加卫生、安全，而且从结构上确保了再次输液时必须先退后接头体（否则截止阀截止，无法输液），使得输液结束后接头体具有推进的空间以消除负压。而随着接头体推进而渐次截流的过程，使得截止阀也具有流量调节阀的作用。
无论是无针接驳方式还是有针接驳方式都可以使用本发明所述的这种医用输液接头。
接头体后段一般用于设置肝素帽或其他与输液器接驳的构造。
本发明的目的还可以通过以下途径来实现。
接头体前段可以有多种方式套置在接头基座内腔中：
还包括有一种螺旋调节轴向推移的装置，藉着这种装置接头体得以以可推进及后退的方式与接头基座进行套接。
这样通过螺旋调节轴向推移的装置实现接头体相对接头基座的轴向的推移和后退。
螺旋调节轴向推移的装置有多种具体的构造可供选择，以下公开其中的两种，一种是：
接头体前段插置在接头基座内腔中并与接头基座螺旋连接。
这样，转动接头体让接头体相对接头基座螺旋转动，从而让接头体相对接头基座螺旋式前进和螺旋式后退。
接头体与接头基座螺旋连接段的前方设置有一种内密封件。
接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置进退内螺纹与接头体可调节螺旋连接，进退内螺纹之前设置有一种挡肩，内密封件安装在此挡肩之前，接头体与此内密封件对应的段落是一种圆柱。
上述螺旋调节轴向推移的装置的另一种具体构造可以是：
接头体前端头内凹一较深的环形槽，此环形槽内侧的芯柱滑套在接头基座后段开口朝上的内腔中，此环形槽的外槽壁设置螺纹与接头基座后段外周壁上的外螺纹对应螺旋连接，该螺旋连接组成螺旋调节轴向推移的装置，而接头体前段又陷落在限位套的内腔中，限位套后端面设置有限位止口，接头体前端对应设置限位挡肩，限位套与接头基座固接，接头基座前段开口朝下的内腔中设置内螺纹与连接座的对应外螺纹锁接，该内腔中芯向下突伸一芯柱，此芯柱内中具有贯穿通道分别与与接头体内腔以及连接座内腔连通。
上述螺旋调节轴向推移的装置的再一种具体构造可以是：
接头体由螺旋杆和升降头组成，与针管接驳的密封胶塞位于螺旋杆尾端，螺旋杆前段插置在升降头内腔中并与其螺旋连接，螺旋杆还与接头基座轴向限位连接，升降头以可相对接头基座前后滑移的方式套置在接头基座的内腔中。
这样，由于螺旋杆被轴向限位，螺旋转动被分解成空转和前后移动，其中空转由螺旋杆完成，前后移动则由升降头完成。
接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置圆柱孔与升降头间隙配合套接，该圆柱孔长度大于升降头对应段落的长度，圆柱孔与旋紧螺纹之间具有一挡肩，一种内密封件安装在此挡肩之前，升降头的前端穿过此该内密封件的内孔突伸入连接座内腔中。
上述实现进退调节的螺纹最好是一种梯形螺纹。
除了螺旋调节轴向推移的装置以外，接头体前段还可以以这种方式套置在接头基座内腔中：
接头体前段以可伸缩滑移方式插置在接头基座内腔中，接头体前段与接头基座内腔藉着二者之间的密封圈进行带有阻尼的配合连接。
这种带有阻尼的配合连接既可以实现密封，也可以增强手感并可粘滞接头体。
还包括有一种用于限定滑移到位的接头体难以再轴向移位的卡扣装置，此卡扣装置安装在接头体与接头基座内腔之间。
无论是退后还是推进的接头体，一旦滑移到位，在下次输液作业之前希望不再滑动该接头体，卡扣装置可用于定位接头体使其不易自行轴向移位。
这种卡扣装置有多种具体的构造可供选择，以下公开其中的两种，一种是：
卡扣装置是一种弹性卡扣，由嵌置在接头基座侧壁上的卡扣、弹簧以及对应设置在接头体侧壁上的卡槽组成，藉着弹簧的预紧力卡扣与滑移到位的卡槽卡接。
这种弹性卡扣即可实现定位，又可在推拉力的作用下脱离卡接。
另一种是：
接头体前段以可伸缩滑移且可转动方式插置在接头基座内腔中，卡扣装置由卡销及滑动槽组成，卡销突露在接头体侧壁上，滑动槽对应设置在接头基座内腔侧壁上，滑动槽由轴向槽和横向槽组成，突露的卡销头滑套在滑动槽中，沿着轴向槽推移到位的接头体藉着转动滑套入横向槽中而与接头基座轴向卡接。
横向槽具有斜度，但斜角小于自锁角。
斜度便于导引入轴向槽，而小于自锁角可防止其在轴向力的作用下自行滑动。
关于截止阀的进一步优化是：
截止阀的阀瓣位于接头体端头，截止阀密封面或者位于接头基座内腔止进壁上或者位于连接座内腔止进壁上。
这样，接头体又是阀杆。
进一步优化可以是以下几种具体构造：
接头体内腔包括竖向通道和横向通道，横向通道位于接头体端部内芯中，接头体端部小于接头基座内腔，二者之间的间隙作为输液通道与横向通道连通，接头体端头呈一种尖锥形，接头基座内腔或者连接座内腔止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
当接头体尖锥形端头与对应的锥形台阶触接时，截止阀闭合；而当接头体后退，截止阀开启，输液经由接头体竖向通道、横向通道、径向间隙而进入锥形台阶内缩口。
接头体内腔包括竖向通道，阀瓣是一种包覆在接头体端头的复数个弹性舌瓣，接头基座内腔或者连接座内腔止进壁是一种与该复数个弹性舌瓣闭合形状对应的台阶，台阶内口是输液通道，藉着与该台阶的触接，复数个弹性舌瓣闭合并封堵截止在接头体竖向通道口。
这样，接头体推进到位，弹性舌瓣闭合，截止阀截止；接头体后退抬起，弹性舌瓣因自身弹性而打开，截止阀开启。
接头体内腔包括竖向通道，阀瓣位于接头体端头的竖向通道口，接头基座内腔或者连接座内腔止进壁是一种中部往接头体方向突凸的尖锥形或圆台形，该止进壁在竖向通道口***的圆周位置上分布有复数个输液通道，藉着接头体的推进，该尖锥形或圆台形的止进壁突凸中部伸入到接头体竖向通道并封堵截止在该竖向通道口。
由于止进壁上的输液通道位于竖向通道口的***，即位于竖向通道口口径以外的区域，这样，当止进壁突凸中部封堵在竖向通道口时，该止进壁上的输液通道无法与竖向通道连通，从而被截止。
综上所述，本发明相比现有技术具有如下优点：防止负压及消除负压的方式简单、有效、操作方便。而截止阀的介入，在消除负压的同时又截止了输液通道，不但更加卫生、安全，而且从结构上确保了再次输液时必须先退后接头体（否则截止阀截止，无法输液），使得输液结束后接头体具有推进的空间以消除负压。而随着接头体推进而渐次截流的过程，使得截止阀也具有流量调节阀的作用。
附图说明
图 1 是现有技术中一种留置针的结构示意图
图 2 是使用本发明所述与体外留置导管接驳的具有截止阀的医用输液接头的留置针结构示意图
图 3 是本发明实施例一所述与体外留置导管接驳的具有截止阀的医用输液接头在截止状态的的结构示意图
图 4 是本发明实施例一所述与体外留置导管接驳的具有截止阀的医用输液接头在开启状态的结构示意图
图 5 是本发明实施例二所述与体外留置导管接驳的具有截止阀的医用输液接头的结构示意图
图 6 是图 5 的 A 向视图
图 7 是本发明实施例三所述与体外留置导管接驳的具有截止阀的医用输液接头的结构示意图
图 8 是本发明最佳实施例所述与体外留置导管接驳的具有截止阀的医用输液接头的结构示意图。
标号说明
1 连接座 11 输液通道 2 接头体 21 螺旋杆 22 升降头 23 竖向通道 24 卡销 25 横向通道 26 间隙 27 限位套
3 接头基座 31 调节螺旋装置 32 旋紧螺旋装置 33 滑动槽 4 截止阀 41 阀瓣 42 密封面 5 密封胶塞 6 延长管 7 止流夹 8 导管组件 9 接头外套。
具体实施方式
实施例一：
参照图 2 ，一种使用本发明所述与体外留置导管接驳的具有截止阀的医用输液接头的留置针，由连接座 1 、接头体 2 、接头基座 3 、密封胶塞 5 、延长管 6 、止流夹 7 和导管组件组成。
参照图 3 和图 4 ，与体外留置导管接驳的具有截止阀的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 前段插置在接头基座 3 内腔中并通过一种调节螺旋装置 31 与接头基座 3 螺旋连接，接头体 2 与接头基座 3 内腔之间之间具有接头体 2 螺旋调节轴向推移的空间，接头体 2 内腔通过一种截止阀 4 与连接座内腔连通。接头基座 3 内腔为一种前小后大的阶梯型腔，大型腔内壁后段设置进退内螺纹与接头体 2 可调节螺旋连接。大小型腔接合部的台阶是一种止进壁。截止阀 4 的阀瓣 41 位于接头体端头，密封面 42 即是接头基座内腔的该止进壁。接头体 2 内腔包括竖向通道 23 ，阀瓣 41 是一种包覆在接头体端头的两个弹性舌瓣，接头基座内腔止进壁是一种与该复数个弹性舌瓣闭合形状对应的台阶，台阶内口的小型腔是输液通道，藉着与该台阶的触接，两个弹性舌瓣闭合并封堵截止在接头体竖向通道 23 口。此弹性舌瓣由软质密封材料制成，其后段呈环状环围固定在接头体 2 端部***的密封槽中并形成一种密封圈，从而让接头体 2 前段与接头基座 3 内腔藉着该密封圈进行带有阻尼的配合连接。上述调节螺纹是一种梯形螺纹。
本实施例未述部分与现有技术相同。
实施例二：
参照图 5 ，与体外留置导管接驳的具有截止阀的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座 1 前端与留置导管的延长管 6 接驳，接头体 2 后端与输液器接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 与接头基座 3 内腔之间具有接头体 2 推进的空间，接头体 2 内腔通过一种截止阀 4 与连接座内腔连通，此截止阀 4 设置在上述接头体 2 推进空间中并藉着推进到位的接头体 2 而与对应内腔止进壁截止触接。接头基座 3 内腔为一种前小后大的阶梯型腔，接头体 2 前段以可伸缩滑移且可转动方式插置在该大型腔中，并藉着二者之间的密封圈进行带有阻尼的配合连接。大小型腔接合部的台阶就是前述的止进壁。截止阀 4 的阀瓣 41 位于接头体端头，密封面 42 就是该止进壁，接头体 2 又是阀杆。接头体 2 内腔包括竖向通道 23 和横向通道 25 ，横向通道 25 位于接头体 2 端部内芯中，接头体 2 端部小于接头基座内腔，二者之间的间隙 26 作为输液通道与横向通道 25 连通，接头体 2 端头呈一种尖锥形，前述止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口。
当接头体 2 尖锥形端头与对应的锥形台阶触接时，截止阀闭合；而当接头体后退，截止阀开启，输液经由接头体竖向通道 23 、横向通道 25 、径向间隙 26 而进入锥形台阶内缩口。
参照图 6 ，卡扣装置由卡销 24 及滑动槽 33 组成，卡销 24 突露在接头体 2 侧壁上，滑动槽 33 对应设置在接头基座 3 内腔侧壁上并贯穿侧壁，滑动槽 33 由轴向槽和横向槽组成，突露的卡销 24 头滑套在滑动槽 33 中，沿着轴向槽推移到位的接头体 2 藉着转动滑套入横向槽中而与接头基座 3 轴向卡接。横向槽具有斜度，但斜角小于自锁角。
本实施例未述部分与实施例一相同。
实施例三：
参照图 7 ，与体外留置导管接驳的具有截止阀的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座 1 前端与留置导管的延长管 6 接驳，接头体 2 后端与输液器接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 与接头基座 3 内腔之间具有接头体 2 推进的空间，接头体 2 内腔通过一种截止阀 4 与连接座内腔连通，此截止阀 4 设置在上述接头体 2 推进空间中并藉着推进到位的接头体 2 而与对应内腔止进壁截止触接。接头体 2 前端头内凹一较深的环形槽，此环形槽内侧的芯柱滑套在接头基座 3 后段开口朝上的内腔中，此环形槽的外槽壁设置螺纹与接头基座后段外周壁上的外螺纹对应螺旋连接，该螺旋连接组成调节螺旋装置 31 。而接头体 2 前段又陷落在限位套 27 的内腔中，限位套 27 后端面设置有限位止口，接头体前端对应设置限位挡肩，限位套 27 与接头基座 3 固接。接头基座 3 前段开口朝下的内腔中设置内螺纹与连接座 1 的对应外螺纹锁接并组成旋紧螺旋装置 32 。该内腔中芯向下突伸一芯柱，此芯柱内中具有贯穿通道，此贯穿通道由竖向较大通道以及斜向的较小通道组成，斜向较小通道倾斜贯穿接头基座 3 后段开口朝上的内腔，贯穿处为一挡肩，此挡肩为前述的止进壁并作为截止阀 4 的密封面 42 。接头体 2 内腔包括竖向通道 23 ，阀瓣 41 为接头体端头，共有复数个斜向较小通道口设置在该竖向通道 23 口***的圆周位置上，藉着接头体 2 的推进，该接头体端头盖合在止进壁上，截止了竖向通道 23 与斜向较小通道的连通。
本实施例未述部分与实施例一相同。
最佳实施例：
参照图 8 ，与体外留置导管接驳的具有截止阀的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座 1 前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 分体构造但通过一种旋紧螺旋装置 32 与连接座 1 固接。接头体 2 前段插置在接头基座 3 内腔中，接头体 2 内腔通过一种截止阀 4 与连接座 1 内腔连通。接头体 2 由螺旋杆 21 和升降头 22 组成，与输液针管接驳的密封胶塞 5 位于螺旋杆 21 尾端，螺旋杆 21 前段插置在升降头 22 内腔中并与其螺旋连接，螺旋杆 21 还与接头基座 3 轴向限位连接，升降头 22 以可相对接头基座 3 前后滑移的方式套置在接头基座 3 的内腔中。接头基座 3 内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧螺旋装置 32 与连接座 1 对应部分锁接，小型腔内壁设置圆柱孔与升降头 22 间隙配合套接，该圆柱孔长度大于升降头 22 对应段落的长度，从而使升降头 22 乃至接头体 2 具有螺旋调节轴向推移的空间。圆柱孔与旋紧螺旋装置 32 之间具有一挡肩，一种内密封件安装在此挡肩之前，升降头的前端穿过此该内密封件的内孔突伸入连接座 1 内腔中。接头体 2 与连接座 1 内腔之间具有接头体 2 推进的空间，截止阀 4 设置在上述接头体推进空间中并藉着推进到位的接头体而与连接座 1 内腔止进壁截止触接。接头体 2 内腔包括螺旋杆 21 内腔和升降头 22 内腔，都是竖向通道 23 ，阀瓣 41 位于升降头 22 端头的竖向通道口，前述连接座 1 内腔止进壁是一种中部往接头体方向突凸的尖锥形或圆台形，该止进壁在竖向通道口***的圆周位置上分布有复数个输液通道 11 ，藉着接头体 2 的推进，该尖锥形或圆台形的止进壁突凸中部伸入到接头体竖向通道 23 并封堵截止在该竖向通道口。由于止进壁上的输液通道 11 位于竖向通道口的***，即位于竖向通道口口径以外的区域，这样，当止进壁突凸中部封堵在竖向通道口时，该止进壁上的输液通道 11 无法与竖向通道 23 连通，从而被截止。
本实施例未述部分与实施例一相同。

Claims (16)

  1. 与体外留置导管接驳的具有截止阀的医用输液接头，包括连接座和接头体，连接座前端与留置导管的延长管接驳，接头体后端与输液器接驳，其特征在于，还包括一种接头基座，此接头基座或者与连接座一体构造或者分体构造但与连接座固接，接头体前段以可推进及后退的方式套置在接头基座内腔中，接头体与接头基座内腔之间或者接头体与连接座内腔之间或者接头体与接头基座内腔以及连接座内腔之间具有接头体推进的空间，接头体内腔通过一种截止阀与连接座内腔连通，此截止阀设置在上述接头体推进空间中并藉着推进到位的接头体而与对应内腔止进壁截止触接。
  2. 根据权利要求 1 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，还包括有一种螺旋调节轴向推移的装置，藉着这种装置接头体得以以可推进及后退的方式与接头基座进行套接。
  3. 根据权利要求 2 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体前段插置在接头基座内腔中并与接头基座螺旋连接。
  4. 根据权利要求 3 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置进退内螺纹与接头体可调节螺旋连接，进退内螺纹之前设置有一种挡肩，内密封件安装在此挡肩之前，接头体与此内密封件对应的段落是一种圆柱。
  5. 根据权利要求 2 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体前端头内凹一较深的环形槽，此环形槽内侧的芯柱滑套在接头基座后段开口朝上的内腔中，此环形槽的外槽壁设置螺纹与接头基座后段外周壁上的外螺纹对应螺旋连接，该螺旋连接组成螺旋调节轴向推移的装置，而接头体前段又陷落在限位套的内腔中，限位套后端面设置有限位止口，接头体前端对应设置限位挡肩，限位套与接头基座固接，接头基座前段开口朝下的内腔中设置内螺纹与连接座的对应外螺纹锁接，该内腔中芯向下突伸一芯柱，此芯柱内中具有贯穿通道分别与与接头体内腔以及连接座内腔连通。
  6. 根据权利要求 2 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体由螺旋杆和升降头组成，与针管接驳的密封胶塞位于螺旋杆尾端，螺旋杆前段插置在升降头内腔中并与其螺旋连接，螺旋杆还与接头基座轴向限位连接，升降头以可相对接头基座前后滑移的方式套置在接头基座的内腔中。
  7. 根据权利要求 6 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置圆柱孔与升降头间隙配合套接，该圆柱孔长度大于升降头对应段落的长度，圆柱孔与旋紧螺纹之间具有一挡肩，一种内密封件安装在此挡肩之前，升降头的前端穿过此该内密封件的内孔突伸入连接座内腔中。
  8. 根据权利要求 1 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体前段以可伸缩滑移方式插置在接头基座内腔中，接头体前段与接头基座内腔藉着二者之间的密封圈进行带有阻尼的配合连接。
  9. 根据权利要求 2 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体前段以可伸缩滑移方式插置在接头基座内腔中，接头体前段与接头基座内腔藉着二者之间的密封圈进行带有阻尼的配合连接，还包括有一种用于限定滑移到位的接头体难以再轴向移位的卡扣装置，此卡扣装置安装在接头体与接头基座内腔之间。
  10. 根据权利要求 9 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，卡扣装置是一种弹性卡扣，由嵌置在接头基座侧壁上的卡扣、弹簧以及对应设置在接头体侧壁上的卡槽组成，藉着弹簧的预紧力卡扣与滑移到位的卡槽卡接。
  11. 根据权利要求 9 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体前段以可伸缩滑移且可转动方式插置在接头基座内腔中，卡扣装置由卡销及滑动槽组成，卡销突露在接头体侧壁上，滑动槽对应设置在接头基座内腔侧壁上，滑动槽由轴向槽和横向槽组成，突露的卡销头滑套在滑动槽中，沿着轴向槽推移到位的接头体藉着转动滑套入横向槽中而与接头基座轴向卡接。
  12. 根据权利要求 11 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，横向槽具有斜度，但斜角小于自锁角。
  13. 根据权利要求 1 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，截止阀的阀瓣位于接头体端头，截止阀密封面或者位于接头基座内腔止进壁上或者位于连接座内腔止进壁上。
  14. 根据权利要求 1 或 13 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体内腔包括竖向通道和横向通道，横向通道位于接头体端部内芯中，接头体端部小于接头基座内腔，二者之间的间隙作为输液通道与横向通道连通，接头体端头呈一种尖锥形，接头基座内腔或者连接座内腔止进壁是一种与该尖锥形对应的圆台形台阶，该圆台形台阶的内缩口是输液通道口，当接头体尖锥形端头与对应的锥形台阶触接时，截止阀闭合，而当接头体后退，截止阀开启，输液经由接头体竖向通道、横向通道、径向间隙而进入锥形台阶内缩口。
  15. 根据权利要求 13 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体内腔包括竖向通道，阀瓣是一种包覆在接头体端头的复数个弹性舌瓣，接头基座内腔或者连接座内腔止进壁是一种与该复数个弹性舌瓣闭合形状对应的台阶，台阶内口是输液通道，藉着与该台阶的触接，复数个弹性舌瓣闭合并封堵截止在接头体竖向通道口。
  16. 根据权利要求 13 所述的与体外留置导管接驳的具有截止阀的医用输液接头，其特征在于，接头体内腔包括竖向通道，阀瓣位于接头体端头的竖向通道口，接头基座内腔或者连接座内腔止进壁是一种中部往接头体方向突凸的尖锥形或圆台形，该止进壁在竖向通道口***的圆周位置上分布有复数个输液通道，藉着接头体的推进，该尖锥形或圆台形的止进壁突凸中部伸入到接头体竖向通道并封堵截止在该竖向通道口。
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