Peritoneal dialysis catheter

Abstract

This invention provides a peritoneal dialysis catheter, including a catheter body, a mounting base, and a sealing mechanism. A driving assembly moves a sealing bulb, a first balloon, and a second balloon. When the sealing bulb and the first balloon reach the first end, the second balloon is positioned within the through-hole. An inflation assembly then inflates the first and second balloons, sealing the first end and the through-hole. Alcohol is then introduced into the catheter body through the inlet tube to disinfect the inner wall of the catheter body, preventing alcohol from entering the patient's abdominal cavity and the through-hole. After disinfection, the alcohol is drained from the catheter body through the outlet tube. The inflation assembly then contracts the first and second balloons, and the driving assembly moves the sealing bulb into the through-hole to seal it, allowing dialysis to begin. This facilitates disinfection of the inner wall of the catheter body, prevents infection of the patient during dialysis, and improves the safety of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to a peritoneal dialysis catheter. BACKGROUND

[0002] Peritoneal dialysis is to use the peritoneum as a semi-permeable membrane, and to fill the prepared dialysate into the abdominal cavity of the patient through the catheter by gravity. Since there is a concentration gradient of solutes on both sides of the peritoneum, the solutes on the high concentration side move to the low concentration side (diffusion); water moves from the low osmotic side to the high osmotic side (osmosis). Through continuous replacement of the abdominal dialysate, the purpose of removing metabolic products, toxic substances and correcting water and electrolyte balance disorders is achieved.

[0003] In the actual clinical operation process, part of the peritoneal dialysis catheter is exposed outside the patient's body, which is very easy to be infected. Therefore, before dialysis, the peritoneal dialysis catheter needs to be disinfected. However, the existing peritoneal dialysis catheter can only disinfect the outer wall of the peritoneal dialysis catheter when disinfecting, and cannot disinfect the inner wall of the peritoneal dialysis catheter. During the dialysis process, the patient is still susceptible to infection, reducing the safety of the device in use. Therefore, in view of the above technical problems, a peritoneal dialysis catheter is proposed. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a peritoneal dialysis catheter, which can disinfect the inner wall of the catheter body, avoid infection of the patient during dialysis, and improve the safety of the device in use.

[0005] A peritoneal dialysis catheter, comprising:

[0006] A catheter body comprising a first end portion placed in the abdominal cavity and a second end portion located outside the body, the second end portion being connected with a liquid inlet pipe and a liquid outlet pipe through a tee joint;

[0007] A mounting seat is provided on the second end portion, and a through hole is formed in the mounting seat and communicates with the catheter body; and

[0008] A plugging mechanism comprising a sealing ball, a driving assembly and an inflation assembly, the sealing ball being arranged in the through hole and capable of sealing the through hole, a traction rope and a traction tube being arranged on the sealing ball, a first air bag and a second air bag being arranged in communication on the traction tube, the driving assembly being arranged on the mounting seat and connected with the traction rope and the traction tube, the driving assembly being capable of driving the sealing ball and the first air bag to move into the first end portion, and capable of moving the second air bag into the through hole, the inflation assembly being in communication with the traction tube, and the inflation assembly being capable of inflating the first air bag and the second air bag to seal the first end portion and the through hole.

[0009] The peritoneal dialysis catheter has the beneficial effects that:

[0010] When the inner wall of the catheter body needs to be disinfected, the sealing ball is driven to move by the driving assembly, the sealing ball moves to drive the first air bag and the second air bag to move through the traction tube, when the sealing ball moves to the first end portion, the first air bag is located in the first end portion and the second air bag is located in the through hole, then the first air bag and the second air bag are inflated by the inflation assembly, at this time, the first air bag and the second air bag can seal the first end portion and the through hole, then the alcohol is input into the catheter body from the liquid inlet pipe to disinfect the inner wall of the catheter body, at the same time, the alcohol is prevented from entering the abdominal cavity and the through hole of the patient, after disinfection is completed, the alcohol is discharged from the liquid outlet pipe of the catheter body, then the first air bag and the second air bag are deflated by the inflation assembly, then the sealing ball is driven to move into the through hole by the driving assembly to seal the through hole, and the dialysis operation can be performed. The inner wall of the catheter body is convenient to disinfect, the patient is prevented from being infected during the dialysis process, and the safety of the device is improved.

[0011] In one of the embodiments, the driving assembly comprises a first winding roller, a second winding roller and a first driving member; the mounting seat is provided with a mounting groove communicated with the through hole at the top end, the first winding roller and the second winding roller are rotatably arranged in the mounting groove, the second end portion is provided with a guide hole communicated with the mounting groove along the wall of the catheter body, the free end of the traction rope is slidably penetrated through the guide hole from the second end portion and wound on the first winding roller, the free end of the traction tube is penetrated through the through hole and wound on the second winding roller, the winding directions of the traction rope and the traction tube are opposite, the first driving member is rotatably arranged on the mounting seat and connected with the first winding roller and the second winding roller, and rotating the first driving member can drive the first winding roller and the second winding roller to rotate in the same direction. By rotating the first driving member to drive the first winding roller and the second winding roller to rotate in the same direction, the first winding roller can wind the traction rope and the second winding roller can simultaneously unwind the traction tube, or the first winding roller can unwind the traction rope and the second winding roller can simultaneously wind the traction tube, so that the sealing ball is conveniently driven to move from the through hole to the first end portion or from the first end portion to the through hole, and the movement of the sealing ball is convenient.

[0012] In one of the embodiments, the mounting seat is hingedly provided with a sealing plate, and the sealing plate can seal and shield or open the mounting groove. By sealing the mounting groove, the external pollutants can be prevented from entering the catheter body through the through hole during the movement of the sealing ball.

[0013] In one of the embodiments, the first driving member comprises a worm; the mounting base is provided with a side slot on one side, and the first winding roller and the second winding roller extend into the side slot at one end and are provided with worm gears, and the worm is rotatably arranged in the side slot and meshes with the two sets of worm gears. By rotating the worm to mesh with the two sets of worm gears, the two sets of worm gears can be driven to rotate in the same direction, and the first winding roller and the second winding roller can be driven to rotate in the same direction. The first winding roller and the second winding roller are conveniently driven to rotate in the same direction, and the worm is stopped to mesh with the two sets of worm gears to fix the two sets of worm gears, thereby fixing the first winding roller and the second winding roller, and further fixing the positions of the sealing ball, the first air bag and the second air bag, so as to avoid movement of the sealing ball, the first air bag and the second air bag during disinfection or dialysis.

[0014] In one of the embodiments, the inflation assembly comprises a connecting shaft, a piston and a second driving member; the second winding roller is provided with a coaxial and communicating mounting hole and a piston hole, the connecting shaft is arranged in the mounting hole and can axially slide along the mounting hole, the piston is arranged in the piston hole and can axially and sealingly slide along the piston hole, and is connected with the connecting shaft, the traction tube is communicated between the end of the second winding roller and the end of the piston hole away from the mounting hole, and the second driving member is rotatably arranged on the second winding roller and connected with the connecting shaft, and rotating the second driving member can drive the connecting shaft to slide. By rotating the second driving member to drive the connecting shaft to slide, the connecting shaft can drive the piston to slide, and the piston can input air in the piston hole into the traction tube to expand the first air bag and the second air bag. By rotating the second driving member to drive the connecting shaft to reversely slide, the connecting shaft can reversely drive the piston to slide, and the piston can extract air in the traction tube, so as to contract the first air bag and the second air bag. The expansion and contraction of the first air bag and the second air bag are conveniently driven.

[0015] In one of the embodiments, the mounting hole is provided with a plurality of guide sliding grooves on the side wall, and the connecting shaft is provided with a plurality of guide sliding blocks corresponding to the plurality of guide sliding grooves.

[0016] In one of the embodiments, the second driving member comprises a screw rod; the screw rod is rotatably arranged on the second winding roller, extends into the mounting hole at one end and is threadedly connected with the connecting shaft, and extends out of the mounting base at the other end. By rotating the screw rod to threadedly connect the screw rod with the connecting shaft, the connecting shaft can be driven to slide, the connecting shaft is conveniently driven to slide, and the connecting shaft is fixed by stopping rotating the screw rod to threadedly connect the screw rod with the connecting shaft, and the connecting shaft is conveniently fixed.

[0017] In one embodiment, a cleaning component is also included, which is disposed on the traction tube and located at the end of the first airbag away from the sealing ball, and the cleaning component is capable of contacting the inner wall of the catheter body.

[0018] In one embodiment, the cleaning assembly includes a retaining ring and an elastic sleeve. Both the retaining ring and the elastic sleeve are fitted onto the traction tube. One end of the elastic sleeve is connected to the retaining ring. Multiple sets of cleaning brushes are evenly distributed on the outer surface of the elastic sleeve, and these brushes can contact the inner wall of the catheter body. When the sealing ball and the first balloon move from the through-hole to the first end, the traction tube, through the retaining ring, moves the elastic sleeve to the first end. At this time, the multiple sets of cleaning brushes on the outer surface of the elastic sleeve contact the inner wall of the catheter body. After alcohol disinfection, when the sealing ball and the first balloon move from the first end into the through-hole, the traction tube, through the retaining ring, moves the elastic sleeve from the first end to the through-hole. At this time, the multiple sets of cleaning brushes can move along the inner wall of the catheter body, facilitating the cleaning of dirt and alcohol adhering to the inner wall of the catheter body. This prevents dirt from adhering to the inner wall of the catheter body for a long time, affecting the flow rate of the catheter body, and prevents alcohol from entering the patient's abdominal cavity and causing irritation.

[0019] In one embodiment, the fixing ring includes two sets of fixing half-rings, and the elastic sleeve includes two sets of elastic half-sleeves. The two sets of fixing half-rings are respectively connected to the two sets of elastic half-sleeves. One set of fixing half-rings and the elastic half-sleeves are provided with multiple sets of locking pins, and the other set of fixing half-rings and the elastic half-sleeves are provided with multiple sets of locking holes. The multiple sets of locking pins can be engaged in the multiple sets of locking holes. This facilitates the removal of the fixing ring and elastic sleeve from the traction tube, and makes it convenient to replace the elastic sleeve. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a peritoneal dialysis catheter provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The image shown is a front view of a peritoneal dialysis catheter after anatomical dissection.

[0023] Figure 3 for Figure 1 The image shows a front view of a peritoneal dialysis catheter after anatomical dissection in another state.

[0024] Figure 4 for Figure 1 An exploded view of a occlusion mechanism in a peritoneal dialysis catheter is shown.

[0025] Figure 5 for Figure 1 An exploded view of a mounting bracket in a peritoneal dialysis catheter is shown.

[0026] Figure 6 for Figure 1 An exploded view of an air-inflating component in a peritoneal dialysis catheter is shown.

[0027] Figure 7 for Figure 1 An exploded view of a cleaning component in a peritoneal dialysis catheter is shown.

[0028] Figure label:

[0029] 10. Catheter body; 101. First end; 102. Second end; 103. T-joint; 104. Inlet pipe; 105. Drain pipe; 106. Guide hole;

[0030] 20. Mounting base; 201. Through hole; 202. Mounting groove; 203. Sealing plate; 2031. First spring clip; 204. Side groove; 205. Sealing cover; 2051. Second spring clip;

[0031] 30. Blocking mechanism; 301. Traction rope; 302. Traction pipe; 303. First airbag; 304. Sealing ball; 305. Second airbag;

[0032] 40. Drive assembly; 401. First take-up roll; 402. Worm gear; 403. Worm; 404. Second take-up roll; 4041. Mounting hole; 4042. Piston hole; 4043. Guide groove;

[0033] 50. Inflation assembly; 501. Screw; 502. Guide slider; 503. Connecting shaft; 504. Piston;

[0034] 60. Cleaning component; 601. Retaining ring; 602. Cleaning brush; 603. Elastic sleeve; 604. Locking pin; 605. Locking hole. Detailed Implementation

[0035] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0036] Please see Figures 1 to 4 One embodiment of a peritoneal dialysis catheter includes a catheter body 10, a mounting base 20, and a sealing mechanism 30.

[0037] The catheter body 10 includes a first end 101 placed inside the abdominal cavity and a second end 102 located outside the body. The second end 102 is connected to an inlet pipe 104 and an outlet pipe 105 via a three-way pipe 103. A mounting base 20 is disposed at the second end 102, and the mounting base 20 has a through hole 201 communicating with the catheter body 10. The sealing mechanism 30 includes a sealing ball 304, a driving assembly 40, and an inflation assembly 50. The sealing ball 304 is disposed in the through hole 201 and can seal the through hole 201. A traction rope 301 and a traction tube 302 are disposed on the sealing ball 304. A first airbag 303 and a second airbag 305 are disposed on the traction tube 302. The driving assembly 40 is disposed on the mounting base 20 and is connected to the traction rope 301 and the traction tube 302. The driving assembly 40 can drive the sealing ball 304 and the first airbag 303 to move into the first end 101 and can move the second airbag 305 into the through hole 201. The inflation assembly 50 is connected to the traction tube 302 and can inflate the first airbag 303 and the second airbag 305 to seal the first end 101 and the through hole 201.

[0038] Specifically, the drive assembly 40 includes a first take-up roller 401, a second take-up roller 404, and a first drive member; the top of the mounting base 20 has a mounting groove 202 communicating with the through hole 201. The first take-up roller 401 and the second take-up roller 404 are rotatably disposed in the mounting groove 202. The second end 102 has a guide hole 106 communicating with the mounting groove 202 along the tube wall of the guide tube body 10. The free end of the traction rope 301 passes through the guide hole 106 through the second end 102 and is wound on the first take-up roller 401. The free end of the traction tube 302 passes through the through hole 201 and is wound on the second take-up roller 404. The winding directions of the traction rope 301 and the traction tube 302 are opposite. The first drive member is rotatably disposed on the mounting base 20 and is connected to the first take-up roller 401 and the second take-up roller 404. Rotating the first drive member can drive the first take-up roller 401 and the second take-up roller 404 to rotate in the same direction.

[0039] In the above embodiment, when it is necessary to disinfect the inner wall of the catheter body 10, the first winding roller 401 and the second winding roller 404 are driven to rotate in the same direction by rotating the first driving member. The first winding roller 401 and the second winding roller 404 rotating in the same direction can cause the first winding roller 401 to wind up the traction rope 301, and the second winding roller 404 to release the traction tube 302 simultaneously. At this time, the traction rope 301 can drive the sealing ball 304 to move. The movement of the sealing ball 304 drives the first airbag 303 and the second airbag 305 to move through the traction tube 302. When the sealing ball 304 moves into the first end 101, the first airbag 303 is located in the first end 101, and the second airbag 305 is located in the through hole 201. Then, the first airbag 303 and the second airbag 305 are inflated by the inflation component 50. At this time, the first airbag 303 and the second airbag 305 are inflated. The first balloon 305 seals the first end 101 and the through hole 201. Alcohol is then introduced into the catheter body 10 through the inlet tube 104 to disinfect the inner wall of the catheter body 10, while preventing alcohol from entering the patient's abdominal cavity and the through hole 201. After disinfection, the alcohol is discharged from the catheter body 10 through the outlet tube 105. The first and second balloons 303 are then inflated by the inflation assembly 50. The first and second winding rollers 401 and 404 are then rotated in opposite directions by the first drive component. The first winding roller 401 releases the traction rope 301, while the second winding roller 404 simultaneously winds up the traction tube 302. At this point, the traction tube 302 pulls the second balloon 305 and the first balloon 303 out of the catheter body 10, and the sealing ball 304 seals the through hole 201. Dialysis can then be performed. This facilitates disinfection of the inner wall of the catheter body 10, prevents infection of the patient during dialysis, and improves the safety of the device.

[0040] Please refer to the following: Figure 5 Based on the above embodiments, a sealing plate 203 is further hinged to the mounting base 20. The sealing plate 203 can seal and cover or open the mounting groove 202. Specifically, in this embodiment, a first spring clip 2031 is provided on the sealing plate 203, and a first spring clip groove is provided on the mounting base 20 corresponding to the first spring clip 2031. When the sealing plate 203 seals and covers the mounting groove 202, the first spring clip 2031 is engaged in the first spring clip groove. By sealing the mounting groove 202, external contaminants can be prevented from entering the conduit body 10 through the through hole 201 during the movement of the sealing ball 304. When the sealing ball 304 seals the through hole 201, it is also convenient to open the mounting groove 202 to inspect the components inside the mounting groove 202.

[0041] Please see Figure 4In one embodiment, the first driving component includes a worm gear 403; a side groove 204 is provided on one side of the mounting base 20, and one end of the first take-up roller 401 and the second take-up roller 404 extends into the side groove 204, both of which are provided with worm wheels 402. The worm gear 403 is rotatably disposed in the side groove 204 and meshes with the two sets of worm wheels 402. Specifically, in this embodiment, a sealing cover 205 is provided at the opening of the side groove 204 to seal and cover the side groove 204. Multiple sets of second spring clips 2051 are provided opposite to each other on the sealing cover 205, and multiple sets of second spring clip slots are provided on the mounting base 20 corresponding to the multiple sets of second spring clips 2051. The multiple sets of second spring clips 2051 can be locked in the multiple sets of second spring clip slots. By providing the sealing cover 205, it is possible to prevent external debris from entering the side groove 204 and affecting the meshing of the worm gear 403 and the worm wheels 402.

[0042] In the above embodiment, by rotating the worm gear 403 to mesh with the two sets of worm wheels 402, the two sets of worm wheels 402 can be driven to rotate in the same direction. The rotation of the two sets of worm wheels 402 in the same direction can drive the first take-up roller 401 and the second take-up roller 404 to rotate in the same direction. It is convenient to drive the first take-up roller 401 and the second take-up roller 404 to rotate in the same direction. When the worm gear 403 stops rotating, it meshes with the two sets of worm wheels 402 to fix the two sets of worm wheels 402, thereby fixing the first take-up roller 401 and the second take-up roller 404. This facilitates the fixing of the positions of the sealing ball 304, the first airbag 303 and the second airbag 305, and prevents the sealing ball 304, the first airbag 303 and the second airbag 305 from moving during disinfection or dialysis.

[0043] Please see Figure 4 , Figure 6 In one embodiment, the inflation assembly 50 includes a connecting shaft 503, a piston 504, and a second driving member; the second take-up roller 404 has a coaxial and communicating mounting hole 4041 and a piston hole 4042. The connecting shaft 503 is slidably disposed in the mounting hole 4041 along the axial direction of the mounting hole 4041. The piston 504 is slidably disposed in the piston hole 4042 along the axial direction of the piston hole 4042 and is connected to the connecting shaft 503. The traction tube 302 is wound on the end of the second take-up roller 404 and communicates with the end of the piston hole 4042 away from the mounting hole 4041. The second driving member is rotatably disposed on the second take-up roller 404 and is connected to the connecting shaft 503. Rotating the second driving member can drive the connecting shaft 503 to slide.

[0044] Specifically, the mounting hole 4041 has multiple sets of guide grooves 4043 on its sidewall, and the connecting shaft 503 is provided with multiple sets of guide sliders 502 corresponding to the multiple sets of guide grooves 4043. The multiple sets of guide sliders 502 are slidably disposed within the multiple sets of guide grooves 4043. The second driving component includes a screw 501; the screw 501 is rotatably disposed on the second take-up roller 404, one end of the screw 501 extends into the mounting hole 4041 and is threadedly connected to the connecting shaft 503, and the other end of the screw 501 extends outside the mounting base 20.

[0045] In the above embodiment, the connecting shaft 503 can be driven to slide by rotating the screw 501 in thread engagement with the connecting shaft 503. The sliding of the connecting shaft 503 drives the piston 504 to slide. The sliding of the piston 504 allows air from the piston hole 4042 to be introduced into the traction tube 302, causing the first airbag 303 and the second airbag 305 to inflate. The connecting shaft 503 can be driven to slide in the opposite direction by rotating the screw 501 in thread engagement with the connecting shaft 503. The reverse sliding of the connecting shaft 503 drives the piston 504 to slide in the opposite direction. The reverse sliding of the piston 504 allows air to be extracted from the traction tube 302, thereby causing the first airbag 303 and the second airbag 305 to contract. The expansion and contraction of the first airbag 303 and the second airbag 305 are convenient. Furthermore, stopping the rotation of the screw 501 and fixing it in thread engagement with the connecting shaft 503 facilitates the fixation of the expansion and contraction of the first airbag 303 and the second airbag 305.

[0046] Please see Figure 2 , Figure 3 , Figure 7 In one embodiment, a cleaning component 60 is also included. The cleaning component 60 is disposed on the traction tube 302 and located at the end of the first airbag 303 away from the sealing ball 304. The cleaning component 60 can contact the inner wall of the catheter body 10.

[0047] Specifically, the cleaning component 60 includes a retaining ring 601 and an elastic sleeve 603. Both the retaining ring 601 and the elastic sleeve 603 are sleeved on the traction tube 302. One end of the elastic sleeve 603 is connected to the retaining ring 601. Multiple sets of cleaning brushes 602 are evenly arranged on the outer surface of the elastic sleeve 603, and the multiple sets of cleaning brushes 602 can contact the inner wall of the conduit body 10. The retaining ring 601 includes two sets of retaining half-rings, and the elastic sleeve 603 includes two sets of elastic half-sleeves. The two sets of retaining half-rings are respectively connected to the two sets of elastic half-sleeves. Multiple sets of locking pins 604 are provided on one set of retaining half-rings and elastic half-sleeves, and multiple sets of locking holes 605 are provided on the other set of retaining half-rings and elastic half-sleeves, and the multiple sets of locking pins 604 can be locked in the multiple sets of locking holes 605.

[0048] In the above embodiment, when the sealing ball 304 and the first airbag 303 move from the through hole 201 into the first end 101, the traction tube 302 drives the elastic sleeve 603 to move into the first end 101 through the fixing ring 601. At this time, the multiple sets of cleaning brushes 602 on the outer surface of the elastic sleeve 603 contact the inner wall of the catheter body 10. After alcohol disinfection, when the sealing ball 304 and the first airbag 303 move from the first end 101 into the through hole 201, the traction tube 302 drives the elastic sleeve 603 to move from the first end 101 into the through hole 201 through the fixing ring 601. At this time, multiple sets of cleaning brushes 602 can move along the inner wall of the catheter body 10, which facilitates the cleaning of dirt and alcohol adhering to the inner wall of the catheter body 10. This prevents dirt from adhering to the inner wall of the catheter body 10 for a long time, affecting the flow of the catheter body 10, and prevents alcohol from entering the patient's abdominal cavity and causing irritation. Meanwhile, the fixing ring 601 and the elastic sleeve 603 are respectively connected by two sets of fixing half rings and elastic half sleeves, which makes it easy to install the fixing ring 601 and the elastic sleeve 603 on or remove them from the traction tube 302, and makes it convenient to replace the elastic sleeve 603.

[0049] The specific implementation method of the above-mentioned peritoneal dialysis catheter is as follows:

[0050] First, by rotating the worm gear 403 to mesh with the two sets of worm wheels 402, the two sets of worm wheels 402 can be driven to rotate in the same direction. The rotation of the two sets of worm wheels 402 in the same direction can drive the first take-up roller 401 and the second take-up roller 404 to rotate in the same direction. The rotation of the first take-up roller 401 and the second take-up roller 404 in the same direction can cause the first take-up roller 401 to wind up the traction rope 301, and the second take-up roller 404 to release the traction tube 302 simultaneously. At this time, the traction rope 301 can drive the sealing ball 304 to move. The movement of the sealing ball 304 drives the first airbag 303 and the second airbag 305 to move through the traction tube 302. When the sealing ball 304 moves into the first end 101, the first airbag 303 is located in the first end 101, and the second airbag 305 is located in the through hole 201.

[0051] Then, by rotating the screw 501 and threading it with the connecting shaft 503, the connecting shaft 503 can be driven to slide. The sliding of the connecting shaft 503 can drive the piston 504 to slide. The sliding of the piston 504 can input the air in the piston hole 4042 into the traction tube 302, causing the first airbag 303 and the second airbag 305 to inflate, thereby sealing the first end 101 and the through hole 201. Then, alcohol is introduced into the catheter body 10 from the inlet tube 104 to disinfect the inner wall of the catheter body 10, while also preventing alcohol from entering the patient's abdominal cavity and the through hole 201. After disinfection, the alcohol is discharged from the catheter body 10 from the drain tube 105.

[0052] Finally, by reversing the screw 501 and engaging the threaded connection with the connecting shaft 503, the connecting shaft 503 can be driven to slide in the opposite direction. The reverse sliding of the connecting shaft 503 can drive the piston 504 to slide in the opposite direction. The reverse sliding of the piston 504 can extract the air from the traction tube 302, thereby causing the first airbag 303 and the second airbag 305 to contract. Then, by reversing the worm gear 403 and engaging with the two sets of worm wheels 402, the two sets of worm wheels 402 can be driven to rotate in the opposite direction. The reverse rotation of the two sets of worm wheels 402 can drive the first take-up roller 401 and the second take-up roller 404 to rotate in the opposite direction. The reverse rotation of the first take-up roller 401 and the second take-up roller 404 can cause the first take-up roller 401 to release the traction rope 301, and the second take-up roller 404 to simultaneously take up the traction tube 302. At this time, the traction tube 302 can drive the second airbag 305 and the first airbag 303 to exit from the catheter body 10 and cause the sealing ball 304 to seal the through hole 201. Then, the dialysis operation can be performed. This facilitates the disinfection of the inner wall of the catheter body 10, preventing patients from being infected during dialysis and improving the safety of device use.

[0053] 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A peritoneal dialysis catheter, characterized in that, The application relates to a sealing device for a catheter, which comprises the following parts: a catheter body (10) comprising a first end (101) arranged in an abdominal cavity and a second end (102) arranged outside the body, the second end (102) being connected with a liquid inlet pipe (104) and a liquid outlet pipe (105) through a three-way pipe (103); a mounting seat (20) arranged on the second end (102), the mounting seat (20) being provided with a through hole (201) communicated with the catheter body (10); and a sealing mechanism (30) comprising a sealing ball (304), a driving assembly (40) and an inflation assembly (50), the sealing ball (304) being arranged in the through hole (201) and capable of sealing the through hole (201), the sealing ball (304) being provided with a traction rope (301) and a traction pipe (302), the traction pipe (302) being provided with a first air bag (303) and a second air bag (305) communicated with each other, the driving assembly (40) being arranged on the mounting seat (20) and connected with the traction rope (301) and the traction pipe (302), the driving assembly (40) being capable of driving the sealing ball (304) and the first air bag (303) to move into the first end (101) and making the second air bag (305) move into the through hole (201), the inflation assembly (50) being communicated with the traction pipe (302), the inflation assembly (50) being capable of making the first air bag (303) and the second air bag (305) expand to seal the first end (101) and the through hole (201). The driving assembly (40) comprises a first winding roller (401), a second winding roller (404) and a first driving member, the mounting seat (20) is provided with a mounting groove (202) communicated with the through hole (201) at the top end, the first winding roller (401) and the second winding roller (404) are rotatably arranged in the mounting groove (202), the second end (102) is provided with a guide hole (106) communicated with the mounting groove (202) along the pipe wall of the catheter body (10), the free end of the traction rope (301) is slidably penetrated through the guide hole (106) from the second end (102) and wound on the first winding roller (401), the free end of the traction pipe (302) is penetrated through the through hole (201) and wound on the second winding roller (404), the winding directions of the traction rope (301) and the traction pipe (302) are opposite, the first driving member is rotatably arranged on the mounting seat (20) and connected with the first winding roller (401) and the second winding roller (404), and rotating the first driving member can drive the first winding roller (401) and the second winding roller (404) to rotate in the same direction. The mounting seat (20) is hingedly connected with a sealing plate (203), the sealing plate (203) can seal, shield or open the mounting groove (202). ​ 2. A peritoneal dialysis catheter according to claim 1, wherein, ​ 3. A peritoneal dialysis catheter according to claim 2, wherein, ​ 4. The peritoneal dialysis catheter of claim 2, wherein, The first driving member comprises a worm (403); one side of the mounting base (20) is provided with a side slot (204), one end of the first winding roller (401) and the second winding roller (404) extends into the side slot (204), and both are provided with a worm wheel (402); the worm (403) is rotatably arranged in the side slot (204) and is engaged with the two groups of worm wheels (402).

5. The peritoneal dialysis catheter of claim 2, wherein, The inflation assembly (50) comprises a connecting shaft (503), a piston (504) and a second driving member; the second winding roller (404) is provided with a coaxial and communicating mounting hole (4041) and a piston hole (4042); the connecting shaft (503) is arranged in the mounting hole (4041) and can slide axially along the mounting hole (4041); the piston (504) is arranged in the piston hole (4042) and can slide axially along the piston hole (4042) in a sealed manner; the piston (504) is connected with the connecting shaft (503); the traction tube (302) is wound around the end of the second winding roller (404) and the end of the piston hole (4042) away from the mounting hole (4041); the second driving member is rotatably arranged on the second winding roller (404) and connected with the connecting shaft (503); rotating the second driving member can drive the connecting shaft (503) to slide.

6. A peritoneal dialysis catheter according to claim 5, wherein, The side wall of the mounting hole (4041) is provided with a plurality of guide sliding grooves (4043); the connecting shaft (503) is provided with a plurality of guide sliding blocks (502) corresponding to the plurality of guide sliding grooves (4043); the plurality of guide sliding blocks (502) are slidingly arranged in the plurality of guide sliding grooves (4043).

7. A peritoneal dialysis catheter according to claim 5, wherein, The second driving member comprises a screw rod (501); the screw rod (501) is rotatably arranged on the second winding roller (404); one end of the screw rod (501) extends into the mounting hole (4041) and is threadedly connected with the connecting shaft (503); the other end of the screw rod (501) extends out of the mounting base (20).

8. The peritoneal dialysis catheter of claim 1, wherein, The cleaning assembly (60) is arranged on the traction tube (302) and located at the end of the first air bag (303) away from the sealing ball (304); the cleaning assembly (60) can contact the inner wall of the catheter body (10).

9. A peritoneal dialysis catheter according to claim 8, wherein, The cleaning assembly (60) comprises a fixed ring (601) and an elastic sleeve (603); the fixed ring (601) and the elastic sleeve (603) are sleeved on the traction tube (302); one end of the elastic sleeve (603) is connected with the fixed ring (601); the outer surface of the elastic sleeve (603) is uniformly provided with a plurality of cleaning brushes (602); the plurality of cleaning brushes (602) can contact the inner wall of the catheter body (10).

10. A peritoneal dialysis catheter according to claim 9, wherein, The fixing ring (601) comprises two groups of fixing half-rings, the elastic sleeve (603) comprises two groups of elastic half-sleeves, and the two groups of fixing half-rings are connected with the two groups of elastic half-sleeves respectively, wherein a plurality of clamping pins (604) are arranged on one group of the fixing half-rings and the elastic half-sleeves, a plurality of clamping holes (605) are formed on the other group of the fixing half-rings and the elastic half-sleeves, and the plurality of clamping pins (604) can be clamped in the plurality of clamping holes (605).

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