JP2001353220A - Clamp device of medical flexible tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp device of a medical flexible tube preventing the clamp device from being dislocated in the axial direction of the flexible tube even when clamping plural flexible tubes having different outer diameters and capable of improving workability when using a blood circuit. SOLUTION: In this clamp device of the medical flexible tube for clamping the flexible tube by approaching a first projecting part 13 and a second projecting part 15 by engaging one end part 12 of an intermediate part 16 with a stopper 17 by deflecting the part 16, an inserting hole 16a formed in the intermediate part 16 is plural holes 16aa and 16ab almost adjusted to the respective outer diameters in the plural flexible tubes mutually different in outer diameters.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for clamping a medical flexible tube constituting an extracorporeal circuit such as a blood circuit, an auxiliary circuit, or an infusion line, and cutting off the flow of fluid at the site. The present invention relates to a medical flexible tube clamping device.

[0002]

2. Description of the Related Art In general, a blood circuit in a dialysis device or the like includes:
It is mainly composed of a flexible tube through which blood or physiological saline of a patient or a medicine to be administered at a medical site is flown, and connects between components such as a dialyzer and a chamber. Conventionally, as shown in FIG. 5, a clamp device for blocking a desired portion of the flexible tube is provided with one end portion 102, an insertion hole 104a and a stopper 1a.
07 is formed mainly from the other end portion 104 in which the through hole 07 is formed and the intermediate portion 106 in which the insertion hole 106a is formed.

In addition, one end 1 of the clamp device 101
02 and the other end portion 104 have convex portions 103 facing each other.
And 105 are formed, and the insertion holes 104a and 10
After the flexible tube T is inserted through the intermediate portion 106 a
To bend the one end 102 to the stopper 10 at the other end 104.
7, the convex portions 103 and 105 are configured to clamp the flexible tube T and block the flow of the fluid at that portion.

[0004]

However, the above-mentioned conventional clamping device has the following problems. That is, among the plurality of flexible tubes constituting the blood circuit, flexible tubes having different outer diameters may be connected, but the insertion holes 104a and the insertion holes 106 in the conventional clamp device are used.
“a” corresponds to only a flexible tube having a specific outer diameter because the diameter of the opening shape is formed substantially constant.

Accordingly, when clamping a flexible tube having a smaller outer diameter, the insertion holes 104a and 106a
When the clearance between the opening of the flexible tube and the outer peripheral surface of the flexible tube is increased, and the clamping force by the convex portions 103 and 105 is weak, there is a possibility that the clamping device is shifted in the axial direction of the flexible tube.

In addition, when the outer diameter of the flexible tube to be clamped becomes smaller, the clamping force of the convex portions 103 and 105 becomes relatively small (the proximity distance between the convex portions 103 and 105 does not change. When clamping a thin flexible tube with a small thickness, the deformation of the flexible tube at the clamped portion is reduced and the clamping force is also reduced, so that the clamping device may be displaced in the axial direction of the flexible tube. Is relatively high.

[0007] When the clamp device is displaced in this way, it is necessary to return the clamp device to its original position, which may deteriorate the workability in using the blood circuit. In many cases, urgent and reliable work is required, and there is a demand for improvement regarding such deterioration of workability.

[0008] The present invention has been made in view of such circumstances, and when clamping a plurality of flexible tubes having different outer diameters, it is possible to prevent the clamping device from shifting in the axial direction of the flexible tube. It is an object of the present invention to provide a medical flexible tube clamp device which can prevent the blood circuit from being used and improve the workability in using the blood circuit.

[0009]

According to the first aspect of the present invention,
One end having a first projection formed thereon, the other end having a second projection opposed to the first projection, an intermediate portion connected to the one end and the other end, and the other end And an insertion portion formed at the other end and the intermediate portion, and an insertion hole through which a flexible tube can be inserted, and the intermediate portion is bent. When the one end is engaged with the engaging portion, the first convex portion and the second convex portion are close to each other and clamp the flexible tube inserted into the two insertion holes,
In the medical flexible tube clamp device for interrupting the flow of fluid at the site, at least one of the insertion holes formed at the other end and the intermediate portion has a plurality of flexible holes having different outer diameters from each other. A plurality of holes substantially matching the respective outer diameters of the tube, wherein each of the flexible tubes can be locked.

According to such a configuration, when a flexible tube having a specific outer diameter is clamped, the flexible tube having a different outer diameter is locked while the flexible tube is locked by a hole corresponding to the outer diameter. When the flexible tube is clamped, the flexible tube can be locked by a hole corresponding to the outer diameter of the flexible tube.

According to the second aspect of the present invention, between one of the plurality of holes and another adjacent thereto, there is provided a separating portion projecting in a direction separating the holes. It is characterized by.

According to this configuration, the flexible tube inserted into the one hole is locked by the insertion hole and the projection.

According to the third aspect of the present invention, the insertion hole is formed by connecting a large-diameter hole and a small-diameter hole.

[0014]

Embodiments of the present invention will be specifically described below with reference to the drawings. The medical flexible tube clamping device according to the embodiment of the present invention is applied to, for example, the blood circuit 1 shown in FIG. The blood circuit 1 circulates the patient's blood extracorporeally for the purpose of artificial dialysis treatment, and in the course of transfusion (replenishment of physiological saline during priming. Performed), blood transfusion (performed appropriately by the patient to be dialyzed), blood purification, and the like.

In the blood circuit 1 shown in FIG. 1, a plurality of flexible tubes a to f, indwelling needle connectors 2 and 3 fixed to the tips of the flexible tubes a and f, and a blood pump 4 abut. Flexible tube 4a and drip chamber 5,
6 and tubes g, h connected to form an infusion line
And a transfusion chamber 8, and a dialyzer 7, which is a blood purifier, is disposed between the flexible tubes d and e.

The indwelling needle connection connector 2 has an indwelling needle connected to the tip thereof, and punctures the indwelling needle into an artery of a patient to collect blood. The collected blood is disposed downstream therefrom. After being purified through the respective components such as the dialyzer 7, the blood is returned to the body from the indwelling needle that is connected to the distal end of the indwelling needle connection connector 3 and punctured the vein of the patient.

A T-tube 9 is provided at the downstream end of the flexible tube a.
Is connected to the T-tube 9. In addition to the flexible tube a, the flexible tube b and the flexible tube g of the infusion line are connected to the T tube 9.
And are connected. A flexible tube 4 having a relatively large outer diameter is provided between the flexible tube b and the flexible tube c.
a with the flexible tube 4a
By rotating the blood pump 4 while squeezing, the blood introduced into the blood circuit 1 is circulated from the indwelling needle connector 2 to the indwelling needle connector 3.

Drip chambers 5 and 6 are provided between the flexible tube c and the flexible tube d and between the flexible tube e and the flexible tube f, respectively. Air bubbles in the blood circuit 1 are removed by the chambers 5 and 6. Note that the blood circuit may be provided only between the flexible tube e and the flexible tube f without the drip chamber 5 and only the drip chamber 6.

A dialyzer 7 is provided between the flexible tube d and the flexible tube e to purify blood flowing through the blood circuit 1. The dialyzer 7 to be applied includes, for example, a hollow fiber blood purifier. This hollow fiber type blood purifier allows blood to pass through an internal hollow fiber membrane and a dialysate inlet 7a.
The dialysate introduced from above is passed between the outside of the hollow fiber membrane and the purifier main body (housing) and is led out from the dialysate outlet 7b. Removal of excess water in the body, correction of electrolytes, uremia It is for removing diseased substances.

On the other hand, an infusion chamber 8 is provided at the other end of the flexible tube g connected to the T-tube 9, and is connected to the infusion container 10 via the flexible tube h and the connection portion 10a. Before the infusion or blood transfusion therein is introduced into the path formed by the flexible tubes a to f, it is configured to control the foam.
And these flexible tubes g, flexible tubes h,
And an infusion chamber 8 constitute an infusion line.

A flexible tube i forming an anticoagulant liquid supply line is connected via a T tube 19 to a flexible tube c between the flexible tube 4a and the drip chamber 5. It is configured to inject a drug for preventing blood coagulation from a supply means connected to the connector 18 at the tip.

At the upper ends of the drip chambers 5 and 6,
Flexible tubes j and l forming level adjustment lines having connectors 20 and 21 at the ends are connected, and the liquid levels of the drip chambers 5 and 6 are adjusted to arbitrary positions by these lines. Further, a tube k forming a pressure monitor line having a connector 22 at the tip thereof connected to the pressure monitor mechanism of the dialysis device is connected to the upper end of the drip chamber 6.
It is configured to monitor the internal pressure. The outer diameters of the flexible tubes a to f are substantially the same, and the outer diameter of the flexible tube i is smaller than that.

Here, the clamp device according to the embodiment of the present invention is to be attached to a desired position among the flexible tubes a to h.
To h, to block blood, physiological saline, drugs such as infusions and anticoagulants, etc. flowing in the flexible tubes a to h. Hereinafter, the case where the flexible tube a is clamped will be described, but the flexible tube to be clamped may be another flexible tube b to l.

In the medical flexible tube clamping apparatus, each component as shown in FIG. 1 is integrally formed of resin, and one end 12 having a first convex portion 13 formed therein and a first The appearance is mainly composed of the other end portion 14 on which the two convex portions 15 are formed and the intermediate portion 16. The material of the clamp device 11 is polypropylene, but may be made of another material (other olefin resin, polyacetal, polyethylene, or the like).

The one end portion 12 has a first convex portion 13 which is formed to extend downward from the inner surface (lower surface) thereof. As shown in FIG. Protrusions 12a are formed from both ends, and the other end 14 is formed so that the other end 14 can be inserted between these protrusions 12a. Therefore, when the one end 12 and the other end 14 approach each other at the time of clamping, The configuration is such that they can be guided together. Incidentally, the projection 12a for the guide may not be formed,
The width of the distal end of the one end 12 may be substantially the same as the width of the distal end of the other end 14 (the width of the stopper 17).

The other end 14 is, as shown in FIG.
The portion 14b extends from a portion 14b extending substantially horizontally to a portion 14c rising to the one end portion 12 side. The portion 14b has a second portion extending upward from an inner surface (upper surface) thereof and facing the first convex portion 13. The projection 15 is formed. In addition, the second convex portion 15
Like the first convex portion 13, the distal end is formed to have an arc-shaped cross section, and is configured so that no shear force acts when the flexible tube a is clamped.

Further, an insertion hole 14a through which the flexible tube a can be inserted is formed at a portion 14c of the other end portion 14, and a stopper 17 is formed at the distal end side. The stopper 17 is for engaging the one end 12, and has a step 17 a formed on the inner side (left side in FIG.
The end of one end 12 abuts on the middle part 16.
And restricts the upward movement due to the elasticity of the engagement.

The intermediate portion 16 includes one end 12 and the other end 14.
When a force F for clamping is applied to the one end 12, the one end 12 bends toward the other end 14. An insertion hole 16 a through which the flexible tube a can be inserted is formed in the intermediate portion 16 at a position facing the insertion hole 14 a formed in the other end portion 14.

The insertion hole 16a is formed by connecting a large-diameter hole 16aa and a small-diameter hole 16ab, and the large-diameter hole 16aa substantially matches the flexible tube a in the blood circuit 1. Hole 16ab having a small diameter while having a diameter
Has a diameter substantially matching the flexible tube i in the blood circuit 1. That is, when clamping a tube having a large outer diameter such as the flexible tube a, the flexible tube a is inserted through the large-diameter hole 16aa and the insertion hole 14a, and the outer tube is clamped as the flexible tube i. When clamping a small-diameter tube, the flexible tube i is inserted into the small-diameter hole 16ab.
And the insertion hole 14a.

The large-diameter hole 16aa and the small-diameter hole 16a
b, there is a separating portion 16b protruding in a direction for separating these holes. As shown in FIG. 2, the separating portion 16b is composed of two convex portions protruding in a direction facing each other in an adjacent portion between the large-diameter hole 16aa and the small-diameter hole 16ab. Surface 16ba is continuous with the inner peripheral surface of the large-diameter hole 16aa.
a, and the small-diameter side surface 16bb is configured to be continuous with the inner peripheral surface of the small-diameter hole 16ab to form a part of the small-diameter hole 16ab.

When the flexible tube i is inserted into the small-diameter hole 16ab as shown in the figure by the separating portion 16b, the flexible tube i is locked by the inner peripheral surface of the small-diameter hole 16ab. At the same time, it is possible to prevent the flexible tube i from being disengaged by the small-diameter hole 16ab by entering the large-diameter hole 16aa and displacing the clamp device 11.

Next, the operation of the medical flexible tube clamping device will be described. First, a flexible tube a (or another flexible tube having the same outer diameter as this) may be inserted in advance into each of the large-diameter holes 16aa of the insertion hole 14a and the insertion hole 16a. And
When it becomes necessary to shut off the fluid flowing through the flexible tube a, the user applies a force F to the one end 12 with a fingertip to deflect the intermediate portion 16 and move the one end 12 to the other end. Part 14
Side to engage the stopper 17.

In addition to the above-described clamp device having the same shape, a flexible tube i (or another flexible tube having the same outer diameter as this) may be previously inserted into the insertion hole 14a and the insertion hole. 16a is inserted into each of the small-diameter holes 16ab, and when it becomes necessary to block the medicine passing through the flexible tube i, the user applies a force F to the one end 12 with his fingertip.
, The intermediate portion 16 is bent and the one end 12
Is moved to the other end 14 side to engage with the stopper 17.

According to the medical flexible tube clamping device according to the present embodiment, the outer peripheral surface of each of the flexible tubes a or i has the large-diameter hole 16aa or the small-diameter hole 16ab.
Since at least a part of the flexible tube comes into contact with and engages with the inner peripheral surface of the flexible tube, it is possible to clamp the flexible tube while preventing the displacement of the clamp device 11 in the axial direction. Therefore, the operation of returning the displaced clamp device to the original position is not required, and the workability at the time of using the clamp device can be improved.

Next, a medical flexible tube clamping device according to another embodiment of the present invention will be described with reference to FIG. Note that the same components as those in the previous embodiment are denoted by the same reference numerals.

In this clamp device, an insertion hole 16a composed of four holes 16c to 16f is formed in an intermediate portion 16 of the clamp device. . That is, when clamping a flexible tube having an arbitrary outer diameter, a hole substantially matching the outer diameter of the flexible tube can be selected and inserted from the holes 16c to 16f.

In each of the four holes 16c-f, between adjacent holes (holes 16c and 16d, holes 16d and 16e, and between holes 16e and 16f), the same as in the previous embodiment. A separating portion 16b is formed to prevent a flexible tube inserted through a desired hole from entering an adjacent hole (a hole having a diameter larger than the diameter of the desired hole). ing.

In the present embodiment, four holes 16c to 16f are formed. However, a larger number of holes may be formed. In this case, as the number of holes increases, the number of corresponding flexible tubes also increases. Therefore, a clamp device having an insertion hole through which more flexible tubes having different outer diameters can be inserted while being locked is provided. can do.

Although the present embodiment has been described above, the present invention is not limited to this.
The insertion hole 14a formed in 4 may be formed of a plurality of holes having different outer diameters, and both the insertion hole 14a and the insertion hole 16a may be formed of a plurality of holes having different diameters. . Note that the step 17a of the stopper 17 may be formed so as to be 180 degrees opposite to the illustrated side (that is, rightward in FIG. 1B). In this case, the clamping function as the clamping device 11 is the same as that illustrated. It is.

In the present embodiment, the clamp device is applied to a blood circuit. However, a flexible tube (corresponding to g and h in the present embodiment) forming an infusion line and an anticoagulant liquid sending line can be formed. A flexible tube (corresponding to i in this embodiment), a level adjustment line (corresponding to j and l in this embodiment), or a flexible tube (corresponding to k in this embodiment) forming a pressure monitoring line are different from each other. Even if it has an outer diameter, it can be applied to these. The material constituting the clamp device is not limited to the resin described above, and may be made of another material as long as the intermediate portion is bent so that the tip of one end and the stopper can be engaged.

[0041]

According to the first aspect of the present invention, even when a plurality of flexible tubes having different outer diameters are clamped, it is possible to prevent the clamping device from being displaced in the axial direction of the flexible tubes and to prevent blood from being displaced. Workability in using the circuit can be improved.

According to the second aspect of the present invention, since the flexible tube inserted into one hole is locked by the insertion hole and the projection, the flexible tube inserted through the small-diameter hole is connected to the flexible tube. It is possible to prevent entry into the adjacent large-diameter hole.

According to the third aspect of the present invention, it is possible to cope with clamping of two flexible tubes having different outer diameters.

[Brief description of the drawings]

FIG. 1A is a plan view showing a medical flexible tube clamping device according to an embodiment of the present invention, FIG.
(C) Same left side view

FIG. 2 is an enlarged view of the vicinity of an insertion hole in the medical flexible tube clamping device according to the embodiment of the present invention.

FIG. 3 is a left side view showing a medical flexible tube clamping device according to another embodiment of the present invention.

FIG. 4 is a schematic view showing a blood circuit to which the medical flexible tube clamping device according to the embodiment of the present invention is applied;

5A is a plan view showing a conventional medical flexible tube clamping device, FIG. 5B is a front view thereof, and FIG. 5C is a left side view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Blood circuit 2, 3 ... Indwelling needle connection connector 4 ... Blood pump 5, 6 ... Drip chamber 7 ... Dialyzer 8 ... Infusion chamber 9, 19 ... T tube 10 ... Infusion container 10a ... Connection part 11, 101 ... Clamping device 12 , 102 ... one end 12a ... projection 13 ... first projection 14, 104 ... other end 14a, 16a, 104a, 106a ... insertion hole 16aa ... large diameter hole 16ab ... small diameter hole 16b ... separation part 16ba ... Large-diameter surface 16bb Small-diameter surface 16c-f Plural holes 15 Second convex portion 16, 106 Intermediate portion 17, 107 Stopper 17 Step 18, 20, 22 Connector 103, 105 convex Part 18: Connector al, 4a, T: Flexible tube

Claims (3)

[Claims] An end portion having a first convex portion, a second end portion having a second convex portion facing the first convex portion, and an intermediate portion connected to the one end portion and the other end portion. An engagement portion formed at the other end portion to engage the one end portion; and an insertion hole formed at the other end portion and the intermediate portion, through which a flexible tube can be inserted. When the one end portion is engaged with the engagement portion by bending the portion, the first convex portion and the second convex portion come close to each other and clamp the flexible tube inserted into the two insertion holes. In the medical flexible tube clamp device for interrupting the flow of fluid at the site, at least one of the insertion holes formed at the other end and the intermediate portion may have a plurality of outer diameters different from each other. A plurality of holes substantially matching the respective outer diameters of the flexible tube,
A medical flexible tube clamping device, wherein each of the flexible tubes can be locked. 2. The medical device according to claim 1, further comprising a separating portion protruding in a direction separating the holes between one of the plurality of holes and the other hole. Flexible tube clamping device. 3. The insertion hole according to claim 1, wherein a large diameter hole and a small diameter hole are formed continuously.
Alternatively, the medical flexible tube clamping device according to claim 2.