JPH0626283Y2 - Branch of extracorporeal circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a branch portion of an extracorporeal circulation circuit, and to an improvement of a branch portion assembled without cutting a tube body.

[Problems to be Solved by Conventional Techniques and Inventions] An artificial kidney, an artificial liver, a plasma separation device, and other body fluid treatment devices are not provided with an extracorporeal circulation circuit for connecting the human body and these devices. well known.

FIG. 7 shows an example of an arterial blood circuit connected to an artificial kidney. As shown in FIG. 7, the tube body 21 of such an extracorporeal circulation circuit usually has an air line 22 and a branching portion. 23, a large number of heparin lines 24 and the like are provided. However, the manufacturing process of such a branched portion has conventionally been extremely troublesome and requires considerable skill.

For example, FIG. 8 is a cross-sectional view of the mixed injection part. As shown in FIG. 9 in assembling such a branch part 23 in the related art, after cutting the tube 21 at a proper position, the tip end part of each tube body 21 is cut. The solvent 25 is applied to the above, and this is pushed into the connecting pipe 27 with a finger, then a rubber stopper 28 is inserted so as to seal the opening 26 of the connecting pipe 27, and a cover 29 is put on the upper portion of the rubber stopper 28. Is what you are doing.

However, according to such a method, (a) the tube body 21 must be formed to have an accurate diameter so that the tube body 21 and the connecting pipe 27 fit together, and the tube body 21 should be cut to a predetermined length more accurately. Since it has to be done, many manufacturing processes are required, and it takes time and labor. (B) Due to the distortion of the cut surface of the tube body 21, incompatibility between the tube body 21 and the connecting tube 7 and the solvent adhesion root 30 are generated, and unevenness is formed to form blood. (C) The high pressure steam sterilization after assembly causes the connecting part of the tube body 21 and the connecting pipe 27 to contract inward, and only that part has a slightly smaller diameter or a step. It has been pointed out that there are disadvantages such as disturbance of blood flow, blood coagulation, residual blood, and hemolysis, and (d) a large number of parts and complicated parts management.

In addition, the actual development number 59-135 and the actual development number 62-1700
No. 48 is a connecting pipe having a C-shaped cross section for mounting a tube forming a flow circuit and a connecting pipe consisting of two sleeves divided into two, and the end portion of the cutting portion of the sleeve is a strip. There is disclosed a mixed injection sampling port in which a hook and a hook, a tack and a tack hole are formed at the open end of the sleeve, and a concave groove is formed on the inner surface of the sleeve.

However, (e) when a hook and a hook, a tack and a tack hole are formed at the open end of the sleeve and these are hooked,
Although it is easy to install and remove from the tube, if there are errors in the dimensions of each part, it is difficult to secure sufficient connection strength between the parts and the tube, and the parts loosen during use and the work is interrupted. It is assumed that this will cause (F) When the adhesive is applied to the outer peripheral surface of the tube or the inner surface of the bonding tube for bonding, the adhesive leaks to the outside of the part or is leached and solidified on the contact surface of the rubber stopper with the part and the injection needle cannot be inserted. An unexpected situation such as

In order to solve the above problems, the inventor of the present invention has earnestly studied and, as a result, has arrived at the next device.

[Means for Solving the Problems] The present invention is (A) a branching part installed in the middle of an extracorporeal circulation circuit, and (B) an insertion tube of a joining member is integrally formed on the ceiling and a tube is formed inside. (D) The upper part having the mounting groove formed on the bottom and the flange formed on the bottom, and the lower part having the flange formed on the top surface and having the tube mounting groove formed therein. A fitting protrusion (or a fitting groove) and a fitting groove (or a fitting protrusion) are formed on the end faces of the flanges of the upper part and the lower part that face each other, and (E) the tube is attached to the upper part. And (F) providing a branch part of an extracorporeal circulation circuit in which end faces of the flange parts of the upper part and the lower part which are opposed to each other are welded by high frequency or ultrasonic waves. .

[Embodiment] FIG. 1 is a schematic view of a branch portion 1 of an extracorporeal circulation circuit of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

The present invention is made of a hard synthetic resin such as polycarbonate, polypropylene, and hard polyvinyl chloride, and is composed of an upper part 2 and a lower part 3.

An insertion tube 4 for joining members such as a mixed injection rubber button, a chemical injection tube, and a heparin injection line is integrally formed on the ceiling of the upper part 2, and a tube mounting groove 5 is formed inside.
Are formed. Further, a collar portion 12 is formed on the bottom portion. The insertion tube 4 and the mounting groove 5 are communicated with each other through the opening 7. On the other hand, on the top surface of the lower part 3, a flange portion 13 that faces the flange portion 12 of the upper part 2 is formed, and a tube mounting groove 6 that faces the tube mounting groove 5 is formed inside. Reference numerals 8 and 9 denote end faces of the upper part 2 and the lower part 3. For example, as shown in FIG. 3, a fitting groove 10 is formed on the flange portion 12 on the end surfaces 8 and 9, and a fitting protrusion portion 11 is formed on the flange portion 13. Are formed. (Note that the positions of the fitting groove 10 and the fitting protrusion 11 can be reversed).

The tube 15 constituting the extracorporeal circulation circuit is mounted between the upper part 2 and the lower part 3 as shown in FIG.

For example, use the tube 15 for the tube mounting groove 6 of the lower part 3.
And then align the mounting groove 5 of the upper part 2 with the tube 15 mounted on the lower part 3,
Attach to the surface.

The upper part 2 and the lower part 3 are joined by fusing by high frequency or welding while applying vibration by ultrasonic waves in a state where the end faces 8, 9 of the flanges 12, 13 are in close contact with each other. Since the contact area between the end faces 8 and 9 of the flanges 12 and 13 is increased by the amount of the fitting protrusion 11 and the fitting groove 10 formed on the end faces 8 and 9, it is possible to increase the fusion area of both. Therefore, the tube 15 can be fixed more firmly than the upper part 3.

Finally, connecting members such as a mixed injection rubber button, a liquid injection line, and a heparin injection line are attached to the insertion tube 4.

FIG. 5 shows a schematic view of the mixed injection rubber button 16 attached to the insertion tube 4, and further the mixed injection rubber button 16 and the mixed injection cover 17 capped on the insertion tube 4.

FIG. 6 shows another embodiment of the mixed injection rubber button 16 attached to the insertion tube 4. The mixed injection rubber button 16 is enclosed in the housing 18 and the protruding portion 18 of the housing 18 is shown.
After bending a by ultrasonic waves to the mixed injection rubber button side (inside) and caulking the mixed injection rubber button 16, insert it into the insertion tube 4
It is attached to the opening 7 of the.

[Advantageous Effects of the Invention] As described above, in the present invention, the branch portion 1 is firmly joined to the tube 15, so that the branch portion 1 does not loosen even during work and the operability is good.

It is extremely hygienic because there is no risk of the adhesive leaching and solidifying between the branch 1 and the tube 15 or outside the branch 1.

It is a device having excellent effects such as.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded sectional view of a branch portion of an extracorporeal circulation circuit of the present invention, FIG. 2 is an AA sectional view of FIG. 1, and FIG. 3 is an upper part and a lower part. Fig. 4 is an enlarged view near the joint surface of
FIG. 5 is a completed view of the assembly, FIG. 5 and FIG. 6 are schematic views of a joining member inserted into the insertion tube of the present invention, FIG. 7 is a schematic view showing an example of an extracorporeal circulation circuit, and FIG. FIG. 9 is an exploded sectional view of the branch portion. In the figure, 1 is a branch part, 2 is an upper part, 3 is a lower part,
4 is an insertion tube, 5 and 6 are tube mounting grooves, 7 is an opening,
8, 9 are end faces, 10 is a fitting groove, 11 is a fitting protrusion, 1
Reference numerals 2 and 13 denote a collar portion, 15 a tube, 16 a mixed injection rubber button, 17 a mixed injection cover, and 18 a housing.

Claims (1)

[Scope of utility model registration request] 1. A branch part installed in the middle of an extracorporeal circulation circuit, comprising: (B) an insertion tube for a joining member formed integrally on the ceiling and a mounting groove for the tube formed inside; and a bottom part. And (C) a lower part having a flange formed on the top surface and having a tube mounting groove formed therein, (D) each of the upper part and the lower part. Fitting protrusions (or fitting grooves) and fitting grooves (or fitting protrusions) are formed on the end faces of the flanges that face each other, and (E) Tubes are mounted in the tube mounting grooves of the upper and lower parts. (F) The branch part of the extracorporeal circulation circuit, characterized in that (F) the end surfaces of the flange parts of the upper part and the lower part facing each other are welded by high frequency or ultrasonic waves.