Improved peritoneal dialysis tube

Abstract

This utility model discloses an improved peritoneal dialysis catheter, specifically relating to the field of medical device technology. It includes a main tube and a three-way valve fixedly installed at its first end. The three-way valve has a liquid cavity communicating with the main tube, and a dialysis end and a drain end communicating with the liquid cavity respectively. A valve block is movably disposed within the liquid cavity. This improved peritoneal dialysis catheter allows for compatibility with various types of dialysis catheters by selecting between the dialysis end, a first matching ring, and a second matching ring. The valve block seals the connection between the dialysis end and the liquid cavity to allow communication between the main tube and the drain end for drainage, and seals the connection between the drain end and the liquid cavity to allow communication between the main tube and the dialysis end for dialysate inflow. Flow sensors detect the flow rate of liquid from the liquid cavity to the drain end and the flow rate from the dialysis end to the liquid cavity, respectively, for analysis and to trigger alarms in conjunction with appropriate alarm devices.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an improved peritoneal dialysis tube. Background Technology

[0002] A peritoneal dialysis catheter is a medical device used for peritoneal dialysis. Peritoneal dialysis is a dialysis method used to treat chronic renal failure. It uses the peritoneum in the patient's abdomen as a filter membrane, and removes waste and excess fluid from the body by passing dialysate through the peritoneal cavity.

[0003] According to patent publication number CN221130567U, published on June 14, 2024, a peritoneal dialysis catheter is disclosed, comprising: a dialysis catheter body; two polyester sleeves located on the dialysis catheter body, the polyester sleeves dividing the dialysis catheter body into an intraperitoneal segment, a subcutaneous tunnel segment, and an extraperitoneal segment; the intraperitoneal segment includes a connecting segment connected to the subcutaneous tunnel segment and a dialysis segment connected to the connecting segment, the dialysis segment includes several spaced coarse tube segments and fine tube segments, the coarse tube segments and fine tube segments are connected to form a section, and a dialysis port is formed on the coarse tube segment.

[0004] Among the existing technologies, including the aforementioned patents, commonly used peritoneal dialysis catheters can be used with corresponding dialysis belts and drainage belts for dialysis operations. However, existing peritoneal dialysis catheters are not compatible with various drainage bags, limiting their flexibility in clinical applications. Nurses are busy and find it difficult to accurately monitor fluid output in real time during peritoneal dialysis. Currently, there is no effective mechanism to promptly determine whether the output volume has reached the intake volume, which may lead to potential risks during dialysis, such as fluid retention. Utility Model Content

[0005] The purpose of this invention is to provide an improved peritoneal dialysis catheter to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an improved peritoneal dialysis tube, comprising a main body and a three-way valve fixedly installed at its first end, wherein the three-way valve has a liquid cavity communicating with the main body and a dialysis end and a drain end communicating with the liquid cavity respectively, a valve block is movably arranged in the liquid cavity, a first matching ring is threadedly rotatably arranged on the dialysis end, and a second matching ring is threadedly rotatably arranged on the first matching ring, a cap is provided on the second matching ring, and a flow sensor is fixedly installed on the inner wall of the liquid cavity.

[0007] Preferably, the second end of the main body is provided with a bend, and the bend has a perforation.

[0008] Preferably, the three-way valve has a slider that is slidably mounted on it, and a slide rod is fixedly mounted on the slider. A main spring is sleeved on the outer wall of the slide rod, and an iron plate is fixedly mounted on the bottom end of the slide rod. An electromagnet is fixedly mounted inside the three-way valve on one side of the iron plate.

[0009] Preferably, an alarm unit is fixedly installed inside the three-way valve, and a cover plate is slidably disposed on the three-way valve, with the cover plate being movably disposed on one side of the flow sensor.

[0010] Preferably, the cap is a rubber block.

[0011] In the above technical solution, the improved peritoneal dialysis catheter provided by this utility model has the following beneficial effects: by utilizing the first matching ring on the dialysis end and the second matching ring on the first matching ring, the dialysis end, the first matching ring and the second matching ring can be selected to facilitate the insertion of the dialysis catheter and adapt to various types of dialysis catheters. By inserting the drainage tube into the drain end, and then sealing the connection between the dialysis end and the fluid chamber through the valve block, the main body and the drain end can be connected for drainage and drainage operations. By sealing the connection between the drain end and the fluid chamber through the valve block, the main body and the dialysis end can be connected for dialysate inlet operations. The flow sensor can detect the amount of fluid flowing from the fluid chamber to the drain end and the amount of fluid flowing from the dialysis end to the fluid chamber, respectively, so as to facilitate analysis and alarm in conjunction with the corresponding alarm device. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0013] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0014] Figure 2 This is a schematic diagram of the overall cross-sectional structure provided for an embodiment of the present utility model;

[0015] Figure 3 This is an enlarged structural diagram of point A provided in an embodiment of the present utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. Three-way valve; 2. Main pipe body; 3. Baffle; 4. Cover; 5. Sliding block; 11. Dialysis end; 12. Liquid chamber; 13. Drain end; 14. First matching ring; 15. Second matching ring; 21. Bend; 22. Perforation; 31. Flow sensor; 32. Alarm unit; 51. Valve block; 52. Slide rod; 53. Iron plate; 54. Main spring; 55. Electromagnet. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-3 As shown, an improved peritoneal dialysis catheter includes a main body 2 and a three-way valve 1 fixedly installed at its first end. The three-way valve 1 has a liquid chamber 12 communicating with the main body 2, and a dialysis end 11 and a drain end 13 communicating with the liquid chamber 12 respectively. A valve block 51 is movably arranged in the liquid chamber 12. A first matching ring 14 is threadedly rotatably arranged on the dialysis end 11, and a second matching ring 15 is threadedly rotatably arranged on the first matching ring 14. A cap 4 is provided on the second matching ring 15. A flow sensor 31 is fixedly installed on the inner wall of the liquid chamber 12. By utilizing the first matching ring 14 and the second matching ring 15 on the dialysis end 11, a selection can be made between the dialysis end 11, the first matching ring 14, and the second matching ring 15 to allow the dialysis tube to be inserted and to accommodate various types of dialysis tubes. By inserting the drainage tube into the drain end 13, and then sealing the connection between the dialysis end 11 and the liquid chamber 12 through the valve block 51, the main body 2 and the drain end 13 can be connected for drainage. Similarly, by sealing the connection between the drain end 13 and the liquid chamber 12 through the valve block 51, the main body 2 and the dialysis end 11 can be connected for dialysate inlet. The flow sensor 31 can detect the amount of liquid flowing from the liquid chamber 12 to the drain end 13 and the amount of liquid flowing from the dialysis end 11 to the liquid chamber 12, respectively, for analysis and to trigger an alarm in conjunction with the corresponding alarm device.

[0020] Specifically, the flow sensor 31 can be a Hall effect flow meter, and the information collected by the Hall effect flow meter can be processed in conjunction with a corresponding microcontroller or computer. When there is a large difference between the outflow and inflow, an alarm will be sounded in conjunction with a buzzer to remind the user.

[0021] As a further technical solution provided by this utility model, the second end of the main body 2 is provided with a bend 21, and a through hole 22 is provided on the bend 21.

[0022] Specifically, such as Figure 1As shown, a curved tube 21 and a perforation 22 thereon are used to allow liquid to enter and exit along the perforation 22. The curved tube 21 is a silicone tube with a certain degree of elasticity to adapt to the abdominal cavity environment.

[0023] Furthermore, a slider 5 is slidably mounted on the three-way valve 1, and a slide rod 52 is fixedly mounted on the slider 5. A main spring 54 is sleeved on the outer wall of the slide rod 52, and an iron plate 53 is fixedly mounted on the bottom end of the slide rod 52. An electromagnet 55 is fixedly mounted inside the three-way valve 1 on one side of the iron plate 53.

[0024] Specifically, the two ends of the main spring 54 are fixedly installed on the three-way valve 1 and the iron plate 53, respectively. In the default state, the electromagnet 55 is activated to magnetically attract the iron plate 53. At this time, the main spring 54 stores force and deforms, simultaneously driving the slider 5 to move upward. Figure 3 As shown, valve block 51 is fixedly installed on slider 5. In the default state, electromagnet 55 magnetically attracts iron plate 53, and valve block 51 blocks the connection between dialysis end 11 and liquid chamber 12 to facilitate the connection between main body 2 and drain end 13 for drainage operation. When electromagnet 55 closes and stops magnetic attraction, main spring 54 releases its stored force to push iron plate 53 downward, simultaneously driving valve block 51 on slider 5 downward. At this time, valve block 51 blocks the connection between drain end 13 and liquid chamber 12 to facilitate the connection between main body 2 and dialysis end 11 for dialysate infusion operation.

[0025] Furthermore, an alarm unit 32 is fixedly installed inside the three-way valve 1, and a cover plate 3 is slidably disposed on the three-way valve 1, and the cover plate 3 is movably disposed on one side of the flow sensor 31.

[0026] Specifically, such as Figure 3As shown, the alarm unit 32 includes an information acquisition unit electrically connected to the flow sensor 31 and a switch for controlling the magnetic attraction of the electromagnet 55, as well as a battery for power supply. The information acquisition unit can use a microcontroller or chip to process the information collected by the flow sensor 31. In the default state, the electromagnet 55 magnetically attracts the iron plate 53. At this time, the valve block 51 blocks the connection between the dialysis end 11 and the liquid chamber 12 so that the main tube body 2 and the drain end 13 can be connected to perform the drainage operation. Then, the waste fluid in the patient's body is drained out along the drain end 13. At this time, the flow sensor 31 collects the flow signal from the liquid chamber 12 to the drain end 13. When there is no liquid flow in the liquid chamber 12, the information acquisition unit in the alarm unit 32 is used to monitor, collect and process the information of the flow sensor 31. Then, the electromagnet 55 is turned off by controlling it. At this time, the electromagnet 55 stops magnetic attraction, the main spring 54 releases its stored force to push the iron plate 53 down, and at the same time, it drives the valve block 51 on the slider 5 to move down. At this time, the valve block 51 blocks the connection between the drain end 13 and the liquid chamber 12 so that the main tube 2 and the dialysis end 11 can be connected to perform the operation of dialysate infusion. At this point, the flow sensor 31 is used again to detect the amount of fluid flowing from the dialysis end 11 to the fluid chamber 12. Then, by comparing the amount of fluid flowing from the fluid chamber 12 to the drain end 13 with the amount of fluid flowing from the dialysis end 11 to the fluid chamber 12, when the amount of fluid flowing from the dialysis end 11 to the fluid chamber 12 is greater than the amount of fluid flowing from the fluid chamber 12 to the drain end 13, the buzzer in the alarm unit 32 will sound an alarm to remind medical staff to check.

[0027] The alarm can take various forms, such as light alarms or remote alarms connected to the hospital monitoring system. For example, the information collected by the information collection unit can be transmitted to the computer at the nurse station for display.

[0028] Furthermore, the cap 4 is made of rubber.

[0029] Working principle: By utilizing the first matching ring 14 and the second matching ring 15 on the dialysis end 11, the dialysis end 11, the first matching ring 14 and the second matching ring 15 can be selected to allow the dialysis tube to be inserted and can be adapted to various types of dialysis tubes. The drainage tube is inserted into the drain end 13 to drain the fluid discharged from the body. A drainage bag is fixedly installed on the drainage tube, and a dialysis belt is fixedly installed on the dialysis tube.

[0030] After the curved tube 21 on the main tube 2 is placed into the patient's abdominal cavity and fixed, in the default state, the electromagnet 55 magnetically attracts the iron plate 53. At this time, the valve block 51 blocks the connection between the dialysis end 11 and the fluid chamber 12 to allow the main tube 2 and the drain end 13 to connect for drainage. Then, the waste fluid in the patient's body is drained out along the drain end 13. At this time, the flow sensor 31 collects the flow signal from the fluid chamber 12 to the drain end 13. When there is no liquid flow in the fluid chamber 12, the information acquisition unit in the alarm unit 32 monitors, collects and processes the information of the flow sensor 31, and then controls the electromagnet 55 to close. At this time, the electromagnet 55 stops magnetic attraction, the main spring 54 releases its stored force to push the iron plate 53 down, and at the same time, it drives the valve block 51 on the slider 5 to move down. At this time, the valve block 51 blocks the connection between the drain end 13 and the fluid chamber 12 to allow the main tube 2 and the dialysis end 11 to connect for dialysate infusion. At this point, the flow sensor 31 is used again to detect the amount of fluid flowing from the dialysis end 11 to the fluid chamber 12. Then, by comparing the amount of fluid flowing from the fluid chamber 12 to the drain end 13 with the amount of fluid flowing from the dialysis end 11 to the fluid chamber 12, when the amount of fluid flowing from the dialysis end 11 to the fluid chamber 12 is greater than the amount of fluid flowing from the fluid chamber 12 to the drain end 13, the buzzer in the alarm unit 32 will sound an alarm to remind medical staff to check.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An improved peritoneal dialysis catheter, characterized in that, The device includes a main body (2) and a three-way valve (1) fixedly installed at its first end. The three-way valve (1) has a liquid chamber (12) communicating with the main body (2) and a dialysis end (11) and a drain end (13) communicating with the liquid chamber (12) respectively. A valve block (51) is movably arranged in the liquid chamber (12). A first matching ring (14) is threadedly arranged on the dialysis end (11), and a second matching ring (15) is threadedly arranged on the first matching ring (14). A cap (4) is provided on the second matching ring (15). A flow sensor (31) is fixedly installed on the inner wall of the liquid chamber (12).

2. The improved peritoneal dialysis catheter according to claim 1, characterized in that, The second end of the main body (2) is provided with a bend (21), and a through hole (22) is provided on the bend (21).

3. The improved peritoneal dialysis catheter according to claim 1, characterized in that, A slider (5) is slidably mounted on the three-way valve (1), and a slide rod (52) is fixedly mounted on the slider (5). A main spring (54) is sleeved on the outer wall of the slide rod (52), and an iron plate (53) is fixedly mounted on the bottom end of the slide rod (52). An electromagnet (55) is fixedly mounted inside the three-way valve (1) on one side of the iron plate (53).

4. An improved peritoneal dialysis catheter according to claim 1, characterized in that, An alarm unit (32) is fixedly installed inside the three-way valve (1), and a cover plate (3) is slidably disposed on the three-way valve (1), and the cover plate (3) is movably disposed on one side of the flow sensor (31).

5. An improved peritoneal dialysis catheter according to claim 1, characterized in that, The cover (4) is a rubber block.

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