A peritoneal dialysis tube applied to internal nephrology dialysis

Abstract

This invention provides a peritoneal dialysis catheter for use in nephrology dialysis, belonging to the field of peritoneal dialysis catheter technology. It includes an outer tube, a plug, and a first catheter. The front end of the outer tube has a slot, and a retaining ring is movably connected inside the slot. A plug is fixedly connected to the tail end of the plug, and the plug is adapted to the slot. Several limiting components are provided inside the front end of the outer tube, and each limiting component is connected to the protruding end of the plug. An adjusting ring is movably connected to the outside of the outer tube, and the adjusting ring is connected to the limiting components. The front end of the first catheter is adapted to the front end of the plug. This invention, through the limiting components, allows the retaining ring and the retaining ring to reset, thereby pushing the plug out of the slot. This facilitates plug replacement without contact, avoids contact between waste fluid and limbs, and allows for rapid plug replacement. It also helps reduce waste fluid retention on the outside of the plug, helps maintain the cleanliness of the outer tube end, and prevents bacterial accumulation at the outer tube end.

Description

Technical Field

[0001] This invention relates to the field of peritoneal dialysis catheter technology, and more specifically, to a peritoneal dialysis catheter used in nephrology dialysis. Background Technology

[0002] Peritoneal dialysis is one of the important renal replacement therapies for patients with end-stage renal disease. Its principle is to use the patient's own peritoneum as a semipermeable membrane, infusing dialysate into the peritoneal cavity to remove metabolic waste, toxins, and excess water, thereby maintaining the body's internal environment. Compared to hemodialysis, peritoneal dialysis has advantages such as ease of operation, stable hemodynamics, and greater patient freedom of movement, making it particularly suitable for home dialysis. The peritoneal dialysis catheter, as the core device of this treatment, needs to be left in the patient's peritoneal cavity long-term, and the dialysate is circulated and exchanged through an external tubing system. Its structural design directly affects dialysis efficiency, operational safety, and infection control.

[0003] In existing technologies, the outer tube and disposable plug are connected by a conventional plug-and-play method, which requires manual operation during replacement. This is not only cumbersome but also prone to waste liquid residue or leakage, increasing the risk of contamination and infection. In addition, the dialysate injection channel and waste liquid discharge channel in traditional pipeline systems intersect, which may cause waste liquid backflow and contamination, affecting the dialysate exchange efficiency. Summary of the Invention

[0004] In view of the problem that the dialysate injection channel and waste liquid discharge channel in the existing pipeline system are intersecting, which may cause waste liquid backflow and contamination, and affect the dialysate exchange efficiency, the purpose of this invention is to provide a peritoneal dialysis catheter for use in nephrology dialysis.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A peritoneal dialysis catheter for use in nephrology dialysis includes an outer tube, a plug, and a first catheter. The front end of the outer tube has a slot, and a retaining ring is movably connected inside the slot. A plug is fixedly connected to the tail end of the plug, and the plug is adapted to the slot. Several limiting components are provided inside the front end of the outer tube, and each limiting component is connected to the protruding end of the plug. An adjusting ring is movably connected to the outer side of the outer tube and is connected to the limiting components. The front end of the first catheter is adapted to the front end of the plug. A second catheter is fixedly connected to the outer side of the first catheter. A guide tube is movably connected inside the first catheter. A control tube is movably connected inside the first catheter and is fixedly connected to the guide tube. A switching component is provided on the first catheter, and the switching component is movably connected to the control tube.

[0007] Optionally, the limiting assembly includes a rotating plate, a limiting block, a folding spring, a traction rope, and a connecting block. The rotating plate, the limiting block, the folding spring, and the traction rope are all symmetrically arranged. The limiting block is fixedly connected to one side of the rotating plate, and the folding spring is fixedly connected to the other side of the rotating plate. A through hole is provided on the folding spring, and the traction rope passes through the through hole. One end of the traction rope is fixedly connected to the back side of the rotating plate, and the end of the traction rope away from the rotating plate is fixedly connected to the connecting block.

[0008] Optionally, the front end of the outer tube is fixedly connected to several receiving blocks, the limiting block, the folding spring and the traction rope are all located inside the receiving block, and the rotating plate is movably connected to the end of the receiving block through a rotating shaft. The multiple protrusions of the insertion block are provided with limiting grooves on both sides, and the limiting block is adapted to the limiting grooves respectively.

[0009] Optionally, a return spring is fixedly connected inside the slot, and a collar is fixedly connected to the free end of the return spring, and the collar is fixedly connected to the retaining ring.

[0010] Optionally, the outer tube is threaded on its outer side, and a control ring is movably connected to the outer tube via the thread. The control ring is rotatably connected to the adjustment ring, and the end of the connecting block away from the traction rope is fixedly connected to the end of the adjustment ring.

[0011] Optionally, the switching assembly includes a drive cylinder, a drive pin, and a compression spring. A drive groove is provided on the outer side of the control tube. The drive pin is fixedly connected to the inner side of the drive cylinder and is movably engaged with the drive groove. A first annular groove is provided at one end of the drive cylinder, and the end of the first guide tube is movably connected to the inside of the first annular groove. A second annular groove is provided at the other end of the drive cylinder, and the compression spring is fixedly connected to the inside of the second annular groove.

[0012] Optionally, one end of the drive cylinder is movably connected to a drain pipe via a second annular groove, and several connecting strips are fixedly connected between the second conduit and the drain pipe, with the connecting strips arranged in a circular array.

[0013] Optionally, the connecting strip passes through the interior of the drive cylinder and is movably connected to the drive cylinder. The free end of the compression spring is fixedly connected to the end of the drain pipe. The drain pipe has a thread on its outer side and a push ring is movably connected to the drain pipe via the thread. The end of the push ring abuts against the end of the drive cylinder.

[0014] Optionally, the guide tube has a first channel, through which the first conduit is connected to the sewage pipe, and the guide tube has a second channel, through which the first conduit is connected to the second conduit.

[0015] Optionally, a sealing block is fixedly connected inside the first conduit, the cross-sectional area of ​​the sealing block being larger than the cross-sectional area of ​​the inlet end of the first channel, and the cross-sectional area of ​​the seal being larger than the cross-sectional area of ​​the inlet end of the second channel.

[0016] Compared with the prior art, the technical solution provided by this invention has at least the following beneficial effects:

[0017] In the above solution, the limiting component is set to reset the gasket and retaining ring, thereby pushing the plug out of the slot. This facilitates the replacement of the plug without contact, avoids contact between waste liquid and limbs, and allows for quick plug replacement. It also helps reduce the amount of waste liquid remaining on the outside of the plug, helps maintain the cleanliness of the outer tube end, and prevents the accumulation of bacteria at the outer tube end.

[0018] Through the set switching component, the drive cylinder drives the drive pin to move synchronously. Due to the active cooperation between the drive pin and the drive groove, the control tube rotates 90 degrees inside the first guide tube, thereby causing the guide cylinder to rotate 90 degrees synchronously. This facilitates the blocking of the inlet end of the first or second channel by the stop block, so that the operation of waste liquid discharge and dialysate re-injection is more independent, avoiding backflow after waste liquid discharge, and helping to reduce the convergence of waste liquid inside the drain pipe at the intersection of the first and second guide tubes. Attached Figure Description

[0019] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the outer tube explosion structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the split structure of the outer tube of the present invention;

[0024] Figure 5 This is a schematic diagram of the limiting component structure of the present invention;

[0025] Figure 6 for Figure 5 Another perspective structural diagram;

[0026] Figure 7 This is a schematic diagram of the first conduit explosion structure of the present invention;

[0027] Figure 8These are schematic diagrams of the guide tube of the present invention in different states;

[0028] Figure 9 This is a schematic diagram of the structure of the sewage pipe and its connectors according to the present invention.

[0029] [Figure Labels]

[0030] 1. Outer tube; 2. Plug; 3. First conduit; 4. Slot; 5. Retaining ring; 6. Insert block;

[0031] 7. Limiting assembly; 701. Rotary plate; 702. Limiting block; 703. Folding spring; 704. Traction rope; 705. Connecting block;

[0032] 8. Adjusting ring; 9. Second conduit; 10. Guide tube; 11. Control tube;

[0033] 12. Switching component; 121. Drive cylinder; 122. Drive pin; 123. Compression spring;

[0034] 13. Perforation; 14. Receiving block; 15. Limiting groove; 16. Return spring; 17. Collar; 18. Control ring; 19. First ring groove; 20. Second ring groove; 21. Drain pipe; 22. Connecting strip; 23. Push ring; 24. First channel; 25. Second channel; 26. Sealing block; 27. Drive groove.

[0035] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0037] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0038] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0039] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0040] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0041] like Figures 1 to 9 As shown, this embodiment of the invention provides a peritoneal dialysis catheter for nephrology dialysis, including an outer tube 1, a plug 2, and a first catheter 3. A fixing ring is fixedly connected to the front end of the first catheter 3, facilitating a tight connection between the first catheter 3 and the plug 2, improving operational convenience. Before use, an iodine cap is fitted onto the outside of the plug 2. Both the plug 2 and the iodine cap are disposable; after use, they need to be replaced and installed on the front end of the outer tube 1. A slot 4 is provided at the front end of the outer tube 1, and a retaining ring 5 is movably connected inside the slot 4. A plug block 6 is fixedly connected to the tail end of the plug 2, and the plug block 6 is adapted to the slot 4. The slot 4 has four limiting parts, each adapted to one of the four protruding ends of the plug block 6. Several limiting components 7 are provided inside the front end of the outer tube 1, and each limiting component 7 is connected to one of the protruding ends of the plug block 6. An adjusting ring 8 is movably connected to the outside of the outer tube 1, and the adjusting ring 8 is connected to the limiting components 7.

[0042] The front end of the first catheter 3 is adapted to the front end of the plug 2. The front end of the first catheter 3 is usually adapted to the front end of the plug 2 by a threaded rotation, which is an existing connection method. Generally, the outer tube 1 is directly fitted with an iodine cap on the outside of its front end. After connecting to the end of the peritoneal dialysis catheter, the iodine cap is directly replaced. However, there will still be residual waste fluid at the end of the outer tube 1, which may cause waste fluid leakage. The second catheter 9 is fixedly connected to the outside of the first catheter 3. The guide tube 10 is movably connected inside the first catheter 3. The control tube 11 is movably connected inside the first catheter 3, and the control tube 11 is fixedly connected to the guide tube 10. A switching component 12 is provided on the first catheter 3. The switching component 12 is used to change the angle of the guide tube 10, thereby changing the flow direction of the liquid in the peritoneal dialysis catheter. The switching component 12 is movably connected to the control tube 11. The outer tube 1 is connected to the inner tube through a connector. The inner tube is directly connected to the patient's abdomen. The outer tube 1 is used to connect to a disposable peritoneal dialysis catheter.

[0043] like Figure 1 , Figures 3 to 6 As shown, the limiting component 7 includes a rotating plate 701, a limiting block 702, a folding spring 703, a traction rope 704, and a connecting block 705. The rotating plate 701, the limiting block 702, the folding spring 703, and the traction rope 704 are all symmetrically arranged. The limiting block 702 is fixedly connected to one side of the rotating plate 701, and the folding spring 703 is fixedly connected to the other side of the rotating plate 701. A through hole 13 is provided on the folding spring 703, and the traction rope 704 passes through the through hole 13. The folding spring 703 is arc-shaped and has a traction through-hole 13, facilitating its folding deformation. Simultaneously, it can control the rotation of the rotating plate 701 via the traction rope 704. One end of the traction rope 704 is fixedly connected to the back side of the rotating plate 701, and the end of the traction rope 704 away from the rotating plate 701 is fixedly connected to the connecting block 705. Several receiving blocks 14 are fixedly connected to the front end of the outer tube 1. There are four receiving blocks 14, and each receiving block 14... Two limiting blocks 702 are provided. The limiting blocks 702, the folding spring 703, and the traction rope 704 are all located inside the receiving block 14. The rotating plate 701 is movably connected to the end of the receiving block 14 through a rotating shaft. The multiple protrusions of the insertion block 6 are provided with limiting grooves 15 on both sides. The limiting blocks 702 are respectively adapted to the limiting grooves 15. The slot 4 is fixedly connected with a return spring 16. The free end of the return spring 16 is fixedly connected with a collar 17. The collar 17 is fixedly connected to the retaining ring 5. Under the action of the return spring 16, the collar 17 and the retaining ring 5 can completely fill the slot 4, so that when the plug 2 is not installed, the end of the outer tube 1 can remain flat, preventing dirt from entering the interior of the outer tube 1 from the gap. The outer tube 1 is threaded on the outside. The outer tube 1 is movably connected to a control ring 18 through the thread. The control ring 18 is rotatably connected to the adjusting ring 8. The end of the connecting block 705 away from the traction rope 704 is fixedly connected to the end of the adjusting ring 8.

[0044] Separate the plug 2 from the front end of the first conduit 3. Then, rotate the control ring 18 on the outside of the outer tube 1, causing the adjusting ring 8 to move away from the front end of the outer tube 1, driving several connecting blocks 705 to move synchronously. This controls the two traction ropes 704 at the front end of the connecting block 705 to move simultaneously, causing the rotating plate 701 to rotate around its axis, causing the limiting block 702 to separate from the limiting groove 15. At this time, the folding spring 703 is compressed and shortened. Under the action of the return spring 16, the gasket and retaining ring 5 are reset, thereby pushing the plug 6 out of the slot 4. This facilitates the replacement of the plug 2 without contact, avoids contact between waste liquid and limbs, and allows for quick replacement of the plug 2. This helps reduce the amount of waste liquid remaining on the outside of the plug 2, helps maintain the cleanliness of the end of the outer tube 1, and prevents the accumulation of bacteria at the end of the outer tube 1.

[0045] like Figure 1 , Figures 7 to 9 As shown, the switching assembly 12 includes a drive cylinder 121, a drive pin 122, and a compression spring 123. A drive groove 27 is formed on the outer side of the control tube 11. The drive pin 122 is fixedly connected to the inner side of the drive cylinder 121, and the drive pin 122 is movably engaged with the drive groove 27. A first annular groove 19 is formed at one end of the drive cylinder 121, and the end of the first guide tube 3 is movably connected to the inside of the first annular groove 19. A second annular groove 20 is formed at the other end of the drive cylinder 121, and the compression spring 123 is fixedly connected to... Connected to the inside of the second annular groove 20, the drive cylinder 121 moves between the first conduit 3 and the drain pipe 21 via the first annular groove 19 and the second annular groove 20. The drive cylinder 121, the first conduit 3, and the drain pipe 21 are tightly sealed. One end of the drive cylinder 121 is movably connected to the drain pipe 21 via the second annular groove 20. Several connecting strips 22 are fixedly connected between the second conduit 9 and the drain pipe 21, and the connecting strips 22 are arranged in a circular array. The connecting strips 22 facilitate the positioning of the first conduit 3 and the drain pipe. The drive cylinder 121 is integral with the connecting strip 22, which runs through the interior of the drive cylinder 121 and is movably connected to the drive cylinder 121. The free end of the compression spring 123 is fixedly connected to the end of the drain pipe 21. The drain pipe 21 is threaded on the outside and is movably connected to a push ring 23 through the thread. The end of the push ring 23 abuts against the end of the drive cylinder 121. A first channel 24 is provided on the guide pipe 10, and the first conduit 3 is connected to the drain pipe 21 through the first channel 24. A second channel 25 is provided on the guide pipe 10, and the first conduit 3 is connected to the second conduit 9 through the second channel 25. A sealing block 26 is fixedly connected inside the first conduit 3. The cross-sectional area of ​​the sealing block 26 is larger than the cross-sectional area of ​​the inlet end of the first channel 24, and the cross-sectional area of ​​the seal is larger than the cross-sectional area of ​​the inlet end of the second channel 25. The sealing block 26 is semi-circular and switches the sealing between the inlet end of the first channel 24 and the inlet end of the second channel 25, which is beneficial to control the flow direction of the liquid inside the first conduit 3 and the second conduit 9.

[0046] The drive cylinder 121 drives the drive pin 122 to move synchronously. Due to the active cooperation between the drive pin 122 and the drive groove 27, the control tube 11 rotates 90 degrees inside the first catheter 3. At this time, the sealing block 26 releases the obstruction of the inlet end of the second channel 25 and the sealing block 26 obstructs the inlet end of the first channel 24, so that the waste liquid cannot flow back from the drain pipe 21 into the inside of the first catheter 3. Then, the tubing clamp is removed, so that the second catheter 9 is unobstructed, so that the peritoneal dialysis fluid can enter the second channel 25 of the guide tube 10 through the second catheter 9 and flow into the inside of the first catheter 3. Finally, it flows into the patient's abdomen through the outer tube 1 and the inner tube. This allows the guide cylinder to rotate 90 degrees synchronously, so that the block can easily obstruct the inlet end of the first channel 24 or the second channel 25. This makes the operation of waste liquid discharge and dialysis fluid re-injection more independent, avoids backflow after waste liquid discharge, and helps to reduce the convergence of waste liquid inside the drain pipe 21 at the intersection of the first catheter 3 and the second catheter 9.

[0047] The workflow of the technical solution provided by this invention is as follows:

[0048] First, the outer tube 1 is connected to the inner tube via a connector. The inner tube is directly connected to the patient's abdomen, and the outer tube 1 is used to connect to a disposable peritoneal dialysis tube.

[0049] Then, the iodine cap is separated from the front end of the plug 2. Next, using the retaining ring, the front end of the plug 2 is inserted into the front end of the first catheter 3. Initially, the sealing block 26 blocks the inlet of the second channel 25, allowing the patient's abdominal waste fluid to enter the outer tube 1 through the inner tube, then into the first catheter 3, passing through the first channel 24 of the guide tube 10, and finally entering the inside of the dirty bag through the drain pipe 21. After all the patient's abdominal waste fluid has been drained into the dirty bag, the push ring 23 is rotated, pushing the drive cylinder 121 forward. The compression spring 123 is stretched inside the second ring groove 20, and the drive cylinder 121 drives the drive pin 12. 2. Synchronous movement: Due to the active cooperation between the drive pin 122 and the drive groove 27, the control tube 11 rotates 90 degrees inside the first catheter 3, thereby causing the guide tube to rotate 90 degrees synchronously. At this time, the sealing block 26 releases the obstruction of the inlet end of the second channel 25, and the sealing block 26 obstructs the inlet end of the first channel 24, so that the waste liquid cannot flow back from the drain pipe 21 into the inside of the first catheter 3. Remove the tubing clamp, so that the second catheter 9 is unobstructed, so that the peritoneal dialysis fluid can enter the second channel 25 of the guide tube 10 through the second catheter 9 and flow into the inside of the first catheter 3, and flow into the patient's abdomen through the outer tube 1 and the inner tube.

[0050] After the peritoneal dialysis fluid is replaced, the plug 2 is separated from the front end of the first catheter 3. Then, the control ring 18 on the outside of the outer tube 1 is rotated, causing the adjusting ring 8 to move away from the front end of the outer tube 1, which drives several connecting blocks 705 to move synchronously. This controls the two traction ropes 704 at the front end of the connecting block 705 to move simultaneously, causing the rotating plate 701 to rotate around its axis, so that the limiting block 702 is separated from the limiting groove 15. At this time, the folding spring 703 is compressed and shortened. Under the action of the return spring 16, the gasket and retaining ring 5 are reset, thereby pushing the plug 6 out of the slot 4, thus separating the plug 2 from the front end of the outer tube 1. After replacing the plug 2, the new iodine cap is fixed to the outside of the plug 2.

[0051] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A peritoneal dialysis catheter for use in nephrology dialysis, comprising an outer catheter, a plug, and a first catheter, characterized in that, The front end of the outer tube is provided with a slot, and a retaining ring is movably connected inside the slot. The tail end of the plug is fixedly connected with a plug block, which is adapted to the slot. Several limiting components are provided inside the front end of the outer tube, and the limiting components are respectively connected to the protruding end of the plug block. An adjusting ring is movably connected to the outside of the outer tube, and the adjusting ring is connected to the limiting components. The front end of the first conduit is adapted to the front end of the plug. A second conduit is fixedly connected to the outside of the first conduit. A guide tube is movably connected inside the first conduit. A control tube is movably connected inside the first conduit, and the control tube is fixedly connected to the guide tube. A switching component is provided on the first conduit, and the switching component is movably connected to the control tube. The limiting assembly includes a rotating plate, a limiting block, a folding spring, a traction rope, and a connecting block. The rotating plate, the limiting block, the folding spring, and the traction rope are all symmetrically arranged. The limiting block is fixedly connected to one side of the rotating plate, and the folding spring is fixedly connected to the other side of the rotating plate. A through hole is provided on the folding spring, and the traction rope passes through the through hole. One end of the traction rope is fixedly connected to the back side of the rotating plate, and the end of the traction rope away from the rotating plate is fixedly connected to the connecting block. A return spring is fixedly connected inside the slot, and a collar is fixedly connected to the free end of the return spring, and the collar is fixedly connected to the retaining ring. The switching assembly includes a drive cylinder, a drive pin, and a compression spring. A drive groove is provided on the outer side of the control tube. The drive pin is fixedly connected to the inner side of the drive cylinder and is movably engaged with the drive groove. A first annular groove is provided at one end of the drive cylinder, and the end of the first guide tube is movably connected to the inside of the first annular groove. A second annular groove is provided at the other end of the drive cylinder, and the compression spring is fixedly connected to the inside of the second annular groove. The guide tube has a first channel, through which the first conduit is connected to the sewage pipe; the guide tube has a second channel, through which the first conduit is connected to the second conduit. The first conduit is fixedly connected with a sealing block, the cross-sectional area of ​​which is larger than the cross-sectional area of ​​the inlet end of the first channel, and the cross-sectional area of ​​which is larger than the cross-sectional area of ​​the inlet end of the second channel.

2. The peritoneal dialysis catheter for use in nephrology dialysis according to claim 1, characterized in that, The front end of the outer tube is fixedly connected to several receiving blocks. The limiting block, folding spring and traction rope are all located inside the receiving block, and the rotating plate is movably connected to the end of the receiving block through a rotating shaft. The multiple protrusions of the insertion block have limiting grooves on both sides, and the limiting block is adapted to the limiting grooves respectively.

3. The peritoneal dialysis catheter for use in nephrology dialysis according to claim 2, characterized in that, The outer tube is threaded on the outside, and a control ring is movably connected to the outer tube via the thread. The control ring is rotatably connected to the adjustment ring, and the end of the connecting block away from the traction rope is fixedly connected to the end of the adjustment ring.

4. The peritoneal dialysis catheter for use in nephrology dialysis according to claim 1, characterized in that, One end of the drive cylinder is movably connected to a drain pipe through a second annular groove. Several connecting strips are fixedly connected between the second guide tube and the drain pipe, and the connecting strips are distributed in a circular array.

5. The peritoneal dialysis catheter for use in nephrology dialysis according to claim 4, characterized in that, The connecting strip passes through the interior of the drive cylinder and is movably connected to the drive cylinder. The free end of the compression spring is fixedly connected to the end of the drain pipe. The drain pipe has a thread on its outer side and a push ring is movably connected to the drain pipe through the thread. The end of the push ring abuts against the end of the drive cylinder.

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