JP6059034B2 - 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, in order to connect an epidural catheter to a syringe or the like, as a connector that is detachably connected to the proximal end portion of the catheter, a tightening ring having rubber elasticity is provided between the connector body and the connector cap, and the tightening 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. What is fixed and connected is common. (For example, Patent Document 1)

  In addition, as a connector for facilitating the attachment / detachment with the catheter, it has a component configuration substantially the same as the connector, but is a clamping ring sandwiched between a connector main body (clamp main body) and a connector cap (clamp lid). As a tightening means for crushing (clamp bush), a clamp lever is used instead of a screw, and a grooved guide provided on the clamp lever is provided on the clamp body with the connection part between the clamp lid and the clamp lever as a fulcrum. There has been proposed a catheter clamp adapter in which the clamp body is moved in the axial direction by compressing the clamp bushing by engaging with the protrusion and rotating. (Patent Document 2)

JP 54-21087 A Special table 2010-530772

  An instrument such as Patent Document 2 can connect the connector to the catheter with one touch by opening and closing (turning) the clamp lever, and the tightening strength to the tightening ring is constant, so that it is tightened with a screw. The connector is easy to use because it does not cause poor tightening due to the amount of tightening.

However, such a connector can be removed with a single touch, and when used for a long period of time, such as an epidural catheter, the connector may be accidentally disconnected or loosened during use. Therefore, some of the conventional one-touch connectors include measures that strengthen the fitting in the locked state or provide a lock structure as a safety mechanism.
Such a connector prevents the catheter from being easily disconnected or loosened, but once it is completely connected, it cannot be easily disconnected with one touch when reconnecting, etc. Removal may be a little cumbersome compared to the connection.

  Accordingly, the present invention has an object to provide a catheter connector that can be connected to a catheter by a stepwise operation that is not inferior to a one-touch connector and is not completely connected at a time. .

  The catheter connector of the present invention includes a cylindrical clamp body in which a rubber-elastic clamping ring is disposed in an inner lumen, a clamp cap attached to the clamp body in a mode of sandwiching the clamping ring together with the clamp body, and a side surface of the clamp body The clamp cap is configured by a clamp lever that is movable in the axial direction of the clamp body by rotating the rotation shaft, and the clamp lever is opened from the open state to the closed state. When the catheter is connected by compressing the tightening ring, locking means that can be temporarily fixed in the middle of the rotation is provided.

  The clamp cap can be moved by the clamp lever when the pressing portion provided on the clamp lever presses the contact portion provided on the clamp cap, so that the rotating movement of the clamp lever changes to the reciprocating motion of the clamp body in the axial direction by the clamp cap. And converted.

  And the contact part provided in the said clamp cap is equipped with the 1st contact surface and the 2nd contact surface, and has the space used as a clearance gap between this 1st and 2nd contact surface. Thus, the first and second contact surfaces and the space function as locking means for temporarily stopping the rotation of the clamp lever.

  Further, the clamp body, the clamp cap, and / or the clamp lever are provided with connection fixing means adapted to each other when the clamp lever is completely closed.

  Furthermore, the side surface of the clamp cap is provided with a slit that engages with the rotation shaft of the clamp body.

(Function)
The catheter connector of the above means is closed by passing the proximal end of the catheter through the hole of the tightening ring with the clamp lever open (the tightening ring is not tightened), and rotating the clamp lever toward the clamp body. In this state, the clamp cap is pressed, the clamping ring is crushed between the clamp body and the clamp cap, the inner diameter is reduced, and the catheter is fixed, but the clamp lever is closed from the open state In the middle of compressing the tightening ring in the middle, it is in the previous stage (temporary fixing stage) where it is completely closed and cannot be easily removed by providing a locking means that can be temporarily fixed. Can perform connection tests, chemical injection tests, etc., and if a problem occurs at this stage, the catheter can be easily removed. Can.

  By making the contact part provided in the clamp cap into the first contact surface and the second contact surface provided with a gap space, there are two resistance parts to the pressing part when rotating the clamp lever. Since a large pressing force is required to get over the contact surface, when the pressing portion gets over the first contact surface and is in a gap space with the second contact surface, the movable state is temporarily stopped.

With the clamp body, clamp cap, and / or connection fixing means that fits the clamp lever, the epidural anesthesia can be secured at the same time as the second-stage lock that is completely closed. There is no opening of the lever due to an unintentional operation or the like, which is not intended for long-term indwelling, and the catheter is not loosened.
Further, when the clamp cap is provided with a slit that engages with a rotation shaft provided on the clamp body, the clamp lever can be attached and the above-described operation can be performed, and the clamp cap can be slid within the range of the slit.

  According to the catheter connector of the above means, the connector and the catheter can be easily and surely attached and detached only by rotating (opening and closing) the clamp lever. In addition, the locking lever can be moved temporarily (clamping of the catheter by the clamping ring), and a locking means that can be temporarily stopped is provided. By connecting in two stages, it is temporarily fixed in the first stage and completely locked in the second stage. For example, it is possible to perform a chemical injection test at the temporary fixing stage, and if there is any inconvenience, it can be easily returned to the original open state, and the connector should be easy to use. it can.

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 the block diagram of a clamping ring. 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 perspective view and front view of the clamp cap of the said form. The perspective view and side view of the clamp lever of 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 shows an overall configuration diagram of the present embodiment, FIG. 2 shows a side view in a state where A is a clamp lever of the above-described form, and B shows a tightening ring attached in the connector. FIG. 3 is a side sectional view showing a state in which 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; A clamp body 1 comprising a stapler 11 for connection to an injection device, and a main body base 15 provided in the middle of the ring accommodating cylinder portion 12 and the stapler portion 11.
A tightening ring 4 having rubber elasticity to be accommodated inside the lumen 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 detailed description will be given to each of the above parts. FIG. 4 shows the clamp body of this embodiment, A is a perspective view, and B is a side view.
The clamp body 1 is formed as a female luer taper 11 for connecting a syringe or the like on the rear end side, and a cylindrical shape having a lumen that matches the outer diameter of the tightening ring 4 on the front end side and having the insertion port 13 at the front end. Formed as a ring housing cylinder portion 12, a pivot shaft 14 for pivoting the clamp lever 3 is provided in a projecting manner in the width direction at a symmetrical position on the side surface on the front end side of the ring housing cylinder portion 12. did. An intermediate portion between the luer taper 11 and the ring housing cylinder portion 12 is a clamp body base portion 15, and the clamp body base portion 15 holds the bottom portion of the tightening ring 4 in a lumen communicating with the ring housing tube portion 12. The fastening ring fastening portion 16 having the above-mentioned steps, the catheter end receiving portion 17 formed in a tapered shape for retaining the catheter end protruding through the through-hole 41 of the fastening ring 4, and the catheter serving as the end thereof When the clamp lever 171 is provided, and when the clamp lever 3 to which the catheter is connected is completely closed, the engagement protrusion 19 serving as a connection fixing means with the clamp cab 2 and the clamp lever 3 are provided. The clamp body 1 is configured by providing a locking hook 18 serving as a connection fixing means and integrally forming these hooks.
The clamp body 1 is formed of a transparent or translucent resin so that it can be visually confirmed from the outside that the catheter end is inserted to the position of the catheter fastening portion 171 of the predetermined catheter end accommodating portion 17. Further, the opening portion 170 is formed around the housing portion so that the catheter end housing portion 17 can be easily seen.

  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. 5 shows a clamp cap of the present embodiment, in which A is a perspective view and B is a front view.
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.
Further, when the clamp lever 3 is completely closed, a locking hole 29 serving as a connection fixing means adapted to the engaging projection 19 of the clamp body 1 is provided, and these are integrally formed to clamp A cap 2 was constructed.

FIG. 6 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, which moves the clamp cap 2 so as to be pushed in the axial direction when the catheter is connected, and the clamp lever 3 is connected to the clamp body. When the gripping portion 33 that is an operation portion for rotating the lever from the open state that is separated from 1 to the closed state that is in contact with the clamp body, and the completely closed state is provided. 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, 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 two slits 24.
And the bearing hook 31 of the clamp lever 3 was latched so that the outer cylinder 22 of the clamp cap 2 might be pinched | interposed to the rotating shaft 14 of the said clamp main body 1, and it was set as the catheter connector of this form.

  Here, since the bearing hook 31 of the clamp lever 3 protrudes from both side surfaces of the grip portion 33 and has a notch portion between the bearing hooks 31, the grip 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.

Means for connecting the catheter to the catheter connector of this embodiment will be described.
First, the distal end portion of the catheter 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 with the clamp lever 3 opened.
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 catheter is connected without any problem, so that the injection of the drug solution can be performed without any problem.

  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 connected) in which no further rotation is possible. At this stage, the above-described two connection fixing means, that is, locking by the locking projection 19 of the clamp body 1 and the locking hole of the clamp cap 2, and the locking hook 18 of the clamp body 1 and the crank lever 3 is locked naturally by the latching portion 34, the unintentionally closed state is opened and the connection with the catheter is prevented from being disconnected or loosened.

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 171. Catheter clamp 18. Locking hook 19. 1. Engagement protrusion 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 28. Locking plate 29. 2. Locking hole Clamp lever 31. Bearing hook 32. Pressing part 33. Grip part 34. Latch part 4. Tightening ring 41. Through hole

Claims (5)

A clamp body in which a rubber elastic tightening ring is arranged in the inner lumen;
A clamp cap attached to the clamp body in a manner to sandwich the clamping ring with the clamp body;
Mounted on pivot shaft provided on the clamp body, by rotating the pivot shaft as an axis, constituted by a clamp lever that moves the clamp cap in the axial direction of the clamp body,
When the clamp lever is rotated from the open state to the closed state, and the catheter is connected by compressing the clamping ring, a locking means is provided which can be temporarily fixed in the middle of the rotation. Catheter connector.   The catheter connector according to claim 1, wherein the movement of the clamp cap by the clamp lever is activated by a pressing portion provided on the clamp lever pressing a contact portion provided on the clamp cap.   The contact portion provided on the clamp cap includes a first contact surface and a second contact surface, and has a space between the first and second contact surfaces. The catheter connector according to claim 2, wherein the contact surface and the space serve as a locking means for temporarily stopping the rotation of the clamp lever.   The catheter connector according to any one of claims 1 to 3, wherein the clamp body, the clamp cap, and / or the clamp lever are provided with connection fixing means adapted to each other when the clamp lever is completely closed.   The catheter connector according to claim 1, wherein the clamp cap includes a slit that engages with a rotation shaft of the clamp body.

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