JPH08173526A - Blood circuit and blood circuit parts - Google Patents

Abstract

PURPOSE: To largely reduce manufacturing cost by making a simple constitution as well as reducing necessity of tube cutting and connecting parts as much as possible, making blood circuit parts easily fitted on a way of a tube, and making blood flow smoothly to improve quality. CONSTITUTION: A mixed injection button 30 is formed in such a manner that an attachment body 31 by which the button 30 is adhered to and fixed on the outer circumferentical face on a way of a tube 20 is attached, and a housing part 32 opened in the attachment body 31 is formed, and an elastic body 33 in which a specified liquid injecting needle can be pierced is inserted into the housing part 32 so that the needle adhered to the outer circumference face of the tube 20. Also, a branch tube part 53 which connects another line tubes 13, 14 for sending the specified liquid into the tube 20 is molded in one body with a joint member 50 which connects the tube 20 to both end sides of a pump segment (roller type blood pump) 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood circuit used to guide and circulate blood in the living body outside the body, and blood circuit components (mixed injection button, joint member) constituting the circuit.
It is related to the medical treatment of human beings, and it is particularly used for medical treatment of humans.

[0002]

2. Description of the Related Art Conventionally, as this type of technology, for example,
A blood circuit 1 as shown in FIG. 8 is known. Such a blood circuit 1 is generally used for extracorporeal circulation of blood in hemodialysis, artificial heart-lung, etc., and plastic molded parts 3, 4, 5 having various functions and a soft plastic tube 2 are mutually connected. A series of circuits are formed by bonding and connecting in series.

Each of the molded parts 3, 4, 5 provided in the middle of the tube 2 forming the circuit 1 is formed in such a shape that no step is formed on the inner surface of the circuit between the connecting parts 2a of the tube 2 at both ends thereof. There are adhesive connections 3a, 4a, 5a. More specifically, the blood circuit 1 for hemodialysis is generally divided into an arterial circuit shown in FIG. 8 and a vein circuit (not shown) to form a pair.

A pump segment 6 is a main part provided in the middle of the arterial circuit, and one or two mixed injection buttons 3 for mainly injecting a liquid medicine by puncture are provided before or after the pump segment 6. As shown in FIG. 9, mixed injection button 3
Is a molded part having tubular adhesive connection portions 3a, 3a at both ends thereof, and a portion 3c for accommodating a puncturable rubber or resin button 3b formed in the substantially center thereof.

Further, a T-shaped tube 4 for connecting an infusion line for injecting physiological saline or the like and a T-shaped tube 4 for connecting a line for injecting an anticoagulant in the middle of the arterial circuit.
Is provided. As shown in FIG. 10, the T-shaped pipe 4 is a molded part having tubular adhesive connection portions 4a, 4a at both ends thereof, and a branch pipe portion 4b for connecting each line formed at substantially the center. Further, as shown in FIG. 11, both end sides of the pump segment 6 are joint members 5, 5 respectively.
It is connected to the tube 2 via the, and an adhesive connection portion 5a is also formed on one end side of each joint member 5.

On the other hand, although not shown in the drawings, there is a drip chamber as a main component provided in the middle of the vein side circuit, and one or two of the above-mentioned mixed injection buttons 3 is provided before or after the drip chamber.
It is provided individually. Here, the drip chamber controls the internal pressure in the circuit.

[0007]

However, the above-mentioned conventional techniques have the following problems in terms of quality and manufacturing cost.

First, a problem in terms of quality will be described. Since blood has the property of causing coagulation when it touches a foreign substance outside the body, reducing the cause of coagulation is a basic issue of extracorporeal circulation of blood. However, the adhesive connection parts 3a, 4a, 5 of the molded parts 3, 4, 5 provided in the middle of the blood circuit 1
a is less smooth than the inner surface of the connecting portion 2a of the tube 2 and causes turbulence or stagnation in the blood flow,
This may promote thrombus formation and blood coagulation. Furthermore, the connecting portion 2a of the tube 2 and each molded part 3,
Defective adhesive connection parts 3a, 4a, 5a of 4,5 may lead to blood leakage and air suction. Therefore, it has been earnestly desired to further improve the quality of the blood circuit 1 by reducing the number of the connecting portions 2a of the tube 2 as much as possible.

Next, problems in terms of manufacturing cost will be described.
To assemble the blood circuit 1, first, the molded parts 3, 4, 5
The tube 2 is cut into an accurate length according to a predetermined dimension between them, and the molded parts 3, 4, 5 and the cut tube 2 are bonded and connected. In this case, as the number of connecting portions 2a of the tube 2 increases, the number of cutting and bonding steps of the tube 2 increases accordingly. Furthermore, since a test is required to confirm whether or not a leak has occurred at the connecting portion, the more connecting portions, the more work in the quality control process and the cost increase.

As described above, when the number of the molded parts 3, 4, 5 provided in the middle of the blood circuit 1 is large, the problems of quality and manufacturing cost are increased. The present invention has been made by paying attention to the problems that the above-described conventional technology has, and it is possible to easily install a blood circuit part in the middle of the tube by cutting and connecting the tube as much as possible. An object of the present invention is to provide a blood circuit and a blood circuit component that can smooth the flow of blood and improve the quality, simplify assembly, and significantly reduce the manufacturing cost.

[0011]

The present invention has been made as a result of intensive studies to solve the above-mentioned problems, and the gist of the present invention lies in the following items.

(1) In order to inject a predetermined liquid into the tube (20) in the middle of a tube (20) in which blood circulates in a blood circuit (10) used for guiding and circulating blood in the living body outside the body A blood circuit (10) having a mixed injection button (30) attached thereto, wherein the mixed injection button (30) is attached to an outer peripheral surface of the tube (20) in close contact with the attachment body (31, 36, 37), and an accommodating part (32) having an opening in the mounting body (31, 36, 37) is formed, and an elastic body (33) into which a needle for injecting a predetermined liquid can be pierced into the accommodating part (32). ) To the tube (20)
A blood circuit (10) characterized by being fitted so as to be in close contact with the outer peripheral surface.

2. The mounting body (31, 36, 37) of the mixed injection button (30) is formed into a tubular shape that is tightly fixed to the outer peripheral surface of the tube (20) over the entire circumference thereof, and the mounting is performed. In order to expand the main body (31, 36, 37) and fit it on the tube (20), the mounting main body (3
The blood circuit (10) according to claim 1, wherein the blood circuit (10) is notched in the longitudinal direction.

3 The mixed injection button (30) described in item 1 or 2.

4. In the blood circuit (10) used for guiding and circulating blood in the living body outside the body, a roller-type blood pump (60) is provided at an intermediate dividing point of a tube (20) through which blood circulates. In the blood circuit (10), the connection points of the tube (20) and both ends of the roller-type blood pump (60) are communicably connected via joint members (50), respectively. A branch pipe part (53) for connecting another line tube (13, 14) for feeding a predetermined liquid into the tube (20) is integrally formed with at least one of the joint members (50). A characteristic blood circuit (10).

A joint member (50) integrally formed with the branch pipe portion (53) described in item 54.

6 In order to inject a predetermined liquid into the tube (20) in the middle of the tube (20) in which blood circulates in the blood circuit (10) used for guiding and circulating blood in the living body outside the body Is a blood circuit (10) in which a roller type blood pump (60) is interposed in the tube (20) in the middle of the tube (20), and the mixed injection button (30) is , A mounting body (31, 36, 37) which is tightly attached and fixed to the outer peripheral surface of the tube (20), and the mounting body (3)
1, 36, 37) to form a storage portion (32) opening,
An elastic body (33) capable of being pierced by a needle for injecting a predetermined liquid is fitted into the housing portion (32) so as to be in close contact with the outer peripheral surface of the tube (20). The connection points with both ends of the blood pump (60) are communicably connected to each other via joint members (50), and at least one of the joint members (50) has a predetermined size in the tube (20). A blood circuit (1) characterized in that a branch pipe portion (53) for connecting separate line tubes (13, 14) for feeding a liquid is integrally molded.
0).

[0018]

In the blood circuit (10) according to the present invention, the tube (2) is provided in the middle of the tube (20) in which blood circulates.
In order to attach the mixed injection button (30) for injecting a predetermined liquid into 0), the attachment body (31, 36, 3) of the mixed injection button (30) can be used without cutting the tube (20) in the middle.
7) may be fixed by closely contacting the outer peripheral surface of the tube (20).

An elastic body (33) into which a needle for injecting a predetermined liquid can be pierced is fitted into a storage portion (32) formed in the mounting body (31, 36, 37), and the elastic body ( 33)
Closely contacts the outer peripheral surface of the tube (20). Therefore, when the needle is pierced into the elastic body (33) after the mixed injection button (30) is attached and the tube (20) is pierced and inserted into the tube (20), blood leakage or air leakage is caused at the puncture site. There is no risk of suction.

As described above, according to the mixed injection button (30), it is possible to externally attach the tube (20) to the middle of the tube (20) without cutting the tube (20). In addition, the mixed body (31, 31) of the mixed injection button (30)
36, 37) is molded into a tubular shape in which the outer peripheral surface of the tube (20) is tightly fixed over the entire circumference, and the mounting body (31, 36, 37) is expanded to open the tube (20).
If the mounting body (31, 36, 37) is cut out in the longitudinal direction so as to be fitted to the outside, the mixed injection button (30).
Can be easily and surely attached to the tube (20).

Further, in the blood circuit (10) according to the present invention, in order to insert the roller type blood pump (60) at the dividing point of the tube (20), the tube (20) and the roller type blood pump (60) are provided. ) Are connected to both ends via joint members (50). Here, at least one of the joint members (50) is connected to another line tube (13, 14) for feeding a predetermined liquid such as infusion into the tube (20), and a branch pipe portion (53). Is integrally molded.

As a result, in the prior art, the T-shaped tube, which is constructed separately from the joint member (50) and is attached to the cutting point in the middle of the tube, becomes unnecessary, and the number of parts can be reduced, and the tube (20) can be reduced. It is possible to reduce the number of disconnection and connection points.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of the present invention. The blood circuit 10 according to the present embodiment is used to guide blood in the living body to the outside of the body and circulate it. For example, the blood circuit 10 connects a dialyzer (hemodialyzer) and the human body. Such a blood circuit 10 for hemodialysis is generally divided into an arterial circuit 10A shown in FIG. 1 and a vein circuit 10B shown in FIG. 5 to form a pair.

As shown in FIG. 1, the arterial circuit 10A is
Various tubes for blood circuits such as a mixed injection button 30, a pump segment 40, and a joint member 50 are provided in the middle of a tube 20 made of a soft plastic typified by vinyl chloride and having a circular tube cross section. Note that connectors 11 and 12 are attached to both ends of the tube 20.

The mixed injection button 30 is a part for injecting a predetermined liquid such as a chemical liquid into the tube 20, and is mainly made of plastic such as acrylic. Figure 2
As shown in (a) and (b), the mixed injection button 30 is attached to the outer peripheral surface of the tube 20 in the middle thereof and fixed to the mounting body 3.
1 to form an accommodating portion 32 that opens into the mounting body 31, and an elastic body 33 into which a needle for injecting a predetermined liquid can be pierced into the accommodating portion 32 so as to be in close contact with the outer peripheral surface of the tube 20. It is inserted.

More specifically, the mounting body 31 of the mixed injection button 30 in this embodiment is formed in a tubular shape that is tightly fixed to the outer peripheral surface of the tube 20 over the entire circumference thereof. Is expanded and externally fitted to the tube 20 for external attachment.

That is, the mounting body 31 is made up of two semi-circular pipe pieces 31a, 31a which are cut out at one place in the longitudinal direction, and each of the semi-circular pipe pieces 31a, 31a can be expanded via a thin skin hinge 31b. Connected to. As shown in FIGS. 3 (a) and 3 (b), the mounting body 31 has an adhesive (so that the two semicircular pipe pieces 31 a, 31 a fit together in a circular shape along the outer peripheral surface at a predetermined position of the tube 20. For example, it is externally attached to the tube 20 by cyclohexane or the like.

The accommodating portion 32 is formed in a cylindrical shape, and is integrally formed so as to open at the substantially center of one semi-circular tube piece 31a. Further, the elastic body 33 is made of the same material as the tube 20, such as vinyl chloride, rubber, or silicone rubber, and has an elasticity that allows a needle for injecting a predetermined liquid to be easily punctured, and that the puncture hole is closed when the needle is pulled out. The material is formed into a button shape, and is generally called simply a button because of its shape. Storage 3
A short cylindrical cap 34 that holds the elastic body 33 is fitted to the tip end side of 2. In addition, mixed injection button 30
Is typically 1 before or after the pump segment 60 described below.
Two or two are provided.

As shown in FIG. 1, a pump segment 60 is provided in the middle of the arterial circuit 10A. The pump segment 60 constitutes a roller type blood pump. In the roller type blood pump, the pump segments 60 are arranged so as to be curved in a circular shape (see FIG. 1).
Then it is still straight. ), While squeezing the pump segment 60 from the inside of the circle with a roller that is rotationally driven by a motor and squeezing it in a certain direction, the blood in the tube 20 is sequentially delivered.

Both ends 60a, 6 of the pump segment 60
0a is connected to the intermediate end 20a of the tube 20 so as to be able to communicate with each other via joint members 50, 50, respectively. As shown in FIG. 4, one end 5 of the joint member 50
1 is formed in a cylindrical shape which is slightly larger than the middle end 20a of the tube 20, and the inner side of the tube 1 is
It is formed into an inner wall shape in which no step is formed on the inner surface of the circuit between the intermediate end 20a. On the other hand, the other end portion 52 of the joint member 50 is formed in a cylindrical shape which is slightly larger than the end portion 60a of the pump segment 60, and the inside thereof is
The inner wall of the pump segment 60 is shaped to have no step between the end 60a of the pump segment 60 and the inner surface of the circuit.

Further, in the middle between the one end 51 and the other end 52 of the joint member 50, another line tube 13 for feeding an infusion solution (for example, physiological saline) into the tube 20, Alternatively, a branch pipe portion 53 for connecting another line tube 14 for feeding an anticoagulant (for example, heparin) is integrally formed. The branch pipe portion 53 communicates with the inside passage that connects the one end portion 51 and the other end portion 52 of the joint member 50. The joint member 50 is made of plastic such as hard vinyl chloride.

As shown in FIG. 5, the vein side circuit 10B is provided with a mixed injection button 30, a drip chamber 70, etc. in the middle of the tube 20, and one end of which is connected to a dialyzer (hemodialyzer) 80. Drip chamber 70
Is for monitoring the internal pressure in the circuit and is connected to a manometer (pressure gauge) 71.

Next, the operation will be described. In the blood circuit 10, the mixed injection button 3 is inserted in the middle of the tube 20 through which blood circulates.
In order to attach 0, the attachment main body 31 of the mixed injection button 30 may be fixed in close contact with the outer peripheral surface of the tube 20 without cutting the tube 20 in the middle. That is, as shown in FIG. 2, each of the semi-circular pipe pieces 31a, 3 of the mounting body 31 is
1a is expanded and put on the tube 20 in front of or behind the pump segment 60. Then, as shown in FIG. 3, the respective semi-circular pipe pieces 31a, 31a are bonded and fixed to the outer periphery of the tube 20 so as to fit in a tubular shape.

As described above, according to the mixed injection button 30, it is possible to easily and surely attach the tube 20 to an intermediate portion of the tube 20 without cutting the tube 20 at all. As shown in FIG. 3 (a), an elastic body 33 into which a needle for injecting a predetermined liquid can be pierced is fitted in a storage portion 32 formed in the mounting body 31, and the elastic body 33 is formed in the tube 20. Close to the outer peripheral surface. Therefore, after the mixed injection button 30 is attached, when the needle is pierced into the elastic body 33 and the tube 20 is penetrated and inserted into the tube 20, there is no risk of blood leakage or suction of air at the punctured portion. The drug solution is generally injected from a needle that punctures the elastic body 33 of the mixed injection button 30.

In order to insert the roller-type blood pump 60 at the dividing point of the tube 20, the intermediate end 20a of the tube 20 and both ends of the roller-type blood pump 60 are connected through the joint members 50, respectively. To do. Here, at least one of the joint members 50 is infused into the tube 20 or an anticoagulant (heparin) is used.
The branch pipe portion 53 for connecting the separate line tubes 13 and 14 for feeding the like is integrally formed.

As a result, in the prior art, the T-shaped tube 4 (see FIG. 8), which is constructed separately from the joint member 50 and is attached to the cutting position in the middle of the tube, becomes unnecessary,
The number of parts in the blood circuit 10 can be reduced, and moreover, the number of cutting and connecting points of the tube 20 can be reduced. In addition, in FIG. 1, a branch pipe portion 53 is integrally formed on both of the joint members 50.

Thus, by using the tube-external mixed injection button 30 and the joint member 50 with the branch pipe portion 53, the adhesive connection point of the tube 20 during the assembly of the blood circuit 10 is the arterial circuit shown in FIG. In case of 10A,
There are only four positions, that is, two positions of the connectors 11 and 12 at both ends of the circuit and two positions of both ends of the pump segment 60.
In the conventional blood circuit 1 shown in (1), there were a total of 12 adhesive connection points, which were greatly reduced.

The divided tube 20 to be used
Even though it was necessary to cut 6 pieces in the past,
As shown in, it is possible to assemble with only two. Thereby,
The cutting and bonding steps of the tube 20 are reduced, and further, the test for confirming whether or not a leak has occurred at the connecting portion is reduced, so that not only the manufacturing work but also the quality control process work can be easily performed with less labor. .

The flow of blood in the blood circuit 10 will be briefly described. First, blood taken out of the body passes through the arterial circuit 10A shown in FIG. 1 to drive the roller type blood pump (pump segment 60). Is sent to the dialyzer (hemodialyzer) 80 shown in FIG. A drug solution is appropriately injected from the mixed injection button 30 on the way, and an infusion solution, an anticoagulant, or the like is appropriately sent from the separate line tubes 13 and 14 connected to the branch pipe portion 53 of the joint member 50. Then, the blood dialyzed by the dialyzer 80 is returned to the body through the vein side circuit 10B shown in FIG.

FIG. 6 shows a second embodiment of the mixed injection button 30. In this embodiment, the mounting body 36 is the tube 20.
The mounting body 36 is formed into a tubular shape that is tightly adhered and fixed to the outer peripheral surface in the middle of the entire circumference, but the mounting main body 36 has two semicircular pipe pieces that are cut away at two locations in the longitudinal direction. It consists of 36a and 36a. The accommodating portion 32 into which the elastic body 33 is fitted is formed in one semi-circular pipe piece 36a. Further, the mixed injection button 30 may be provided only on the side of the semicircular pipe piece 36a on which the storage portion 32 is formed. Semicircular tube piece 36a
Is fixed to the outer peripheral surface of the tube 20 with an adhesive.

As a result, in the present embodiment, the tubes 20 of various diameters can be externally attached in correspondence with each other. It should be noted that the same parts as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 7 shows a third embodiment of the mixed injection button 30. In this embodiment, the mounting body 37 is the tube 20.
Is formed in a C-shaped cross-sectional shape in which the outer peripheral surface in the middle thereof is closely fixed over a part of the entire circumference. That is, the attachment body 37 is provided with the tube insertion portion 37a which is cut out at one place in the longitudinal direction.

In this case, the tube 20 can be inserted from the tube insertion portion 37a of the mounting body 37 in a crushed state and easily and quickly attached to the outside. It should be noted that the same parts as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

The specific configurations of the blood circuit according to the present invention and the mixed injection button and the joint member which are blood circuit components are not limited to the illustrated embodiment.

[0045]

According to the blood circuit and the blood circuit component of the present invention, the mixed injection button can be attached to the middle of the tube without cutting the tube, and the tube and the roller type blood can be attached. Since the branch pipe part that can connect another line tube is integrally molded to the joint member that connects to the pump, the number of adhesive connection points and the number of parts in the circuit are greatly reduced, and as a result, the connection points and their defects result. The risk of blood clots and leaks is reduced and quality can be significantly improved. Furthermore, the manufacturing process of the blood circuit is greatly simplified and the number of inspection points is reduced, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an arterial circuit of a blood circuit according to a first embodiment of the present invention.

FIG. 2 is a structural explanatory view showing a mixed injection button which is a blood circuit component according to the first embodiment of the present invention.

FIG. 3 is an explanatory view showing a mixed injection button which is a blood circuit component according to the first embodiment of the present invention.

FIG. 4 is a front view showing a joint member which is a blood circuit component according to the first embodiment of the present invention.

FIG. 5 is a front view showing a vein side circuit of the blood circuit according to the first example of the present invention.

FIG. 6 is a side view showing a mixed injection button which is a blood circuit component according to a second embodiment of the present invention.

FIG. 7 is a side view showing a mixed injection button which is a blood circuit component according to a third embodiment of the present invention.

FIG. 8 is a front view showing an arterial circuit of a conventional blood circuit.

FIG. 9 is a front view showing a mixed injection button which is a conventional blood circuit component.

FIG. 10 is a front view showing a T-shaped tube which is a conventional blood circuit component.

FIG. 11 is a front view showing a joint member which is a conventional blood circuit component.

[Explanation of symbols]

 10 ... Blood circuit 10A ... Arterial side circuit 10B ... Vein side circuit 13, 14 ... Separate line tube 20 ... Tube 30 ... Mixed injection button 31, 36, 37 ... Mounting body 32 ... Storage part 33 ... Elastic body 50 ... Joint member 53 ... Branch pipe 60 ... Pump segment (roller type blood pump)

Claims (6)

[Claims] 1. A blood circuit used to guide and circulate blood in a living body outside the body, in which a mixed injection button for injecting a predetermined liquid into the tube is attached in the middle of the tube in which the blood circulates. In the circuit, the mixed injection button has a mounting body that is fixed in close contact with an outer peripheral surface in the middle of the tube, forms a storage section that opens into the mounting body, and injects a predetermined liquid into the storage section. A blood circuit in which an elastic body capable of being punctured by a needle is fitted so as to be in close contact with the outer peripheral surface of the tube. 2. A mixed injection button mounting body is formed into a tubular shape that is tightly fixed to the outer peripheral surface of the tube along the entire circumference thereof, and the mounting body is expanded and fitted onto the tube. The blood circuit according to claim 1, wherein the mounting body is cut out in the longitudinal direction. 3. The mixed injection button according to claim 1 or 2. 4. A blood circuit used for guiding and circulating blood in a living body outside the body, wherein a blood circuit is formed by interposing a roller type blood pump at an intermediate cut point of a tube through which blood circulates. Connection points between the tube and both ends of the roller-type blood pump are connected so as to be communicable with each other through joint members, and at least one of the joint members is used for feeding a predetermined liquid into the tube. A blood circuit characterized by integrally molding a branch pipe portion for connecting another line tube of the above. 5. A joint member integrally formed with the branch pipe portion according to claim 4. 6. A blood circuit used for guiding and circulating blood in a living body outside the body, with a mixed injection button for injecting a predetermined liquid into the tube in the middle of the tube through which the blood circulates. A blood circuit formed by interposing a roller-type blood pump at a dividing point in the middle of the tube, wherein the mixed injection button has an attachment body fixed to the outer peripheral surface of the tube in close contact with the attachment body. An elastic body into which a needle for injecting a predetermined liquid is pierced is formed so as to be in close contact with the outer peripheral surface of the tube, and the both ends of the tube and the roller-type blood pump are formed. The connection points with the side are connected so as to be able to communicate with each other through joint members, and at least one of the joint members is provided with a separate line for feeding a predetermined liquid into the tube. Blood circuit, characterized in that integrally formed branch pipe portion for connecting the tubes.