JP2019198510A - Catheter connector - Google Patents

Abstract

To provide a catheter connector enabling easily and surely removing a catheter from a connector in the connector detachably connecting the terminal part of the catheter with simple operation.SOLUTION: A catheter connector is constituted of: a tightening ring 4 comprising a rubber elastic member including a through hole to insert a catheter into; a connector body 1 including a cylinder part 12 for storing the tightening ring in the lumen; a connector cap 2 assembled with the connector body in a form of pinching the tightening ring together with the connector body; and slide means for sliding the connector cap to the connector body in an axial direction, pressing to the tightening ring, and releasing the pressing. A plurality of recessed strip grooves 19 parallel in the axial direction are provided on a distal side wall surface in the cylinder part lumen of the connector body, and on the other hand, recessed strip grooves are not provided on a proximal side wall surface. An outer peripheral surface at a distal side of the tightening ring is arranged on a wall surface provided with the recessed strip grooves, and an outer peripheral surface at a proximal side is arranged on a wall surface not provided with the recessed strip grooves.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a connection device for connecting a catheter to a drug solution injection device, and relates to a catheter connector that is detachably connected to a distal end portion of the catheter.

  For example, as a catheter connector for detachably connecting the epidural catheter to a distal end portion of the catheter in order to connect the epidural catheter to a syringe or the like, a rubber elastic clamping ring having a through hole for passing the catheter, and the clamping A cylindrical clamp body (connector body) with a ring inserted therein, a clamp cap (connector cap) attached to the clamp body in such a manner that the clamping ring is sandwiched between the clamp body, and the clamp cap relative to the axial direction of the clamp body It consists of a clamp lever that can be moved, a catheter is passed through the through hole of the tightening ring, and the clamp ring sandwiched between the clamp body and the clamp cap is crushed from both ends by operating the clamp lever to compress the through hole of the tightening ring. Proposal of a device for connecting and fixing catheters It has been. (Patent Document 1)

JP 2014-155625 A

  The conventional catheter connector is capable of sliding the clamp cap by rotating the clamp lever and connecting or releasing the catheter to or from the connector by one-touch operation. It is a user-friendly connector that does not cause defects.

  However, the connector used by crushing the rubber elastic tightening ring from both ends in this way, such as when removing the connected catheter or when reconnecting, loosens the clamp cap by operating the clamp lever and compresses the tightening ring. Even if released, due to the nature of the tightening ring with rubber elasticity, the outer peripheral surface of the ring is stuck to the inner wall of the clamp body and the catheter is easily pulled out because the shape of the tightening ring does not return to its original shape. There are reports of problems that cannot be made.

  Therefore, the present invention provides a catheter connector that can be easily and reliably removed when removing the catheter from the connector while making the connection with the catheter as easy as conventional one-touch connectors. It was an issue to provide.

  The catheter connector of the present invention is a mode in which a tightening ring made of a rubber elastic member having a through hole for passing a catheter, a connector main body having a cylindrical portion that accommodates the tightening ring in an inner cavity, and the tightening ring sandwiched with the connector main body. And a connector cap that is assembled to the connector main body, and a sliding means that slides the connector cap relative to the connector main body in the axial direction to press and release the clamping ring, and accommodates the clamping ring. A plurality of concave grooves that are arranged in parallel in the axial direction are formed on a part of the wall surface of the cylindrical lumen of the connector body.

  The plurality of concave grooves are provided on the distal side wall surface of the tube portion lumen of the connector body, and are not provided on the proximal side wall surface of the tube portion lumen. The distal side wall surface refers to the inner wall surface on the side where the catheter is inserted on the distal end side of the cylindrical portion of the connector main body, and the proximal side wall surface refers to the inner wall surface on the bottom side of the cylindrical portion of the connector main body.

  Further, the tightening ring has a lumen wall surface of the connector main body in which the outer peripheral surface on the distal side is not provided with the groove grooves, and the outer peripheral surface on the proximal side is not provided with the groove grooves. It is arranged in contact with.

(Function)
According to the catheter connector of the above means, since the plurality of concave grooves are arranged in parallel in the axial direction on the wall surface of the cylindrical portion lumen of the connector main body that accommodates the tightening ring, the concave ring grooves of the tightening ring and the lumen wall surface are provided. When the compression of the tightening ring is released due to a gap, the contact surface (contact surface) between the outer peripheral surface of the tightening ring and the inner wall surface of the connector body is reduced and the contact frictional resistance is reduced. Easy to return to the original shape. In addition, the proximal side wall surface of the cylindrical lumen is not provided with a concave groove, and the tightening ring contacts the wall surface with the groove on the distal side and the wall surface without the groove on the proximal side, thereby maintaining airtightness and contacting with a gap. By maintaining the resistance in a well-balanced manner, airtightness can be reliably maintained during compression to prevent liquid leakage and the like, and the tightening ring can be restored to its original shape in a short time when compression is released.

  According to the catheter connector of the above means, the catheter can be easily connected with the conventional one-touch connector, and the catheter can be easily and reliably removed when the catheter is removed from the connector. A possible catheter connector can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram of the catheter connector of embodiment of this invention. (Clamp lever opened) The side view of the state which opened the clamp lever of the said form, and the external view of the clamping ring accommodated in the inside. Side surface sectional drawing of the state which closed the clamp lever of the said form. The perspective view of the connector main body of the said form. The front view and side view of the connector main body of the said form. Sectional drawing of the AA of the said connector main body, and sectional drawing of the state which accommodated the clamping ring. BB sectional drawing of the said connector main body. The perspective view and front view of the connector cap of the said form. The perspective view and side view of the clamp lever of the said form. The perspective view which shows an example of the conventional connector main body.

Hereinafter, an embodiment 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 catheter connector according to the present embodiment in a state in which a clamp lever is opened. FIG. 2 shows a side view of the state A and a tightening ring B accommodated in the connector. ing. FIG. 3 is a side cross-sectional view showing a state in which the clamp lever of the above form is closed and the catheter is fixed. In addition, in order to make an understanding easy in sectional drawing of FIG. 3, the catheter is shown with the broken line as reference.

  The catheter connector of the present embodiment is used as a connector for connecting a distal end portion of a catheter such as an epidural anesthesia catheter and coupling an instrument (syringe, continuous injector, etc.) for injecting an anesthetic into the catheter. A tightening ring 4 made of a rubber elastic member having a through hole 41 through which the catheter passes, a cylindrical portion 12 that accommodates the tightening ring 4 in the lumen 120, and a connecting portion (tapered portion) with a drug solution injector. ) A connector body 1 having 11, a connector cap 2 that is assembled to the connector body 1 in such a manner that the clamping ring 4 is sandwiched from both ends together with the connector body 1, and the connector cap 2 is axially relative to the connector body 1. By the clamp lever 3 which is a slide operation unit for pressing and releasing the clamping ring 4 It constructed basically.

  Next, each part will be described in detail. 4 to 7 show the connector body of this embodiment, FIG. 4 is a perspective view, FIG. 5 is a front view, B is a side view, and FIG. 6 is a cross-sectional view taken along the line AA. Fig. 7 shows a cross-sectional view when B holds the tightening ring in the lumen, and Fig. 7 shows a B-B cross-sectional view.

  In the connector main body 1 of the present embodiment, the proximal side is formed as a female luer taper portion 11 for connecting a male taper of a chemical injection device such as a syringe, and the distal side is tightened to accommodate the tightening ring 4. It has a lumen 120 that matches the outer diameter of the ring 4 and is formed as a cylindrical ring housing cylinder 12 having a distal end opening as an insertion port 13, and the tip side of the ring housing cylinder 12 is symmetrical. At the position, a clamp lever 3 which will be described later is attached, and a rotating shaft 14 for rotating is provided so as to protrude in the width direction.

  An intermediate portion between the luer taper portion 11 and the ring accommodating cylinder portion 12 is a connector main body base 15, and the bottom portion of the tightening ring 4 is connected to the inner cavity 120 communicating with the ring accommodating cylinder portion 12. A clamping ring fastening portion 16 having a step for retaining, a tapered catheter end receiving portion 17 for retaining a catheter end protruding through the through hole 41 of the clamping ring 4, and an end thereof A catheter fastening portion 171 is provided.

  Further, on the proximal side of the connector main body base portion 15, when the clamp lever 3 is completely closed to fix the catheter, a locking hook 18 serving as a means for fixing the clamp lever 3 is provided. The connector body 1 is formed integrally.

  Further, the catheter connector main 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. In addition, the periphery of the accommodating portion is formed as an opening missing portion 170 so that the catheter end accommodating portion 17 can be easily seen.

  A plurality of groove grooves 19 arranged in parallel in the axial direction are provided on the wall surface of the inner cavity 120 of the ring storage cylinder portion 12 at substantially equal intervals around the entire wall surface. When the fastening ring 4 is housed from the distal end of the wall surface, it is provided to a position about half the length of the fastening ring 4 to form a groove-set inner wall surface 12a. Is not provided with a groove groove, and is formed as a groove groove non-set inner wall surface 12b. Even when the tightening ring 4 is pressed and compressed by the connector cap 2, the fixed length portion on the distal side of the tightening ring 4 is set so as to be positioned on the concave groove setting inner wall surface 12a. . (See Figure 3)

FIG. 10 shows an example of a conventional connector body for reference.
Since the inner groove 5120 of the ring housing tube portion 512 of the conventional connector main body 51 is not provided with a groove groove, it is compressed and closely adhered to the wall surface of the inner cavity 5120 due to the nature of the tightening ring 4 made of a rubber elastic member. Later, even if the compression is released, the rubber elastic ring sticks to the wall surface of the lumen 5120, so that it may be difficult to return to the original shape before compression and the catheter may not come out.

  On the other hand, a concave groove 19 is provided in the inner cavity 120 of the ring housing cylinder portion 12 of the connector main body 1 of the present embodiment, and even when the tightening ring 4 is compressed, a fixed portion on the distal side of the tightening ring 4 remains. By setting the concave groove setting inner wall surface 12a, the contact friction resistance with the tightening ring 4 is reduced, for example, the contact area with the wall surface is reduced and the air passage is used to release the close contact with the wall surface. The fastening ring 4 is easy to return to the original shape before compression. Further, the proximal side of the tightening ring 4 is positioned on the inner surface 12b of the groove not set groove, thereby preventing liquid leakage from the groove.

  The tightening ring 4 is a cylindrical ring made of a rubber elastic resin that is used by being housed in the inner cavity 120 of the ring housing cylinder portion 12 of the connector body 1, and has a through hole 41 that can penetrate the catheter, and has an outer diameter. Is formed so as to be adapted to the inner diameter of the ring housing cylinder portion 12. After insertion of the catheter, the inner diameter of the through hole 41 is reduced by being crushed from both ends by the connector body 1 and the connector cap 2, and the catheter is fixed by tightening and fixing.

FIG. 8 shows the connector cap of this embodiment, A is a perspective view, and B is a side view.
The connector cap 2 is combined with the connector main body 1 in such a manner that the tightening ring 4 is sandwiched from both sides together with the connector main body 1. The connector cap 2 is inserted into the inner cavity 120 of the ring accommodating cylinder portion 12 of the connector main body 1 and is tightened. An inner cylinder 21 serving as a compression portion to the outer cylinder 22 and an outer cylinder 22 that accommodates the ring accommodating cylinder portion 12 of the connector main body 1 are provided in an outer extension that is coaxial with the inner cylinder 21, and the inner cylinder 21 and the outer cylinder 22 are They are connected and integrated so as to be folded at the front end portion 23. The inner cylinder 21 is provided with an insertion hole 210 into which a catheter can be inserted, and the outer cylinder 22 is connected to the connector main body 1 at a symmetrical position on the side of the outer cylinder 22 when the connector main body 1 is combined. 1 is provided with a slit 24 for projecting the rotating shaft 14 and restricting the movement of the connector body 1 and the connector cap 2 in the axial direction.

  Further, on the proximal side of the outer cylinder 22, there is provided a wing 25 extending over and extending on both sides in the width direction across the slit 24, and the wing 25 is rotated by the clamp lever 3 to be described later. As a contact portion 26 for moving the entire connector ring 2 in the axial direction, the surface on the clamp lever 3 side is sandwiched between the slits 24 on the upper surface of the blade 25 and the first side. The contact surface 26a and the back surface are formed as a second contact surface 26b, and a space 27 communicating with the slit 24 is formed between the first and second contact surfaces 26a and 26b, so that the connector cap 2 is movable. The fastening means of the tightening ring 4 and the temporary fastening means for temporarily stopping the rotation of the clamp lever 3 in the middle. In addition, a plate 28 for facilitating gripping and operation was provided on the surface facing the side where the clamp lever 3 to be described later is attached, and the connector cap 2 was formed by integrally forming these plates 28.

FIG. 9 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 rotating shaft 14 of the connector main body 1 and connected so as to be capable of rotating with the connector cap 2 interposed therebetween, and a contact portion 26 of the connector cap 2. A pressing portion 32 having a corner portion formed in an appropriate curved shape, which moves the connector 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 connector main body. The grip part 33 which is an operation part for rotating the lever from the open state where it is separated from 1 to the closed state where the lever is in contact with the connector main body 1, 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 connector main body 1 and integrally forming them.

The connector main body 1, the connector cap 2, the clamp lever 3, and the tightening ring 4 are connected and integrated as follows.
After inserting the tightening ring 4 into the ring housing cylinder portion 12 of the connector main body 1, the rotating shaft 14 protruding from the connector main body 1 is connected to the connector cap so as to sandwich the tightening ring 4 with the inner cylinder 21 of the connector cap 2. The ring housing cylinder portion 12 of the connector main body 1 is inserted and attached between the inner cylinder 21 and the outer cylinder 22 of the connector cap 2 so as to protrude from the slit 24 of the connector 2. Next, the bearing hook 31 of the clamp lever 3 was fitted to the rotating shaft 14 of the connector main body 1 so as to sandwich the outer cylinder 22 of the connector cap 2 to obtain the catheter connector of this embodiment. (Refer to FIGS. 1 to 3)

  Here, since the bearing hook 31 of the clamp lever 3 is projected from both side surfaces of the gripping portion 33 and the cutout portion is provided 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 connector 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 connector cap 2 through the through hole 41 of the tightening ring 4 to the catheter end accommodating portion 17 of the connector body 1 with the clamp lever 3 opened.
Then, as described above, the clamp lever 3 connected to the rotation shaft 14 of the connector 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 connector cap 2, and the tightening ring 4 is connected to the tightening ring retaining portion 16 of the connector body 1. As a result, the catheter is clamped and fixed to the clamp ring 4. When releasing the catheter connection, the clamp lever 3 is moved from the closed state to the opened state, so that the entire connector cap 2 slides to the distal side, and as a result, the pressure on the tightening ring 4 is released. The connection is released by expanding the through hole 41.

  When the clamp lever 3 is closed and the tightening ring 4 is crushed and the catheter is fixed, the crushed tightening ring 4 has a concave portion provided on the inner wall surface of the connector body 1. It is set so as to be in the position related to the groove 19. (See Figure 3)

  In this way, when the catheter is fastened and fixed, the distal side of the tightening ring 4 is set to the concave groove setting inner wall surface 12a of the ring accommodating cylinder portion 12, so that when the connection is released, This prevents the tightening ring 4 from sticking, preventing the shape from returning and the connection with the catheter from being released.

1. Connector body 11. (Female) Luer taper part 12． Ring storage cylinder 120. (Ring accommodation) lumen 12a. Concave groove setting inner wall surface 12b. Inner wall surface with no groove set 13. Ring insertion opening 14. Rotating shaft 15. Connector body base 16. Fastening ring fastening part 17. Catheter end container 171. Catheter clamp 18. Locking hook 19. Groove groove 2. Connector 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. 2. Grip plate Clamp lever 31. Bearing hook 32. Pressing part 33. Grip part 34. Latch part 4. Tightening ring 41. Through hole

Claims (3)

A tightening ring made of a rubber elastic member having a through hole for passing a catheter;
A connector body comprising a cylindrical portion for accommodating the tightening ring in the lumen;
A connector cap that is assembled to the connector body in such a manner as to sandwich the clamping ring together with the connector body;
The connector cap is slid relative to the connector main body in the axial direction, configured to include a slide unit that presses and releases the clamping ring,
A catheter connector comprising a plurality of concave grooves arranged in parallel in the axial direction on a partial wall surface of a tubular portion lumen of the connector main body.   2. The catheter connector according to claim 1, wherein the plurality of concave grooves are provided on a distal side wall surface of a tube portion lumen of the connector main body and are not provided on a proximal side wall surface of the tube portion lumen.   The fastening ring has a distal outer peripheral surface in contact with a lumen wall surface of the connector body provided with the plurality of concave grooves, and a proximal outer peripheral surface in contact with a lumen wall surface of the connector body without the concave grooves. The catheter connector according to claim 1, wherein the catheter connector is disposed as described above.

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