JPH041951Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a body fluid treatment device. The device of the present invention is used as an artificial kidney, an artificial lung, an artificial liver, a blood purification device, and a plasma separation device, and is particularly suitable for a blood purifier that adsorbs and removes harmful substances from a patient's blood to treat diseases.

(Prior Art and Problems) Currently, body fluid treatment devices using adsorbents are commercially available, and are constructed from a container having a body fluid inlet and an inlet and filled with an adsorbent.

In the treatment of body fluids, the body fluids are introduced into the container, brought into contact with an adsorbent, and harmful substances in the body fluids are adsorbed and removed.

However, if fine dust is generated from this adsorbent due to some kind of impact over time,
Because of the risk of contamination with body fluids, it was necessary to remove the body fluids before returning them to the patient.

Therefore, when used, a filter for dust removal or a filter with a small surface area is installed in the middle of the extracorporeal circulation circuit used in connection with a body fluid treatment device to perform body fluid treatment.

In the former case, the extracorporeal circulation circuit becomes complicated and operability decreases accordingly. Further, in the latter case, there was a problem that the filter was easily clogged. In order to solve the above-mentioned problems, the present inventor conducted intensive studies and arrived at the following idea.

(Means for Solving the Problems) Therefore, the present invention provides a cap in which a body fluid outlet is formed in the casing, which has a cleaning liquid outlet on the side and a fitting groove for a filter member on the inner circumferential surface. A cap with an inlet for body fluids is attached,
A filter member is fitted into the fitting groove, and the hollow fiber filter and adsorbent converged into a loop are separated and loaded into the casing, and the end of the hollow fiber filter on the body fluid outlet side is open. and the end on the adsorbent side is closed to provide a body fluid treatment device.

(Function) Body fluid is introduced through the body fluid inlet and harmful substances in the body fluid are removed using an adsorbent. The purified body fluid is returned to the patient via a mesh filter, a hollow fiber filter, and a body fluid outlet. The fine dust generated from the adsorbent is blocked by the hollow fiber filter and there is no risk of it getting mixed into the body fluid and entering the patient's body.

(Embodiment) FIG. 1 is a sectional view showing the structure of an embodiment of a body fluid treatment device 1 of the present invention.

In the figure, 2 is a casing, and a cleaning liquid outlet 3 is formed on the side of the casing 2, and a cap 5 in which a body fluid inlet 4 is formed and a body fluid outlet 6 are formed at both ends. Cap 7 is attached.

In the figure, reference numeral 8 denotes a housing chamber for hollow fiber filters 9, which are converged into a loop shape, open on the body fluid outlet 6 side, and fixed with a sealant 10 such as polyurethane. The other end on the adsorbent side is closed.

Reference numeral 11 denotes a storage chamber for an adsorbent 12 such as activated carbon or alumina, which is filled with the adsorbent 12, and both ends of the chamber are partitioned by nylon mesh filters 13.

The mesh filter 13 is formed in a shape that matches the cross-sectional shape of the casing 2, as shown in FIG. 2, and a support ring 14 made of hard plastic is attached to the outer edge (FIG. 2b shows
(A sectional view taken along line A-A of the mesh filter 13 in FIG. 2a) is shown.

15 and 16 are fitting grooves formed to fit the support ring 14 of the mesh filter 13, which are formed along the inner circumferential surface of the casing 2;
When injection molding casing 2, casing 2
It may be integrally molded with the material or may be installed later as a separate component after injection molding.

The body fluid treatment device 1 of the present invention is assembled as shown in FIG. A hollow fiber filter converged in a loop shape is loaded into the casing 2 (Fig. 3a) formed by injection molding, and fixed with a sealant 10 with the body fluid outlet 6 side open (Fig. 3b). ).

The mesh filter 13 is fixed to the fitting groove 15 formed in the center of the casing 2, and then the adsorbent 12 is loaded into the casing 2, and the mesh filter is inserted into the fitting groove 16 formed at the end of the casing 2. 13 (Fig. 3c).

Finally, the caps 5 and 7 are attached to both ends of the casing 2 to complete the assembly and subjected to high-pressure steam sterilization (Fig. 3d).

Next, the method of use will be explained (Fig. 4).

First, after connecting to the extracorporeal circulation circuit, dust adhering to the adsorbent is washed and removed using a cleaning liquid as follows.

The body fluid outlet 6 is closed, the body fluid inlet 4 and the cleaning liquid outlet 3 are opened, and the cleaning liquid is introduced from the body fluid inlet 4. The dust adhering to the adsorbent is discharged from the cleaning liquid outlet 3 together with the cleaning liquid.

The dust is partially prevented from moving by the hollow fiber filter 9 and floats in the storage chamber 8 ((FIG. 4a)).

Open the body fluid outlet 6, close the body fluid inlet 4,
Further, the cleaning liquid is continued to be introduced through the body fluid outlet 6, and the dust floating in the storage chamber of the hollow fiber filter 9 is completely discharged together with the cleaning liquid from the cleaning liquid outlet 3 ((FIG. 4b)).

After cleaning is completed as described above, clean the cleaning liquid outlet 3.
is closed, the body fluid inlet 4 is opened, and body fluid is introduced from the body fluid inlet 4. Harmful substances in body fluids can be removed using adsorbent 1.
2 is removed. The purified body fluid is filtered by a hollow fiber filter 9 and returned to the patient through a body fluid outlet 6. Fine dust generated from the adsorbent 12 over time is blocked by the hollow fiber filter 9, so there is no risk of it entering the patient's body ((FIG. 4c)).

(Effects of the invention) As explained above, in the present invention, (1) The fine dust generated from the adsorbent is blocked by the hollow fiber filter, and there is no risk of it getting mixed into body fluids and entering the patient's body.

(2) The hollow fiber filter for removing dust has a large filtration area, so there is no risk of clogging.

(3) By fitting the mesh filter into the fitting groove formed in the casing with one touch, a storage chamber for the hollow fiber filter and the adsorbent can be easily formed in the same casing using the mesh filter as a partition. It is easy to assemble.

This is a device that has excellent effects such as.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the body fluid treatment device of the present invention, Fig.
The figure is an enlarged cross-sectional view of the fitting groove and mesh filter.
FIG. 3 is an assembly process diagram of the body fluid treatment device, and FIG. 4 is a schematic diagram showing how the body fluid treatment device is used. In the figure, 1 is a body fluid treatment device, 2 is a casing, 3 is a cleaning liquid outlet, 4 is a body fluid inlet, 6 is a body fluid outlet, 5 and 7 are caps, 8 is a housing chamber for a hollow fiber filter, 9 1 is a hollow fiber filter, 10 is a sealant, 11 is an adsorbent storage chamber, 12 is an adsorbent, 1
3 is a mesh filter, 14 is a support ring, 1
5 and 16 indicate fitting grooves.

Claims (1)

[Scope of Claim for Utility Model Registration] A cap with a body fluid outlet and a body fluid inlet are formed in the casing, which has a cleaning liquid outlet on the side and a fitting groove for a filter member on the inner circumferential surface. the cap is attached, a filter member is fitted into the fitting groove, the hollow fiber filter and adsorbent converged into a loop are fractionated and loaded into the casing, and the body fluid conduction of the hollow fiber filter is carried out. A body fluid treatment device characterized in that an end on the outlet side is open and an end on the adsorbent side is closed.