Anti-drift tube peritoneal dialysis device with integrated pose perception

Abstract

The present application relates to the field of medical devices, and discloses a peritoneal dialysis device with integrated pose perception and anti-drifting tube, comprising a peritoneal dialysis tube and a controller, the peritoneal dialysis tube is provided with a first through hole and a second through hole eccentrically arranged at different circumferential positions, a first guide wire and a second guide wire are respectively arranged in the corresponding through holes and are in force transmission connection with the distal end of the peritoneal dialysis tube; the first guide wire and the second guide wire are driven to move axially by the controller, so that the peritoneal dialysis tube is actively bent in different bending planes, and the bending direction and angle of the peritoneal dialysis tube are obtained by using a three-dimensional shape sensing optical fiber, and the controller can be separated from the peritoneal dialysis tube when the peritoneal dialysis tube passes through the subcutaneous tunnel, and can be reconnected when adjustment is needed, so that the multidirectional active adjustment, pose perception and passability during implantation of the peritoneal dialysis tube are considered.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to an anti-drift peritoneal dialysis device with integrated posture sensing. Background Technology

[0002] Peritoneal dialysis is one of the important methods of renal replacement therapy in clinical practice. The peritoneal dialysis catheter needs to be left in the patient's body for a long time and is responsible for the input and output of peritoneal dialysis fluid. During long-term use, the peritoneal dialysis catheter may change position due to factors such as changes in body position and intestinal peristalsis, causing the distal end of the catheter to deviate from the appropriate position, which in turn affects the normal exchange of peritoneal dialysis fluid. After the peritoneal dialysis catheter is displaced, it is necessary to adjust or reposition the catheter according to its actual condition.

[0003] Regarding the adjustment of peritoneal dialysis catheter position, existing technologies have proposed technical solutions that actively change the bending state of the catheter through structures such as flexible joints and drive wires. A search revealed that CN222623432U discloses a micro-diameter flexible joint for peritoneal dialysis catheters, including independently controllable proximal and distal joints. Multiple bending deformation transmission strips are pushed and pulled to bend the corresponding joints, thereby assisting in adjusting the position of the peritoneal dialysis catheter. This solution can also set a visual module at the end of the flexible joint to assist in observing the intra-abdominal cavity. The active bending of the peritoneal dialysis catheter by setting a slender transmission component that can transmit pushing and pulling forces has become a feasible technical approach.

[0004] However, peritoneal dialysis catheters need to pass through skin incisions and subcutaneous tunnels during implantation, and they also need to remain in the patient's body for a long period of time after implantation. If the control mechanism used for active adjustment is an inseparable whole with the peritoneal dialysis catheter, the control structure such as the push handle, push rod, and shell will easily increase the external size of the catheter placement component when passing through the subcutaneous tunnel, increasing the difficulty of passage and traction operations. On the other hand, if the adjustment structure is completely removed after implantation, it is not conducive to active repositioning after the catheter drifts. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an anti-drift peritoneal dialysis device with integrated posture sensing, which solves the problem that existing peritoneal dialysis catheters, when possessing multi-directional active adjustment capabilities, tend to increase the size of the adjustment mechanism during implantation and make it more difficult to pass through the subcutaneous tunnel.

[0006] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0007] An integrated posture-sensing anti-drift peritoneal dialysis device includes a peritoneal dialysis catheter body and a controller. The peritoneal dialysis catheter body has a first through hole and a second through hole eccentrically positioned at different circumferential locations. A first guidewire and a second guidewire are respectively inserted into the corresponding through holes, and their distal ends form a force transmission connection with the distal end of the peritoneal dialysis catheter body. The controller is detachably connected to the proximal end of the peritoneal dialysis catheter body and is detachably connected to the proximal ends of the first guidewire and the second guidewire, respectively, to drive the two guidewires to move axially, causing the peritoneal dialysis catheter body to bend in different bending planes.

[0008] In one embodiment, the eccentric directions of the first through hole and the second through hole are perpendicular to each other. The first guidewire bends the peritoneal dialysis catheter body in the opposite direction in the first bending plane by pulling and pushing, and the second guidewire bends the peritoneal dialysis catheter body in the opposite direction in the second bending plane by pulling and pushing.

[0009] Preferably, the distal ends of the first guide wire and the second guide wire are respectively connected to a first plug and a second plug, and the first plug and the second plug are respectively fixed to the distal ends of the first through hole and the second through hole.

[0010] In one embodiment, the first plug and the second plug are respectively provided with inner holes for the corresponding guide wires to pass through, the inner holes of each plug and the corresponding guide wires are in an interference fit, and the outer periphery of each plug and the corresponding through hole are in an interference fit.

[0011] In one embodiment, the controller includes a first push rod and a second push rod. The first push rod is detachably connected to a first guide wire, and the second push rod is detachably connected to a second guide wire. The first push rod and the second push rod can respectively drive the corresponding guide wire to move axially.

[0012] In one embodiment, the proximal end of the first guidewire is provided with a square limiting piece and a first limiting hole, and the proximal end of the second guidewire is provided with a circular limiting piece and a second limiting hole; the first push rod is provided with a first limiting pin that mates with the first limiting hole, and the second push rod is provided with a second limiting pin that mates with the second limiting hole.

[0013] Preferably, the first push rod is provided with a first control block, a first spring, a first guide hole and a first guide pin, a first limiting pin is disposed on the first control block, and the first guide pin cooperates with the first guide hole and is used to drive the first control block to move; the second push rod is provided with a second control block, a second spring, a second guide hole and a second guide pin, a second limiting pin is disposed on the second control block, and the second guide pin cooperates with the second guide hole and is used to drive the second control block to move; the first spring and the second spring are respectively used to reset the corresponding control blocks.

[0014] In one embodiment, the controller includes an upper housing, a lower housing, a first push handle, a second push handle, a first connector, and a second connector. The upper housing and the lower housing are connected to form a first guide groove and a second guide groove. The first push rod and the second push rod are respectively disposed in the corresponding guide grooves. The first push handle and the second push handle drive the corresponding push rod to move through the first connector and the second connector, respectively. The lower housing is provided with a connection hole for inserting the proximal end of the peritoneal dialysis tube.

[0015] In a preferred embodiment, the peritoneal dialysis catheter body is provided with a third through hole, and a three-dimensional shape sensing optical fiber is inserted into the third through hole. Its distal end is fixed to the distal end of the third through hole by a third plug, and its proximal end is used to connect with a decoder to obtain the bending orientation and angle of the peritoneal dialysis catheter body.

[0016] In another preferred embodiment, the peritoneal dialysis catheter has a first slot, a second slot, and a third slot at its proximal end. After the controller is disassembled, the proximal ends of the first guidewire, the second guidewire, and the three-dimensional shape sensing fiber are fixed in the first slot, the second slot, and the third slot, respectively.

[0017] (III) Beneficial Effects This invention provides an anti-drift peritoneal dialysis device with integrated pose sensing. Compared with the prior art, it has the following advantages: This invention provides a peritoneal dialysis catheter with a first and a second through hole eccentrically positioned at different circumferential locations within the catheter body. A first guidewire and a second guidewire, respectively, are installed within these through holes to form a force-transmitting connection with the distal end of the catheter. This allows the controller to change the bending state of the peritoneal dialysis catheter in different bending planes by driving the two guidewires axially. This gives the peritoneal dialysis catheter multi-directional active adjustment capability. The controller, the peritoneal dialysis catheter body, and the two guidewires are all detachably connected, allowing the peritoneal dialysis catheter to remain separated from the controller when passing through a subcutaneous tunnel. The controller can be reconnected for adjustment after passage or when catheter drift occurs and repositioning is required. This approach retains the active adjustment capability while reducing the overall dimensions of the peritoneal dialysis catheter when passing through a subcutaneous tunnel, reducing the difficulty of catheter placement and minimizing tissue trauma caused by enlarged incisions or subcutaneous tunnels.

[0018] The first and second guidewires can generate opposite bending moments in their respective bending planes through traction and pushing, enabling multi-directional adjustment of the peritoneal dialysis catheter body using the two guidewires. This reduces the cross-sectional space occupied by separate traction components for different bending directions. At the same time, the first and second plugs form a stable force transmission connection between the guidewire and the distal end of the corresponding through hole. The limiting pin, limiting hole, control block, guide pin, and spring in the controller can reliably lock and quickly release the push rod and the corresponding guidewire, allowing the controller to stably transmit traction and pushing forces to the guidewire during adjustment and to easily disconnect from the guidewire after adjustment.

[0019] The peritoneal dialysis catheter has a third through-hole. A three-dimensional shape sensing fiber extends along the third through-hole and forms a corresponding bending shape with the peritoneal dialysis catheter. The decoder connected to it can obtain the bending orientation, bending angle and spatial bending shape of the peritoneal dialysis catheter, so that the operator can determine the subsequent adjustment direction and degree based on the change in the shape of the catheter before and after adjustment, thereby improving the controllability of the active reset process. After the controller is removed, the proximal ends of the first guidewire, the second guidewire and the three-dimensional shape sensing fiber can be fixed in the corresponding slots, so that each slender component is kept relatively retracted in the non-reset state, and the conditions for reconnecting the controller and decoder for reset are reserved. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the overall structure of a peritoneal dialysis device with integrated posture sensing and anti-drift tubing. Figure 2 A schematic diagram of the exploded structure of an anti-drift tube peritoneal dialysis device with integrated posture sensing; Figure 3 This is a schematic diagram of the structure of a wire-controlled peritoneal dialysis catheter; Figure 4 This is a schematic diagram of the peritoneal dialysis catheter. Figure 5 This is a schematic diagram of the partial structure of the proximal end of the first guidewire; Figure 6 This is a schematic diagram of the local structure of the proximal end of the second guidewire; Figure 7 This is a schematic diagram of the controller structure; Figure 8 This is a schematic diagram of the exploded structure of the controller; Figure 9 This is a schematic diagram of the assembly structure of the upper and lower housings of the controller; Figure 10 This is a schematic diagram of the exploded structure of the first push rod; Figure 11 This is a schematic diagram of the structure of the first rod; Figure 12 This is a schematic diagram of the structure of the first control block; Figure 13 This is a schematic diagram of the structure of the first end cap; Figure 14 This is a schematic diagram of the exploded structure of the second push rod; Figure 15 This is a schematic diagram of the second rod. Figure 16 This is a schematic diagram of the structure of the second control block; Figure 17 This is a schematic diagram of the second end cap. Figure 18 This is a schematic diagram of the structure of the first plug.

[0022] The attached figures are labeled as follows: 1. Wire-controlled peritoneal dialysis catheter; 2. Controller; 3. First push handle; 4. Upper shell; 5. First connector; 6. First push rod; 7. Second push rod; 8. Second connector; 9. Second push handle; 10. Lower shell; 11. First guidewire; 12. Second guidewire; 13. Peritoneal dialysis catheter body; 14. Three-dimensional shape sensing fiber optic cable; 15. Second plug; 16. Third plug; 17. First plug; 18. Scale line; 19. First slot; 20. Second slot; 21. Third slot; 22. Outer polyester sleeve; 23. Inner polyester sleeve; 24. Fluid exchange port; 25. Second through hole; 26. Third through hole; 27. First through hole; 28. Square limiting plate; 29. ​​First limiting hole; 30. Circular limiting plate ; 31. Second limiting hole; 32. Connecting hole; 33. First sliding groove; 34. Second sliding groove; 35. First guide groove; 36. Second guide groove; 37. First end cap; 38. First rod; 39. First spring; 40. First control block; 41. First positioning block; 42. First spring pin; 43. Cuboid cavity; 44. First guide hole; 45. First guide pin; 46. Second spring pin; 47. First limiting pin; 48. Second end cap; 49. Second rod; 50. Second spring; 51. Second control block; 52. Second positioning block; 53. Third spring pin; 54. Cylindrical cavity; 55. Second guide hole; 56. Second guide pin; 57. Fourth spring pin; 58. Second limiting pin. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 Reference Figure 1-4 This embodiment provides an anti-drift peritoneal dialysis device with integrated posture sensing, including a wire-controlled peritoneal dialysis tubing 1 and a controller 2. The wire-controlled peritoneal dialysis tubing 1 includes a peritoneal dialysis tubing body 13, a first guidewire 11 and a second guidewire 12. The peritoneal dialysis tubing body 13 is used to form a passage for peritoneal dialysis fluid to enter and exit the peritoneal cavity. The controller 2 is used to drive the first guidewire 11 and the second guidewire 12 to move when the peritoneal dialysis tubing body 13 needs to be adjusted.

[0025] The peritoneal dialysis catheter body 13 is provided with a first through hole 27 and a second through hole 25 extending along its length. The first through hole 27 and the second through hole 25 are both eccentrically arranged relative to the central axis of the peritoneal dialysis catheter body 13, and they are located at different circumferential positions of the peritoneal dialysis catheter body 13. The first guide wire 11 passes through the first through hole 27, and the second guide wire 12 passes through the second through hole 25.

[0026] The distal ends of the first guidewire 11 and the second guidewire 12 are respectively connected to the distal end of the peritoneal dialysis catheter body 13 for force transmission. When the first guidewire 11 or the second guidewire 12 moves along the axial direction of the corresponding through hole, the axial force generated by the guidewire can be transmitted to the distal end of the peritoneal dialysis catheter body 13. Since the first through hole 27 and the second through hole 25 are eccentrically set relative to the central axis of the peritoneal dialysis catheter body 13, there is an eccentric distance between the position of the corresponding guidewire and the central axis of the peritoneal dialysis catheter body 13, so that the axial force of the guidewire can generate a bending moment at the distal end of the peritoneal dialysis catheter body 13, causing the peritoneal dialysis catheter body 13 to bend.

[0027] The first through hole 27 and the second through hole 25 are located at different circumferential positions of the peritoneal dialysis catheter body 13, so that the eccentric effect generated by the first guidewire 11 and the second guidewire 12 corresponds to different bending planes. Therefore, by driving the first guidewire 11 and the second guidewire 12 to move axially respectively, the bending state of the peritoneal dialysis catheter body 13 in different directions can be adjusted, thereby improving the ability of the peritoneal dialysis catheter body 13 to actively adjust in multiple directions within the peritoneal cavity.

[0028] The controller 2 is detachably connected to the proximal end of the peritoneal dialysis catheter body 13 and is detachably connected to the proximal ends of the first guidewire 11 and the second guidewire 12, respectively. When it is necessary to adjust the peritoneal dialysis catheter body 13, the controller 2 is installed at the proximal end of the peritoneal dialysis catheter body 13 and the controller 2 is connected to the first guidewire 11 and the second guidewire 12, respectively. The controller 2 drives the two guidewires to move axially along the corresponding through holes to change the bending state of the distal end of the peritoneal dialysis catheter body 13. After the adjustment is completed, the first guidewire 11 and the second guidewire 12 can be disconnected from the controller 2, and the controller 2 can be removed from the proximal end of the peritoneal dialysis catheter body 13.

[0029] During peritoneal dialysis catheter implantation, the peritoneal dialysis catheter body 13 needs to enter the peritoneal cavity through a skin incision and subcutaneous tunnel. The controller 2 is equipped with a push handle, push rod, and housing for driving the first guidewire 11 and the second guidewire 12. Its external dimensions are larger than the peritoneal dialysis catheter body 13. If the controller 2 and the peritoneal dialysis catheter body 13 are fixed as an inseparable whole, the larger controller 2 needs to pass through the subcutaneous tunnel with the peritoneal dialysis catheter body 13 during catheter placement, which increases the difficulty of passage and traction operation and may require enlarging the incision or subcutaneous tunnel, increasing tissue trauma to the patient.

[0030] After the controller 2 is detachably connected to the peritoneal dialysis catheter body 13, during the stage when the peritoneal dialysis catheter body 13 passes through the subcutaneous tunnel, the controller 2 can be kept separate from the peritoneal dialysis catheter body 13, allowing the peritoneal dialysis catheter body 13 to complete the subcutaneous tunnel passage with a smaller passing shape. After the subcutaneous tunnel passage is completed, when it is necessary to actively adjust the peritoneal dialysis catheter body 13, the controller 2 is then installed at the proximal end of the peritoneal dialysis catheter body 13. While retaining the active adjustment capability of the peritoneal dialysis catheter, this avoids increasing the external size of the peritoneal dialysis catheter when passing through the subcutaneous tunnel, which helps to reduce the difficulty of catheter placement and reduce tissue trauma caused by enlarging the incision or subcutaneous tunnel.

[0031] After the repositioning operation is completed, the controller 2 can be removed from the proximal end of the peritoneal dialysis catheter body 13 again, so that the controller 2 does not need to be kept outside the patient for a long time in the non-repositioned state. At the same time, the first guidewire 11 and the second guidewire 12 are still retained on the peritoneal dialysis catheter body 13 so that the controller 2 can be reconnected for adjustment when needed. Therefore, this detachable structure takes into account both the passability during the peritoneal dialysis catheter implantation stage and the convenience of use during the long-term indwelling stage.

[0032] The peritoneal dialysis catheter body 13 is also provided with a liquid exchange port 24, an inner polyester sleeve 23, an outer polyester sleeve 22, and a scale line 18. The liquid exchange port 24 is used for exchanging peritoneal dialysis fluid. The inner polyester sleeve 23 and the outer polyester sleeve 22 are set at corresponding positions on the peritoneal dialysis catheter body 13. The scale line 18 is set at the proximal end of the peritoneal dialysis catheter body 13 to help determine the position of the controller 2 installed on the peritoneal dialysis catheter body 13.

[0033] Example 2 Reference Figure 3 , Figure 4 and Figure 18 This embodiment further illustrates the force transmission structure between the first guidewire 11, the second guidewire 12 and the peritoneal dialysis catheter body 13, as well as the bidirectional bending method of the peritoneal dialysis catheter body 13, based on embodiment 1.

[0034] The distal end of the first guide wire 11 is connected to a first plug 17, which is fixed to the distal end of the first through hole 27. The distal end of the second guide wire 12 is connected to a second plug 15, which is fixed to the distal end of the second through hole 25, so that the first guide wire 11 forms a force transmission connection with the distal end of the first through hole 27 through the first plug 17, and the second guide wire 12 forms a force transmission connection with the distal end of the second through hole 25 through the second plug 15.

[0035] The first plug 17 and the second plug 15 are respectively provided with inner holes. The inner hole of the first plug 17 forms a fixed fit with the first guide wire 11, and the inner hole of the second plug 15 forms a fixed fit with the second guide wire 12. At the same time, the outer periphery of the first plug 17 forms a fixed fit with the first through hole 27, and the outer periphery of the second plug 15 forms a fixed fit with the second through hole 25. This allows the axial force generated when the first guide wire 11 and the second guide wire 12 are pulled or pushed to be transmitted to the eccentric position at the distal end of the peritoneal dialysis catheter body 13 through the first plug 17 and the second plug 15, respectively. This provides a stable force transmission path for converting the axial movement of the guide wire into the bending movement of the peritoneal dialysis catheter body 13.

[0036] In one specific embodiment, the inner diameters of the first plug 17 and the second plug 15 are slightly smaller than the outer diameters of the corresponding guide wires, so that the inner diameters of each plug and the corresponding guide wires form an interference fit; the outer diameters of the first plug 17 and the second plug 15 are slightly larger than the diameters of the corresponding through holes, so that the outer circumferences of each plug and the corresponding through holes form an interference fit. The inner diameter of the plug can be 0.1 mm smaller than the outer diameter of the corresponding guide wire, and the outer diameter of the plug can be 0.1 mm larger than the diameter of the corresponding through hole. The specific dimensions can be set according to the material properties, structural dimensions, and fitting requirements of each component.

[0037] The first guide wire 11 extends along the first through hole 27, and the second guide wire 12 extends along the second through hole 25. The corresponding through holes constrain the extension path and axial movement direction of the guide wires, so that the guide wires can still transmit axial force along the direction of the corresponding through holes when subjected to pushing action, thereby reducing the influence of excessive lateral displacement of the guide wires on axial force transmission during the pushing process.

[0038] The first guidewire 11 and the second guidewire 12 have axial stiffness that can transmit tensile and pushing forces along the corresponding through holes, and flexibility that allows the peritoneal dialysis catheter body 13 to bend. The diameter of the corresponding through hole is adapted to the outer diameter of the guidewire, allowing the guidewire to move axially along the through hole while restricting the lateral displacement of the guidewire, so that when the guidewire is pushed, it can transmit axial force to the distal end along the corresponding through hole.

[0039] In this embodiment, the eccentric directions of the first through hole 27 and the second through hole 25 are perpendicular to each other. When the first guidewire 11 moves proximally and pulls the first plug 17, the first plug 17 applies an axial force to the eccentric position at the distal end of the first through hole 27, causing the peritoneal dialysis catheter body 13 to generate a bending moment in the corresponding direction, so as to bend in one direction within the first bending plane. When the first guidewire 11 moves in the opposite direction and pushes the first plug 17, the direction of the axial force acting on the same eccentric position changes, causing the peritoneal dialysis catheter body 13 to generate a bending moment in the opposite direction, so as to bend in the opposite direction within the first bending plane.

[0040] The second guidewire 12 uses the same force transmission method as the first guidewire 11. When the second guidewire 12 pulls the second plug 15, the peritoneal dialysis catheter body 13 bends in one direction in the second bending plane corresponding to the second through hole 25. When the second guidewire 12 pushes the second plug 15, the peritoneal dialysis catheter body 13 bends in the opposite direction in the second bending plane. Since the first through hole 27 and the second through hole 25 are located in different eccentric directions, the first guidewire 11 and the second guidewire 12 can control the bidirectional bending in two different bending planes, so as to realize the multi-directional active adjustment of the peritoneal dialysis catheter body 13 by using two guidewires.

[0041] With the above structure, a single guidewire can control two opposite bends within a bending plane by pulling and pushing. When the two guidewires act on different eccentric positions, they can jointly achieve adjustment within two different bending planes. There is no need to set up independent traction components for each bending direction, which is beneficial to forming a multi-directional adjustment structure within the limited cross-sectional space of the peritoneal dialysis catheter body 13.

[0042] Reference Figure 7-9The directions of up, down, left, and right are used to indicate the relative relationship when the first guidewire 11 and the second guidewire 12 drive the peritoneal dialysis catheter body 13 to produce different bending directions. After the peritoneal dialysis catheter body 13 is implanted into the human body, its actual bending direction is determined by the spatial posture of the peritoneal dialysis catheter body 13 itself and the position of the first through hole 27 and the second through hole 25 relative to the central axis of the peritoneal dialysis catheter body 13.

[0043] Example 3 Reference Figure 5-17 This embodiment further illustrates the specific structure of the controller 2 and the detachable connection between the controller 2 and the first guide wire 11 and the second guide wire 12, based on the above embodiments.

[0044] The controller 2 includes a first push handle 3, a second push handle 9, a first connector 5, a second connector 8, a first push rod 6, a second push rod 7, an upper housing 4, and a lower housing 10. The upper housing 4 is provided with a first sliding groove 33, and the lower housing 10 is provided with a connecting hole 32. The upper housing 4 and the lower housing 10 are connected by a snap-fit ​​structure, and after assembly, a second sliding groove 34, a first guide groove 35, and a second guide groove 36 are formed. The first push rod 6 and the second push rod 7 are respectively disposed in the first guide groove 35 and the second guide groove 36, so that the first push rod 6 and the second push rod 7 can move in a predetermined direction.

[0045] The first push rod 6 includes a first end cap 37, a first rod body 38, a first spring 39, and a first control block 40. One end of the first rod body 38 is provided with a cuboid cavity 43, and the other end is provided with a first positioning block 41. The cuboid cavity 43 is provided with a first guide hole 44 and a first spring pin 42. The first control block 40 is provided with a first limiting pin 47, a first guide pin 45, and a second spring pin 46. The first spring 39 is disposed between the first rod body 38 and the first control block 40, and cooperates with the first spring pin 42 and the second spring pin 46 respectively.

[0046] The first guide wire 11 is provided with a square limiting piece 28 and a first limiting hole 29 at its proximal end. The square limiting piece 28 can be inserted into the cuboid cavity 43 of the first push rod 6. When the square limiting piece 28 enters the predetermined position, the first limiting pin 47 enters the first limiting hole 29 to restrict the first guide wire 11 from axially separating from the first push rod 6, so that the first push rod 6 can transmit pulling force and pushing force to the first guide wire 11.

[0047] The first guide pin 45 engages with the first guide hole 44. When the first guide pin 45 is pressed, the first guide pin 45 drives the first control block 40 to move along the direction defined by the first guide hole 44, and drives the first limit pin 47 to exit the first limit hole 29. At this time, the square limit piece 28 can exit from the cuboid cavity 43 to release the connection between the first guide wire 11 and the first push rod 6. After the pressing is released, the first spring 39 drives the first control block 40 to reset, so that the first limit pin 47 returns to the position where it can engage with the first limit hole 29 again.

[0048] The second push rod 7 includes a second end cap 48, a second rod body 49, a second spring 50, and a second control block 51. One end of the second rod body 49 is provided with a cylindrical cavity 54, and the other end is provided with a second positioning block 52. The cylindrical cavity 54 is provided with a second guide hole 55 and a third spring pin 53. The second control block 51 is provided with a second limiting pin 58, a second guide pin 56, and a fourth spring pin 57. The proximal end of the second guide wire 12 is provided with a circular limiting piece 30 and a second limiting hole 31. The second spring 50 is disposed between the second rod body 49 and the second control block 51, and cooperates with the third spring pin 53 and the fourth spring pin 57 respectively.

[0049] After the circular limiting piece 30 is inserted into the cylindrical cavity 54 of the second push rod 7, the second limiting pin 58 enters the second limiting hole 31, so that the second push rod 7 and the second guide wire 12 form a connection that can transmit pulling force and pushing force; the second guide pin 56 cooperates with the second guide hole 55. When the second guide pin 56 is pressed, the second guide pin 56 drives the second control block 51 to move along the direction defined by the second guide hole 55, and drives the second limiting pin 58 to exit the second limiting hole 31, so as to release the connection between the second guide wire 12 and the second push rod 7; after the pressing is released, the second spring 50 drives the second control block 51 to reset.

[0050] Through the above structure, the first limiting pin 47 and the first limiting hole 29, and the second limiting pin 58 and the second limiting hole 31 respectively undertake the axial locking function between the corresponding push rod and the guide wire, so that the controller 2 can transmit bidirectional axial force to the first guide wire 11 and the second guide wire 12; the first guide pin 45, the second guide pin 56 and the corresponding control block are used to unlock, and the first spring 39 and the second spring 50 are used to reset the corresponding control block, so that the two guide wires can be reliably connected to the controller 2 during adjustment and can be easily disconnected after adjustment.

[0051] The first positioning block 41 of the first push rod 6 is connected to the first connector 5, the first connector 5 is connected to the first push handle 3, the second positioning block 52 of the second push rod 7 is connected to the second connector 8, and the second connector 8 is connected to the second push handle 9. Therefore, when the first push handle 3 is pushed, the first guide wire 11 can be moved axially through the first connector 5 and the first push rod 6. When the second push handle 9 is pushed, the second guide wire 12 can be moved axially through the second connector 8 and the second push rod 7, so that the operating displacement applied by the operator to the push handle is transmitted to the two guide wires respectively.

[0052] The first slide groove 33 and the second slide groove 34 can be provided with a groove array on both sides, so that the first push handle 3 and the second push handle 9 generate a certain damping feedback during the movement. The surfaces of the first push handle 3 and the second push handle 9 can be provided with anti-slip grooves to improve the stability of the operator pushing the push handle.

[0053] The lower housing 10 is provided with a connection hole 32, into which the proximal end of the peritoneal dialysis catheter body 13 can be inserted, so that the controller 2 maintains a predetermined operating position relative to the peritoneal dialysis catheter body 13. The scale line 18 provided on the peritoneal dialysis catheter body 13 can be used to help determine the installation position of the controller 2. In one specific embodiment, the diameter of the connection hole 32 is slightly smaller than the outer diameter of the peritoneal dialysis catheter body 13, so that the peritoneal dialysis catheter body 13 forms a tighter fit with the connection hole 32 after being inserted into it, thereby improving the connection stability between the controller 2 and the peritoneal dialysis catheter body 13 and helping to maintain the installation position of the controller 2 during the adjustment process.

[0054] The controller 2 is detachably connected to the peritoneal dialysis catheter body 13. During the stage when the peritoneal dialysis catheter body 13 passes through the subcutaneous tunnel, the controller 2 does not need to pass through the peritoneal dialysis catheter body 13 together. After the subcutaneous tunnel is completed, when it is necessary to adjust the peritoneal dialysis catheter body 13, the controller 2 is then connected to the proximal end of the peritoneal dialysis catheter body 13. This ensures that the large external dimensions of the internal push handle, push rod and shell of the controller 2 do not increase the external dimensions of the peritoneal dialysis catheter when passing through the subcutaneous tunnel, which helps to reduce the difficulty of catheter placement and reduce tissue trauma caused by enlarging the subcutaneous tunnel.

[0055] After adjustment, disconnect the first guidewire 11, the second guidewire 12 and the corresponding push rod, and remove the controller 2 from the proximal end of the peritoneal dialysis catheter body 13. This allows the controller 2 to be installed when active adjustment of the peritoneal dialysis catheter body 13 is required, and removed after adjustment, thus preventing the controller 2 from being kept outside the patient's body for a long time in an unadjusted state.

[0056] Example 4 Reference Figure 1-4 and Figure 7-9This embodiment further incorporates a three-dimensional shape sensing fiber 14 based on the above embodiment, and describes the usage methods of peritoneal dialysis catheter implantation, active repositioning, and non-repositioning states.

[0057] The peritoneal dialysis catheter body 13 has a third through hole 26 extending along its length. A three-dimensional shape sensing fiber 14 is inserted into the third through hole 26. The distal end of the three-dimensional shape sensing fiber 14 is connected to a third plug 16, which is fixed to the distal end of the third through hole 26. The proximal end of the three-dimensional shape sensing fiber 14 is used to connect with a matching decoder.

[0058] The third through-hole 26 extends along the length of the peritoneal dialysis catheter body 13 and constrains the extension path of the three-dimensional shape sensing fiber 14, enabling the three-dimensional shape sensing fiber 14 to form a corresponding bending shape as the peritoneal dialysis catheter body 13 bends. When the peritoneal dialysis catheter body 13 bends, the decoder obtains the bending orientation and angle of the peritoneal dialysis catheter body 13 based on the information output by the three-dimensional shape sensing fiber 14. This allows the operator to obtain feedback on the bending state of the catheter body 13 when adjusting it using the first guidewire 11 and the second guidewire 12, and to determine the subsequent operation direction and adjustment degree based on the morphological changes before and after adjustment.

[0059] The first guidewire 11 and the second guidewire 12 are used to apply adjustment to the peritoneal dialysis catheter body 13, and the three-dimensional shape sensing fiber 14 is used to obtain the bending state information of the peritoneal dialysis catheter body 13. The three are respectively set in the first through hole 27, the second through hole 25 and the third through hole 26, so that the bending structure and the shape sensing structure are independent of each other. While the first guidewire 11 and the second guidewire 12 move axially, the bending orientation and angle of the peritoneal dialysis catheter body 13 can be obtained.

[0060] In this embodiment, the pose perception is used to characterize the bending orientation, bending angle and spatial bending shape of the peritoneal dialysis catheter body 13, so as to reflect the morphological changes of the peritoneal dialysis catheter body 13 during the adjustment process.

[0061] During the stage when the peritoneal dialysis catheter body 13 passes through the subcutaneous tunnel, the controller 2 remains separate from the peritoneal dialysis catheter body 13, allowing the peritoneal dialysis catheter body 13 to complete the subcutaneous tunnel passage with a smaller passing shape, avoiding the controller 2 from passing through the subcutaneous tunnel with the peritoneal dialysis catheter body 13, which would increase the difficulty of catheter placement. After the subcutaneous tunnel passage is completed, when it is necessary to adjust the bending state of the peritoneal dialysis catheter body 13, the controller 2 is then installed at the proximal end of the peritoneal dialysis catheter body 13 and connected to the first guidewire 11 and the second guidewire 12 respectively.

[0062] During the repositioning operation, the proximal end of the peritoneal dialysis catheter 13 is inserted into the connection hole 32 of the controller 2, and the position of the controller 2 is adjusted according to the scale line 18. The square limiting piece 28 at the proximal end of the first guidewire 11 is inserted into the first push rod 6, so that the first limiting pin 47 enters the first limiting hole 29. The circular limiting piece 30 at the proximal end of the second guidewire 12 is inserted into the second push rod 7, so that the second limiting pin 58 enters the second limiting hole 31. At the same time, the proximal end of the three-dimensional shape sensing fiber optic cable 14 is connected to the matching decoder.

[0063] In one specific embodiment, the three-dimensional shape sensing fiber 14 adopts a multi-core fiber grating shape sensing fiber. The multi-core fiber has multiple sensing fiber cores distributed circumferentially, and multiple fiber grating sensing positions are set along the length direction of the three-dimensional shape sensing fiber 14. When the peritoneal dialysis catheter body 13 bends, the sensing fiber cores located at different circumferential positions generate different axial strains, causing the reflection center wavelength of the corresponding fiber grating to change accordingly. The matching decoder determines the curvature and bending direction of the corresponding position according to the wavelength change of each sensing fiber core, and reconstructs its spatial bending shape based on the multiple curvature information obtained along the length direction of the three-dimensional shape sensing fiber 14 to obtain the bending orientation and angle of the peritoneal dialysis catheter body 13.

[0064] When it is necessary to adjust the bending state of the peritoneal dialysis catheter body 13 in the first bending plane, the first push rod 6 and the first guide wire 11 are driven to move axially through the first push handle 3, so that the first guide wire 11 pulls or pushes the first plug 17; when it is necessary to adjust the bending state of the peritoneal dialysis catheter body 13 in the second bending plane, the second push rod 7 and the second guide wire 12 are driven to move axially through the second push handle 9, so that the second guide wire 12 pulls or pushes the second plug 15.

[0065] During the repositioning process, the first guidewire 11 and the second guidewire 12 can be driven separately or alternately based on the bending orientation and angle information of the peritoneal dialysis catheter body 13 obtained by the three-dimensional shape sensing fiber 14. During the adjustment process, the bending state changes of the peritoneal dialysis catheter body 13 are continuously acquired, so that the operator can determine the subsequent adjustment direction and degree based on the morphological changes after each adjustment, thereby improving the controllability of the active repositioning process of the peritoneal dialysis catheter body 13.

[0066] After completing the reset operation, press the first guide pin 45 to make the first limiting pin 47 exit the first limiting hole 29 and disconnect the connection between the first guide wire 11 and the first push rod 6. Then press the second guide pin 56 to make the second limiting pin 58 exit the second limiting hole 31 and disconnect the connection between the second guide wire 12 and the second push rod 7. Then remove the controller 2 from the proximal end of the peritoneal dialysis catheter body 13.

[0067] The peritoneal dialysis catheter body 13 is provided with a first slot 19, a second slot 20 and a third slot 21 at its proximal end. When no resetting operation is required, the square limiting piece 28 at the proximal end of the first guidewire 11 is fixed to the first slot 19, the circular limiting piece 30 at the proximal end of the second guidewire 12 is fixed to the second slot 20, and the proximal end of the three-dimensional shape sensing fiber 14 is fixed to the third slot 21, so that the first guidewire 11, the second guidewire 12 and the three-dimensional shape sensing fiber 14 have corresponding fixed positions after the controller 2 is removed.

[0068] The first slot 19, the second slot 20, and the third slot 21 respectively fix the proximal ends of the first guidewire 11, the second guidewire 12, and the three-dimensional shape sensing fiber optic cable 14, so that the slender components placed on the peritoneal dialysis catheter body 13 remain relatively retracted in the non-reset state, reducing the impact of their free suspension on the patient's daily activities, while preserving the conditions for subsequent reconnection of the controller 2 and the decoder for resetting.

[0069] With the above structure, the peritoneal dialysis catheter body 13 can complete subcutaneous tunneling and long-term placement with the controller 2 removed. When adjustment is required, the controller 2 is reinstalled to drive the first guidewire 11 and the second guidewire 12 to achieve multi-directional bending, and the bending state information is obtained through the three-dimensional shape sensing fiber optic 14. After the adjustment is completed, the controller 2 is removed again to take into account the permeability during the peritoneal dialysis catheter implantation process, the ability to actively reset afterward, and the convenience of use in the long-term placement state.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-drift peritoneal dialysis device with integrated posture sensing, comprising a peritoneal dialysis catheter body (13) and a controller (2), characterized in that: The peritoneal dialysis catheter body (13) is provided with a first through hole (27) and a second through hole (25) eccentrically set at different circumferential positions. The first guide wire (11) and the second guide wire (12) are respectively inserted into the corresponding through holes, and the distal end is connected to the distal end of the peritoneal dialysis catheter body (13) to form a force transmission connection. The controller (2) is detachably connected to the proximal end of the peritoneal dialysis catheter body (13) and detachably connected to the proximal ends of the first guidewire (11) and the second guidewire (12) respectively, so as to drive the two guidewires to move axially and make the peritoneal dialysis catheter body (13) bend in different bending planes.

2. The peritoneal dialysis device with integrated posture sensing as described in claim 1, characterized in that: The eccentric directions of the first through hole (27) and the second through hole (25) are perpendicular to each other. The first guidewire (11) bends the peritoneal dialysis catheter body (13) in the opposite direction in the first bending plane by pulling and pushing. The second guidewire (12) bends the peritoneal dialysis catheter body (13) in the opposite direction in the second bending plane by pulling and pushing.

3. The peritoneal dialysis device with integrated posture sensing as described in claim 1, characterized in that: The distal ends of the first guide wire (11) and the second guide wire (12) are respectively connected to the first plug (17) and the second plug (15), and the first plug (17) and the second plug (15) are respectively fixed to the distal ends of the first through hole (27) and the second through hole (25).

4. The peritoneal dialysis device with integrated pose sensing as described in claim 3, characterized in that: The first plug (17) and the second plug (15) are respectively provided with inner holes for the corresponding guide wires to pass through. The inner hole of each plug forms an interference fit with the corresponding guide wire, and the outer periphery of each plug forms an interference fit with the corresponding through hole.

5. The peritoneal dialysis device with integrated posture sensing as described in claim 1, characterized in that: The controller (2) includes a first push rod (6) and a second push rod (7). The first push rod (6) is detachably connected to the first guide wire (11), and the second push rod (7) is detachably connected to the second guide wire (12). The first push rod (6) and the second push rod (7) can respectively drive the corresponding guide wire to move axially.

6. The peritoneal dialysis device with integrated pose sensing as described in claim 5, characterized in that: The first guide wire (11) is provided with a square limiting piece (28) and a first limiting hole (29) at its proximal end, and the second guide wire (12) is provided with a circular limiting piece (30) and a second limiting hole (31) at its proximal end; the first push rod (6) is provided with a first limiting pin (47) that cooperates with the first limiting hole (29), and the second push rod (7) is provided with a second limiting pin (58) that cooperates with the second limiting hole (31).

7. The peritoneal dialysis device with integrated pose sensing as described in claim 6, characterized in that: The first push rod (6) is provided with a first control block (40), a first spring (39), a first guide hole (44) and a first guide pin (45). A first limit pin (47) is provided on the first control block (40). The first guide pin (45) cooperates with the first guide hole (44) and is used to drive the first control block (40) to move. The second push rod (7) is provided with a second control block (51), a second spring (50), a second guide hole (55) and a second guide pin (56). A second limit pin (58) is provided on the second control block (51). The second guide pin (56) cooperates with the second guide hole (55) and is used to drive the second control block (51) to move. The first spring (39) and the second spring (50) are respectively used to reset the corresponding control blocks.

8. The peritoneal dialysis device with integrated pose sensing as described in claim 5, characterized in that: The controller (2) includes an upper housing (4), a lower housing (10), a first push handle (3), a second push handle (9), a first connector (5), and a second connector (8). After the upper housing (4) and the lower housing (10) are connected, a first guide groove (35) and a second guide groove (36) are formed. The first push rod (6) and the second push rod (7) are respectively set in the corresponding guide grooves. The first push handle (3) and the second push handle (9) drive the corresponding push rod to move through the first connector (5) and the second connector (8), respectively. The lower housing (10) is provided with a connection hole (32) for the proximal end of the peritoneal dialysis tube body (13) to be inserted.

9. The peritoneal dialysis device with integrated posture sensing as described in claim 1, characterized in that: The peritoneal dialysis catheter body (13) is provided with a third through hole (26). A three-dimensional shape sensing optical fiber (14) is inserted into the third through hole (26). Its distal end is fixed to the distal end of the third through hole (26) through a third plug (16), and its proximal end is used to connect with a decoder to obtain the bending orientation and angle of the peritoneal dialysis catheter body (13).

10. The peritoneal dialysis device with integrated pose sensing as described in claim 9, characterized in that: The peritoneal dialysis catheter body (13) is provided with a first slot (19), a second slot (20) and a third slot (21) at the proximal end. After the controller (2) is disassembled, the proximal ends of the first guide wire (11), the second guide wire (12) and the three-dimensional shape sensing fiber (14) are respectively fixed in the first slot (19), the second slot (20) and the third slot (21).

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