A kidney dialysis blood purification device

Abstract

This invention provides a hemopurification device for kidney dialysis, comprising a filter structure, a dialysate inlet, a blood inlet, a blood input tube, a dialysate outlet, a blood outlet, a blood output tube, a dialysate inlet tube, and a dialysate outlet. The dialysate inlet is fixedly installed at one end of the filter structure, and the blood inlet is fixedly installed above the dialysate inlet. The blood input tube is also fixedly installed above the blood inlet. The dialysate outlet is fixedly installed at the other end of the filter structure, and the blood outlet is fixedly installed above the dialysate outlet. The blood output tube is also fixedly installed above the blood outlet. The dialysate inlet tube is fixedly installed outside the dialysate inlet, and the dialysate outlet is fixedly installed outside the blood outlet. The arrangement of the dialysate inlet and blood inlet in this invention allows for longer blood purification times, effectively supports the blood tubing, and prevents bacteria from remaining inside the dialysate.

Description

Technical Field

[0001] This utility model relates to the field of kidney dialysis technology, and in particular to a kidney dialysis blood purification device. Background Technology

[0002] In the field of existing blood purification technology, kidney dialysis, as the main treatment for end-stage renal disease, has the core function of removing toxins and excess water from the blood through a semi-permeable membrane. Traditional dialysis equipment generally uses a linear hollow fiber dialyzer structure, where blood and dialysate flow counter-clockwise in parallel channels to complete the exchange of substances. However, existing kidney dialysis blood purification devices still have problems such as short blood purification time, inability to effectively support the blood tubing, and the easy presence of bacteria inside the dialysate.

[0003] Therefore, it is essential to invent a blood purification device for kidney dialysis. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a renal dialysis blood purification device, solving the issues of short blood purification time, inability to effectively support blood tubing, and easy bacterial contamination within the dialysate in existing renal dialysis blood purification devices. A renal dialysis blood purification device includes a filter structure, a dialysate inlet, a blood inlet, a blood input tube, a dialysate outlet, a blood outlet, a blood output tube, a dialysate inlet tube, and a dialysate outlet. The dialysate inlet is fixedly installed at one end of the filter structure, and the blood inlet is fixedly installed above the dialysate inlet. The blood input tube is also fixedly installed above the blood inlet. The dialysate outlet is fixedly installed at the other end of the filter structure, and the blood outlet is fixedly installed above the dialysate outlet. The blood output tube is also fixedly installed above the blood outlet. The dialysate inlet tube is fixedly installed outside the dialysate inlet, and the dialysate outlet is fixedly installed outside the blood outlet.

[0005] The dialysate inlet includes a sealing ring, an inlet pipe, a bacterial filter, and a stock solution inlet pipe. The sealing ring is fixedly installed at one end of the filter structure, and the inlet pipe is fixedly installed on the outside of the sealing ring. The bacterial filter is fixedly installed at one end of the inlet pipe, and the stock solution inlet pipe is fixedly installed at one end of the bacterial filter and connected to the stock solution inlet pipe.

[0006] The blood inlet includes a support cap, a connector, a stabilizing bracket, and a tubing stabilizer. The support cap is fixedly installed above the dialysate inlet. The connector is fixedly installed on the surface of the support cap and connected to the blood inlet tube. The stabilizing bracket is fixedly installed on the surface of the support cap, and a tubing stabilizer is fixedly installed on its top. The tubing stabilizer is slidably installed on the surface of the blood inlet tube.

[0007] The sealing ring inside the dialysate inlet is made of a set of medical plastic rings, and the sealing ring is connected to the filter structure to form an integral unit; the outer side of the bacterial filter is a circular plastic shell, and the inside of the bacterial filter uses a polyvinylidene fluoride filter element, and the filter element inside the bacterial filter is provided with filter pores with a pore size of 0.2 micrometers.

[0008] The overall structure of the blood inlet is completely consistent with that of the blood outlet, and the internal support cover of the blood inlet is a set of plastic caps, while the stabilizing bracket is a steel metal rod; the pipe stabilizing seat is a set of silicone cylindrical structures; the stabilizing bracket and the pipe stabilizing seat are connected as one unit and can be removed from the surface of the support cover for subsequent and repeated use.

[0009] The filter structure is a U-shaped tubular structure, and the length of the filter structure pipe path is twice the overall length.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The dialysate inlet of this invention utilizes a bacterial filter with an integrated 0.2-micron PVDF filter element to ensure the sterility of the dialysate and prevent microbial contamination of the blood, while a sealing ring ensures a leak-proof seal. This inlet is located at the lower end of the filter structure, forming a layered layout with the upper blood inlet, optimizing the countercurrent exchange efficiency between the dialysate and blood, thereby efficiently removing metabolic waste from the blood. Its modular design facilitates connection to the dialysate supply system, and regular maintenance of the filter and seals is required to ensure treatment safety and purification effectiveness.

[0011] 2. The blood inlet of this utility model is used to introduce blood into the dialysis filtration unit. The blood inlet is located above the dialysate inlet and is secured to the blood input tube by a silicone and steel composite structure supporting the cap and tube stabilizer, ensuring a secure and vibration-resistant connection. The connection port connects to the extracorporeal circulation tubing, forming a closed blood passage. Its symmetrical design is consistent with the blood outlet structure, facilitating standardized operation and maintaining stable blood flow within the U-shaped filtration structure. This provides the necessary prerequisite for subsequent solute exchange between blood and dialysate through a semi-permeable membrane. Furthermore, the detachable stabilizing support design facilitates clinical maintenance and reuse.

[0012] 3. The filter structure of this utility model has the following functions: through its unique U-shaped extended flow channel design, it significantly prolongs the residence time of blood in the device, allowing toxin molecules such as urea and creatinine in the blood more time to permeate outward through the semi-permeable membrane. This extended path design increases the toxin diffusion time by approximately 40%. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the dialysis fluid inlet structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the blood importer structure of this utility model.

[0016] In the picture: Filter structure 1, dialysate inlet 2, sealing ring 21, inlet pipe 22, bacterial filter 23, raw material inlet pipe 24, blood inlet 3, support cap 31, connection port 32, stabilizing bracket 33, pipe stabilizing seat 34, blood inlet pipe 4, dialysate outlet 5, blood outlet 6, blood outlet pipe 7, dialysate inlet pipe 8, dialysate outlet 9. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] As attached Figure 1 To be continued Figure 3 As shown.

[0019] This utility model provides a renal dialysis blood purification device, comprising a filter structure 1, a dialysate inlet 2, a blood inlet 3, a blood input tube 4, a dialysate outlet 5, a blood outlet 6, a blood output tube 7, a dialysate inlet tube 8, and a dialysate outlet 9. The dialysate inlet 2 is fixedly installed at one end of the filter structure 1, and the blood inlet 3 is fixedly installed above the dialysate inlet 2. The blood input tube 4 is fixedly installed above the blood inlet 3. The dialysate outlet 5 is fixedly installed at the other end of the filter structure 1, and the blood outlet 6 is fixedly installed above the dialysate outlet 5. The blood output tube 7 is fixedly installed above the blood outlet 6. The dialysate inlet tube 8 is fixedly installed outside the dialysate inlet 2, and the dialysate outlet 9 is fixedly installed outside the blood outlet 6.

[0020] The dialysate inlet 2 includes a sealing ring 21, an inlet pipe 22, a bacterial filter 23, and a raw material inlet pipe 24. The sealing ring 21 is fixedly installed at one end of the filter structure 1, and the inlet pipe 22 is fixedly installed on the outside of the sealing ring 21. The bacterial filter 23 is fixedly installed at one end of the inlet pipe 22, and the raw material inlet pipe 24 is fixedly installed at one end of the bacterial filter 23 and connected to the raw material inlet pipe 24.

[0021] The blood inlet 3 includes a support cap 31, a connection port 32, a stabilizing bracket 33, and a pipe stabilizing seat 34. The support cap 31 is fixedly installed above the dialysate inlet 2. The connection port 32 is fixedly installed on the surface of the support cap 31 and connected to the blood inlet tube 4. The stabilizing bracket 33 is fixedly installed on the surface of the support cap 31, and the pipe stabilizing seat 34 is fixedly installed on its top. The pipe stabilizing seat 34 is slidably installed on the surface of the blood inlet tube 4.

[0022] The sealing ring 21 inside the dialysate inlet 2 is a set of medical plastic rings, and the sealing ring 21 is connected to the filter structure 1 to form an integral unit; the outer side of the bacterial filter 23 is a circular plastic shell, and the inside of the bacterial filter 23 uses a polyvinylidene fluoride filter element, and the filter element inside the bacterial filter 23 is provided with filter pores with a pore size of 0.2 micrometers.

[0023] The overall structure of the blood inlet 3 is completely consistent with that of the blood outlet 6. The internal support cover 31 of the blood inlet 3 is a set of plastic covers, and the stabilizing bracket 33 is a steel metal rod. The pipe stabilizing seat 34 is a set of silicone cylindrical structures. The stabilizing bracket 33 and the pipe stabilizing seat 34 are connected as one unit and can be removed from the surface of the support cover 31 for subsequent and repeated use.

[0024] The filter structure 1 is a U-shaped tubular structure, and the length of the pipe path of the filter structure 1 is twice its overall length.

[0025] This renal dialysis blood purification device employs a U-shaped extended flow channel design, achieving highly efficient blood purification by prolonging the blood's residence time in the filter structure 1. The core of the device consists of a polysulfone hollow fiber membrane forming a selective permeability barrier. Blood flows inside the filter element through the blood inlet 3 and blood input tube 4, while dialysate flows outside the filter element through the dialysate inlet 2 and dialysate inlet tube 8, creating a stable concentration gradient. This structural design increases the clearance rate of small molecule toxins. To ensure treatment safety and stability, the device incorporates a bacterial filter 23 at the dialysate inlet 2 and a silicone and steel composite stabilizing structure at the blood inlet 3, achieving precise ultrafiltration control and a reliable sterile dialysis environment within a standard 4-hour treatment cycle. Finally, the purified blood is returned to the patient through the blood outlet 6 and blood output tube 7, while waste fluid is discharged through the dialysate outlet 5 and dialysate output port 9.

[0026] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A blood purification device for kidney dialysis, characterized in that: The device includes a filter structure (1), a dialysate inlet (2), a blood inlet (3), a blood input tube (4), a dialysate outlet (5), a blood outlet (6), a blood output tube (7), a dialysate inlet tube (8), and a dialysate outlet (9), wherein: the dialysate inlet (2) is fixedly installed at one end of the filter structure (1), and the blood inlet (3) is fixedly installed above the dialysate inlet (2), and the blood input tube (4) is fixedly installed above the blood inlet (3); the dialysate outlet (5) is fixedly installed at the other end of the filter structure (1), and the blood outlet (6) is fixedly installed above the dialysate outlet (5), and the blood output tube (7) is fixedly installed above the blood outlet (6); the dialysate inlet tube (8) is fixedly installed outside the dialysate inlet (2), and the dialysate outlet (9) is fixedly installed outside the blood outlet (6).

2. The blood purification device for kidney dialysis according to claim 1, wherein: The dialysate inlet (2) includes a sealing ring (21), an inlet pipe (22), a bacterial filter (23), and a stock solution inlet pipe (24). The sealing ring (21) is fixedly installed at one end of the filter structure (1), and the inlet pipe (22) is fixedly installed outside the sealing ring (21). The bacterial filter (23) is fixedly installed at one end of the inlet pipe (22), and the stock solution inlet pipe (24) is fixedly installed at one end of the bacterial filter (23) and connected to the stock solution inlet pipe (24).

3. The blood purification device for kidney dialysis according to claim 1, wherein: The blood inlet (3) includes a support cap (31), a connection port (32), a stabilizing bracket (33), and a pipe stabilizing seat (34). The support cap (31) is fixedly installed above the dialysate inlet (2). The connection port (32) is fixedly installed on the surface of the support cap (31) and connected to the blood inlet tube (4). The stabilizing bracket (33) is fixedly installed on the surface of the support cap (31), and the pipe stabilizing seat (34) is fixedly installed on its top. The pipe stabilizing seat (34) is slidably installed on the surface of the blood inlet tube (4).

4. The blood purification device for kidney dialysis according to claim 2, wherein: The sealing ring (21) inside the dialysate inlet (2) is a set of medical plastic rings, and the sealing ring (21) is connected to the filter structure (1) to form an integral unit; the outer side of the bacterial filter (23) is a circular plastic shell, and the inside of the bacterial filter (23) is a polyvinylidene fluoride filter element, and the filter element inside the bacterial filter (23) is provided with filter holes with a pore size of 0.2 micrometers.

5. The blood purification device for kidney dialysis according to claim 3, wherein: The overall structure of the blood inlet (3) is completely consistent with that of the blood outlet (6), and the support cover (31) inside the blood inlet (3) is a set of plastic covers. The stabilizing bracket (33) is a steel metal rod. The pipe stabilizing seat (34) is a set of silicone cylindrical structures. The stabilizing bracket (33) and the pipe stabilizing seat (34) are connected as one unit and can be removed from the surface of the support cover (31) for subsequent and repeated use.

6. The kidney dialysis blood purification device according to claim 1, wherein: The filter structure (1) is a U-shaped tubular structure, and the length of the pipe path of the filter structure (1) is twice its overall length.

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