Peritoneal dialysis catheter dysfunction exploration and treatment

Abstract

The invention discloses a peritoneal dialysis catheter dysfunction probing and treating device, and relates to the technical field of medical instruments, the peritoneal dialysis catheter dysfunction probing and treating device comprises a guide wire outer tube and a guide wire inner tube, and the guide wire inner tube is slidably installed in the guide wire outer tube; a movable handle is arranged on the guide wire outer tube; a camera mounting rack is arranged at one end of the guide wire outer tube, a signal transmission structure is arranged at the other end of the guide wire outer tube, and an instrument for camera shooting can be mounted on the camera mounting rack; one end of the guide wire inner tube is located in the guide wire outer tube, the other end of the guide wire inner tube extends out of the guide wire outer tube through one end of the camera mounting frame on the guide wire outer tube, a plurality of scraping parts which are uniformly distributed are mounted at the other end of the guide wire inner tube, and the scraping parts correspond to the side end of the guide wire outer tube. The problem that in the prior art, when fiber tissue is generated on the inner wall of a peritoneal dialysis catheter to cause blockage, only medicine thrombolysis can be conducted is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to detection and treatment of peritoneal dialysis catheter dysfunction. Background Art

[0002] Peritoneal dialysis uses the properties of the peritoneum as a semi-permeable membrane. The prepared dialysate is regularly and regularly infused into the patient's peritoneal cavity through a catheter by gravity. Due to the concentration gradient difference of solutes on both sides of the peritoneum, the solutes on the high-concentration side move to the low-concentration side (diffusion effect); water moves from the low-osmotic side to the high-osmotic side (osmotic effect). The peritoneal dialysis fluid is continuously replaced to achieve the purpose of removing metabolic products and toxic substances in the body and correcting water and electrolyte imbalance.

[0003] Currently, peritoneal dialysis catheters have functional disorders such as displacement and blockage, which can only be diagnosed by in vitro imaging (X-ray, ultrasound) without visual equipment for judgment. In addition, blockage caused by fibrous tissue adhesion on the inner wall of the catheter can only be treated with drug thrombolysis, which has poor effect and may even require a second operation or catheter removal, affecting the progress of the operation. Summary of the invention

[0004] The embodiment of the present invention provides a peritoneal dialysis catheter dysfunction detection and treatment to solve the problems in the background technology.

[0005] The embodiment of the present invention adopts the following technical scheme: a peritoneal dialysis catheter dysfunction detection and treatment, comprising an outer guide wire tube and an inner guide wire tube, wherein the inner guide wire tube is slidably mounted inside the outer guide wire tube; a movable handle is provided on the outer guide wire tube, wherein the movable handle is slidably mounted on the outer guide wire tube and connected to the inner guide wire tube arranged inside the outer guide wire tube, and the inner guide wire tube can be horizontally moved in the outer guide wire tube by sliding the movable handle on the outer guide wire tube; a camera mounting frame is provided on one end of the outer guide wire tube, and a signal transmission structure is provided on the other end of the outer guide wire tube, so that The camera mounting frame can be installed with an instrument for camera, and the camera mounted on the camera mounting frame is electrically connected to the signal transmission structure; one end of the guide wire inner tube is located inside the guide wire outer tube, and the other end of the guide wire inner tube extends to the outside of the guide wire outer tube through one end of the camera mounting frame on the guide wire outer tube, and a plurality of evenly distributed scrapers are installed on the other end of the guide wire inner tube, and the plurality of groups of scrapers correspond to the side ends of the guide wire outer tube. When the guide wire inner tube moves, the plurality of groups of scrapers can be driven to expand or contract on the guide wire guide wire inner tube through the cooperation of the guide wire outer tube. The problem that thrombolysis can only be achieved by drugs when fibrous tissue is generated on the inner wall of the peritoneal dialysis catheter in the prior art causes blockage is solved.

[0006] Furthermore, a sliding matching groove is provided on the guide wire outer tube, and a movable connecting piece is also provided inside the guide wire outer tube, and the movable connecting piece is located in the sliding matching groove, and the movable connecting piece is respectively connected with the movable handle and the guide wire inner tube in the sliding matching groove. The sliding matching groove is used to place the movable connecting piece and restrict the movable connecting piece, and the movable connecting piece is used to connect the movable handle with the guide wire inner tube.

[0007] Furthermore, the movable handle is composed of a sliding rod and a grasping rod, the sliding rod is slidably mounted on the guide wire outer tube, and the sliding rod covers the sliding matching groove on the guide wire outer tube, and the grasping rod is mounted on the sliding rod, the grasping rod is shorter than the sliding rod, and the grasping rod has a larger diameter than the sliding rod. The sliding rod in the movable handle can cover the sliding matching groove, so that the guide wire outer tube does not show a gap from the appearance, and prevents external pollution from entering the guide wire outer tube from the sliding matching groove, and the grasping rod is used for medical staff to move.

[0008] Furthermore, the gripping rod is provided with anti-skid patterns, which can prevent medical staff from slipping when moving the gripping rod.

[0009] Furthermore, a reset spring is provided on one end of the guide wire inner tube, the reset spring is located in the guide wire outer tube, and the reset spring is connected to the inner side wall of the guide wire outer tube in the guide wire outer tube. The reset spring is used to reset the guide wire inner tube after it moves.

[0010] Furthermore, a plurality of assembly grooves are provided on the other end of the guide wire inner tube, and the plurality of assembly grooves are evenly distributed around the guide wire inner tube, and each assembly groove is used to place a set of scraping members. The assembly grooves allow the scraping members to be located inside the guide wire inner tube, so that the scraping members on the guide wire inner tube will not increase the width of the guide wire inner tube.

[0011] Furthermore, one end of each assembly groove in the guide wire inner tube is arranged in an arc surface. Arranging one end of the assembly groove in an arc surface can change the moving position of the scraping member when the scraping member moves in the assembly groove.

[0012] Furthermore, the guide wire inner tube is provided with a plurality of limit plates, each of which corresponds to an assembly groove on the guide wire inner tube, and the limit plates are located on the corresponding assembly groove close to the arc surface. The limit plates can limit the scraper located in the assembly groove.

[0013] Furthermore, each group of scraping parts includes a scraping movable plate, a scraping barb and a resistance plate, the scraping movable plate is a rectangular long strip, and the scraping movable plate is made of memory metal, the scraping barb and the resistance plate are respectively arranged on both ends of the scraping movable plate, the scraping barb and the resistance plate are respectively located on both sides of the limit plate, the scraping movable plate, the scraping barb and the resistance plate are integrally formed, the scraping barb is in the shape of a hook, the height of the resistance plate is greater than the scraping movable plate, and the side end of the resistance plate extends outside the assembly groove to contact the side wall of the guide wire outer tube. The scraping part is used to scrape the fibrous tissue in the peritoneal dialysis catheter.

[0014] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0015] First, in the present application, the guide wire outer tube can be inserted into the peritoneal dialysis catheter along one end thereof. As the guide wire outer tube moves inside the peritoneal dialysis catheter, the camera mounting bracket provided on the guide wire outer tube will drive the camera to shoot the inside of the peritoneal dialysis catheter. The camera will transmit the captured content to the display end through the signal transmission structure for medical staff to view. Such exploration can allow medical staff to determine whether the peritoneal dialysis catheter has functional disorders such as displacement or blockage during operation. After the exploration is clear, the medical staff will decide on the subsequent operation steps.

[0016] Secondly, in the present application, an inner guidewire tube is provided outside the guidewire, and a plurality of scraping members are provided at the front end of the inner guidewire tube. The plurality of scraping members can be deployed on the inner guidewire tube, and the deployment angle is controllable. The plurality of scraping members are mainly used to scrape the fibrous tissue that may be attached to the inner wall of the peritoneal dialysis catheter. When the fibrous tissue is generated in the peritoneal dialysis catheter, it is scraped, so that the fibrous tissue can be prevented from clogging the peritoneal dialysis catheter. In this way, the problem that when the fibrous tissue is generated on the inner wall of the peritoneal dialysis catheter and causes blockage, the problem that thrombolysis can only be performed by drugs in the prior art is solved.

[0017] Third, in the present application, the sliding rod in the movable handle can cover the sliding matching groove so that the guide wire outer tube does not show a gap from the appearance, preventing external pollution from entering the guide wire outer tube through the sliding matching groove, and the grasping rod is used for medical staff to move it, so the grasping rod is designed to have a diameter larger than the sliding rod and a length smaller than the sliding rod, so that the grasping rod has a side end on the sliding rod, which is convenient for medical staff to move it.

[0018] Fourthly, in the present application, the gripping rod is provided with anti-skid patterns, which can increase the friction between the hand and the gripping rod when the medical staff grabs the gripping rod and pulls it, thereby preventing the medical staff from slipping when moving the gripping rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0021] Figure 2 It is a schematic diagram of disassembly and assembly of the movable connecting piece and the guide wire outer tube in the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0023] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0025] Figure 6 Schematic diagram of the assembly of the scraper and the inner tube of the guide wire in the present invention Figure 1 ;

[0026] Figure 7 Schematic diagram of the assembly of the scraper and the inner tube of the guide wire in the present invention Figure 2 .

[0027] Figure numerals: guide wire outer tube 1, sliding fitting groove 11, movable connecting part 12, movable handle 3, sliding rod 31, grasping rod 32, anti-slip pattern 321, camera mounting bracket 4, guide wire inner tube 2, return spring 21, assembly groove 22, limit plate 23, scraper 6, scraper movable plate 61, scraper barb 62, contact plate 63, signal transmission structure 5. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figure 1-Figure 7The embodiment of the present invention provides a peritoneal dialysis catheter dysfunction detection and treatment, including a guide wire outer tube 1 and a guide wire inner tube 2, wherein the guide wire inner tube 2 is slidably installed inside the guide wire outer tube 1; a movable handle 3 is provided on the guide wire outer tube 1, and the movable handle 3 is slidably installed on the guide wire outer tube 1 and connected to the guide wire inner tube 2 arranged in the guide wire outer tube 1, and the guide wire inner tube 2 can be horizontally moved in the guide wire outer tube 1 by sliding the movable handle 3 on the guide wire outer tube 1; a camera mounting frame 4 is provided on one end of the guide wire outer tube 1, and a signal transmission structure 5 is provided on the other end of the guide wire outer tube 1. An instrument for taking pictures can be installed on the image mounting frame 4, and the image pickup instrument installed on the image pickup frame 4 is electrically connected to the signal transmission structure 5; one end of the guide wire inner tube 2 is located inside the guide wire outer tube 1, and the other end of the guide wire inner tube 2 extends to the outside of the guide wire outer tube 1 through one end of the image pickup frame 4 on the guide wire outer tube 1, and a plurality of evenly distributed scraping members 6 are installed on the other end of the guide wire inner tube 2, and the plurality of groups of scraping members 6 correspond to the side ends of the guide wire outer tube 1. When the guide wire inner tube 2 moves, the plurality of groups of scraping members 6 can be driven to expand or contract on the guide wire inner tube 2 through the cooperation of the guide wire outer tube 1.

[0031] In the present application, a structure that can be used for exploration in a peritoneal dialysis catheter is designed. The guide wire tube in the prior art is made of a soft material. In the present application, the middle end of the guide wire outer tube 1 and the guide wire inner tube 2 is made of a soft material (such as the attached Figure 1 As shown, the guidewire outer tube 1 between the reference numeral 3 and the reference numeral 4 is made of soft material, and the guidewire inner tube 2 inside is the same as the guidewire outer tube 1, and the same positions of the two are made of soft materials), and the guidewire outer tube 1 and the guidewire inner tube 2 are made of disinfection-resistant materials (such as silicone material or polyurethane (PU) material). The guidewire outer tube 1 can enter the peritoneal dialysis catheter along one end. As the guidewire outer tube 1 moves inside the peritoneal dialysis catheter, the camera mounting frame 4 provided on the guidewire outer tube 1 will drive the camera to shoot the inside of the peritoneal dialysis catheter, and the camera will transmit the captured content to the display end through the signal transmission structure 5 for medical staff to view. Such exploration can allow medical staff to judge Whether the peritoneal dialysis catheter has functional disorders such as displacement or blockage during operation, the medical staff will decide on the subsequent operation steps after the investigation is clear. In the present application, a guide wire inner tube 2 is arranged outside the guide wire, and a plurality of scraping members 6 are arranged at the front end of the guide wire inner tube 2. The plurality of scraping members 6 can be unfolded on the guide wire inner tube 2, and the unfolding angle is controllable. The plurality of scraping members 6 are mainly used to scrape the fibrous tissue that may be attached to the inner wall of the peritoneal dialysis catheter. When the fibrous tissue is generated in the peritoneal dialysis catheter, it is scraped, so that the fibrous tissue can be prevented from blocking the peritoneal dialysis catheter. In this way, the problem that the fibrous tissue generated on the inner wall of the peritoneal dialysis catheter causes blockage and can only be thrombolyzed by drugs in the prior art is solved.

[0032] Preferably, a sliding fit groove 11 is provided on the guide wire outer tube 1, and a movable connecting member 12 is also provided inside the guide wire outer tube 1. The movable connecting member 12 is located in the sliding fit groove 11, and the movable connecting member 12 is respectively connected to the movable handle 3 and the guide wire inner tube 2 in the sliding fit groove 11.

[0033] In the present application, in order to enable the movable handle 3 to drive the guide wire inner tube 2 to move on the guide wire outer tube 1, a sliding fitting groove 11 and a movable connecting member 12 are designed. The sliding fitting groove 11 is used to place the movable connecting member 12 and restrict the movable connecting member 12 so that the movable connecting member 12 will not be offset when moving, and the movable connecting member 12 is used to connect the movable handle 3 with the guide wire inner tube 2, so that the movable handle 3 can drive the guide wire inner tube 2 to move in the guide wire outer tube 1 through the movable connecting member 12 when moving.

[0034] Preferably, the movable handle 3 is composed of a sliding rod 31 and a grasping rod 32, the sliding rod 31 is slidably installed on the guide wire outer tube 1, and the sliding rod 31 covers the sliding matching groove 11 on the guide wire outer tube 1, and the grasping rod 32 is installed on the sliding rod 31, the length of the grasping rod 32 is shorter than the sliding rod 31, and the diameter of the grasping rod 32 is larger than the sliding rod 31.

[0035] In the present application, the sliding rod 31 in the movable handle 3 can cover the sliding fitting groove 11, so that the guide wire outer tube 1 does not reveal a gap from the appearance, preventing external pollution from entering the guide wire outer tube 1 from the sliding fitting groove 11, and the grasping rod 32 is used for medical staff to move it, so the grasping rod 32 is designed to have a diameter larger than the sliding rod 31 and a length smaller than the sliding rod 31, so that the grasping rod 32 has a side end on the sliding rod 31, which is convenient for medical staff to move it.

[0036] Preferably, the gripping rod 32 is provided with anti-skid lines 321. The protective lines can increase the friction between the hand and the gripping rod 32 when the medical staff grabs the gripping rod 32 and pulls it, thereby preventing the medical staff from slipping when moving the gripping rod 32.

[0037] Preferably, a return spring 21 is provided on one end of the guide wire inner tube 2 , and the return spring 21 is located in the guide wire outer tube 1 . The return spring 21 is connected to the inner wall of the guide wire outer tube 1 in the guide wire outer tube 1 .

[0038] In the present application, the reset spring 21 is used to reset the guide wire inner tube 2 after it moves. The guide wire inner tube 2 can be moved by the moving handle 3. After the movement, the guide wire inner tube 2 will cooperate with the guide wire outer tube 1 to drive the multiple groups of scrapers 6 to unfold. When the guide wire inner tube 2 is in the initial position, the multiple groups of scrapers 6 will be in a retracted state. Therefore, the purpose of setting the reset spring 21 is to limit the initial position of the guide wire inner tube 2 in the guide wire outer tube 1, so that the multiple groups of scrapers 6 are in a retracted state when the guide wire inner tube 2 is not in use, and the guide wire inner tube 2 can be reset after moving.

[0039] Preferably, a plurality of assembly grooves 22 are provided on the other end of the guide wire inner tube 2 , and the plurality of assembly grooves 22 are evenly distributed around the guide wire inner tube 2 , and each of the assembly grooves 22 is used to place a set of scraping members 6 .

[0040] In the present application, a plurality of assembly grooves 22 for placing the scraper 6 are provided on the guide wire inner tube 2, so that the scraper 6 is located inside the guide wire inner tube 2 on the guide wire inner tube 2, so that the scraper 6 on the guide wire inner tube 2 will not increase the width of the guide wire inner tube 2, and thus will not affect the movement of the guide wire inner tube 2 in the guide wire outer tube 1.

[0041] Preferably, one end of each assembly groove 22 in the guide wire inner tube 2 is arranged in an arc surface.

[0042] In the present application, setting one end of the assembly groove 22 as an arc surface can change the moving position of the scraper 6 when the scraper 6 moves in the assembly groove 22. When the scraper 6 moves toward one end of the arc surface in the assembly groove 22, it will be inclined at an angle along the position of the arc surface, so that multiple groups of scrapers 6 will be in an unfolded state on the guide wire inner tube 2 after moving.

[0043] Preferably, a plurality of limit plates 23 are provided on the guide wire inner tube 2, each of the limit plates 23 corresponds to an assembly groove 22 on the guide wire inner tube 2, and the limit plates 23 are located on the corresponding assembly groove 22 close to the arc surface side.

[0044] In the present application, the limiting plate 23 can limit the scraper 6 located in the assembly groove 22, which can not only prevent the scraper 6 from loosening and falling off from the assembly groove 22, but also limit the scraper 6 when the scraper 6 needs to be retracted into the assembly groove 22, so that the scraper 6 will not be offset when in the retracted state.

[0045] Preferably, each group of the scraping members 6 includes a scraping movable plate 61, a scraping barb 62 and a resistance plate 63, the scraping movable plate 61 is a rectangular long strip, and the scraping movable plate 61 is made of memory metal, the scraping barb 62 and the resistance plate 63 are respectively arranged on the two ends of the scraping movable plate 61, the scraping barb 62 and the resistance plate 63 are respectively located on both sides of the limiting plate 23, the scraping movable plate 61, the scraping barb 62 and the resistance plate 63 are integrally formed, the scraping barb 62 is in the shape of a hook, the height of the resistance plate 63 is greater than that of the scraping movable plate 61, and the side end of the resistance plate 63 extends to the outside of the assembly groove 22 and contacts the side wall of the guide wire outer tube 1.

[0046] In the present application, the scraper 6 is used to scrape the fibrous tissue in the peritoneal dialysis catheter. The scraper movable plate 61 in the scraper 6 is used to cooperate with the resistance plate 63 in the assembly groove 22 to drive the scraper barb 62 to move. The resistance plate 63 is connected to the side wall of the guide wire outer tube 1. When the guide wire inner tube 2 is driven by the moving handle 3 to move in the guide wire outer tube 1, the guide wire inner tube 2 will shrink toward the guide wire outer tube 1. At this time, the resistance plate 63 that is connected to the side wall of the guide wire outer tube 1 will move in the assembly groove 22. In this way, the resistance plate 63 will cause the scraper movable plate 61 to move in the assembly groove 22 toward the side of the arc surface in the assembly groove 22. When moving, the scraping movable plate 61 passing through the arc surface will be restricted by the limiting plate 23 and cannot be separated from the assembly groove 22, so the scraping movable plate 61 at this time will be deformed along the arc surface, and the scraping movable plate 61 made of memory metal material and specifically prepared by superelastic recovery stress induced recovery will have a certain curvature change after deformation and continue to move outward, and as the scraping movable plate 61 moves a greater distance, its own shape will gradually recover, and before the scraping movable plate 61 itself recovers its shape, its angle will gradually change, so medical staff can decide the deployment angle of the scraping movable plate 61 according to the situation.

[0047] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for detecting and treating peritoneal dialysis catheter dysfunction, characterized in that: It comprises a guide wire outer tube (1) and a guide wire inner tube (2), wherein the guide wire inner tube (2) is slidably mounted inside the guide wire outer tube (1); The guide wire outer tube (1) is provided with a movable handle (3), the movable handle (3) is slidably mounted on the guide wire outer tube (1) and is connected to the guide wire inner tube (2) arranged in the guide wire outer tube (1), and the guide wire inner tube (2) can be horizontally moved in the guide wire outer tube (1) by sliding the movable handle (3) on the guide wire outer tube (1); A camera mounting frame (4) is provided on one end of the guide wire outer tube (1), and a signal transmission structure (5) is provided on the other end of the guide wire outer tube (1); an instrument for camera can be installed on the camera mounting frame (4), and the camera instrument installed on the camera mounting frame (4) is electrically connected to the signal transmission structure (5); One end of the guide wire inner tube (2) is located inside the guide wire outer tube (1), and the other end of the guide wire inner tube (2) extends to the outside of the guide wire outer tube (1) through one end of a camera mounting frame (4) on the guide wire outer tube (1). A plurality of evenly distributed scraping members (6) are mounted on the other end of the guide wire inner tube (2), and the plurality of groups of scraping members (6) correspond to the side ends of the guide wire outer tube (1). When the guide wire inner tube (2) moves, the plurality of groups of scraping members (6) can be driven to expand or contract on the guide wire inner tube (2) through the cooperation of the guide wire outer tube (1).

2. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 1, characterized in that: The guide wire outer tube (1) is provided with a sliding matching groove (11), and a movable connecting member (12) is also provided inside the guide wire outer tube (1). The movable connecting member (12) is located in the sliding matching groove (11), and the movable connecting member (12) is respectively connected to the movable handle (3) and the guide wire inner tube (2) in the sliding matching groove (11).

3. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 1, characterized in that: The movable handle (3) is composed of a sliding rod (31) and a grasping rod (32); the sliding rod (31) is slidably mounted on the guide wire outer tube (1), and the sliding rod (31) covers the sliding matching groove (11) on the guide wire outer tube (1); the grasping rod (32) is mounted on the sliding rod (31); the grasping rod (32) is shorter than the sliding rod (31) and has a larger diameter than the sliding rod (31).

4. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 3, characterized in that: The gripping rod (32) is provided with anti-slip patterns (321).

5. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 1, characterized in that: A return spring (21) is provided on one end of the guide wire inner tube (2), and the return spring (21) is located inside the guide wire outer tube (1). The return spring (21) is connected to the inner side wall of the guide wire outer tube (1) inside the guide wire outer tube (1).

6. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 1, characterized in that: A plurality of assembly grooves (22) are provided on the other end of the guide wire inner tube (2), and the plurality of assembly grooves (22) are evenly distributed around the guide wire inner tube (2), and each assembly groove (22) is used to place a group of scraping members (6).

7. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 1, characterized in that: One end of each assembly groove (22) in the guide wire inner tube (2) is arranged in the form of an arc surface.

8. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 6, characterized in that: The guide wire inner tube (2) is provided with a plurality of limit plates (23), each of the limit plates (23) corresponds to an assembly groove (22) on the guide wire inner tube (2), and the limit plates (23) are located on the corresponding assembly groove (22) close to the arc surface.

9. The method for detecting and treating peritoneal dialysis catheter dysfunction according to claim 6, characterized in that: Each group of scraping members (6) comprises a scraping movable plate (61), a scraping barb (62) and a contact plate (63); the scraping movable plate (61) is a rectangular long strip plate, and the scraping movable plate (61) is made of memory metal; the scraping barb (62) and the contact plate (63) are respectively arranged on the two ends of the scraping movable plate (61); the scraping barb (62) and the contact plate (63) are respectively located on the two sides of the limiting plate (23); the scraping movable plate (61), the scraping barb (62) and the contact plate (63) are integrally formed; the scraping barb (62) is in the shape of a curved hook; the height of the contact plate (63) is greater than that of the scraping movable plate (61); and the side end of the contact plate (63) extends outside the assembly groove (22) to contact the side wall of the guide wire outer tube (1).

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