JP4754049B2 - Medical flexible tube clamping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical flexible tube for clamping a medical flexible tube constituting an extracorporeal circuit such as a blood circuit, an auxiliary circuit, or an infusion line, and blocking the flow of fluid at the site. The present invention relates to a clamping device.
[0002]
[Prior art]
In general, a blood circuit in a dialysis machine or the like is mainly composed of a flexible tube that allows a patient's blood, physiological saline, or medicine to be administered to flow in a medical field, and connects each component such as a dialyzer and a chamber. Is. Conventionally, as shown in FIG. 5, the clamping device for blocking a desired portion of the flexible tube has one end portion 102, the other end portion 104 in which the insertion hole 104a and the stopper 107 are formed, and the insertion hole 106a. The intermediate portion 106 was mainly formed.
[0003]
Further, convex portions 103 and 105 facing each other are formed at one end portion 102 and the other end portion 104 of the clamp device 101, and after inserting the flexible tube T into the insertion holes 104a and 106a, the intermediate portion When the portion 106 is bent and the one end portion 102 is engaged with the stopper 107 of the other end portion 104, the convex portions 103 and 105 clamp the flexible tube T and block the fluid flow at that portion. It had been.
[0004]
[Problems to be solved by the invention]
However, the 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. However, the insertion hole 104a and the insertion hole 106a in the conventional clamping device have an opening shape. Since the diameter of the tube is substantially constant, it corresponds only to a flexible tube having a specific outer diameter.
[0005]
Therefore, when clamping a flexible tube having an outer diameter smaller than that, the clearance between the opening of the insertion holes 104a and 106a and the outer peripheral surface of the flexible tube increases, and the clamping force by the convex portions 103 and 105 is weak. In this case, there is a possibility that the clamp device is displaced in the axial direction of the flexible tube.
[0006]
In addition, when the outer diameter of the flexible tube to be clamped is small, the clamping force by the convex portions 103 and 105 is relatively small (the proximity distance between the convex portions 103 and 105 does not change. When clamping a thin flexible tube with a small diameter, since the deformation of the flexible tube at the clamping site is small and the clamping force is also small), the possibility that the clamping device is displaced in the axial direction of the flexible tube is relatively Get higher.
[0007]
When the clamp device is displaced as described above, it is necessary to return the clamp device to the original position, which may cause deterioration of workability in the use of the blood circuit. In many cases, certain work is required, and there is a demand for improvement with respect to the deterioration of workability.
[0008]
The present invention has been made in view of such circumstances, and prevents the clamping device from shifting in the axial direction of the flexible tube even when clamping a plurality of flexible tubes having different outer diameters. Another object of the present invention is to provide a medical flexible tube clamping device capable of improving workability in the use of a blood circuit.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is connected to the one end portion on which the first convex portion is formed, the other end portion on which the second convex portion facing the first convex portion is formed, and the one end portion and the other end portion. An intermediate portion, an engagement portion formed at the other end portion to engage the one end portion, an insertion hole formed at the other end portion and the intermediate portion, and through which a flexible tube can be inserted; When the intermediate portion is bent and the one end portion is engaged with the engaging portion, the first convex portion and the second convex portion come close to each other and the flexible tube is inserted through the two insertion holes. In the medical flexible tube clamping device that blocks the flow of fluid at the site, at least one of the insertion holes formed in the other end portion and the intermediate portion has a plurality of different outer diameters. shape and continuous large diameter that is substantially matched to the respective outer diameter of the flexible tube of the hole and the small-diameter hole A plurality of holes, while being capable locking each of said flexible tube, over and either the insertion hole of the plurality of holes are selected according to the diameter of the flexible tube clamp The flexible tube can be inserted.
[0010]
According to this configuration, when a flexible tube having a specific outer diameter is clamped, the flexible tube is locked by a hole that matches the outer diameter, while a flexible tube having a different outer diameter is used. When clamping, the flexible tube can be locked by a hole that matches the outer diameter.
[0011]
According to a second aspect of the present invention, there is provided a separating portion projecting in a direction separating the holes between one hole of the plurality of holes and another hole adjacent thereto. To do.
[0012]
According to this configuration, the flexible tube inserted through the one hole is locked by the insertion hole and the protrusion.
[0013]
According to the invention of claim 3, wherein, prior Symbol plurality of holes, characterized by being formed continuous plurality in a vertical direction in the other of said insertion hole and opposed position.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described 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 artificial dialysis treatment, and in the middle of the transfusion (supplementation of physiological saline at the time of priming, supplementation of the infusion fluid mixed by the patient to be dialyzed appropriately) Or blood transfusion (performed as appropriate by the patient to be dialyzed), blood purification, and the like.
[0015]
In the blood circuit 1 shown in the figure, a plurality of flexible tubes a to f, indwelling needle connectors 2 and 3 fixed to the distal ends of the flexible tubes a and f, and a blood pump 4 can be brought into contact with each other. It is mainly composed of a flexible tube 4a, drip chambers 5 and 6, tubes g and h connected to form an infusion line, and an infusion chamber 8. Between the flexible tubes d and e, A dialyzer 7 that is a blood purifier is provided.
[0016]
The indwelling needle connection connector 2 is connected to an indwelling needle at the tip of the indwelling needle connector 2 and punctures the indwelling needle into a patient's artery to collect blood. The collected blood is a dialyzer disposed downstream thereof. After being purified through the components such as 7, the blood is returned to the body from the indwelling needle connected to the distal end of the indwelling needle connector 3 and punctured into the patient's vein.
[0017]
A T tube 9 is connected to the downstream end of the flexible tube a, and in addition to the flexible tube a, a flexible tube b and a flexible tube g of the infusion line are connected to the T tube 9. It is connected. A flexible tube 4a having a relatively large outer diameter is interposed between the flexible tube b and the flexible tube c, and the blood pump 4 squeezes the flexible tube 4a. By rotating, the blood introduced into the blood circuit 1 is circulated from the indwelling needle connection connector 2 side to the indwelling needle connection connector 3 side.
[0018]
Drip chambers 5 and 6 are disposed between the flexible tube c and the flexible tube d and between the flexible tube e and the flexible tube f, respectively. 6, the air bubbles in the blood circuit 1 are removed. The drip chamber 5 may not be provided, and only the drip chamber 6 may be a blood circuit provided between the flexible tube e and the flexible tube f.
[0019]
A dialyzer 7 is disposed between the flexible tube d and the flexible tube e to purify blood flowing through the blood circuit 1. An example of the dialyzer 7 to be applied is a hollow fiber blood purifier. This hollow fiber type blood purifier allows blood to pass through an internal hollow fiber membrane and allows dialysate introduced from the dialysate introduction port 7a to pass between the outside of the hollow fiber membrane and the purifier body (housing). Between the fluid and the dialysate outlet 7b to remove excess water in the body, correct the electrolyte, remove the uremic substance, and the like.
[0020]
On the other hand, an infusion chamber 8 is disposed at the other end of the flexible tube g connected to the T tube 9, and the infusion solution in the infusion container 10 connected via the flexible tube h and the connecting portion 10a. Or it is comprised so that foam may be controlled before introducing blood transfusion into the path | route which flexible tube af comprises. The flexible tube g, the flexible tube h, and the infusion chamber 8 constitute an infusion line.
[0021]
Further, a flexible tube c between the flexible tube 4a and the drip chamber 5 is connected to a flexible tube i forming an anticoagulant feeding line via a T tube 19, and the tip thereof A medicine for preventing blood coagulation is injected from a supply means connected to the connector 18.
[0022]
The upper ends of the drip chambers 5 and 6 are connected to flexible tubes j and l forming a level adjustment line having connectors 20 and 21 at the ends, and the liquid level of the drip chambers 5 and 6 can be arbitrarily set by such lines. The position is adjusted. Further, a tube k forming a pressure monitoring line having a connector 22 connected to the pressure monitoring mechanism of the dialysis device is connected to the upper end of the drip chamber 6, and the pressure in the blood circuit 1 is monitored by such a line. It is configured to The outer diameters of the flexible tubes a to f are substantially the same, and the flexible tube i has a smaller outer diameter.
[0023]
Here, the clamping device according to the embodiment of the present invention is attached to a desired portion of the flexible tubes a to h, and clamps the flexible tubes a to h to enable the clamping. It blocks blood flowing through the flexible tubes a to h, physiological saline, or drugs such as infusions and anticoagulants. Hereinafter, although the case where the flexible tube a is clamped is described, the flexible tubes to be clamped may be other flexible tubes b to l.
[0024]
Such a medical flexible tube clamping device is such that each component as shown in FIG. 1 is integrally formed of a resin, one end 12 having a first protrusion 13 formed thereon, and a second protrusion. The external appearance is mainly composed of the other end portion 14 on which 15 is formed and the intermediate portion 16. In addition, although the material of the clamp apparatus 11 is a polypropylene, it is good also as what consists of another material (an other olefin resin, polyacetal, polyethylene, etc.).
[0025]
The one end portion 12 has a convex first convex portion 13 formed to extend downward from the inner surface (lower surface), and as shown in FIG. Since the projections 12a are formed and the other end 14 can be inserted between the projections 12a, when the one end 12 and the other end 14 approach each other during clamping, they are guided to each other. It is set as the structure to obtain. The guide protrusion 12a does not have to be formed, and the width of the tip end side of the one end portion 12 is substantially the same as the width of the tip end side of the other end portion 14 (the width of the stopper 17). There may be.
[0026]
The other end portion 14 is formed from a portion 14b extending substantially horizontally to a portion 14c standing on the one end portion 12 side, as shown in FIG. ) To the upper side, and a second convex portion 15 facing the first convex portion 13 is formed. In addition, the 2nd convex part 15 is comprised so that a shear force may not act when the flexible tube a is clamped like the 1st convex part 13, and the front-end | tip is formed in the cross-sectional arc shape.
[0027]
In addition, an insertion hole 14a through which the flexible tube a can be inserted is formed in the portion 14c of the other end portion 14, and a stopper 17 is formed on the distal end side thereof. The stopper 17 is for engaging the one end portion 12, and the tip end of the one end portion 12 abuts on a step 17 a formed on the inner side (left side in FIG. 5B), and the one end portion 12 is in the middle portion 16. It is engaged by restricting the upward movement due to the elastic force.
[0028]
The intermediate portion 16 is formed to be connected to the one end portion 12 and the other end portion 14. When a force F for clamping is applied to the one end portion 12, the one end portion 12 bends so as to approach the other end portion 14. ing. In the intermediate portion 16, an insertion hole 16 a through which the flexible tube a can be inserted is formed at a position facing the insertion hole 14 a formed in the other end portion 14.
[0029]
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 has a diameter that substantially matches the flexible tube a in the blood circuit 1. On the other hand, the small-diameter hole 16ab has a diameter that substantially matches the flexible tube i in the blood circuit 1. That is, when a tube having a large outer diameter such as the flexible tube a is clamped, the flexible tube a is inserted into the large-diameter hole 16aa and the insertion hole 14a, and the outer tube such as the flexible tube i is inserted. When clamping a tube having a small diameter, the flexible tube i is inserted into the small-diameter hole 16ab and the insertion hole 14a.
[0030]
Further, between the large-diameter hole 16aa and the small-diameter hole 16ab, there is a separating portion 16b protruding in a direction separating the holes. As shown in FIG. 2, the separating portion 16b is composed of two convex portions projecting in directions facing each other in the adjacent portion of the large-diameter hole 16aa and the small-diameter hole 16ab. The surface 16ba is continuous with the inner peripheral surface of the large-diameter hole 16aa and forms a part of the large-diameter hole 16aa, and the small-diameter side surface 16bb is continuous with the inner peripheral surface of the small-diameter hole 16ab. It is comprised so that a part of hole 16ab of this may be comprised.
[0031]
When the flexible tube i is inserted into the small-diameter hole 16ab, for example, as shown in the same figure, the flexible tube i is locked by the inner peripheral surface of the small-diameter hole 16ab. It is possible to prevent the clamp device 11 from being displaced by entering the large-diameter hole 16aa and unlocking the flexible tube i by the small-diameter hole 16ab.
[0032]
Next, the operation of the medical flexible tube clamping device will be described.
First, the flexible tube a (or another flexible tube having the same outer diameter as this) may be inserted in advance into each of the insertion hole 14a and the large-diameter hole 16aa in the insertion hole 16a. And when the necessity of interruption | blocking of the fluid which passes through the inside of the flexible tube a arises, a user applies the force F to the one end part 12 with a fingertip, and bends the intermediate part 16 and makes the one end part 12 bend. Move to the other end 14 side and engage with the stopper 17.
[0033]
A clamp device that is separate from the above and has the same shape is also provided with a flexible tube i (which may be another flexible tube having the same outer diameter) as the small diameter in the insertion hole 14a and the insertion hole 16a. When the medicine passing through the flexible tube i needs to be blocked, the user applies a force F to the one end portion 12 with a fingertip, so that the intermediate portion is inserted. 16 is bent to move the one end portion 12 to the other end portion 14 side and engage with the stopper 17.
[0034]
According to the clamp apparatus for a medical flexible tube according to the present embodiment, the outer peripheral surface of each of the flexible tubes a or i is at least partly the inner peripheral surface of the large-diameter hole 16aa or the small-diameter hole 16ab. Since it contacts and engages, it can clamp, preventing that the clamp apparatus 11 shifts | deviates to the axial direction of these flexible tubes. Therefore, it is not necessary to return the displaced clamping device to its original position, and workability when using the clamping device can be improved.
[0035]
Next, a medical flexible tube clamping device according to another embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component similar to previous embodiment.
[0036]
Such a clamping device is formed with an insertion hole 16a formed of four holes 16c to f in the intermediate portion 16, and the diameters of these holes 16c to 16f are different from each other because they are successively reduced. That is, when clamping a flexible tube having an arbitrary outer diameter, it is possible to select and insert a hole substantially matching the outer diameter of the flexible tube from the holes 16c to 16f.
[0037]
Further, between the four holes 16c to 16f adjacent to each other (the holes 16c and 16d, the holes 16d and 16e, and the holes 16e and 16f), the same separation portion as in the previous embodiment is provided. 16b is formed so that the flexible tube inserted into the desired hole can be prevented from entering the adjacent hole (the hole side having a diameter larger than the desired hole diameter).
[0038]
In this embodiment, four holes 16c to f are formed, but a larger number of holes may be formed. In this case, since the number of the holes increases, the corresponding flexible tube also increases, so a clamp device provided with an insertion hole that can be inserted while locking more flexible tubes with different outer diameters is provided. can do.
[0039]
Although the present embodiment has been described above, the present invention is not limited to this. For example, the insertion hole 14a formed in the other end portion 14 may be composed of a plurality of holes having different outer diameters. In addition, both the insertion hole 14a and the insertion hole 16a may be composed of a plurality of holes having different diameters. The step 17a in the stopper 17 may be formed so as to be opposite to the illustrated 180 degrees (that is, facing right in FIG. 1B). In this case, the clamping function as the clamping device 11 is the same as that illustrated. It is.
[0040]
In the present embodiment, the clamping device is applied to a blood circuit, but a flexible tube forming an infusion line (corresponding to g and h in the present embodiment) and a flexible tube forming an anticoagulant feeding line. (Corresponding to i in this embodiment), level adjustment lines (corresponding to j and l in this embodiment), or flexible tubes (corresponding to k in this embodiment) forming pressure monitoring lines have different outer diameters. Even if it has, it is applicable to these. The material forming the clamp device is not limited to the resin described above, and may be made of other materials as long as the intermediate portion can be bent and the tip of the one end can be engaged with the stopper.
[0041]
【The invention's effect】
According to the first aspect of the present invention, the clamping device is prevented from shifting in the axial direction of the flexible tube even when clamping a plurality of flexible tubes having different outer diameters, and the operation in using the blood circuit is performed. Can be improved.
[0042]
According to the invention of claim 2, since the flexible tube inserted through the one hole is locked by the insertion hole and the protrusion, the flexible tube inserted through the small diameter hole is adjacent to the large tube. It is possible to prevent entry into a hole having a diameter.
[0043]
According to invention of Claim 3, it can respond to the clamp of two flexible tubes from which an outer diameter mutually differs.
[Brief description of the drawings]
1A is a plan view showing a medical flexible tube clamping device according to an embodiment of the present invention, FIG. 1B is a front view thereof, and FIG. 2C is a left side view thereof. FIG. 2 is an implementation according to the present invention. FIG. 3 is an enlarged view of the vicinity of the insertion hole in the medical flexible tube clamping device according to the embodiment. FIG. 3 is a left side view showing the medical flexible tube clamping device according to another embodiment of the present invention. FIG. 5 is a schematic view showing a blood circuit to which a medical flexible tube clamping device according to an embodiment of the present invention is applied; FIG. 5A is a plan view showing a conventional medical flexible tube clamping device; ) Front view, (c) Left side view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Blood circuit 2, 3 ... Indwelling needle connection connector 4 ... Blood pump 5, 6 ... Drip chamber 7 ... Dializer 8 ... Infusion chamber 9, 19 ... T tube 10 ... Infusion container 10a ... Connection part 11, 101 ... Clamp apparatus 12 , 102 ... one end part 12a ... projection part 13 ... first convex part 14, 104 ... other end parts 14a, 16a, 104a, 106a ... insertion hole 16aa ... large diameter hole 16ab ... small diameter hole 16b ... separation part 16ba ... Large-diameter side surface 16bb ... Small-diameter side surface 16c-f ... Multiple holes 15 ... Second convex portions 16, 106 ... Intermediate portions 17, 107 ... Stopper 17 ... Steps 18, 20-22 ... Connectors 103, 105 ... Convex Part 18: Connectors a to 1, 4a, T ... Flexible tube

Claims (3)

One end where the first convex portion is formed;
The other end formed with the second convex part facing the first convex part,
An intermediate portion connected to the one end and the other end;
An engaging portion that is formed at the other end and engages the one end;
An insertion hole formed in the other end portion and the intermediate portion and capable of inserting a flexible tube;
When the intermediate portion is bent and the one end portion is engaged with the engaging portion, the first convex portion and the second convex portion are adjacent to each other and inserted into the two insertion holes. In a medical flexible tube clamping device that clamps a flexible tube and blocks fluid flow at that site,
At least one of the insertion holes formed in the other end portion and the intermediate portion has a large-diameter hole and a small-diameter hole that substantially match the respective outer diameters of the plurality of flexible tubes having different outer diameters. A plurality of holes formed in series, each of the flexible tubes can be locked, and one of the plurality of holes selected according to the diameter of the flexible tube to be clamped and the insertion hole A medical flexible tube clamping device, characterized in that the flexible tube can be inserted therethrough.   2. The clamp for a medical flexible tube according to claim 1, further comprising a separating portion protruding in a direction separating the holes between one hole and the other hole in the plurality of holes. apparatus. 3. The medical flexible tube clamping device according to claim 1, wherein the plurality of holes are formed in a row in a longitudinal direction at a position facing the other insertion hole.

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