An anti-pressure device for a hemodialysis catheter

Abstract

The present application belongs to the technical field of dialysis auxiliary equipment, and provides a pressure preventing device for a hemodialysis catheter. The pressure preventing device comprises a mounting main pipe and a compensation pressure piece. The mounting main pipe is detachably mounted on the hemodialysis catheter and extends into the hemodialysis catheter. The compensation pressure piece is mounted on the mounting main pipe and communicates with the mounting main pipe. The compensation pressure piece comprises a pressure flow assembly and an elastic piece. The pressure flow assembly is mounted in the mounting main pipe. The pressure flow assembly comprises a fixed ring plate and a mixing cylinder. The fixed ring plate is fixedly mounted on the inner wall of the mounting main pipe and is close to the direction of the hemodialysis catheter. One end of the elastic piece is fixedly mounted on the fixed ring plate, and the other end of the elastic piece is fixedly mounted on the mixing cylinder. The pressure preventing device for the hemodialysis catheter can realize the stability of blood entering the dialysis tube.

Description

Technical Field

[0001] This invention relates to the field of dialysis support equipment technology, and specifically to a pressure relief device for hemodialysis catheters. Background Technology

[0002] During hemodialysis, the blood flow in the body usually has a certain pressure. As a result, when connected to the dialysis tubing, the pressure can easily become too high, reducing the dialysis capacity of the tubing. Therefore, in order to solve the problem of unstable pressure.

[0003] We propose a pressure relief device for hemodialysis catheters that can effectively solve pressure instability and improve the stability of blood entering the dialysis catheter. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pressure relief device for hemodialysis catheters to ensure stability when blood enters the dialysis catheter.

[0005] An anti-pressure device for a hemodialysis catheter according to the present invention includes: a main installation tube, which is detachably installed on the hemodialysis catheter and extends into the hemodialysis catheter; and a pressure compensation component, which is installed on the main installation tube and communicates with it; the pressure compensation component includes a flow-pressure assembly and an elastic element; the flow-pressure assembly is installed inside the main installation tube; the flow-pressure assembly includes a fixing ring plate and a mixing cylinder; the fixing ring plate is fixedly installed on the inner wall of the main installation tube and close to the direction of the hemodialysis catheter; one end of the elastic element is fixedly installed on the fixing ring plate, and the other end of the elastic element is fixedly installed on the mixing cylinder; the mixing cylinder has a bottom hydraulic plate and a sieve hole; wherein the bottom hydraulic plate is disposed at the bottom of the mixing cylinder and has a flow hole at its center; the sieve hole is provided in multiple locations and is evenly distributed on the cylinder wall of the mixing cylinder.

[0006] Furthermore, it also includes an adjustment mechanism, which comprises an adjustment tube and a reducing element; one end of the adjustment tube is fixedly mounted on the main installation tube; the reducing element is disposed on the inner wall of the adjustment tube. In practical applications, the purpose of this design is to change the pressure of blood entering the hemodialysis catheter by altering the volume; in this way, a stable pressure can be maintained when blood enters the hemodialysis catheter, thus facilitating stable dialysis of the aforementioned hemodialysis catheter, improving its stability, and consequently extending its service life.

[0007] Furthermore, the reducing component includes a sliding plug, a cam, and a motor; the adjusting tube has an installation side section; the motor is fixedly installed outside the installation side section, and the motor's shaft extends into the installation side section; the cam is rotatably installed inside the installation side section and fixedly installed on the motor's shaft; the sliding plug is connected to the cam. In actual design, to achieve the above-mentioned pressure changing purpose, the volume-changing design is adopted, specifically the distance of the sliding plug within the adjusting tube, thereby changing the volume. This is achieved by the motor driving the cam to rotate, and the cam driving the sliding plug to move up and down; thus, the volume is changed. However, when blood pressure needs to be lowered, the sliding plug moves upward, increasing the volume, thereby increasing the blood flow and lowering the blood pressure; when pressure needs to be increased, the sliding plug moves downward, reducing the distance between the sliding plug and the adjusting tube, thereby reducing the space volume, thus reducing the blood flow, thereby increasing the blood pressure, and ultimately increasing the pressure entering the hemodialysis catheter, thus meeting the needs of low-pressure patients.

[0008] Furthermore, the sliding plug has a central hole and a side connecting section, and the sliding plug is connected to the cam via the side connecting section. In actual design, the central hole is to facilitate blood flow; while the aforementioned side connecting section is to facilitate connection with the cam, enabling the sliding plug to move up and down under the rotation of the cam.

[0009] Furthermore, it also includes an extension tube; one end of the extension tube is located inside the other end of the adjustment tube and is connected to the central hole of the sliding plug; the other end of the extension tube extends into and connects to the hemodialysis catheter. In practical applications, the purpose of this design is to achieve connection with the catheter inside the hemodialysis machine.

[0010] Furthermore, it also includes a pressure relief valve, which is installed on the extension tube and close to the regulating tube. In practical application, this pressure relief valve is a one-way switch, which is manually opened when the aforementioned sliding plug moves; in this way, the airflow pressure generated during the movement of the sliding plug can flow out from the side closer to the hemodialysis, preventing it from entering.

[0011] As can be seen from the above technical solution, the beneficial effects of the anti-pressure device for hemodialysis catheters provided by the present invention are as follows:

[0012] In practice, the main installation tube serves as a connector, enabling the installation and fixation of the device. The pressure compensation components, including a flow-compensating assembly and an elastic element, are used to compensate for pressure and lower blood pressure. The elastic element is made of rubber with an elastic sleeve. This allows the mixing cylinder to reciprocate up and down, reducing the impact of fluid pressure, maintaining stable pressure, and preventing sudden increases or decreases in blood flow through the dialysis catheter due to blood pressure fluctuations, thus affecting the actual service life of the dialysis catheter.

[0013] Simultaneously, the fixed ring plate fixes the mixing cylinder within a certain range, thus enabling mixed flow after blood enters. This facilitates subsequent processing of the dialysis tubing. Furthermore, the use of a sieve facilitates initial mixed flow, allowing blood to pass through the surface sieve holes, creating multiple turbulent flows. These multiple turbulent flows facilitate stable dialysis using the dialysis tubing, avoiding momentary excess or increase in dialysis capacity due to stable turbulent flow. This achieves stable turbulent flow, which in turn facilitates dialysis. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the main structure of a pressure relief device for a hemodialysis catheter according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of blood flow in a pressure relief device for a hemodialysis catheter according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram illustrating the operation of an important component in a pressure relief device for a hemodialysis catheter, according to an embodiment of the present invention.

[0018] Figure label:

[0019] Installation main pipe 1, pressure compensation component 2, flow compression assembly 21, fixed ring plate 211, mixing cylinder 212, bottom hydraulic plate 201, sieve hole 202, flow hole 203, elastic component 22, adjustment mechanism 3, adjustment pipe 31, diameter changing component 32, sliding plug 321, cam 322, motor 323, center hole 301, side connecting section 302, extension pipe 4, pressure relief valve 5. Detailed Implementation

[0020] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0021] The basic implementation examples are as follows: Figures 1 to 3 As shown:

[0022] Example 1:

[0023] like Figures 1-3 As shown in the figure, this embodiment provides a pressure relief device for a hemodialysis catheter, which can ensure the stability of blood entering the dialysis catheter.

[0024] An anti-pressure device for a hemodialysis catheter according to the present invention includes: a main mounting tube 1, which is detachably mounted on the hemodialysis catheter and extends into the hemodialysis catheter; and a pressure compensation component 2, which is mounted on the main mounting tube 1 and communicates with the main mounting tube 1; the pressure compensation component 2 includes a flow-pressure assembly 21 and an elastic component 22; the flow-pressure assembly 21 is mounted inside the main mounting tube 1; the flow-pressure assembly 21 includes a fixing ring plate 211 and a mixing cylinder 212; the fixing ring plate 211 is fixedly mounted on... The installation tube is located on the inner wall of the main tube, near the direction of the hemodialysis catheter; one end of the elastic element 22 is fixedly installed on the fixing ring plate 211, and the other end of the elastic element 22 is fixedly installed on the mixing cylinder 212; the mixing cylinder 212 has a bottom hydraulic plate 201 and a sieve hole 202; wherein the bottom hydraulic plate 201 is located at the bottom of the mixing cylinder 212, and a liquid flow hole 203 is also provided at the center of the bottom hydraulic plate 201; the sieve hole 202 is provided in multiple locations and is evenly distributed on the cylinder wall of the mixing cylinder 212. In practical operation, the main installation tube 1 serves as a connector, enabling the installation and fixation of the device. The pressure compensation component 2, used to compensate for pressure and lower blood pressure, includes a flow-compensating assembly 21 and an elastic component 22. The elastic component 22 is made of rubber with an elastic sleeve. This allows the mixing cylinder 212 to reciprocate up and down, reducing the impact of fluid pressure, maintaining stable pressure, and preventing sudden increases or decreases in blood flow through the dialysis catheter due to blood pressure fluctuations, thus affecting the actual service life of the dialysis catheter. Simultaneously, the fixing ring plate 211 is used to fix the mixing cylinder 212 within a certain range, thus enabling the blood to form mixed flow after entering. This facilitates the subsequent processing of the dialysis tubing. Furthermore, the use of the sieve holes 202 facilitates initial mixed flow, with the blood passing through the sieve holes 202 on the surface. This creates multiple turbulent flows, which facilitates stable dialysis using the dialysis tubing and avoids instantaneous overcapacity or instantaneous increase in dialysis capacity caused by stable turbulent flow. This achieves stable turbulent flow with the above-mentioned functions, and turbulent flow facilitates dialysis.

[0025] To further achieve pressure regulation, this embodiment also includes an adjustment mechanism 3, which includes an adjustment tube 31 and a reducing element 32. One end of the adjustment tube 31 is fixedly installed on the main installation tube 1; the reducing element 32 is disposed on the inner wall of the adjustment tube 31. In practical applications, the purpose of this design is to change the pressure of blood entering the hemodialysis catheter by changing the volume; in this way, a stable pressure can be maintained when blood enters the hemodialysis catheter, thus facilitating stable dialysis of the hemodialysis catheter, improving its stability, and consequently extending its service life.

[0026] In this embodiment, to achieve adjustment for both high and low pressure conditions, the variable diameter component 32 includes a sliding plug 321, a cam 322, and a motor 323; the adjusting tube 31 has an installation side section; the motor 323 is fixedly installed outside the installation side section, and the rotating shaft of the motor 323 extends into the installation side section; the cam 322 is rotatably installed inside the installation side section and fixedly installed on the rotating shaft of the motor 323; the sliding plug 321 is connected to the cam 322. In the actual design, to achieve the aforementioned pressure-changing purpose, the volume-changing design is adopted. Specifically, the distance of the sliding plug 321 within the regulating tube 31 is changed, thereby altering the volume. This is achieved by the motor 323 driving the cam 322 to rotate, which in turn drives the sliding plug 321 to move up and down. This changes the volume. When blood pressure needs to be lowered, the sliding plug 321 moves upward, increasing the volume and thus increasing the blood flow, resulting in lower blood pressure. When pressure needs to be increased, the sliding plug 321 moves downward, reducing the distance between the sliding plug 321 and the regulating tube 31, thereby reducing the space volume and the blood flow. This increases the blood pressure, ultimately increasing the pressure entering the hemodialysis catheter, thus meeting the needs of low-pressure patients.

[0027] In this embodiment, the sliding plug 321 has a central hole 301 and a side connecting section 302. The sliding plug 321 is connected to the cam 322 via the side connecting section 302. In actual design, the central hole 301 is for facilitating blood flow; while the aforementioned side connecting section 302 is for facilitating connection with the cam 322, enabling the sliding plug 321 to move up and down under the rotation of the cam 322.

[0028] In this embodiment, an extension tube 4 is included for easy connection; one end of the extension tube 4 is located inside the other end of the adjusting tube 31 and is connected to the central hole 301 of the sliding plug 321; the other end of the extension tube 4 extends into and connects to the hemodialysis catheter. In practical applications, the purpose of this design is to achieve connection with the catheter inside the hemodialysis machine.

[0029] To reduce airflow accumulation during pressure regulation, this embodiment also includes a pressure relief valve 5, which is disposed on the extension tube 4 and close to the regulating tube 31. In practical application, the pressure relief valve 5 is a one-way switch, which is manually opened when the sliding plug 321 moves. In this way, the airflow pressure generated during the movement of the sliding plug 321 can flow out from the side closer to the hemodialysis, preventing it from entering.

[0030] In summary, this pressure relief device for hemodialysis catheters is not only reasonably designed and easy to operate, but also capable of pressure regulation and handling both low and high pressure conditions. Furthermore, it provides kinetic energy to the blood to be filtered and dialyzed, facilitating the accumulation of waste products in the blood. Therefore, this device is suitable for industry-wide promotion.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A pressure relief device for hemodialysis catheters, characterized in that, include: Installation main tube, which is detachably installed on the hemodialysis catheter and extends into the hemodialysis catheter; and A pressure compensation component is installed in and communicates with the main installation pipe; the pressure compensation component includes a flow-pressure assembly and an elastic element; the flow-pressure assembly is installed inside the main installation pipe; The pressure flow assembly includes a fixed ring plate and a mixing cylinder; the fixed ring plate is fixedly installed on the inner wall of the main installation tube, and is close to the direction of the hemodialysis catheter; one end of the elastic element is fixedly installed on the fixed ring plate, and the other end of the elastic element is fixedly installed on the mixing cylinder; The mixing cylinder has a bottom hydraulic plate and sieve holes; wherein the bottom hydraulic plate is disposed at the bottom of the mixing cylinder and has a liquid flow hole at the center of the bottom hydraulic plate; the sieve holes are provided in multiple locations and are evenly distributed on the cylinder wall of the mixing cylinder; It also includes an adjustment mechanism, which comprises an adjustment tube and a reducing element; one end of the adjustment tube is fixedly installed on the main installation tube; the reducing element is disposed on the inner wall of the adjustment tube.

2. The anti-pressure device for a hemodialysis catheter according to claim 1, characterized in that, The reducing component includes a sliding plug, a cam, and a motor; the adjusting tube has a mounting side section; the motor is fixedly mounted outside the mounting side section, and the motor's shaft extends into the mounting side section; the cam is rotatably mounted inside the mounting side section and fixedly mounted on the motor's shaft; the sliding plug is connected to the cam.

3. A pressure relief device for a hemodialysis catheter according to claim 2, characterized in that, The sliding plug has a central hole and a side connecting section, and the sliding plug is connected to the cam drive through the side connecting section.

4. A pressure relief device for a hemodialysis catheter according to claim 2, characterized in that, It also includes an extension tube; one end of the extension tube is located inside the other end of the adjustment tube and is connected to the central hole of the sliding plug; the other end of the extension tube extends into and connects to the hemodialysis catheter.

5. A pressure relief device for a hemodialysis catheter according to claim 4, characterized in that, It also includes a pressure relief valve, which is disposed on the extension pipe and close to the regulating pipe.

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