Hemodialyzer

Abstract

A hemodialyzer comprises a shell, a plurality of dialysis fibers located in the shell and two pieces of packaging glue arranged at the two ends of the dialysis fibers respectively and connected with the inner wall of the shell, end covers are arranged at the two ends of the shell respectively, a blood inlet and a blood outlet are formed in the two end covers respectively, and a dialysate outlet is formed in the position, adjacent to the blood inlet, of the shell. A dialysate inlet is formed in the position, adjacent to the blood outlet, of the shell, a spiral dialysate pipe is arranged in the shell in the length direction, a plurality of liquid outlet holes are evenly distributed in the dialysate pipe, a plurality of dialysis fibers are arranged on the inner side and the outer side of the dialysate pipe in a penetrating mode, one end of the dialysate pipe extends towards the inner wall of the shell and is opposite to the dialysate inlet, and the other end of the dialysate pipe extends towards the outer wall of the shell. And the other end of the dialysate tube is positioned among the plurality of dialysis fibers. According to the hemodialyzer, dialysate flows along the spiral dialysate pipe after entering the shell, the distribution uniformity and fluidity of the dialysate are improved, the dialysate can permeate into the center of a membrane bundle composed of a plurality of hollow fibers conveniently, and therefore resistance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hemodialysis equipment, in particular to a hemodialyzer. Background Art

[0002] Hemodialysis (HD) is one of the renal replacement therapies for patients with acute and chronic renal failure.

[0003] As an important device in hemodialysis, the dialyzer is used to introduce the patient's blood into the hollow fiber membrane in the dialyzer through an extracorporeal circulation device, and then the dialysate flows outside the hollow fiber membrane, and exchanges substances through diffusion, ultrafiltration, adsorption and convection principles to remove metabolic waste in the body, maintain electrolyte and acid-base balance, and remove excess water in the body. In this process, the flow state of the dialysate plays a very important role in the removal of toxins. After the dialysate enters the shell from the dialysate inlet, since the hollow fiber membrane bundle occupies most of the space in the shell, the dialysate will flow along the area with less resistance between the dialyzer shell and the membrane bundle, and then penetrate into the periphery of the hollow fiber membrane bundle with less resistance; as the dialysis process proceeds, the dialysate begins to gradually penetrate into the central area of ​​the membrane bundle, but because the number of hollow fiber membrane bundles is large and the density is high, it is difficult for the dialysate to enter the center of the membrane bundle composed of multiple hollow fibers, which affects the removal performance of the dialyzer. Utility Model Content

[0004] The utility model aims to provide a hemodialyzer, which is convenient for dialysate to enter the center of a membrane bundle composed of a plurality of hollow fibers, reduces the permeation resistance of the dialysate, and improves the removal performance of the dialyzer.

[0005] To achieve the above-mentioned purpose, the following technical scheme is adopted: a hemodialyzer comprises a shell, a plurality of dialysis fibers located in the shell, and two pieces of packaging glue respectively arranged at the two ends of the dialysis fibers and connected to the inner wall of the shell, the two ends of the shell are respectively provided with end caps, the two end caps are respectively provided with a blood inlet and a blood outlet, the shell adjacent to the blood inlet is provided with a dialysate outlet, and the shell adjacent to the blood outlet is provided with a dialysate inlet, a spiral dialysis fluid tube is provided in the shell along the length direction, the dialysis fluid tube is evenly distributed with a plurality of liquid outlet holes, a plurality of dialysis fibers are penetrated on both sides of the dialysis fluid tube, one end of the dialysis fluid tube extends to the inner wall of the shell and is opposite to the dialysis fluid inlet, and the other end of the dialysis fluid tube is located between the plurality of dialysis fibers.

[0006] Preferably, a baffle is provided in an annular shape on the inner wall of the shell, and the baffle is located on the right side of the dialysate inlet.

[0007] Preferably, the inner ring wall of the baffle plate is gap-matched with the dialysis fiber.

[0008] Preferably, caps are provided on the blood inlet, the blood outlet, the dialysate outlet and the dialysate inlet.

[0009] Preferably, the end cover is provided with an internal thread, the shell is provided with an external thread, and the shell is threadably connected to the end cover.

[0010] Preferably, a plurality of circumferentially distributed elastic sheets are provided on adjacent sides of the two end covers, and the elastic sheets abut against the packaging glue.

[0011] Preferably, the dialysis fibers are all hollow structures.

[0012] Beneficial effects achieved by the utility model:

[0013] The utility model provides a hemodialyzer, which is provided with a spiral dialysate tube and a liquid outlet hole, so that the dialysate flows along the spiral dialysate tube after entering the shell, thereby improving the uniformity of dialysate distribution and fluidity, thereby facilitating the dialysate to penetrate into the center of a membrane bundle composed of multiple hollow fibers, thereby reducing the penetration resistance caused by the dialysate directly penetrating into the center of the membrane bundle composed of multiple hollow fibers after entering the shell, thereby improving the removal performance of the dialyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the structure of a hemodialyzer. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0017] See attached Figure 1A hemodialyzer comprises a shell 1, a plurality of dialysis fibers 2 located in the shell 1, and two pieces of packaging glue 3 respectively arranged at the two ends of the dialysis fibers 2 and connected to the inner wall of the shell 1, wherein the inner cross-section of the shell 1 is a circular or polygonal structure, and the dialysis fibers 2 are all hollow structures, and end caps 4 are respectively arranged at the two ends of the shell 1, and the two end caps 4 are respectively provided with a blood inlet 5 and a blood outlet 6, and the shell 1 adjacent to the blood inlet 5 is provided with a dialysate outlet 7, and the shell 1 adjacent to the blood outlet 6 is provided with a dialysate inlet 8, and a spiral dialysate tube 9 is arranged in the shell 1 along the length direction, and the dialysate tube 9 is evenly distributed with a plurality of A plurality of dialysis fibers 2 are arranged on both sides of the dialysate tube 9. One end of the dialysate tube 9 extends toward the inner wall of the shell 1 and is opposite to the dialysate inlet 8. The other end of the dialysate tube 9 is located between the plurality of dialysis fibers 2 or is opposite to the dialysate outlet 7. By arranging a spiral dialysate tube 9 and opening a liquid outlet in the dialysate tube 9, the dialysate flows along the spiral dialysate tube 9 after entering the shell 1 and realizes uniform distribution of the dialysate, thereby facilitating the dialysate to penetrate into the center of the membrane bundle composed of multiple hollow fibers, so as to reduce the permeation resistance caused by the dialysate directly penetrating into the center of the membrane bundle composed of multiple hollow fibers after entering the shell.

[0018] Among them, the number of spiral dialysate tubes 9 is 1-3, all of which are provided with liquid outlets, and the radial sizes are different, that is, the distances from the outer circle of the spiral dialysate tube to the central axis of the shell are different. At the same time, the inlets of the dialysate tubes 9 are arranged opposite to the dialysate inlet 8, thereby further improving the uniformity and flow effect of the dialysate and reducing the resistance.

[0019] In this embodiment, a baffle 10 is provided in an annular shape on the inner wall of the housing 1 , and the baffle 10 is located on the right side of the dialysate inlet 8 to facilitate the dialysate to enter the dialysate tube.

[0020] The inner annular wall of the baffle 10 is gap-matched with the dialysis fiber 2 so that the dialysis fluid forms at least two flow paths after entering the shell.

[0021] In order to ensure safety before use, caps 11 are provided on the blood inlet 5 , the blood outlet 6 , the dialysate outlet 7 and the dialysate inlet 8 .

[0022] Specifically, the end cover 4 is provided with an internal thread, the shell 1 is provided with an external thread, and the shell 1 is threadably connected to the end cover 4 .

[0023] In this embodiment, in order to prevent the packaging glue from loosening, a plurality of circumferentially distributed elastic sheets 12 are provided on adjacent sides of the two end covers 4 , and the elastic sheets 12 abut against the packaging glue 3 .

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hemodialyzer, comprising a housing (1), a plurality of dialysis fibers (2) located in the housing (1), and two pieces of packaging glue (3) respectively arranged at the two ends of the dialysis fibers (2) and connected to the inner wall of the housing (1), the housing (1) being provided with end caps (4) at both ends, the two end caps (4) being provided with a blood inlet (5) and a blood outlet (6) respectively, the housing (1) adjacent to the blood inlet (5) being provided with a dialysate outlet (7), and the housing (1) adjacent to the blood outlet (6) being provided with a dialysate inlet (8), characterized in that: A spiral dialysate tube (9) is arranged in the shell (1) along the length direction, and a plurality of liquid outlet holes are evenly distributed on the dialysate tube (9). A plurality of dialysate fibers (2) are arranged on both sides of the dialysate tube (9). One end of the dialysate tube (9) extends toward the inner wall of the shell (1) and is opposite to the dialysate inlet (8), and the other end of the dialysate tube (9) is located between the plurality of dialysate fibers (2).

2. A hemodialyzer according to claim 1, characterized in that: The inner wall of the housing (1) is provided with a baffle (10) in the shape of a ring, and the baffle (10) is located on the right side of the dialysate inlet (8).

3. A hemodialyzer according to claim 2, characterized in that: The inner annular wall of the baffle (10) is gap-matched with the dialysis fiber (2).

4. A hemodialyzer according to claim 1, characterized in that: Caps (11) are provided on the blood inlet (5), the blood outlet (6), the dialysate outlet (7) and the dialysate inlet (8).

5. A hemodialyzer according to claim 1, characterized in that: The end cover (4) is provided with an internal thread, the shell (1) is provided with an external thread, and the shell (1) is threadably connected to the end cover (4).

6. A hemodialyzer according to claim 1, characterized in that: A plurality of circumferentially distributed elastic sheets (12) are provided on adjacent sides of the two end covers (4), and the elastic sheets (12) are pressed against the packaging glue (3).

7. A hemodialyzer according to claim 1, characterized in that: The dialysis fibers (2) all have a hollow structure.

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