JP2002210022A - Medical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical instrument not troubled by the adjustment or the like of the coating amount of a solvent and capable of certainly connecting a tube and a connection pipe without using the solvent. SOLUTION: In the medical instrument wherein the tube 11 and the connection pipe 21 having a groove part 25 formed thereto are connected, an outer cylinder-shaped folded-back part 14 is formed to the leading end of the tube 11 and the outer periphery of the folded-back part 14 is mounted in the groove part 25 of the connection pipe 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical device having a tube as a component, and more particularly to an invention of a connection form between these tubes and a connecting tube constituting the medical device. The medical device of the present invention includes medical devices such as a blood circuit, a blood transfusion / infusion set, an infusion bag, and a blood bag. More specifically, in the present invention, a connection pipe such as a branch portion (for example, a Y-shaped pipe or a T-shaped pipe) is provided in the middle of the main tube, and a branch line tube (for injecting a chemical solution into the main tube, A medical device to which a pressure monitor is connected) or a plug inserted into the branch portion to inject a drug solution into the main tube, sample a liquid from the main tube, monitor the pressure in the main tube, and the like. Processing unit (for example, co-injection unit, liquid sampling unit, pressure monitor unit)
Medical devices formed with, for example, body fluid processing circuits, transfusions, blood collection, blood transfusion sets, and the tubes and connection tubes such as transfusions, blood collections, blood transfusion bags, etc. used together or alone with these sets and circuits The present invention relates to a medical device having:

[0002]

2. Description of the Related Art Hereinafter, an example of a body fluid processing circuit in which a processing section such as a branch line tube or a co-injection section is welded in the middle of a synthetic resin main tube constituting a body fluid processing circuit. Will be described in detail. It is well known that an artificial kidney, an artificial lung, a plasma separation device, and other body fluid processing devices are provided with a body fluid processing circuit for connecting the human body to these devices. FIG. 4 is a cross-sectional view showing an example of the vicinity of the co-injection part of the arterial blood circuit connected to the artificial kidney. Conventionally, when assembling the co-injection unit 103, the tube body 101 is cut in place, and then the solvent 105 is applied to the tip of each tube body 101, and the solvent 105 is pushed into the connection pipe 107 with a finger.
Next, a rubber plug 108 is inserted so as to seal the opening 106 of the connection pipe 107, and a cover 109 is placed over the rubber plug 108.

[0003] The means for connecting the tube and the connecting pipe using a solvent as described above makes it difficult to adjust the amount of the solvent applied, and requires considerable skill. That is, if the coating amount of the solvent is too large, the solvent protrudes from the joint portion toward the inner surface of the tube,
This solidifies to form a lump 110 as shown in FIG. When such a lump 110 is formed, the frictional resistance of blood flowing inside the tube main body increases, and turbulence occurs in the flow of blood flowing as a laminar flow in a normal smooth conduit. This results in the destruction of blood components and the resulting blood coagulation.

On the other hand, if the amount of the solvent is too small, not only the adhesion between the tube body 101 and the connecting tube 107 will be insufficient, but also a gap may be formed between them and blood may leak therefrom. . Furthermore, such a method of applying and connecting a solvent involves a risk of contamination by bacteria and a risk that the solvent may dissolve in blood and enter the human body, thus adversely affecting the human body. In addition, due to the distortion of the cut surface of the tube main body 101, incompatibility between the tube main body 101 and the connection pipe 107 and the root of the solvent adhere to each other, and unevenness is formed, which causes blood coagulation and the like. The inventor of the present invention has made intensive studies in order to solve the above-mentioned problems, and as a result, has arrived at the following invention.

[0005]

Means for Solving the Problems [1] The present invention relates to a medical device in which a tube 11 is connected to a connection tube 21 having a groove 25 formed therein. 14 is provided, and the medical device 1 in which the outer periphery of the folded portion 14 is attached to the groove 25 of the connection tube 21 is provided. [2] The present invention relates to a medical device in which the tube 11 is connected to the connection tube 21 having the groove 25 formed therein. The tube 11 has an outer cylindrical folded portion 14 formed at the tip thereof. Is attached to the groove 25 of the connecting pipe 21 and the medical device 1A in which the caulking ring 31 is press-fitted into the space between the front part of the tube 11 and the folded part 14.
I will provide a. [3] The present invention is a medical device in which the tube 11 is connected to the connection tube 21 having the groove 25 formed therein. The outer periphery of the folded portion 14 is attached to the groove 25 of the connection pipe 21, and a caulking ring 31 </ b> A in which an outer cylinder 34 having an undercut 36 is protruded is inserted into a space between the tip of the tube 11 and the folded portion 14. The provided medical device 1B is provided. [4] The present invention provides a tube 11 and an undercut 26
A medical device to which a connection tube 21A having a groove 25 having a groove is formed, wherein an outer cylindrical folded portion 14 is formed at the tip of the tube 11, and an outer periphery of the folded portion 14 is formed in the groove of the connection tube 21A. 25 and the tube 11
And a medical device 1C in which a caulking ring 31B is press-fitted in a space between the folded portion 14 and the groove 25. [5] The present invention relates to a medical device in which tubes 11A and 11B are connected to a connecting tube 21A having a groove 25 having an undercut 26.
B, flange-shaped folded portions 15 and 16 are formed at the front end, and the folded portions 15 and 16 are mounted in the groove 25 of the connection pipe 21A, and the front portions of the tubes 11A and 11B and the folded portions 15 and 16 are formed. The medical device 1D in which the caulking ring 31 is press-fitted is provided in a space between the groove and the groove 25. [6] The present invention provides tubes 11A and 11B and a groove 25
A medical device to which a connecting tube 21 formed with a flange is connected, wherein flanges 15 and 16 are formed at the tips of the tubes 11A and 11B, and the folded portions 15 and 16 are connected to the grooves 25 of the connecting tube 21. To the tubes 11A, 1
1B, the folded portions 15, 16 and the groove 2
Outer cylinder 34 having an undercut 36 in the space between
Tool 1E press-fitted with caulking ring 31A
I will provide a. [7] The present invention provides the medical device 1 according to any one of [1] to [6].
A to 1E, the outer cylinder 3 of the caulking ring 31A
4 and the undercuts 26 and 36 are formed in the groove 25 of the connection pipe 21A.
Instead of connecting the connection pipes 21 and 21A to the connection pipes 1 and 11A and 11B, projections and grooves are formed on opposing wall surfaces of the caulking rings 31, 31A and 31B and the connection pipes 21 and 21A, and these are not engaged or disengaged. Fitted and connected or the respective opposed projections and grooves are formed in a screw shape,
These are screwed together to connect the medical devices 1, 1A, 1B, 1A with the tubes 11, 11A, 11B connected to the connecting tubes 21, 21A.
C, 1D and 1E are provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The medical device 1, 1A, 1
B, 1C, 1D, and 1E are tubes 11 and 11A and connecting tubes 21 and 21 each having a groove 25 as shown below.
A is connected (attached). In the present invention, the tubes 11, 11A (hereinafter, tube 11 and the like) and the connection tubes 21, 21A (hereinafter, connection tube 21 and the like) are "connected (mounted)".
Then, A machining, B adhesive, C insert molding, or the like can be adopted depending on the constituent materials and connection forms of both the tube 11 and the like and the connection pipe 21 and the like. For example, a solvent bonding (for example, used for connection between polyvinyl chlorides)
B, high frequency welding (for example, used for connection between polyvinyl chloride and ethylene-vinyl acetate copolymer), c heat welding (for example, used for connection between polyethylene and polypropylene), d ultrasonic welding ( For example, used for connection between polyethylene and polypropylene)
e Adhesion with UV curing agent
A means for applying between the first and the like and the connecting pipe 21 and irradiating and curing the ultraviolet rays, and f-fitting (the swaging rings 31, 31A and 31B between the tube 11 and the connecting pipe 21 and the like)
(Hereinafter, means for press-fitting a caulking ring 31 and the like, means for covering the outer circumference of the tube 31 and the connecting pipe 21 with a large-diameter tube or a shrinking tube, and the like are included. In addition, caulking ring 3
Undercuts 26, 36 on 1st grade or connecting pipe 21 etc.
The connection pipe 21 or the caulking ring 31 or the like may be fixed by forming a protrusion (hereinafter also referred to as an undercut 36), or the projection and the groove facing the caulking ring 31 or the connection pipe 21 or the like. May be formed and fixed by engaging or fitting them. Further, the projection and the groove facing each other may be formed in a screw shape, and screwed and fixed. ), G-engagement (both of the tube 11 etc. and the connecting tube 21 etc. are formed with irregularities which engage each other, and means for engaging these, or gel can be inserted between the concave and convex if necessary. ), H laser beam, i-contact type adhesion (for example, used for connection between polyethylene and polypropylene) and the like, or a combination of these respective connection means. A machining refers to b high frequency welding, c heat welding, d
These are ultrasonic welding, f-fitting, g-engagement, and h-laser beam. The B adhesive is adhesion by the e ultraviolet curing agent and i-contact adhesion. In the C insert molding, the tube 11 and the like are arranged in a mold, and the outer periphery thereof is connected to the connecting pipe 2.
This is a means for coating with a component such as 1. Tube 1
In the case where the constituent materials of both 1 and the like and the connecting pipe 21 and the like are polyvinyl chloride (including chlorinated polyethylene) (a part of the connecting layer may be made of these materials), the above-mentioned b high frequency welding, e Adhesion with an ultraviolet curing agent, f-fitting, g-engagement, or the like, or a combination of these connection means can be employed. In addition, the constituent materials of both the tube 11 and the like and the connecting tube 21 and the like are other than the above-mentioned polyvinyl chloride-based materials such as polyolefin-based materials (polyethylene-based, polypropylene-based or copolymers containing a monomer copolymerizable therewith).
In the case of (a part of the connection layer may be made of these materials), c heat welding, d ultrasonic welding, adhesion with e ultraviolet curing agent, f crimping fitting, g engagement, i close adhesion bonding or A combination of these connection means can be adopted.

When the constituent material used for the tube 11 or the like of the present invention is polyvinyl chloride, the constituent material of the “tube 11 or the like” contains a large amount of the plasticizer (more than 30% by mass and 8%).
(Less than 0% by mass) soft (or also flexible) polyvinyl chloride is used. When a material other than polyvinyl chloride, for example, a polyolefin material is used, in the case of a single substance (for example, polyethylene), the physical property (density) of the material is selected and, for example, the material such as the tube 11 or the like is soft (or flexible). Low density polyethylene (density;
0.910 or less). In the case of two or more substances (for example, a copolymer of ethylene and vinyl acetate, and a random copolymer of ethylene and methyl acrylate), the degree of crystallization (degree of polymerization) of the material is selected and, for example, the tube 11 or the like is selected. A soft (or flexible) copolymer of ethylene and vinyl acetate (methyl acrylate) having low crystallinity (low polymerization degree) can be used. Normally, ethylene alone has high crystallinity, and the one crystallized regularly has a high hardness. However, as a monomer (vinyl acetate, methyl acrylate) copolymerizable with ethylene is added and the amount of addition (degree of polymerization) is increased, the growth of ethylene crystals is inhibited, so that the hardness of the entire polymer is softened. Low crystallinity (low polymerization degree) in tube 11 etc.
A soft (or flexible) copolymer of ethylene and vinyl acetate (methyl acrylate) can be used.

Next, an embodiment of a connection form between the tube and the connection pipe of the medical device of the present invention will be described. FIG. 1 is a schematic view showing an example of processing the distal end of a tube with a folded portion constituting the medical device of the present invention. As shown in FIG.
The folded portions 14, 15, 16 are formed at the tips of A, 11B, and can be connected to the connection pipe 21 in which the groove 25 is formed. For example, as shown in FIG. 1A, the outer cylindrical folded portion 14 can be formed while the distal end of the tube 11 is in contact with a heating mold (not shown) or the like to be heated and softened. For example, as shown in FIG. 1B and FIG.
The flanges 15 and 16 can be formed while the tips of 1A and 11B are in contact with a heating mold or the like to soften by heating. 1b is formed in a single flange, whereas the folded portion 16 in FIG. 1c is formed in a double flange.

For example, as in the medical device 1 shown in FIG. 2A, the outer periphery of the folded portion 14 of the tube 11 is connected to the connecting tube 2.
1 can be mounted in the groove 25. In this embodiment, when the constituent materials of both the tube 11 and the connection tube 21 are the above-mentioned polyvinyl chloride, it is possible to perform b-high frequency welding and e-adhesion with an ultraviolet curing agent. When the constituent materials of both the tube 11 and the connection tube 21 are the polyolefin-based materials, it is possible to use c heat welding, d ultrasonic welding, and e adhesion using an ultraviolet curing agent.

As shown in FIG. 2B, the outer periphery of the folded portion 14 of the tube 11 is connected to the connecting tube 2A.
1 in the groove 25, and a caulking ring 31 is provided in a space between the front portion of the tube 11 and the folded portion 14.
(The flange portion 33 is formed at the end of the body portion 32) to press the folded portion 14 to the caulking ring 31.
Of the tube 11
And the connection pipe 21 can be mounted. In this embodiment,
When the constituent material of both the tube 11 and the connection tube 21 is the above-mentioned polyvinyl chloride-based material, b high frequency welding and e adhesion with an ultraviolet curing agent can be used together. When the constituent material of both the tube 11 and the connection tube 21 is the polyolefin-based material, c-heat welding, d-ultrasonic welding, and e-adhesion with an ultraviolet curing agent can be used in combination.

As shown in FIG. 3, the tubes 11, 11A,
The folded portions 14, 15, 16 of 11 </ b> B are formed by using a caulking ring 31 </ b> A (a flange 33 is formed at the end of the body 32, and an outer cylinder 34 is formed at the flange 33). When connecting to the connecting pipes 21 and 21A in which the grooves 25 are formed, an undercut (or a protrusion or a protrusion) is formed on either the inner circumference of the outer cylinder 34 of the caulking ring 31A or the grooves 25 of the connecting pipes 21 and 21A. ) 26, 36 are formed, and the tubes 11, 11A, 11B and the connecting tube 21,
21A can be connected. For example, as in the case of the medical device 1B (FIG. 3A), the outer periphery of the folded portion 14 of the tube 11 is mounted on the groove 25 of the connection tube 21, and is inserted into the space between the front of the tube 11 and the folded portion 14. , A body portion 32 of a caulking ring 31A having an outer cylinder 34 having an undercut 36 is press-fitted, and between the outer cylinder 34 and the body portion 32, the folded portion 14 and the connection pipe 21 are inserted.
, The tube 11 and the connection tube 21 can be mounted. The outer circumference of the connection pipe 21 is undercut 3
6 firmly fixed. In this embodiment, the tube 1
When the constituent material of both 1 and the connection pipe 21 is the polyvinyl chloride-based material, b high frequency welding and e adhesion with an ultraviolet curing agent can be used together. Also, the tube 11 and the connecting pipe 21
When both of the constituent materials are the above-mentioned polyolefin-based materials, c-heat welding, d-ultrasonic welding, and e-adhesion with an ultraviolet curing agent can be used in combination.

An undercut 26 is formed in the groove 25 of the connecting tube 21A as in the medical device 1C shown in FIG. 3B, and the outer periphery of the folded portion 14 of the tube 11 is attached to the groove 25 of the connecting tube 21A. In the space between the front part of the tube 11, the folded part 14, and the groove 25,
A caulking ring 31B (having a flange portion 33 at one end of the body portion 32 and a groove portion 35 at the other end) is press-fitted, and the folded portion 14 is sandwiched between the connecting tube 21A and the caulking ring 31B. Thus, the connection pipe 21A and the tube 11 can be mounted. Body 32 of caulking ring 31B
Is firmly fixed by an undercut 36.
In the present embodiment, when the constituent materials of both the tube 11 and the connection tube 21A are the above-mentioned polyvinyl chloride type, b high frequency welding,
e Adhesion with an ultraviolet curing agent can be used in combination. Further, when the constituent materials of both the tube 11 and the connecting tube 21A are the polyolefin-based materials, c heat welding, d ultrasonic welding, e
Adhesion with an ultraviolet curing agent can be used together.

An undercut 26 is formed in the groove 25 of the connecting tube 21A as in the medical device 1D shown in FIG. 3C, and the flange-shaped folded portions 15, 16 of the tubes 11A, 11B are connected to the groove 25. The swaging ring 31 is pressed into the space between the front portions of the tubes 11A, 11B and the folded portions 15, 16 and the groove 25, and the swaged portion is inserted between the swaged ring 31 and the connection pipe 21A. Tubes 11A, 11B
And the connection pipe 21A. The outer periphery of the body 32 of the caulking ring 31 is firmly fixed by the undercut 26. In this embodiment, the tubes 11A, 11B
When both the constituent materials of the connection pipe 21A and the connection pipe 21A are the above-mentioned polyvinyl chloride-based materials, b high frequency welding and e adhesion with an ultraviolet curing agent can be used together. When the constituent materials of both the tubes 11A and 11B and the connection tube 21A are the polyolefin-based materials, c heat welding, d ultrasonic welding, and e bonding with an ultraviolet curing agent can be used in combination.

Also, as in the medical device 1E (FIG. 3d),
The collar-shaped folded portion 1 of the tubes 11A and 11B
5 and 16 are attached to the groove 25 of the connection pipe 21, and the front parts of the tubes 11 A and 11 B and the folded part 15,
In the space between the groove 16 and the groove 25, an undercut 36
Ring 31A having an outer cylinder 34 formed with a flange (a flange 33 is formed at the end of the body 32, and the outer cylinder 3 is further formed on the flange 33).
4) is press-fitted, the tubes 11A, 11B can be attached to the connecting tubes 21 with the folded portions 15, 16 sandwiched between the caulking ring 31A and the connecting tubes 21. The outer circumference of the connection pipe 21 is an undercut 3 of the outer cylinder 34.
6 firmly fixed. In this embodiment, the tube 1
When the constituent materials of both 1A and 11B and the connecting pipe 21 are the above-mentioned polyvinyl chloride type, b high frequency welding and e adhesion with an ultraviolet curing agent can be used together. Tube 11
When the constituent materials of both A and 11B and the connection pipe 21 are the polyolefin-based materials, it is possible to use together c heat welding, d ultrasonic welding, and e-adhesion with an ultraviolet curing agent.

Further, in the present invention, as described above, the undercuts (also referred to as protrusions or protrusions) 26, 36 are formed on either the inner periphery of the outer cylinder 34 of the caulking ring 31A or the groove 25 of the connection pipe 21A. Forming the tubes 11, 1
1A, 11B and connecting pipes 21, 21A ”instead of the caulking rings 31, 31A and the connecting pipe 21,
The opposing wall surfaces of 21A (the caulking ring 31, the body 32 and the outer cylinder 34, and the connecting pipe 31 the body 32
And the groove 25 in contact with the outer cylinder 34 and the outer periphery), a projection and a groove may be formed, and these may be engaged or fitted to be connected. Or the protrusions and grooves facing each other are formed in a screw shape,
These may be screwed together to connect the tubes 11, 11A, 11B to the connecting tubes 21, 21A.

[0016]

As described above, according to the present invention, the tube and the connecting pipe can be securely connected without using a solvent. For this reason, there is no need to bother with adjusting the amount of solvent to be applied as in the related art. That is, due to the excessive amount of the solvent applied, the frictional resistance of the liquid (blood) increases due to the solvent protruding into the inner surface of the tube, and the destruction of blood components and blood induced by the change of the flow of the liquid (blood) into turbulent flow. Problems such as solidification can be solved. Further, when the amount of the applied solvent is too small, problems such as leakage of blood from a gap between the tube and the connection tube due to poor adhesion between the tube and the connection tube can be solved. Furthermore, the danger of bacterial contamination due to the application of the solvent and the concern that the solvent dissolves in the blood and enters the human body to adversely affect the human body can be eliminated.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of processing a distal end of a tube with a folded portion constituting a medical device of the present invention.

FIG. 2 is a schematic view showing an example of a connection form between a tube with a folded portion and a connection tube which constitute the medical device of the present invention.

FIG. 3 is a schematic view showing an example of a connection form between a tube with a folded portion and a connection tube which constitute the medical device of the present invention.

FIG. 4 is a schematic view showing an example of a connection form between a tube and a connection tube constituting a conventional medical device.

[Explanation of symbols]

1, 1A, 1B, 1C, 1D, 1E Medical tool 11, 11A, 11B Tube with folded part (tube) 14 Folded part (outer cylinder) 15 Folded part (flange) 16 Folded part (double flange) 21, 21A Connection Tube 25 Groove 26 Undercut (projection, projection) 31, 31A, 31B Caulking ring 32 Body 33 Flange 34 Outer cylinder 35 Groove 36 Undercut (convex, projection)

Claims (7)

[Claims] 1. A medical device comprising a tube 11 and a connecting tube 21 having a groove 25 formed therein. The tube 11 has an outer cylindrical folded portion 14 formed at the tip thereof, and an outer periphery of the folded portion 14. Is mounted in the groove 25 of the connection pipe 21. 2. A medical device comprising a tube 11 and a connecting tube 21 having a groove 25 formed therein, wherein the tube 11 has an outer cylindrical folded portion 14 formed at an end thereof, and an outer periphery of the folded portion 14. Is attached to the groove 25 of the connection pipe 21, and a caulking ring 31 is press-fitted into a space between a front part of the tube 11 and the folded part 14. 3. A medical device in which a tube 11 and a connecting tube 21 having a groove 25 formed therein are connected to each other, wherein an outer cylindrical folded portion 14 is formed at an end of the tube 11 with a reinforcing member, and the folded portion is formed. 14 is mounted in the groove 25 of the connection pipe 21, and an undercut 3 is formed in a space between the tip of the tube 11 and the folded part 14.
6. A medical tool 1B, characterized by press-fitting a swaging ring 31A provided with an outer cylinder 34 having a protrusion 6. 4. A medical device in which a tube 11 and a connecting tube 21A having a groove 25 having an undercut 26 are connected thereto, wherein an outer cylindrical folded portion 14 is formed at the tip of the tube 11. The outer periphery of the folded portion 14 is attached to the groove 25 of the connecting pipe 21A, and a caulking ring 31B is press-fitted into a space between the front portion of the tube 11 and the folded portion 14 and the groove 25. Medical tool 1C. 5. A medical device in which tubes 11A and 11B are connected to a connecting tube 21A having a groove 25 having an undercut 26. The tubes 11A and 11B have flange-shaped folded portions 15 and 16 at their ends. And forming the folded portions 15 and 16 into the groove portions 25 of the connection pipe 21A.
A medical device 1D, wherein a caulking ring 31 is press-fitted into a space between the front portions of the tubes 11A, 11B, the folded portions 15, 16 and the groove 25. 6. A medical device in which tubes 11A and 11B are connected to a connecting tube 21 having a groove 25, wherein flanges 15 and 16 are formed at the ends of the tubes 11A and 11B. An outer cylinder 34 having an undercut 36 in a space between the front portions of the tubes 11A and 11B and the folded portions 15 and 16 and the groove 25. Caulking ring 31A
A medical device 1E, wherein the medical device 1E is press-fitted. 7. The medical device 1 according to claim 1, wherein:
A to 1E, the outer cylinder 3 of the caulking ring 31A
4 and the undercuts 26 and 36 are formed either in the groove 25 of the connecting pipe 21A or in the tube 1A.
Instead of connecting the connection pipes 21 and 21A to the connection pipes 1, 11A and 11B, the caulking rings 31, 31A and 31B and the connection pipe 2
A projection and a groove are formed on the opposed wall surfaces of the first and the first 21A, and these are engaged or fitted to be connected to each other, or the opposed projection and the groove are formed in a screw shape, and these are screwed together to form a tube. 11, 11A, 11B and connecting pipe 2
1, 21A connected, medical device 1, characterized in that
1A, 1B, 1C, 1D, 1E.