A peritoneal dialysis tube floating tube resetting device

Abstract

This invention provides a peritoneal dialysis catheter repositioning device, comprising a main rod, weights, a guide rod, and a guide head. The main rod is suitable for insertion into the dialysis catheter. At least two weights are spaced apart near the distal end of the main rod. The guide rod is connected to the distal end of the main rod, and the guide head is located at the end of the guide rod furthest from the main rod. In use, the operator inserts the guide head into the peritoneal dialysis catheter, pushes the main rod, and guides the guide rod into the bent or twisted section. The weights use gravity and a lever effect to correct the catheter wall deformation, and the main rod assists in repositioning. After adjustment, the main rod is pulled back at a uniform speed. In this invention, the main rod has a balance of flexibility and rigidity, conforming to bending and providing support; the guide surface reduces frictional resistance and adapts to bending paths; the flexibility of the guide rod allows it to easily enter the twisted section. This invention effectively solves the problems of peritoneal dialysis catheter bending and twisting, provides good repositioning, minimizes damage to the peritoneal dialysis catheter, ensures dialysis effectiveness, and reduces the risk of treatment interruption.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a peritoneal dialysis catheter repositioning device. Background Technology

[0002] In the medical field, dialysis is an important means of treating diseases such as kidney failure. Peritoneal dialysis is a blood purification method that uses the peritoneum as a dialysis membrane. By utilizing the concentration gradient between the peritoneum inside the body and the dialysate outside, metabolic waste and excess water are removed from the body, thereby replacing the excretory function of the kidneys and maintaining the stability of the internal environment.

[0003] For peritoneal dialysis surgery, establishing a continuous and safe dialysis access is crucial. However, due to various unstable factors, the peritoneal dialysis catheter can easily drift out of the true pelvic cavity, a condition commonly known as "catheter drift" (e.g., Figure 7 (As shown). Possible causes of catheter drift include improper body positioning, changes in abdominal pressure, excessively rapid dialysate flow, poor catheter fixation, and excessive intestinal gas. Once the peritoneal dialysis catheter drifts, the patient will experience obstructed dialysate drainage, which not only significantly reduces the quality and effectiveness of dialysis but also causes patient discomfort. Therefore, analyzing the causes of catheter drift and the appropriate nursing care is crucial.

[0004] Currently, methods for managing peritoneal dialysis catheter drift in clinical practice include bowel movements, exercise (such as squatting or climbing stairs), and abdominal massage. However, these methods require certain skills and physical strength, and some patients may find them complex or difficult, with uncertain effectiveness, leading to low patient compliance. When these methods are ineffective, surgical repositioning is usually necessary, such as laparoscopic repositioning, repositioning via a small incision beside the abdominal catheter, or catheter re-insertion. Surgical repositioning is invasive and causes significant pain for the patient; if the trauma is too great, temporary switching to hemodialysis may be required as an overtreatment.

[0005] Therefore, there is an urgent need for a peritoneal dialysis catheter repositioning device that is not affected by the patient's physical condition, has a simple repositioning operation, and has obvious effects. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the technical defects of the existing peritoneal dialysis catheter repositioning method, which requires high skill and physical strength from the patient, resulting in low compliance. The surgical repositioning method is invasive, and if the trauma is too great, it may be necessary to temporarily switch to hemodialysis for overtreatment, thus causing great pain to the patient. Therefore, this utility model provides a peritoneal dialysis catheter repositioning device that is not affected by the patient's physical strength, has a simple repositioning operation, and has obvious effects.

[0007] Therefore, this utility model provides a peritoneal dialysis catheter drift repositioning device, comprising: The main rod is suitable for insertion into the dialysis tubing, and has a certain degree of flexibility and rigidity, so as to conform to the bending direction of the dialysis tubing. At least two weights are spaced apart near the far end of the main rod to apply force to the wall of the dialysis tube under the action of gravity. A guide rod is connected to the far end of the main rod. The guide rod has a certain degree of flexibility and a certain degree of rigidity, which can conform to the bending direction of the dialysis tube and is easier to bend than the main rod, so that it can enter the twisted part of the dialysis tube more easily. A guide head is disposed at the end of the guide rod away from the main body rod, and the free end of the guide head is provided with an arc-shaped guide surface.

[0008] Furthermore, the main rod is a stranded wire, which is made of multiple strands of single wire twisted together.

[0009] Furthermore, the weight is spindle-shaped with a larger center and smaller ends along the axial direction of the main rod, and the outer surface of the weight is rounded.

[0010] Furthermore, the guide rod is a helical spring of a certain length.

[0011] Furthermore, the guide head is a sphere, and the outer diameter of the sphere is substantially the same as the outer diameter of the helical spring.

[0012] Furthermore, the guide head is a tapered shape that tapers away from the guide rod, and the small end of the tapered head is formed with the guide surface. The outer diameter of the large end of the tapered head is substantially the same as the outer diameter of the helical spring.

[0013] This utility model also provides a peritoneal dialysis catheter repositioning device, including the repositioning device described above and a sleeve suitable for insertion of the repositioning device; the sleeve is suitable for insertion into the dialysis catheter, and the sleeve has a certain degree of flexibility and a certain degree of rigidity, and can conform to the bending direction of the dialysis catheter.

[0014] Furthermore, a main rod handle is provided at the proximal end of the main rod, a sleeve handle is provided at the proximal end of the sleeve, and a compression spring is provided between the main rod handle and the sleeve handle.

[0015] Furthermore, the sleeve is a plastic-coated spring hose.

[0016] The technical solution provided by this utility model has the following advantages: This utility model discloses a peritoneal dialysis catheter repositioning device, comprising a main rod, weights, a guide rod, and a guide head. The main rod is suitable for insertion into the dialysis catheter, possessing a certain degree of flexibility and rigidity, and can conform to the bending direction of the dialysis catheter. At least two weights are spaced apart near the distal end of the main rod, used to apply force to the catheter wall under gravity. The guide rod is connected to the distal end of the main rod, possessing a certain degree of flexibility and rigidity, conforming to the bending direction of the dialysis catheter, and is more easily bent than the main rod, allowing for easier insertion into the tortuous portion of the dialysis catheter. The guide head is located at the end of the guide rod furthest from the main rod, and the free end of the guide head has an arc-shaped guide surface.

[0017] This invention relates to a peritoneal dialysis catheter repositioning device. When catheter drift is confirmed in a patient, imaging examinations (such as ultrasound or X-ray) can be used to determine the location and extent of the catheter bending or twisting. The repositioning device is then disinfected. The operator holds the proximal end of the main rod and gently inserts the guide head of the guide rod into the opening of the peritoneal dialysis catheter. The main rod is slowly pushed along the natural path of the catheter, relying on the greater flexibility of the guide rod to preferentially reach the bending or twisting area. When the repositioning device passes through the bending area, weights spaced at the distal end of the main rod exert an outward expansion force on the catheter wall at the bending point under the action of gravity. Multiple weights automatically adjust the direction and intensity of force according to the bending angle, forming a "lever effect" to gradually correct the tube wall deformation. The "flexibility + moderate hardness" of the main rod provides support while transmitting the operator's pushing force to the distal end to assist in repositioning. The morphology of the dialysis tube is observed in real time through imaging equipment (such as ultrasound) to confirm that the bent or twisted part has been restored to patency. If it is not completely repositioned, it can be pushed forward again by slightly rotating or withdrawing the device, and the weights are used to apply force for adjustment again. After adjustment, the main rod is pulled back at a constant speed to avoid rapid withdrawal that may cause secondary damage to the lumen. Finally, the flow of dialysate is checked to see if it has returned to normal, and the operation is completed.

[0018] This invention relates to a peritoneal dialysis catheter repositioning device. The main rod features a balanced design of flexibility and rigidity, allowing it to conform to the natural curvature of the dialysis catheter while providing sufficient support to prevent excessive bending during insertion and resulting positioning deviations. A weight applies uniform pressure to the catheter wall using gravity, gradually correcting bends or twists using mechanical principles, preventing secondary damage caused by uneven manual operation. The arc-shaped guide surface reduces frictional resistance with the peritoneal dialysis catheter wall, facilitating device movement within the catheter. Its smooth surface also helps adapt to the initial bending path of the lumen, improving safety when passing through narrow sections. The flexibility of the guide rod allows it to deform with the shape of the lumen, easily entering twisted sections and avoiding damage to the peritoneal dialysis catheter wall caused by forced insertion.

[0019] The peritoneal dialysis catheter repositioning device of this invention can effectively solve problems such as bending and twisting of the peritoneal dialysis catheter, with good repositioning effect and minimal damage to the dialysis catheter, thereby ensuring dialysis effect and reducing the risk of treatment interruption.

[0020] This utility model also provides a peritoneal dialysis catheter repositioning device, including the repositioning device described above and a sleeve suitable for insertion of the repositioning device; the sleeve is suitable for insertion into the dialysis catheter, and the sleeve has a certain degree of flexibility and a certain degree of rigidity, and can conform to the bending direction of the dialysis catheter.

[0021] In use, this invention allows for the following steps: First, the cannula is inserted separately into the peritoneal dialysis tube, allowing it to be slowly advanced along the natural curvature of the tube to the proximal end of the bending area (not fully entering the tortuous section). Then, the aforementioned repositioning device is inserted from the proximal end of the cannula and advanced along the inner lumen of the cannula to the distal end. The cannula position is kept fixed, and the main rod is continued to be advanced until the guide head extends from the distal end of the cannula and enters the bending or tortuous section. The weight of the weight block is used to correct the bending or tortuous section of the cannula. For severely tortuous sections, the cannula position can be kept fixed, and then the main rod can be pulled out to impact the wall of the bent section with the guide head. Alternatively, the advancement / rotation angle of the cannula and the repositioning device can be finely adjusted simultaneously. The lever effect of the repositioning device is enhanced by the "wrapping support" of the peritoneal dialysis tube by the outer wall of the cannula, thereby achieving multiple force application modes for the peritoneal dialysis tube and improving the repositioning effect. The morphology of the peritoneal dialysis tube is observed in real time using imaging equipment (such as ultrasound) to confirm that the bending or tortuous section has been restored to patency. If not fully repositioned, the above operation can be repeated. After adjustment, the main rod is slowly withdrawn first, and then the cannula is removed.

[0022] This invention relates to a peritoneal dialysis catheter repositioning device. The "flexibility + moderate hardness" of the cannula allows it to conform to the original shape of the dialysis catheter, pre-expanding the slightly narrowed section to create a smooth channel for subsequent operations. At the same time, the cannula can isolate the main rod, weight, guide rod, etc., from the peritoneal dialysis catheter wall during the insertion of the main rod, avoiding frictional damage caused by direct contact. It can also assist the repositioning device to operate more stably inside the peritoneal dialysis catheter, improving the accuracy and success rate of repositioning. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0024] Figure 1 This is a schematic diagram of the overall structure of the peritoneal dialysis tube drift repositioning device in Embodiment 1 of this utility model.

[0025] Figure 2 yes Figure 1 Enlarged structural diagram of part A.

[0026] Figure 3 This is a schematic diagram of the overall structure of the peritoneal dialysis catheter drift repositioning device in Example 2.

[0027] Figure 4 yes Figure 3 Enlarged structural diagram of section B.

[0028] Figure 5 yes Figure 4 A cross-sectional view.

[0029] Figure 6 yes Figure 5 A magnified schematic diagram of the structure of section C.

[0030] Figure 7 This is a schematic diagram of a peritoneal dialysis catheter drifting within the patient's body.

[0031] Reference numerals: 1. Main rod; 11. Main rod handle; 2. Weight; 3. Guide rod; 4. Guide head; 40. Guide surface; 5. Sleeve; 51. Sleeve handle; 6. Compression spring. Detailed Implementation

[0032] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0033] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0034] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0035] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example 1

[0036] This embodiment provides a peritoneal dialysis catheter repositioning device, such as... Figure 1 , Figure 2 As shown, the dialysis tube includes a main rod 1, a weight 2, a guide rod 3, and a guide head 4. The main rod 1 is suitable for insertion into the dialysis tube, possessing a certain degree of flexibility and rigidity, and can conform to the bending direction of the dialysis tube. There are at least two weights 2, spaced apart near the distal end of the main rod 1, used to apply force to the wall of the dialysis tube under the action of gravity. The guide rod 3 is connected to the distal end of the main rod 1, possessing a certain degree of flexibility and rigidity, and can conform to the bending direction of the dialysis tube. It is also more flexible than the main rod 1, allowing it to enter the tortuous part of the dialysis tube more easily. The guide head 4 is located at the end of the guide rod 3 away from the main rod 1, and the free end of the guide head 4 is provided with an arc-shaped guide surface 40.

[0037] In this embodiment, when it is confirmed that the peritoneal dialysis catheter has drifted in the patient's body, the location and extent of the bending or twisting of the peritoneal dialysis catheter can be confirmed first through imaging examinations (such as ultrasound or X-ray localization). Then, the repositioning device of this embodiment is disinfected. The operator holds the proximal end of the main rod 1 and gently inserts the guide head 4 at the front end of the guide rod 3 into the opening of the peritoneal dialysis catheter. The main rod 1 is slowly pushed along the natural direction of the peritoneal dialysis catheter. Relying on the greater flexibility of the guide rod 3 compared to the main rod 1, it preferentially enters the bending or twisting area. When the repositioning device passes through the bending area, the weights 2 spaced apart at the distal end of the main rod 1 apply an outward expansion force to the tube wall at the bending point under the action of gravity. The weight 2 automatically adjusts the direction and intensity of the applied force according to the bending angle, forming a "lever effect" to gradually correct the tube wall deformation; the "flexibility + moderate hardness" of the main rod 1 provides support while transmitting the operator's pushing force to the distal end to assist in repositioning; the morphology of the dialysis tube is observed in real time through imaging equipment (such as ultrasound) to confirm that the bent or twisted part has been restored to patency. If it is not completely repositioned, it can be pushed forward again by slightly rotating or withdrawing the device, and the weight 2 is used to apply force for adjustment a second time; after adjustment, the main rod 1 is pulled back at a constant speed to avoid rapid withdrawal that may cause secondary damage to the lumen. Finally, the flow of dialysis fluid is checked to ensure that it has returned to normal, and the operation is completed.

[0038] In this embodiment of the peritoneal dialysis catheter drift repositioning device, the main rod 1 can be made of medical-grade polyetheretherketone (PEEK) or 316LVM medical stainless steel; the weight 2 can be made of medical-grade tungsten alloy (WNiFe) or titanium-6aluminum-4vanadium alloy (Ti-6Al-4V ELI); and the guide rod 3 and guide head 4 can be made of nickel-titanium alloy (Nitinol) or medical-grade silicone-coated polyimide core. The main rod 1 features a balanced design of flexibility and rigidity, allowing it to conform to the natural curvature of the dialysis tubing while providing sufficient support to prevent excessive bending during insertion and resulting positioning deviations. The weight 2 applies uniform pressure to the tubing wall using gravity, gradually correcting bends or twists using mechanical principles to prevent secondary damage caused by uneven manual operation. The arc-shaped guide surface 40 reduces frictional resistance with the peritoneal dialysis tubing wall, facilitating device movement within the tubing. Its smooth surface also helps adapt to the initial bending path of the lumen, improving safety when passing through narrow sections. The flexibility of the guide rod 3 allows it to deform with the shape of the lumen, easily entering the tortuous section and avoiding damage to the peritoneal dialysis tubing wall caused by forced insertion.

[0039] The peritoneal dialysis catheter repositioning device in this embodiment can effectively solve problems such as bending and twisting of the peritoneal dialysis catheter, with good repositioning effect and minimal damage to the dialysis catheter, thereby ensuring dialysis effect and reducing the risk of treatment interruption.

[0040] In this embodiment of the peritoneal dialysis catheter repositioning device, the main body rod 1 is a stranded wire, which is made of multiple strands of single wire twisted together.

[0041] In this embodiment, the main rod 1 of the stranded wire structure has better flexibility and strength, which can better conform to the bending direction of the dialysis tube and improve the effectiveness of the device. At the same time, the stranded wire structure has both high tensile strength and multi-directional bending ability, which can adapt to the multi-angle bending path of the dialysis tube, while avoiding the risk of single-strand wire breaking and extending the service life of the device.

[0042] In this embodiment of the peritoneal dialysis catheter repositioning device, the weight 2 is spindle-shaped with a larger middle and smaller ends along the axial direction of the main body rod 1, and the outer surface of the weight 2 is rounded.

[0043] In this embodiment, the weight 2 adopts a spindle-shaped design, which can more effectively exert force on the peritoneal dialysis tube wall under the action of gravity, while the outer surface with rounded transition can reduce damage to the tube wall.

[0044] In this embodiment of the peritoneal dialysis catheter drift repositioning device, the guide rod 3 is a helical spring of a certain length.

[0045] In this embodiment, the guide rod 3 is a helical spring. The elastic deformation capability of the helical spring allows it to flexibly adjust its shape in complex bending paths, thereby making it easier to enter the torsion part of the peritoneal dialysis tube and improving the adaptability of the repositioning device to different bending conditions.

[0046] In this embodiment of the peritoneal dialysis catheter repositioning device, the guide head 4 is a ball, and the outer diameter of the ball is basically the same as the outer diameter of the helical spring.

[0047] In this embodiment, the spherical guide head 4 has a smooth surface, which can reduce the resistance when moving inside the peritoneal dialysis tube; its outer diameter is basically the same as the outer diameter of the helical spring, ensuring a smooth transition between the guide rod 3 and the guide head 4, and avoiding a surge in resistance or damage to the tube wall due to abrupt changes in size.

[0048] In this embodiment of the peritoneal dialysis catheter float repositioning device, the guide head 4 is a tapered shape that tapers away from the guide rod 3, and the small end of the cone is formed with the guide surface 40. The outer diameter of the large end of the cone is basically the same as the outer diameter of the helical spring.

[0049] In this embodiment, the tapered cone-shaped guide head 4 helps the device enter the peritoneal dialysis tube more easily, the guide surface reduces resistance, and the large end has the same outer diameter as the helical spring to ensure structural stability. Example 2

[0050] This embodiment provides a peritoneal dialysis catheter repositioning device, such as... Figure 3-6As shown, it includes the reset device in Embodiment 1 and a sleeve 5 suitable for insertion of the reset device; the sleeve 5 is suitable for insertion into the dialysis tube, and the sleeve 5 has a certain degree of flexibility and a certain degree of hardness, and can conform to the bending direction of the dialysis tube.

[0051] In this embodiment, the outer diameter of the cannula 5 is slightly smaller than the inner diameter of the peritoneal dialysis catheter, facilitating smooth insertion into the peritoneal dialysis catheter. During use, the cannula 5 can be inserted into the peritoneal dialysis catheter alone, allowing it to be slowly advanced along the natural curvature of the catheter to the proximal end of the bending area (not fully entering the tortuous section); then, the resetting device described in Embodiment 1 is inserted from the proximal end of the cannula 5 and advanced along the inner cavity of the cannula 5 to the distal end; keeping the cannula 5 in a fixed position, the main rod 1 is continued to be advanced, allowing the guide head 4 to extend from the distal end of the cannula 5 and enter the bending or tortuous section; the weight of the counterweight 2 is used to correct the bending or tortuous section of the cannula 5; for more severely tortuous locations, the position of the cannula 5 can be kept fixed, and then the cannula 5 can be withdrawn... Pull the main rod 1 to drive the guide head 4 to impact the wall of the bent section of the tube. Alternatively, the advancement / rotation angle of the sleeve 5 and the repositioning device can be finely adjusted simultaneously. The leverage effect of the repositioning device is enhanced by the "wrapping and support" of the peritoneal dialysis tube by the outer wall of the sleeve 5, thereby realizing multiple force application modes on the peritoneal dialysis tube and improving the repositioning effect. The shape of the peritoneal dialysis tube is observed in real time through imaging equipment (such as ultrasound) to confirm that the bent or torn part has been restored to patency. If it is not completely repositioned, the above operation can be repeated. After the adjustment is completed, first slowly pull back the main rod 1, and then remove the sleeve 5.

[0052] This embodiment adds a sheath 5 to Embodiment 1. The sheath 5 can be made of segmented polyurethane (PU) or polytetrafluoroethylene (PTFE) composite spring tubing. The sheath 5's "flexibility + moderate hardness" allows it to conform to the original shape of the dialysis tubing, pre-expanding slightly narrowed sections and creating a smooth channel for subsequent operations. When the sheath 5 is inserted into the peritoneal dialysis tubing, its outer wall fits tightly against the inner wall, forming a "physical wrapping structure." The contact point between the outer wall of the sheath 5 and the inner wall of the peritoneal dialysis tubing forms a "stable fulcrum," providing support for the force applied by the main rod 1, guide head 4, etc. When the main rod 1 is pulled, the corrective force of the guide head 4 on the tortuous tubing wall can be amplified through the fulcrum of the sheath 5, forming a "lever effect," significantly increasing the expansion force on severely tortuous sections. The moderate hardness of the sheath 5 can resist the collapse or deformation of the tortuous section of the peritoneal dialysis tubing, maintaining the lumen's stability. The continuity of the tube prevents the main rod 1 and guide head 4 from deviating from the target path due to lumen collapse. Especially in the spiral twisting section, the wrapping effect of the cannula 5 can prevent further twisting of the peritoneal dialysis tube, providing a stable operating channel for the repositioning operation. When the cannula 5 and the main rod 1 are rotated synchronously, the wrapping support of the cannula 5 can evenly transmit the rotational torque to the peritoneal dialysis tube wall, helping to "unlock" the spiral twisting structure. At the same time, the cannula 5 can isolate the main rod 1, weight 2, guide rod 3 and other components from the peritoneal dialysis tube wall during the insertion of the main rod 1, avoiding frictional damage caused by direct contact. It can also help the repositioning device operate more stably inside the peritoneal dialysis tube, improving the accuracy and success rate of repositioning.

[0053] In this embodiment of the peritoneal dialysis catheter repositioning device, the proximal end of the main rod 1 is provided with a main rod handle 11, the proximal end of the sleeve 5 is provided with a sleeve handle 51, and a compression spring 6 is provided between the main rod handle 11 and the sleeve handle 51.

[0054] In this embodiment, the compression spring 6 is configured as follows: When the main body rod 1 of the reset device is inserted into the sleeve 5, the compression spring 6 is in a naturally extended state (uncompressed) when the guide head 4 has not yet extended out of the sleeve 5, or has just extended out of the sleeve 5. As the main body rod 1 is further inserted, the compression spring 6 begins to be compressed; at least when the guide rod 3 is fully extended out of the sleeve 5, the compression spring 6 is at its compression limit (cannot be compressed further). The main body rod handle 11 and the sleeve handle 51 facilitate operation; the compression spring 6 provides a certain amount of buffering and elastic force during operation, making the operation more flexible and comfortable, and also helps to better control the movement and force application of the guide rod 3 in the peritoneal dialysis tube.

[0055] In this embodiment of the peritoneal dialysis catheter repositioning device, the sleeve 5 is a plastic-coated spring hose.

[0056] In this embodiment, the sleeve 5 is a plastic-coated spring hose. Its plastic coating design can further reduce the friction coefficient between the metal spring and the peritoneal osmosis tube, reduce the wear on the peritoneal osmosis tube, and enhance corrosion resistance and biocompatibility. The dual composite structure of the plastic-coated spring hose has both flexibility and support, which can adapt to the repositioning requirements of long-path curved pipes, thereby further improving the applicability and safety of the repositioning device.

[0057] In this embodiment of the peritoneal dialysis catheter repositioning device, the materials and surface treatment of components such as the main rod 1, weight 2, guide rod 3, guide head 4, and sleeve 5 must meet the biocompatibility requirements of medical devices and comply with the safety standards of medical devices.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A peritoneal dialysis catheter repositioning device, characterized in that, include: The main rod (1) is suitable for insertion into the dialysis tube, has a certain degree of flexibility and a certain degree of hardness, and can conform to the bending direction of the dialysis tube; At least two weights (2) are spaced apart near the far end of the main rod (1) to apply force to the wall of the dialysis tube under the action of gravity. The guide rod (3) is connected to the far end of the main rod (1). The guide rod (3) has a certain degree of flexibility and a certain degree of hardness. It can follow the bending direction of the dialysis tube and is easier to bend than the main rod (1). It can enter the twisted part of the dialysis tube more easily. A guide head (4) is provided at one end of the guide rod (3) away from the main rod (1), and the free end of the guide head (4) is provided with an arc-shaped guide surface (40).

2. The peritoneal dialysis catheter repositioning device according to claim 1, characterized in that, The main rod (1) is a stranded wire, which is made of multiple strands of single wire twisted together.

3. The peritoneal dialysis catheter repositioning device according to claim 1, characterized in that, The weight (2) is spindle-shaped with a large middle and small ends along the axial direction of the main rod (1), and the outer surface of the weight (2) is rounded.

4. The peritoneal dialysis catheter repositioning device according to claim 1, characterized in that, The guide rod (3) is a helical spring of a certain length.

5. The peritoneal dialysis catheter repositioning device according to claim 4, characterized in that, The guide head (4) is a sphere, and the outer diameter of the sphere is basically the same as the outer diameter of the helical spring.

6. The peritoneal dialysis catheter repositioning device according to claim 4, characterized in that, The guide head (4) is a tapered shape that tapers away from the guide rod (3), and the small end of the tapered head is formed with the guide surface (40). The outer diameter of the large end of the tapered head is basically the same as the outer diameter of the helical spring.

7. A peritoneal dialysis catheter repositioning device, characterized in that, Includes a reset device as described in any one of claims 1-6 and a sleeve (5) suitable for insertion of the reset device; the sleeve (5) is suitable for insertion into the dialysis tube, and the sleeve (5) has a certain degree of flexibility and a certain degree of hardness, and can conform to the bending direction of the dialysis tube.

8. The peritoneal dialysis catheter repositioning device according to claim 7, characterized in that, The main rod (1) has a main rod handle (11) at its proximal end, and the sleeve (5) has a sleeve handle (51) at its proximal end. A compression spring (6) is provided between the main rod handle (11) and the sleeve handle (51).

9. The peritoneal dialysis catheter repositioning device according to claim 8, characterized in that, The sleeve (5) is a plastic-coated spring hose.

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