JPH0341711Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an artificial kidney, a plasma separator, an artificial heart-lung machine, and other hollow fiber type mass transfer devices.

(Prior Art and its Problems) It is well known that hollow fiber type mass transfer devices have been used in blood purification, separation of specific components in blood, gas exchange, and the like.

As an example, FIG. 4 shows a partial sectional view of a hollow fiber type artificial kidney.

In this hollow fiber type artificial kidney, a large number of hollow fibers 40 are bundled and housed inside a housing 30 provided with an inlet 31 and an outlet 32 for dialysate, and both upper and lower ends of the hollow fibers are fixed with a fixing material 33 such as polyurethane. In addition, blood inlets 34 are provided at the upper and lower ends of the housing 30.
And the blood outlet 35 is stopped by rings 36, 37.

In this case, in order to ensure watertightness of the space 38 of the blood inlet 34 (same for the blood outlet), conventionally,
A gasket 39 made of silicone rubber or the like is usually interposed between the peripheral edge of the upper surface of the fixing member 33 and the blood inlet 34.

However, in such a conventional seal structure, an expensive silicone rubber gasket must be used, and the installation work of the gasket 39 is troublesome, and the gasket 39 deteriorates during storage and blood leaks. It was also dangerous. Furthermore, there was also the disadvantage that the opening cross-sectional area of the hollow fiber bundle was restricted by the mounting position of the packing 39.

For this reason, as proposed in Japanese Patent Application Laid-Open No. 60-61006, a method of forming annular protrusions on the peripheral edges of the blood inlet/outlet ports 34 and 35 and pushing the annular protrusions into the fixing member for sealing has been proposed. It will be done. However, according to such a method, when pushing the annular protrusion into the fixing material, a process of heating and softening the fixing material is required, which is complicated.

The present invention was proposed as a result of studies to solve these conventional problems.

(Means for Solving the Problems) As shown in FIG. 1 corresponding to the embodiment, the present invention forms a ring-shaped protrusion 4 on the periphery of the hollow fiber fixing material 3 formed at the end of the housing 1. A groove 7 corresponding to the ring-shaped protrusion 4 is formed in the blood inlet cap 5 (the blood outlet side is an outlet cap; the same applies hereinafter). When the blood inlet cap 5 is attached to the housing, the groove 7 and the ring-shaped protrusion 4 are fitted in a watertight manner.

(Function) Since the groove 7 of the blood inlet cap 5 and the ring-shaped protrusion 4 formed on the fixing material fit together in a watertight manner, the blood that has entered the space 5a of the blood inlet cap 5 is absorbed by the fitting. The area is sealed and there is no possibility of leakage to the outside.

(Example) Hereinafter, a specific example of the present invention will be described based on FIGS. 1 to 3, taking the upper blood inlet side of a hollow fiber artificial kidney as an example.

First, in FIG. 1, numeral 1 denotes a housing provided with an inlet and an outlet for dialysate, as in the conventional case, and a hollow fiber bundle 2 is housed inside this housing 1. This hollow fiber bundle 2 is fixed at the upper end of the housing 1 by a fixing material 3 such as polyurethane, and the ends of each hollow fiber are open at the upper surface of the fixing material 3. Furthermore, one or more ring-shaped protrusions 4 are formed on the peripheral edge of the fixing member 3.

On the other hand, numeral 5 in the figure is a blood inlet cap, and an inlet 6 is formed in the center of the cap 5, and a ring-shaped groove 7 is formed on the inner surface at a position corresponding to the ring-shaped protrusion 4. has been done. The blood inlet cap 5 is attached to the upper end of the housing 1, and the groove 7 and the ring-shaped protrusion 4 are fitted in a water-tight manner.

In order to attach the cap 5 to the housing 1, screws 8 and 9 may be formed on the inner surface of the lower end of the cap 5 and the outer surface of the upper end of the housing 1 and screwed together, or a method such as fitting adhesive may be used. .

In order to improve the adhesion between the cap groove 7 and the fixing material ring-shaped protrusion 4 and to enhance the packing effect, it is necessary to satisfy the following conditions.
That is, as shown in FIG. 2, the ring-shaped protrusion 4
When the width of the groove 7 is a, the height is h, the clearance with the hollow fiber fixing part is b, the width of the groove 7 is A, the depth is H, and the width of the protruding edge is B, then A>a, B> b, H>h
It is preferable that

Next, an example of a method for manufacturing the above-mentioned device will be described. First, a hollow fiber bundle is housed in the housing 1, and then a mold 10 as shown in FIG. 3 is attached to the end of the housing 1. A ring-shaped groove 11 corresponding to the protrusion 4 to be formed is formed in this mold 10.

Thereafter, a fixative is injected from the dialysate inlet/outlet of the housing 1 and centrifuged, and the fixative moves to the end of the housing 1. After the fixing agent is solidified, the mold 10 is removed, and the ring-shaped protrusion 4 is formed on the fixing material 3 by the mold 10. Subsequently, as shown by the imaginary line in FIG. 3, the upper end of the fixing member 3 is cut to open the end of the hollow fiber, and then the blood inlet cap 5 is attached.

The above description has been made using the blood inlet side of the artificial kidney as an example, but the same applies to the blood outlet side. Moreover, it can be used not only for artificial kidneys but also for medical instruments such as plasma separators and heart-lung machines, industrial and household filters, and the like.

(Effects) According to the present invention explained above, the conventional expensive rubber gasket can be eliminated by fitting the ring-shaped protrusion on the periphery of the fixing material and the groove of the flow port cap for the material to be treated in a water-tight manner. At least the sealing performance of the cap space can be ensured.

In addition, by forming the ring-shaped protrusion and the corresponding cap groove near the edge of the housing, the opening cross-sectional area of the hollow fiber bundle can be made wider than before, which improves dialysis efficiency and
It is possible to prevent residual blood and blood clotting.

Furthermore, the ring-shaped protrusion of the fixing material can be easily molded using a mold, and the ring-shaped protrusion and groove fit together simply by attaching the flow port cap manufactured by injection molding etc. to the housing. Effects such as easier work can be obtained in comparison.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention;
The figure is a detailed view of the fixation material ring-shaped protrusion and the flow port cap groove, Figure 3 is a sectional view showing the method of forming the fixation material ring-shaped protrusion, and Figure 4 is a partial cross-section of a conventional hollow fiber artificial kidney. It is a diagram. In the figure, 1 is a housing, 2 is a hollow fiber bundle, 3 is a fixing member, 4 is a ring-shaped protrusion, 5 is a blood inlet cap,
7 is a groove, and 10 is a mold.

Claims (1)

[Scope of utility model registration request] A hollow fiber mass transfer device in which a hollow fiber bundle is housed in a housing, both ends of the hollow fiber bundle in the length direction are fixed with a fixing material, and caps for flow of a substance to be processed are attached to both ends of the housing. A ring-shaped protrusion is formed on the periphery of the fixing material, a groove corresponding to the ring-shaped protrusion is formed in the flow port cap, and the flow port cap is attached to the housing, and the groove is formed on the fixing material. A hollow fiber type mass transfer device characterized by being fitted in a ring-shaped protrusion in a watertight manner.