JPS5841963Y2 - Hollow fiber artificial kidney - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a hollow fiber type artificial kidney having a flat shape.

Hollow fiber artificial kidneys have excellent features such as small size, light weight, and low blood volume. However, many inventions and ideas have been made to solve this problem, but they are still insufficient.

For example, the hollow fiber type artificial kidney with a flat shape shown in Utility Model Application Publication No. 51-48397 is designed to uniformly contact the hollow fibers and the dialysate by the flow of the dialysate in the diagonal direction of the casing. , it shows excellent dialysis efficiency, but on the long side surface of the rectangular cross section, a part separated from the diagonal dialysate flow is created, and the dialysate stagnates, resulting in lower than the expected dialysis efficiency. It is acknowledged that there are disadvantages in not being able to obtain the desired results.

The present invention is intended to solve the above-mentioned drawbacks, and an embodiment of the present invention will be described based on the drawings. FIG. 1 is a partially cutaway front view, and FIG. This is a cross-sectional view of A, in which the long side surface of the cylindrical casing 2 with a rectangular cross section of the hollow fiber artificial kidney 1 of the present invention is a parallelogram, and the dialysate is placed at an acute angle of the parallelogram. By flowing diagonally between the curved corners, the stagnation area of the dialysate is greatly reduced compared to a rectangular surface.

A large number of permeable hollow fibers 3 are accommodated in the longitudinal direction of the casing 2, and both ends of the hollow fibers are supported by a tube sheet 4°4, and open at the outer end surface of the tube sheet to communicate with blood inlets and outlets 5, 5. , the dialysate flows through the casing 2 between the bulges 6, 6, which are adjacent to the inner end surfaces of the opposing tube sheets 4, 4, and which are provided on the parallelogram-shaped opposing surfaces of the casing 2, respectively. The dialysate flows diagonally with respect to a vertically long rectangular surface forming the side surface of the dialyzer, and since the width of the vertically long rectangular surface is narrow, stagnation of the dialysate away from the diagonal does not occur.

Further, the dialysate is supplied through a dialysate inlet/outlet lower 7 connected to the bulging parts 6, 6 from a part of the acute corner of the parallelogram.
Since the flow of dialysate regarding the parallelogram part will flow diagonally between the acute angle parts, the stagnant part of the dialysate will be wider than in the case of a rectangular surface. dialysis efficiency is improved.

As described above, the present invention provides a highly efficient hollow fiber artificial kidney in which the stagnation area of dialysate is greatly reduced by having a rectangular cross section and a parallelogram-shaped long side surface of the casing. It is something.

[Brief explanation of the drawing]

The drawings show an embodiment of the hollow fiber artificial kidney of the present invention, in which FIG. 1 is a partially cutaway front view, and FIG. 2 is a sectional view taken along line A-A in FIG. 7.7 shows the bulging part and the dialysate inlet/outlet.

Claims (1)

[Scope of utility model registration request] The long side surface of the casing having a rectangular cross section is a parallelogram, and both ends of a large number of permeable hollow fibers housed longitudinally within the casing are supported by a tube sheet, and the tube sheet One bulge is provided on each side of the opposing parallelogram, and one bulge is opened on the outer end surface and communicates with the blood inlet/outlet, and is adjacent to the inner end surface of the opposing tube sheet. is connected to the bulge at an acute corner side of the parallelogram.