JP3123147U - Branch pipe with clamp and medical device - Google Patents

Abstract

To provide a branch pipe with a clamp which can be reliably closed whenever necessary because the clamp is always in a fixed position and is easy to assemble.
At least a branching means (7a, 7b) for the branch tube (T2), an insertion hole (10) for the branch tube (T2), and a movable means (4, 6) for the clamping means (7a, 7b); A clamp (C) having a mounting portion (KC) and formed by the movable means (4, 6) so that the clamping means (7a, 7b) can close the branch tube (T2), and a main tube (T1) ) And a branch pipe (B) having a second pipe (16) connecting the branch tube (T2), and attached to the second pipe (16) of the branch pipe (B) A branch pipe (1) with a clamp in which a mounting part (KB) is formed and a mounting part (KC) of the clamp (C) is mounted on the mounting part (KB).
[Selection] Figure 1

Description

  The present invention relates to a branch tube with a clamp used for a medical device (for example, a blood circuit for dialysis, a drug solution injection device, etc.) in which a drug solution injection tube, a priming tube, etc. are connected to a branch portion (approximately T-shaped tube, approximately Y-shaped tube). It is about improvement. Specifically, the operability is improved by integrally forming the clamp on the branch pipe (substantially T-shaped pipe, substantially Y-shaped pipe).

The blood circuit used for artificial dialysis is connected to several branch tubes such as a priming tube generally connected to a physiological saline solution container for priming and the like, and a heparin tube for heparin injection, The branch tube is mainly connected to a branch tube such as a substantially T-shaped tube or a substantially Y-shaped tube.
For example, priming is an operation to clean and remove minute dust, membrane protective agent, filling liquid and air in the dialyzer / blood circuit so that treatment can be started.
During this priming, physiological saline is introduced from the priming tube. When the priming is completed, the priming tube is closed with a closing means (clamp or forceps), and the flow path is once blocked. When returning blood remaining in the circuit to the patient after completion of dialysis, it is necessary to use a closing means that can be opened and closed in order to reopen the blocked priming tube.
Heparin (an anticoagulant) is a drug that does not solidify blood and is slowly administered into the blood from the beginning to the end of dialysis treatment using a heparin tube.

The above-mentioned heparin tube is manufactured thinly with a soft material for convenience and requires a certain length (around 1 m), so that the tube is easily bent or bent. For this reason, for example, when closing with a clamp before or at the end of dialysis treatment, there is a problem that the tube escapes from the clamp and cannot be completely closed.
Furthermore, since there is a slight distance between the branch pipe and the clamp, there is a concern that blood may stay in the tube between the branch pipe and the clamp when the tube is closed, and clots may occur.
Also, because the clamp is usually mounted in a movable state so that it can move on the tube, it moves between long tubes during dialysis work, and the clamp is lost when obstruction is necessary and immediately There is a possibility that it cannot respond to.

  As described above, the distance from the branch pipe to the clamp is preferably as short as possible, and it is preferable that the clamp does not move unnecessarily from the viewpoint of work operability. Further, if the clamp is located closer to the branch pipe, the tube is difficult to bend, so that the tube can be reliably closed. Furthermore, if the clamp stays in place, it can be operated with one hand.

In Patent Document 1, the tube 19 (main tube) can be opened and closed by clamping with a flexible first arm 25 and second arm 27 formed integrally with plastic, and connected to another member (syringe or the like). A tube closing clip 15 having a hub 33 is described.
Patent Document 2 discloses a clamp composed of a connector portion 2 having a connector 2a that can be screwed at one end and a cylindrical tube connector 2c at another end, and a roller that holds and presses a (main) tube. The connector clamp 1 has a portion 3 and one end of the clamp portion 3 is integrally joined to the outer periphery of the middle portion of the connector portion 2 so that liquid can be quickly injected and discharged with a more compact and simple operation. Are listed.
Patent Document 3 describes a connector 10 with a cap 32 in which a tapered socket 16 and a clamp 18 are integrally formed.
Further, Patent Document 4 discloses that a chemical solution injection tube 9 is provided with an elasticity that allows the tube collapse to be restored after the forceps are removed, and the forceps mounting position range of the forceps mounting portion 6 can be easily understood. 9 shows a T-tube of a blood conduit in which ring-shaped protrusions 10 and 11 are integrally formed at two locations on the outer peripheral surface of 9.

  In the invention of Patent Document 1, since the tube 33 can be closed and opened with one hand, and the hub 33 and the clip 15 that can be connected to the syringe 13 are integrally formed, the clip 15 does not slide along the tube 19, and the clip The hub 33 has only one opening, and the branch tube cannot be connected and cannot be clamped.

The invention of Patent Document 2 is more compact than the case where the clamp and the connector are integrally joined, and the connector and the clamp are close to each other, so that the clamp can be quickly opened and closed. Can be clamped with one hand.
However, since the invention described in Patent Document 2 clamps and presses the tube with a roller, the number of parts is large, the configuration is complicated, and the cost is high.
The inventions of Patent Document 2 and Patent Document 3 only hold the main tube, and the branch tube cannot be connected and cannot be held.
The device disclosed in Patent Document 4 is a T-shaped tube, and the forceps mounting portion 6 between the ring-shaped protrusions 10 and 11 of the drug solution injection tube 9 is sandwiched by the forceps 15 to close the tube, but the tube can be closed with one hand. Compared with the operability of the clamp, it requires a certain level of proficiency in the handling of forceps and forceps during occlusion.
JP 61-160674 A (Fig. 4) JP-A-8-266623 (FIG. 2) JP-T-2001-527441 (FIGS. 1 and 4) Japanese Utility Model Publication No. 62-23489 (claim for utility model registration, Fig. 2)

The problem to be solved by the present invention is that in the conventional branch pipe, the clamp is mounted on the branch tube so that the clamp can be moved. However, the clamp is missing and cannot be dealt with immediately.
In addition, a thin soft tube such as a “heparin tube” is difficult to protrude from the clamp and to be blocked.
In the inventions of Patent Documents 1 to 3, a branch tube other than the main tube (particularly, a thin and soft tube such as a heparin tube) cannot be connected and cannot be blocked. Although the idea of Patent Document 4 is also a T-shaped tube, it is difficult to say that it is easy to use because forceps must be used during occlusion.
In view of the above problems, the present invention provides a clamp-equipped branch pipe that can be reliably closed even with a thin and soft tube.

[1] The present invention provides at least a holding means (7a, 7b) for the branch tube (T2), an insertion hole (10) for the branch tube (T2), and a movable means (4, 6) for the holding means (7a, 7b). ) And a mounting part (KC),
A clamp (C) formed by the movable means (4, 6) so that the clamping means (7a, 7b) can close the branch tube (T2);
A branch pipe (B) having a first pipe (15) connecting the main tube (T1) and a second pipe (16) connecting the branch tube (T2);
A branch pipe (1) having a mounting part (KB) formed on the second pipe (16) of the branch pipe (B) and the mounting part (KC) of the clamp (C) mounted on the mounting part (KB). )I will provide a.
[2] In the present invention, the clamp (C) serves as a clamping means (7a, 7b) of the branch tube (T2), and is sandwiched at the lower part of the sealing member (3) (7a) and the upper part of the bottom part (2). Forming a clamping part (7b)
The bottom part (2) and the sealing member (3) are integrally formed via a connecting part (8) that is connected to each other.
As the movable means (4, 6) of the clamping means (7a, 7b), an engaging protrusion (4) is formed at the tip of the sealing member (3), and the connecting part (14) rising from the bottom (2) A locking portion (6) that engages with the engaging protrusion (4) is formed on the upper portion of
A branch pipe (1) with a clamp according to [1], which is a clamp (C) in which an insertion hole (10b) of a branch tube (T2) is formed in the connecting portion (14).
[3] In the present invention, the mounting portion (KB) of the branch pipe (B) is composed of two ribs (22a, 22b) and a groove (21) formed between the two ribs (22a, 22b). Yes,
The clamp according to [1] or [2], wherein the mounting part (KC) of the clamp (C) is a part of the insertion hole (10a) and / or the connection part (8) around the insertion hole (10a). A branch pipe (1) is provided.
[4] The present invention provides a medical device including the branch pipe (1) with a clamp according to any one of [1] to [3].
In the present invention, “attachment” is a broad concept (meaning) including the meanings of “engagement” and “insertion”.

The branch pipe with a clamp according to the present invention has the following effects.
(1) Since the mounting portion KB of the second pipe 16 that connects the branch tube T2 of the branching portion B and the mounting portion KC of the clamp C are mounted, the clamp C is always in a fixed position. For this reason, the branch tube T2 can be reliably closed whenever necessary.
(2) Even if the branch tube T2 is a thin and soft tube such as a “heparin tube”, it can be reliably closed without protruding from the clamp C.
(3) As in (1), since the branch tube T2 can be closed at the closest position of the branch portion B, residual blood in the branch tube T2 can be minimized, blood is not wasted, and residual blood The risk of blood clots and the like is also reduced by having less.
(4) Since only the clamp is attached to the branch pipe, the assembly is easier than the inventions of the integrated patent document 1 and patent document 3.

[Branch pipe with clamp 1]
FIG. 1 is a schematic view of a branch pipe 1 with a clamp according to the present invention. FIG. 2 is a schematic view of a branch portion B before engaging a clamp C of the branch pipe 1 with a clamp according to the present invention. FIG. 4 is a schematic view showing another example of the branch pipe B, and FIG. 4 is a cross-sectional view when the branch tube T2 of the clamped branch pipe 1 of the present invention is closed.
As shown in FIGS. 1 and 4, the branch pipe 1 with a clamp according to the present invention has a mounting portion KC of a clamp C attached to a mounting portion KB of the branch pipe B.

[Clamp C]
The clamp C includes at least the clamping means 7a and 7b of the branch tube T2, the insertion hole 10 of the branch tube T2, and the movable means 4 and 6 of the clamping means 7a and 7b.
The movable means 4 and 6 are formed so that the clamping means 7a and 7b can close the branch tube T2.
For example, as illustrated in FIGS. 1 and 4, the clamp C is formed by forming a sandwiching portion 7 a at the lower portion of the sealing member 3 and a sandwiching portion 7 b at the upper portion of the bottom portion 2 as the sandwiching means 7 a and 7 b of the branch tube T <b> 2. Yes.
The bottom portion 2 and the sealing member 3 are integrally formed through a connection portion 8 that is connected to each other.
As the movable means 4, 6 of the clamping means 7 a, 7 b, an engaging protrusion 4 is formed at the tip of the sealing member 3, and the engaging protrusion 4 is engaged with the upper part of the connecting part 14 rising from the bottom 2. A mating locking portion 6 is formed.
A mounting portion KC to be mounted on the mounting portion KB of the second pipe 16 of the branch pipe B is formed in the connection portion 8, and an insertion hole 10 b of the branch tube T <b> 2 is formed in the connecting portion 14. The engagement part KC indicates a part of the insertion hole 10a and / or the connection part 8 around the insertion hole 10a.
When the engaging protrusion 4 and the locking portion 6 are engaged, the branch tube T2 can be closed by pressing and holding the branch tube T2 by the holding portion 7a and the holding portion 7b.
The clamp C is not limited to the form of FIG.1 and FIG.4. At least the holding means 7a, 7b of the branch tube T2, the insertion hole 10a that can be mounted in the groove 21 of the second tube 16, the insertion hole 10b of the branch tube T2, and the movable means 4, 6 of the holding means 7a, 7b. Anything is fine.
The sandwiching means 7a, 7b may have any form as long as it is a projection and can reliably block the liquid flow path of the branch tube T2.
The movable means 4 and 6 of the clamping means 7a and 7b are not limited to the form of the engaging protrusion 4 and the locking part 6 shown in FIGS. Any means may be used as long as one or both of the holding means 7a and 7b can be moved up and down or left and right to close or open the liquid flow path of the branch tube T2.
1 and 4, the connecting portion 8 is formed in a rectangular shape, but is not limited to the illustrated shape, and may be, for example, a gently curved shape or an arc shape (both not shown). As long as the action of the clamp C is not impaired and the attachment part KC that can be attached to the attachment part KB of the second pipe 16 of the branch pipe B can be formed, the shape may be anything.

[Branch pipe B]
The branch pipe B includes a first pipe 15 that connects the main tube T1 and a second pipe 16 that connects the branch tube T2.
For example, as shown in FIG. 1 to FIG. 4, it may be substantially T-shaped (the second tube 16 is disposed at approximately 90 ° with respect to the first tube 15). It may be substantially Y-shaped [(the second tube 16 may be less than approximately 90 ° (for example, 45 °) or greater than 90 ° (for example, 120 °) with respect to the first tube 15]].
As shown in FIG. 2, the mounting portion KB is configured by the rib 22a, the rib 22b, and the groove 21 formed between the two ribs 22a, 22b in the second pipe 16. The mounting portion KC of the clamp C is mounted in the groove 21.
The shape of the rib 22a is not limited to the ring shape shown in FIG. 2, but for example, as shown in FIG. 3, it is formed into a taper shape having a large diameter from the branch tube T2 to the groove 21 side, so that the clamp C is smoother. Can be worn.
The branch pipe B is formed of a soft or semi-rigid material such as PVC (soft vinyl chloride) or elastomer. Due to the flexibility of the branch pipe B, the mounting portion KC of the clamp C (a part of the insertion hole 10a and / or the connection portion 8 around the insertion hole 10a) gets over the rib 22a, and at the position of the groove 21. Engaged. The clamp C does not easily come off in the direction of the branch tube T2 due to the rib 22a that has passed over, and the rib 22b serves as a stopper, so that the clamp C does not easily move in the direction of the branch portion.

[Reciprocal relationship between clamp C, branch tube B, and branch tube T2]
An engaging portion KC of the clamp C is mounted on the mounting portion KB of the second tube 16 of the branch tube B, and a branch tube T2 is connected to the tip of the second tube 16 of the branch tube B.
Since the sealing member 2 (clamping part 7a) of the clamp C of the branch tube T2 and the part surrounded by the bottom part 3 (clamping part 7b) and the connection part 8 do not protrude from the clamp C, the clamping part is surely secured. 7a and the clamping part 7b can close.
Normally, however, the tube T2 is thin and soft like a heparin tube, and when the tube is closed with a clamp, the tube T2 is bent and protrudes from the side of the clamp C. Since the tube can be closed at a position closer to the connection portion with the more rigid branch pipe B, the tube is difficult to bend, and therefore the possibility of such a problem is extremely low.
As described above, since the branch pipe 1 with a clamp according to the present invention has the clamp C attached to the branch pipe B, the branch tube T2 can reliably close the position closest to the connection portion of the second pipe 16.
The material of the clamp C of the branch pipe 1 with a clamp of the present invention is ABS (acrylonitrile-butadiene-styrene copolymer), polycarbonate, polypropylene, polyacetal, or other synthetic resin, which can be easily molded and has rebound resilience. Any material can be used, but the material of the clamp C is preferably harder than the material of the branch pipe B described above so that it can be easily mounted in the groove 21.

[Example of usage]
Next, an example in which the branch pipe 1 with a clamp is used in a hemodialysis circuit will be described.
A heparin tube is connected to the first tube 15 as a main tube T1 and to the second tube 16 as a branch tube T2.
(1) At the start of dialysis treatment, the engaging protrusion 4 and the engaging portion 6 of the clamp C are engaged, and the branch tube T2 is pressed and held between the holding portion 7a and the holding portion 7b, and the flow path is set. Block it.
(2) When heparin is administered to the main tube T1 during dialysis treatment (when blood is circulated through the main tube T1), the engagement between the engaging protrusion 4 and the engaging portion 6 of the clamp C is released. Then, the engaging projection 4 and the locking portion 6 that press and hold the branch tube T2 are also opened, and heparin is administered to the main tube T1.
When heparin is no longer required, the operation (1) is performed. When the heparin is required again, the operation (2) is performed.
The above usage method is the same when the “priming tube” and the other “chemical solution injection tube” are used as the branch tube T2.

  In addition to the hemodialysis circuit, the branch pipe 1 with a clamp according to the present invention is also applicable to other medical devices in which a “priming tube” and a “medical solution injection tube” are connected to a branch portion (substantially T-shaped tube, substantially Y-shaped tube). Can be applied.

Schematic diagram of branch pipe 1 with clamp of the present invention Schematic of branch pipe B before mounting clamp C of branch pipe 1 with clamp of the present invention Schematic which shows another example of the branch pipe B of FIG. Sectional view when branch tube T2 of branch pipe 1 with clamp of the present invention is closed

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch pipe B with a clamp Branch pipe C Clamp 2 Bottom part 3 Sealing member 4 Moving means (engagement protrusion)
5 engaging groove 6 movable means (locking portion)
7a, 7b Clamping means (clamping part)
8 Connection portion 10a, 10b Insertion hole 14 Connection portion 15 First tube 16 Second tube 18 (second flow path) Branch portion 21 Groove 22a, 22b Rib T tube T1 Main tube T2 Branch tube KB (Branch portion B) Mounting part KC (Clamp C) mounting part

Claims (4)

At least the holding means (7a, 7b) of the branch tube (T2), the insertion hole (10) of the branch tube (T2), the movable means (4, 6) of the holding means (7a, 7b), and the mounting portion (KC) )
A clamp (C) formed by the movable means (4, 6) so that the clamping means (7a, 7b) can close the branch tube (T2);
A branch pipe (B) having a first pipe (15) connecting the main tube (T1) and a second pipe (16) connecting the branch tube (T2);
A clamp characterized in that a mounting part (KB) is formed on the second pipe (16) of the branch pipe (B), and the mounting part (KC) of the clamp (C) is mounted on the mounting part (KB). Attached branch pipe (1). The clamp (C) has a clamping part (7a) at the lower part of the sealing member (3) and a clamping part (7b) at the upper part of the bottom part (2) as clamping means (7a, 7b) for the branch tube (T2). Forming,
The bottom part (2) and the sealing member (3) are integrally formed via a connecting part (8) that is connected to each other.
As the movable means (4, 6) of the clamping means (7a, 7b), an engaging protrusion (4) is formed at the tip of the sealing member (3), and the connecting part (14) rising from the bottom (2) A locking portion (6) that engages with the engaging protrusion (4) is formed on the upper portion of
The branch pipe (1) with a clamp according to claim 1, which is a clamp (C) in which an insertion hole (10b) of the branch tube (T2) is formed in the connecting portion (14). The mounting portion (KB) of the branch pipe (B) is two ribs (22a, 22b) and a groove (21) formed between the two ribs (22a, 22b),
The mounting part (KC) of the clamp (C) is a part of an insertion hole (10a) and / or a connection part (8) around the insertion hole (10a). The branch pipe (1) with a clamp according to 2.   A medical device comprising the branch pipe (1) with a clamp according to any one of claims 1 to 3.

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