JP6086545B2 - Catheter connector - Google Patents

Description

  The present invention relates to a catheter connector that is detachably connected to a proximal end portion of a catheter.

  For example, when connecting an epidural catheter to a syringe or the like, as a connector to be detachably connected to the proximal end of the catheter, a clamping ring having rubber elasticity is sandwiched between the connector body and the connector cap, and the clamping is performed. The catheter is passed by passing the catheter through the hole in the ring, bringing the connector body and the connector cap close together by tightening means such as screws provided on both the connector body and the connector cap, crushing the tightening ring, and shrinking the inner diameter of the ring. A fixed connection (for example, Patent Document 1) or a component ring that has almost the same component structure as the connector, but a clamping ring sandwiched between a connector main body (clamp main body) and a connector cap (clamp lid) ( Clamp instead of screw as a tightening means to crush the clamp bush) Using a bar, with the connecting part between the clamp lid and clamp lever as a fulcrum, the grooved guide provided on the clamp lever is engaged with the protrusion provided on the clamp body, and the clamp body is pivoted. There is a catheter clamp adapter (Patent Document 2) that moves in the direction and compresses the clamp bush.

  However, these catheter connectors may be used for a long period of time, such as continuous epidural anesthesia, and will continue to be pulled toward the distal end side depending on the usage situation, so that the connector connections (the previous tightening) The catheter may come off from the ring portion), resulting in inconveniences such as leakage of the chemical solution.

  Therefore, as a catheter connector to solve this inconvenience, a catheter holding means such as a reel portion for winding the catheter connected to the connector once or more than once is provided on the connector side portion, and the proximal side of the catheter is provided on this. There has been proposed a catheter holding adapter (Patent Document 3) that prevents loops from slipping out.

JP 54-21087 A Special table 2010-530772 Japanese Patent Laid-Open No. 3-165783

According to the catheter connector of Patent Document 3, the force pulled to the distal end side of the catheter is not directly applied to the connecting portion between the catheter and the connector, and the pulling force in the pulling direction to the connecting portion is reduced. The removal of the catheter can be prevented.
However, in the patent document, a looped catheter is snapped and held in a holding groove, but there is a concern that the catheter may be detached from the groove simply by being hooked on the groove. For example, some catheters, such as fluororesins, have a large elastic restoring force depending on the material, and even if they are wound and inserted into the groove, the force that bulges outward is large, and the catheter may come off the groove. Moreover, even if it is snapped, the possibility of coming off due to an external force in an unintended direction during use cannot be excluded.
In addition, in the same document, as a catheter holding means, a means is described in which a loop portion is sandwiched and closed by a lid-like jaw, and according to this, the concern about detachment of the catheter from the holding means is extremely reduced, When handling the connector, for example, it is necessary to open and close the lid when attaching and detaching the catheter, and the configuration of the connector is complicated.

  Accordingly, an object of the present invention is to provide a catheter connector that can prevent the catheter and the connector from coming off and is easy to handle and easy to handle.

The catheter connector of the present invention is a connector for detachably connecting the proximal end portion of the catheter, and is provided with a passage for winding the proximal side of the catheter around the side surface of the connector to serve as a means for preventing the catheter from being removed. As disconnection preventing means, there are provided a folding groove portion that opens toward the outer side that becomes the folded portion of the catheter toward the distal end side of the connector , and a pair of passage groove portions that open toward the inside that becomes the reciprocating passage of the catheter to the folded portion . Configured.

Further, as the configuration of the above-mentioned removal prevention means, a folding claw that opens outward to form the folding groove and a pair of passage claw that opens inward to form the passage groove are provided on the base surface . .

Then, the pair of passages nail outer diameter equal to or catheter passed, with so as to face a gap you slightly larger.

  Furthermore, it is preferable to provide a detachable seal tape that is wound around at least a part of the folded groove portion around the circumferential direction of the connector.

(Function)
The catheter connector of the above means is that the pulling force from the distal end side of the catheter is not directly transmitted to the connector-catheter connection portion by the means for preventing the catheter from coming off, so that the catheter can be used even for a long time such as continuous epidural anesthesia. Omission can be prevented. In addition, since the pair of opposed channel grooves are opened inward, even the catheter made of a material having a large elastic repulsive force is restricted from spreading outward. Since the force to open is applied, even if there is an opening on the inside, the catheter does not come out of the passage groove. As a result, the catheter can be more reliably prevented from coming off the connector.
In addition, the catheter is set in the groove prevention means only by attaching the catheter in a loop shape, and because the structure does not require an opening / closing part such as a lid, the structure is simple, and it can be attached and removed. Easy to use.

  Furthermore, the passage claws of the reciprocating passage are arranged facing each other, and the gap is formed to be equal to or slightly larger than the outer diameter of the catheter, so that the passage is more secure without being physically removed unless the catheter is intentionally removed. Disengagement from the groove can be prevented.

  In addition, after the catheter is wound around the disconnection prevention means, when the sealing tape is wound in a mode including a part of the folded groove portion around the connector, the folded groove that opens outward is covered with the seal tape, The catheter which is going to spread outward is regulated, and the catheter can be prevented from bulging or coming off from the folded groove. As described above, the catheter can be prevented from coming off from the disconnection preventing means, and as a result, the catheter can be prevented from coming off from the connector connecting portion.

  According to the above means, it is possible to provide a catheter connector that is prevented from coming off at the connecting portion between the catheter and the connector and that is easy to structure and easy to use.

BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram of the catheter connector of embodiment of this invention. The side view of the state which opened the clamp lever of the said form, and a bottom view. Side surface sectional drawing of the state which closed the clamp lever of the said form. The perspective view and side view of the clamp main body of the said form. The tightening ring of the said form. The perspective view and side view of the clamp cap of the said form. The perspective view and side view of the clamp lever of the said form. The perspective view and bottom view at the time of applying a catheter to the said form. The bottom view at the time of winding a sealing tape in the said form.

Hereinafter, embodiments of the catheter connector of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall configuration diagram of the present embodiment, FIG. 2 is a side view in which A is in a state where the clamp lever of the above-described form is opened, and B is a bottom view. FIG. 3 shows a cross-sectional view from the side in a state where the clamp lever of this embodiment is closed.

The catheter connector of this embodiment is used as a connector for connecting a device (syringe or the like) for injecting an anesthetic or the like to the catheter by connecting to the proximal end portion of the epidural anesthesia catheter. It consists of each part.
A cylindrical ring housing cylinder portion 12 provided with a pivot shaft 14 projecting in the width direction at a position opposite to the inner cavity and the side surface housing the tightening ring 4 provided on the front end side, and provided on the rear end side; The clamp main body 1 which consists of the main stapler 11 provided in the middle of the said ring accommodating cylinder part 12 and the female stapler part 11 for connecting to an injection device.
A tightening ring 4 having rubber elasticity to be accommodated in the inner cavity 13 of the clamp body 1.
An inner cylinder 21 that compresses the tightening ring 4 together with the clamp body 1, an outer cylinder 22 that is provided on the outer extension of the inner cylinder 21, and includes a slit 24 that serves as a passage for the rotation shaft 14 of the clamp body 1; A clamp cap 2 including a blade 25 provided with a contact portion 26 that extends in the width direction of the proximal side of the outer cylinder 22 and serves as a contact portion with the pressing portion 32 of the clamp lever 3 to be described later.
A clamp formed by a bearing hook 31 serving as a fitting portion to the rotating shaft 14 provided in the clamp body 1, a pressing portion 32 for moving the clamp cap 2, and a gripping portion 33 serving as a lever operating portion. Lever 3
A folding groove 53 from the distal end side of the connector, which is provided integrally with the bottom surface of the clamp cap 2 and wraps the catheter 7 to form a loop-shaped passage, and a reciprocating passage to the folding groove 53 A catheter holding plate 5 which is provided with a reciprocating groove 55 and serves as a means for preventing the catheter from coming out of the connector.
A sealing tape 8 wound around the connector at a position including a part of the folded groove 53 after the catheter 7 is wound around the catheter holding plate 5.

A detailed description will be given to each of the above parts. 4A and 4B show a clamp body of the present embodiment, in which A is a perspective view and B is a side view.
The clamp body 1 is configured by attaching a cap 6 to a female luer taper portion 11 for connecting a syringe or the like on the rear end side, and has a lumen that matches the outer diameter of the tightening ring 4 on the distal end side and inserts the distal end. Formed as a cylindrical ring housing cylinder portion 12 serving as a mouth 13, a pivot shaft 14 for pivoting the clamp lever 3 is disposed in a width direction at a position symmetrical to the side surface on the front end side of the ring housing cylinder portion 12. It was made to protrude and be configured. An intermediate portion between the luer taper portion 11 and the ring housing cylinder portion 12 is a clamp body base portion 15, and the clamp body base portion 15 holds a bottom portion of the tightening ring 4 in a lumen communicating with the ring housing tube portion 12. A clamping ring fastening portion 16 having a step for the purpose, a catheter end receiving portion 17 formed in a tapered shape for retaining a catheter end protruding through the through hole 41 of the clamping ring 4, and an end thereof When the clamp lever 171 is provided, and when the clamp lever 3 in which the catheter is connected is completely closed, a locking hook 18 serving as a connection fixing means with the clamp lever 3 is provided, The clamp body 1 was formed by forming integrally.
The clamp body 1 is formed of a transparent or translucent resin so that it can be visually confirmed from the outside that the base end of the catheter is inserted to the position of the catheter fastening portion 171 of the predetermined catheter end accommodating portion 17. Furthermore, the periphery of the accommodating portion is formed as an opening portion 170 so that the catheter end accommodating portion 17 can be easily seen.

FIG. 5 is a partial cross-sectional view showing the tightening ring of the present embodiment.
The tightening ring 4 is formed of a resin having rubber elasticity and includes a through hole 41 through which a catheter can be inserted, and is formed in a cylindrical shape whose outer diameter is adapted to the inner diameter of the ring housing cylinder portion 12 of the clamp body 1. Then, after the catheter is inserted, the inner diameter of the through hole 41 is reduced by being crushed by the clamp body 1 and the clamp cap 2, and the catheter is brought into a connected state by being fastened and fixed.

FIG. 6 shows the clamp cap of this embodiment, wherein A is a perspective view seen from above, B is a front view, and C is a perspective view seen from below.
The clamp cap 2 includes a through-hole 210 through which a catheter can pass, and is inserted into the inner cavity of the ring housing tube portion 12 of the clamp body 1 to be a compression portion to the tightening ring 3, An outer cylinder 22 that accommodates the ring accommodating cylinder portion 12 of the clamp body 1 is provided in an extension that is coaxial with the cylinder 21, and clamped at a position symmetrical to the side surface of the outer cylinder 22 when combined with the clamp body 1. A slit 24 is provided to project the rotating shaft 14 of the main body 1 and restrict the movement of the clamp main body 1 and the clamp cap 2 in the axial direction. The inner cylinder 21 and the outer cylinder 22 are connected and integrated so as to be folded back at the distal end portion 23.
A wing 25 is provided on the rear end side of the outer cylinder 22 so as to extend over both sides in the width direction across the slit 24. The wing 25 is rotated by the clamp lever 3 to be described later. As a contact portion 26 for moving the entire clamp ring 2 in the axial direction, the surface on the clamp lever 3 side is sandwiched between the slit 24 on the upper surface of the blade 25 and the first portion is pressed. The contact surface 26a and the back surface are formed as a second contact surface 26b, and the space between the first and second contact surfaces 26a and 26b is formed as a space 27 communicating with the slit 24, so that the clamp cap 2 is movable. The compression means for the tightening ring 4 and the temporary fixing means for temporarily stopping the rotation of the clamp lever 3 are provided.

  A catheter holding plate 5 is integrally provided at the bottom of the clamp cap 2 so that the proximal side of the connected catheter is wound in a loop shape to prevent the catheter from coming off. This catheter holding plate 5 is formed in a manner in which a groove is formed in the plate-like base 51 set on the opposite surface to which the clamp lever 3 of the clamp cap 2 is attached. A folding claw 52 that opens outward is provided at a position that becomes a folding portion, and a gap with the base 51 serves as a folding groove 53, and a passage that opens inward at a position that serves as a reciprocating passage to the folding groove 53. Claws 54a and 54b are provided, and the gap with the base 51 is used as passage grooves 55a and 55b to prevent the catheter from being wound.

  Further, the forward claw 54a and the return claw 54b of the passage claw 54 are disposed to face each other inward, and in this example, the claw 54 is formed continuously from the wing portion 25 of the clamp cap 2. . The distance between the opposing passage claws 54a and 54b is the same as or slightly larger than the outer diameter of the applied catheter (outer diameter 0.8 to 1.0 mm in the case of a general continuous epidural catheter). (1.0 mm in this example).

FIG. 7 shows the clamp lever of this embodiment, A is a perspective view, and B is a side view.
The clamp lever 3 is engaged with the rotation shaft 14 of the clamp body 1 and connected so as to be capable of rotating with the clamp cap 2 interposed therebetween, and the contact portion 26 of the clamp cap 2. A pressing portion 32 having a corner portion formed in an appropriate curved shape so as to move the clamp cap 2 in the axial direction when the catheter is connected, and the clamp lever 3 is clamped. The gripping portion 33 that is an operation portion for rotating the lever from the open state where it is separated from the main body 1 to the closed state where the lever is in contact with the clamp main body, and a completely closed state The clamp lever 3 is configured by providing a latching portion 34 serving as a connection fixing means that engages with the locking hook 18 of the clamp body 1 and integrally forming them.

The clamp body 1, the clamp cap 2 including the catheter holding means, and the clamp lever 3 are connected and integrated as follows.
After the clamping ring 4 is inserted into the ring housing cylinder portion 12 of the clamp body 1, the clamping ring 4 is clamped between the inner cylinder 21 of the clamp cap 2 and the rotating shaft 14 protruding from the clamp body 1 is clamped. The ring housing cylinder portion 12 of the clamp body 1 is inserted and attached between the inner cylinder 21 and the outer cylinder 22 of the clamp cap 2 so as to protrude from the slit 24 of the clamp cap 2. 14, the bearing hook 31 of the clamp lever 3 is fitted and locked so as to wrap the outer cylinder 22 of the clamp cap 2 to obtain a catheter connector of this embodiment.

  Here, since the bearing hook 31 of the clamp lever 3 protrudes from both side surfaces of the gripping portion 33 and has a shape including notches between the bearing hooks 31, the gripping portion 33 is provided when the clamp lever 3 is rotated. The upper end portion comes into contact with the outer cylinder 22 of the clamp cap 2 and stops, and the contact position becomes the upper limit position in a state where the clamp lever 3 is opened.

  Further, in this embodiment, in order to prevent the catheter from coming off from the catheter holding plate 5 serving as a means for preventing the catheter from coming off, a seal tape 8 that covers at least a part of the folding groove 53 and is wound around the connector is attached. ing. The seal tape 8 is provided by being attached to a seal mount 81 with a sheet having an adhesive seal on the back surface, and the seal mount 81 is provided with a cut 82 that can be divided into two to facilitate peeling. The size may be determined depending on the size of the connector, but the length that can be wound around the circumference of the connector one or more times and the width suitable for covering the groove portion on the side surface side of the folded groove 53. It is preferable to set it as the size provided with.

Next, means for connecting the catheter to the catheter connector of this embodiment will be described.
First, with the clamp lever 3 opened, the distal end portion of the catheter 7 is inserted from the insertion hole 210 of the clamp cap 2 through the through hole 41 of the tightening ring 4 to the catheter end accommodating portion 17 of the clamp body 1.
Then, as described above, the clamp lever 3 connected to the rotation shaft 14 of the clamp body 1 is rotated about the rotation shaft 14 to change the clamp lever 3 from the open state to the closed state. The contact portion 26 pressed by the pressing portion 32 of the clamp lever 3 moves in the axial direction to push down the inner cylinder 21 of the clamp cap 2, and the tightening ring 4 is connected to the tightening ring retaining portion 16 of the clamp body 1. As a result, the catheter is clamped and connected to the clamp ring 4, and the principle is as follows.

As described above, the connection portion 26 of the clamp cap 2 pressed by the clamp lever 3 includes the first contact surface 26a and the second contact surface 26b, and a space 27 is formed between the two contact surfaces 26. .
Here, when the clamp lever 3 is rotated and moved to a position where the pressing portion 32 of the clamp lever 3 comes into contact with the first contact surface 26a, the clamp cap 2 is pushed down to compress the tightening ring 4 and The repulsion becomes resistance, and unless a certain amount of pressure is applied, the rebound is not turned, and it is necessary to press the finger and get over the contact surface 26a. When this is pressed and the pressing portion 32 exceeds the first contact surface 26a, the pressing portion 32 is positioned in the gap space 27. Therefore, even when the clamp lever 3 is returned, the first contact surface 26a is resistant. On the other hand, when moving forward, the second contact surface 26b becomes a resistance, and it is necessary to apply pressure again in order to overcome this, so that this position, that is, when turning with a finger naturally, that is, It temporarily stops at the temporary fixing position before it is completely closed. In this embodiment, the tightening ring 4 is sufficiently crushed in this state, and the connection of the catheter 7 is in a state where there is no problem in the short term. Can be enforced.

  In this temporarily fixed state, since the clamp lever 3 is not fixed by the locking means, it can be easily returned to the open state by rotating the clamp lever 3 in the direction to return the clamp lever 3 with fingers.

  When the pressing portion 32 further rotates in the direction of closing the clamp lever 3 from the temporary fixing position in the space 27 and the pressing portion 32 exceeds the second contact surface 26b, the pressing portion 32 is parallel to the contact surface 26b. In addition, the clamp lever 3 and the clamp cap 2 come into contact with each other, and a completely closed state (a state where the catheter is strongly connected) in which no further rotation is possible. Further, at this stage, the connection fixing means, that is, the locking by the locking hook 18 of the clamp body 1 and the latching portion 34 of the crank lever 3 is naturally locked, so that it opens unintentionally. Therefore, the connection with the catheter is prevented from being loosened or loosened.

After connecting the catheter to the catheter connector as described above, the proximal side of the catheter 7 is wound around the catheter holding plate 5 in order to reliably prevent the catheter 7 from coming off from the connector. FIG. 8 is a perspective view when A is a catheter attached to the holding plate, and B is a bottom view thereof.
The catheter 7 having a proximal end connected to the distal end portion of the catheter connector is inserted into the passage groove 55a on the forward path side from between the passage claws 54 that are folded back and opposed to each other, and the folding groove 53 of the folding claw 52 is inserted. Then, the loop was reversed and inserted again into the passage groove 55b on the return side from between the passage claws 54 to form a loop to prevent the catheter 7 from coming out of the connector connecting portion.

FIG. 9 is a bottom view showing a state where the seal tape 8 is wound around the connector.
After the catheter is wound around the catheter holding plate 5, the seal tape 8 is wound around the connector so as to cover almost the entire folding claw 52 (folding groove 53). In this way, the seal tape 8 is wound so as to cover the folded claw 52, thereby covering the gap that opens to the outside of the folded groove 53, the catheter is restricted from spreading outward, and is elastic. Even a large catheter does not come off the holding plate 5. Moreover, in the connector of this embodiment, since it is wound around the connector, the crank lever 3 corresponding to the opposite surface of the catheter holding plate 5 can be pressed and placed at the same time. Is prevented from opening. Further, because of adhesion by an adhesive seal, sticking and stripping are easy and cost does not increase.

  As described above, as described above, it is possible to reliably prevent the catheter 7 from coming out of the connector connecting portion, and the looped catheter 7 is subjected to a force to spread outward, and the passage claws 54a and 54b Since the interval is close to the outer diameter of the catheter 7 and the sealing tape 8 is wound, the catheter 7 is prevented from being detached from the passage groove 55 and the turn-back groove 53. It is a safe catheter connector that can withstand long-term use such as anesthesia.

1. 10. Clamp body Female luer taper 12. Tightening ring storage cylinder 120. Lumen 13. Tightening ring insertion opening 14. Rotating shaft 15. Main body base 16. Fastening ring fastening part 17. Catheter end container 170. Opening part 171. Catheter clamp 18. Locking hook Clamp cap 21. Inner cylinder 210. Insertion hole 22. Outer cylinder 23. Tip 24. Slit 25. Wings 26a. First contact portion 26b. Second contact portion 27. Space 3. Clamp lever 31. Bearing hook 32. Pressing part 33. Grip part 34. Latch part 4. Tightening ring 41. Through hole 5. Catheter holding plate 51. Base 52. Return claw 53. Folding groove 54. Passage claw 55. Passage groove 6. Cap 7. Catheter 8. sealing tape

Claims (3)

In the connector for detachably connecting the proximal end portion of the catheter, a passage through which the proximal side of the catheter is wound is provided on the side surface of the connector to prevent removal of the catheter. outward as the folded portion to form a folded groove which opens by a pair of passage grooves which open toward the inside of the round-trip path of the catheter into the folded portion, inwardly to form a passage groove A catheter connector comprising: a pair of passage claws that are opened to be opposed to each other with a gap formed to be equal to or slightly larger than the outer diameter of the catheter to be passed therethrough . 2. The catheter connector according to claim 1, wherein the disengagement prevention means is configured by providing a turn-back claw that opens outward to form the turn-back groove portion and the pair of opposing passage claws on the base surface. Around the circumferential direction of the connector, either the catheter connector of claim 1 or 2 comprising a removable sealing tape wound around at least a portion of the folded groove.

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