Dialysis tube with bidirectional laminar flow

Abstract

The utility model discloses a kind of dialysis tubes of bidirectional laminar flow, including pipe body, inner passage, outer passage and fiber bundle film;Two liquid inlets and two liquid outlets are provided on the side of pipe body;Inner passage is communicated with two liquid inlets;Outer passage is set around inner passage, outer passage lower end is communicated to inner passage lower end, and outer passage is communicated to two liquid outlets;Fiber bundle film is communicated to the two ports of pipe body to transport back blood.The utility model is communicated to inner passage bottom by setting inner passage and outer passage in pipe body, and when dialysate is injected into inner passage through liquid inlet, dialysate can form dialysate laminar flow in inner passage, dialysate can form waste liquid laminar flow in outer passage after flowing into outer passage by dialysis, to form bidirectional laminar flow to improve hemodialysis effect.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a bidirectional laminar flow dialysis tube. Background Technology

[0002] Dialysis is a treatment for kidney failure that uses diffusion, osmosis, and ultrafiltration to mimic the kidneys outside the body, removing accumulated waste, salts, and excess water. When the kidneys are not functioning properly, dialysis can help maintain electrolyte and fluid balance in the body.

[0003] Currently, hemodialysis is typically performed using dialyzers. The dialyzer connects to infusion tubes via caps at both ends, and these caps are linked by several fiber optic tubes made of semi-permeable membranes. Dialysate is then injected into the dialyzer, creating a concentration gradient with the blood in the fiber optic tubes. This allows waste products and excess salts in the blood to pass through the semi-permeable membranes into the dialysate and be expelled. In existing dialyzers, the inlets for injecting and expelling dialysate are usually positioned perpendicular to one side of the dialyzer's outer wall. Therefore, when the dialysate is injected into the dialyzer, its flow direction is perpendicular to the fiber optic tubes, and it flows through the dialyzer before being expelled. During this process, the side of the dialyzer furthest from the inlets experiences poorer dialysate flow due to the influence of the fiber optic tubes. Consequently, the waste concentration in the dialysate on this side increases as dialysis progresses, reducing the effectiveness of blood removal in the fiber optic tubes on that side. Furthermore, the blood on this side mixes with the blood in the fiber optic tubes on the other side through the caps, further compromising the dialysis effect.

[0004] Therefore, the existing method of hemodialysis using a dialyzer has a problem: because the inlet for injecting and draining dialysate is set perpendicular to the fiber optic tube on one side of the dialyzer, the dialysate on the side away from the inlet has poor flow, which in turn leads to a poorer dialysis effect. Utility Model Content

[0005] The purpose of this invention is to provide a bidirectional laminar flow dialysis tube to solve the technical problem in the prior art where the inlet for injecting and discharging dialysis fluid is perpendicular to the fiber capillary and located on one side of the dialyzer, resulting in poor flow of dialysis fluid on the side away from the inlet, which in turn leads to a poorer dialysis effect.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A bidirectional laminar flow dialysis tube includes a tube body, the tube body having an inner channel and an outer channel, the outer channel being arranged around the inner channel, and the bottoms of the inner channel and the outer channel being connected;

[0008] Two liquid inlets and two liquid outlets are provided on the periphery of the tube body. The two liquid inlets are symmetrically arranged and connected to the inner channel, and the two liquid outlets are symmetrically arranged and connected to the outer channel.

[0009] The inner channel contains a fiber bundle membrane, the two ends of which are connected to the two ends of the tube body. The fiber bundle membrane is used to transport blood and can perform permeation.

[0010] When blood is delivered to the fiber bundle membrane at the end of the tube, dialysate is introduced into the two inlets from opposite directions to form a dialysate laminar flow in the inner channel. After the dialysate permeates with the blood in the fiber bundle membrane, it flows into the outer channel from the bottom to form a waste liquid laminar flow and is discharged from the two outlets from opposite directions to form a bidirectional laminar flow for blood dialysis.

[0011] As a preferred embodiment of this utility model, a guide layer is provided at one end of the inner channel near the liquid inlet. The guide layer is located at the centerline between the two liquid inlets, and the side of the guide layer facing the liquid inlet has a concave arc surface.

[0012] As a preferred embodiment of this utility model, a guide groove is provided at the bottom connection between the inner channel and the outer channel, and the cross-section of the guide groove is two parallel arcs.

[0013] In a preferred embodiment of this invention, the fiber bundle membrane is disposed through the guide layer and the flow channel.

[0014] As a preferred embodiment of this utility model, the tube body is provided with a blood inlet cap and a bleeding cap on both sides, and the blood inlet cap and the bleeding cap are connected through the fiber bundle membrane.

[0015] In a preferred embodiment of this utility model, the blood inlet cap is disposed at the end of the tube body away from the liquid inlet, and the bleeding cap is disposed at the end of the tube body close to the liquid inlet.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This invention features an inner channel and an outer channel within the tube, with the bottom of the inner channel connected to the outer channel. When dialysate is injected into the inner channel through the inlet, the dialysate forms a laminar flow within the inner channel. After undergoing dialysis, the dialysate flows into the outer channel and forms a laminar flow of waste liquid within the outer channel, thus creating a bidirectional laminar flow to improve the hemodialysis effect. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a bidirectional laminar flow dialysis tube is provided for an embodiment of this utility model.

[0020] The labels in the diagram represent the following:

[0021] 1-Tube body; 2-Inner channel; 3-Outer channel; 4-Fiber bundle membrane;

[0022] 11-Inlet; 12-Outlet; 13-Blood inlet cap; 14-Bleeding cap; 21-Guide layer; 31-Flow guide groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, this utility model provides a bidirectional laminar flow dialysis tube, including a tube body 1, with an inner channel 2 and an outer channel 3 inside the tube body 1. The outer channel 3 is arranged around the inner channel 2, and the bottoms of the inner channel 2 and the outer channel 3 are connected.

[0025] Two liquid inlets 11 and two liquid outlets 12 are provided on the periphery of the pipe body 1. The two liquid inlets 11 are symmetrically arranged and connected to the inner channel 2, and the two liquid outlets 12 are symmetrically arranged and connected to the outer channel 3.

[0026] The inner channel 2 is provided with a fiber bundle membrane 4, and the two ends of the fiber bundle membrane 4 are respectively connected to the two ends of the tube body 1. The fiber bundle membrane 4 is used to transport blood and can perform permeation.

[0027] When blood is delivered to the fiber membrane 4 at the end of the tube body 1, dialysate is introduced into the two inlets 11 in opposite directions to form a dialysate laminar flow in the inner channel 2. After the dialysate and the blood in the fiber membrane 4 permeate, the dialysate flows into the outer channel 3 through the bottom to form a waste liquid laminar flow, and is discharged through the two outlets 12 in opposite directions to form a bidirectional laminar flow for hemodialysis.

[0028] In this embodiment, an inner channel 2 and an outer channel 3 are provided inside the tube body 1, and two inlets 11 and two outlets 12 are provided on the periphery of the tube body 1. The two inlets 11 are symmetrically connected to the inner channel 2, and the two outlets 12 are symmetrically connected to the outer channel 3. A fiber bundle membrane 4 is provided inside the inner channel 2. When blood is transported through the fiber bundle membrane 4, the two inlets 11 can inject dialysate in opposite directions to form a dialysate laminar flow in the inner channel 2. After the dialysate undergoes osmosis, it flows from the bottom of the inner channel 2 into the outer channel 3 to form a waste liquid laminar flow and is discharged through the two outlets 12.

[0029] Compared to existing dialyzers with the inlet directly located on one side, this embodiment features an inner channel 2 and an outer channel 3 within the tube body 1. The bottom of the inner channel 2 connects to the outer channel 3. By injecting dialysate through the inlet 11, a laminar flow of dialysate can be formed within the inner channel 2. This allows for osmosis between the dialysate and the blood within the fiber membrane 4. The waste liquid generated by osmosis flows from the bottom of the inner channel 2 into the outer channel 3, forming a laminar flow of waste liquid, and then flows out from the outlet 12, thus creating a bidirectional laminar flow for hemodialysis.

[0030] To avoid turbulence at the end of the inner channel 2 when the dialysate is injected from the two inlets 11 in opposite directions, the following preferred embodiment is proposed.

[0031] like Figure 1 As shown, a guide layer 21 is provided at one end of the inner channel 2 near the liquid inlet 11. The guide layer 21 is located at the center line between the two liquid inlets 11, and the side of the guide layer 21 facing the liquid inlet 11 is a concave arc surface.

[0032] Specifically, the guide layer 21 can guide the dialysate injected into the inlet 11 to form a laminar flow in the inner channel 2, avoiding direct impact after the dialysate is injected.

[0033] To ensure that the dialysate can flow smoothly into the external pipe 3 after dialysis to form a laminar flow of waste liquid, the following preferred embodiments are proposed.

[0034] like Figure 1 As shown, a guide groove 31 is provided at the bottom connection of the inner channel 2 and the outer channel 3. The cross-section of the guide groove 31 is two parallel arcs.

[0035] Specifically, the guide channel 31 can guide the dialysis waste liquid into the external pipe 3 to form a laminar flow of waste liquid.

[0036] Since the fiber bundle membrane 4 needs to connect the two ends of the tube to deliver blood, the following preferred embodiments are proposed.

[0037] like Figure 1 As shown, the fiber bundle membrane 4 is disposed through the guide layer 21 and the flow channel 31.

[0038] Specifically, the fiber bundle membrane 4 penetrates the guide layer 21 and the flow channel 31 to connect the two ends of the tube body 1 to transport blood.

[0039] In order to maintain a large concentration difference between the dialysate and the blood, the dialysate and blood are usually arranged in a convection configuration. Therefore, the following preferred embodiments are provided.

[0040] like Figure 1 As shown, the tube body 1 is provided with a blood inlet cover 13 and a bleeding cover 14 on both sides, and the blood inlet cover 13 and the bleeding cover 14 are connected by a fiber bundle membrane 4.

[0041] The blood inlet cap 13 is located at the end of the tube body 1 away from the inlet port 11, and the bleeding cap 14 is located at the end of the tube body 1 close to the inlet port 11.

[0042] Specifically, blood flows into the fibrous membrane 4 through the inlet cover 13 and flows out through the bleeding cover 14, thereby forming convection with the dialysate in the inner tubing 2 to improve the dialysis effect.

[0043] In this embodiment, dialysate is injected into the tube body 1 through the inlet 11 to expel the air from the tube body 1. Then, blood is injected into the fiber bundle membrane 4 through the blood inlet cap 13. At this time, the dialysate is guided by the guide layer 21 and forms a dialysate laminar flow along the fiber bundle membrane 4 in the inner tube 2, and flows towards the blood inlet cap 11. At the same time, it washes the waste in the blood. The dialysate flows to the guide groove 31, flows through the guide groove 31 to the outer channel 3 to form a waste liquid laminar flow, and is discharged through the outlet 12.

[0044] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A bidirectional laminar flow dialysis tube, characterized in that, It includes a tube body (1), which has an inner channel (2) and an outer channel (3) inside. The outer channel (3) is arranged around the inner channel (2), and the bottoms of the inner channel (2) and the outer channel (3) are connected. Two liquid inlets (11) and two liquid outlets (12) are provided on the periphery of the tube body (1). The two liquid inlets (11) are symmetrically arranged and connected to the inner channel (2), and the two liquid outlets (12) are symmetrically arranged and connected to the outer channel (3). A fiber bundle membrane (4) is provided in the inner channel (2), and the two ends of the fiber bundle membrane (4) are respectively connected to the two ends of the tube body (1). The fiber bundle membrane (4) is used to transport blood and can perform permeation. When blood is delivered from the end of the tube (1) to the fiber bundle membrane (4), the two inlets (11) input dialysate in opposite directions to form a dialysate laminar flow in the inner channel (2). After the dialysate permeates with the blood in the fiber bundle membrane (4), it flows into the outer channel (3) through the bottom to form a waste liquid laminar flow and is discharged in opposite directions through the two outlets (12) to form a bidirectional laminar flow for blood dialysis.

2. The bidirectional laminar flow dialysis tube according to claim 1, characterized in that, The inner channel (2) is provided with a guide layer (21) at one end near the liquid inlet (11). The guide layer (21) is located at the midline between the two liquid inlets (11), and the side of the guide layer (21) facing the liquid inlet (11) is a concave arc surface.

3. The bidirectional laminar flow dialysis tube according to claim 2, characterized in that, A guide groove (31) is provided at the bottom connection of the inner channel (2) and the outer channel (3), and the cross section of the guide groove (31) is two parallel arcs.

4. The bidirectional laminar flow dialysis tube according to claim 3, characterized in that, The fiber bundle membrane (4) is disposed through the guide layer (21) and the flow channel (31).

5. A bidirectional laminar flow dialysis tube according to claim 1, characterized in that, The tube body (1) is provided with a blood inlet cap (13) and a bleeding cap (14) on both sides, and the blood inlet cap (13) and the bleeding cap (14) are connected through the fiber bundle membrane (4).

6. The bidirectional laminar flow dialysis tube according to claim 5, characterized in that, The blood inlet cap (13) is located at the end of the tube body (1) away from the liquid inlet (11), and the bleeding cap (14) is located at the end of the tube body (1) close to the liquid inlet (11).

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