Auxiliary catheter for peritoneal dialysis and using method

Abstract

The invention discloses an auxiliary catheter for peritoneal dialysis and a using method, and belongs to the technical field of medical instruments. Wherein the arc-shaped end of one semicircular pipe is provided with a plurality of protrusions, the arc-shaped end of the other semicircular pipe is provided with a plurality of corresponding grooves, the ends of the semicircular pipes are connected with half-threaded pipes through semi-concentric discs, and the protrusions are buckled into the grooves so that the two semicircular pipes can be connected. Positioning pieces are in threaded connection with the two half-threaded pipes; the outer diameter of the semi-concentric disc is equal to the inner diameter of the semi-threaded pipe; the diameter of the peritoneal dialysis tube is smaller than that of the semicircular tube, and the diameter of the polyester head is larger than that of the semicircular tube and smaller than that of the half-threaded tube. A balloon is installed on the semicircular pipe and comprises a balloon cavity, and a water conveying pipe is arranged on the side, close to the half-threaded pipe, of the balloon cavity. The problem that in the prior art, a first half sheathing canal axially slides relative to a second half sheathing canal and interferes with a polyester head of a peritoneal dialysis catheter is solved, and meanwhile the problem that half sheathing canals lack protective measures can also be solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to an auxiliary catheter for peritoneal dialysis and a use method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] The auxiliary catheter for peritoneal dialysis is applied to a peritoneal dialysis operation, mainly to insert the auxiliary catheter into a micro-invasive opening on the body surface, so that the peritoneal dialysis tube enters the body through the auxiliary catheter, and then the auxiliary catheter is removed while the polyester head (with a size larger than that of the auxiliary catheter) of the peritoneal dialysis tube is sutured together with the subcutaneous tissue. The auxiliary catheter needs to meet the requirements of successful disassembly and separation for removal and no interference with the new tube during removal. The commonly used auxiliary catheter is a detachable sheath tube, which can be torn along the two sides during the placement of the peritoneal dialysis tube. However, this detachable sheath tube has the disadvantage of non-reusability, which increases the clinical use cost.

[0004] To solve the above problems, a mechanism for guiding a peritoneal dialysis catheter is disclosed, which comprises an outer sheath tube composed of a first half sheath tube and a second half sheath tube, and the half sheath tube is composed of a half ring tube and a fan-shaped plate. The outer sheath tube is provided with an outer thread at the rear end, the arc-shaped end face of the first half sheath tube is provided with an axial protrusion, the arc-shaped end face of the second half sheath tube is provided with an axial groove, and the protrusion can be clamped into the groove to axially and slidably fix the first half sheath tube and the second half sheath tube together. When the outer sheath tube is removed, the first half sheath tube is axially slid relative to the second half sheath tube, and the first half sheath tube and the second half sheath tube are sequentially extracted.

[0005] The above scheme solves the problem of non-reusability of the detachable sheath tube, but it has the following problems: Firstly, when the first half sheath tube is axially slid relative to the second half sheath tube and the first half sheath tube and the second half sheath tube are sequentially extracted, interference with the polyester head of the peritoneal dialysis tube will occur. Secondly, the end portions of the first half sheath tube and the second half sheath tube lack protective measures, which can cause damage to internal organs. SUMMARY

[0006] Therefore, the purpose of the present application is to provide an auxiliary catheter for peritoneal dialysis and a use method. The auxiliary catheter of the present application can solve the problem that the first half sheath tube is axially slid relative to the second half sheath tube, which will interfere with the polyester head of the peritoneal dialysis tube, and also solve the technical problem that the end portions of the first half sheath tube and the second half sheath tube lack protective measures, which can cause damage to internal organs.

[0007] To achieve the above purpose, the present application adopts the following technical scheme: The first aspect provides an auxiliary catheter for peritoneal dialysis, which is used for placing a peritoneal dialysis tube, and a dacron head is arranged on the peritoneal dialysis tube; the auxiliary catheter comprises two half-round tubes which can be buckled together; A plurality of protrusions are arranged on the arc-shaped end of one half-round tube, and a plurality of corresponding grooves are arranged on the arc-shaped end of the other half-round tube; the end of each half-round tube is connected to a half-threaded tube through a half-concentric disc; the protrusions are buckled into the grooves to connect the two half-round tubes; and a positioning member is threadedly connected to the two half-threaded tubes; The outer diameter of the half-concentric disc is equal to the inner diameter of the half-threaded tube, and the inner diameter is equal to the inner diameter of the half-round tube; The diameter of the peritoneal dialysis tube is smaller than the diameter of the half-round tube, the diameter of the dacron head is greater than the diameter of the half-round tube and smaller than the diameter of the half-threaded tube; a balloon is arranged on the half-round tube, and the balloon comprises a balloon cavity, and a water delivery pipe is arranged on the side of the balloon cavity close to the half-threaded tube.

[0008] Preferably, a locking member is threadedly connected to the periphery of the positioning member, and the end of the locking member is in contact with the half-threaded tube.

[0009] Preferably, the balloon cavity comprises a multi-cavity outer wall and a planar inner wall which are fixedly connected at one end; the diameter of the multi-cavity outer wall is greater than the diameter of the planar inner wall, and a cavity for accommodating the half-round tube is formed between the multi-cavity outer wall and the planar inner wall.

[0010] Preferably, a plurality of groups of corresponding waffle holes are formed in the multi-cavity outer wall and the planar inner wall along the axial center line of the balloon; a plurality of rows of hollow holes are drilled in the half-round tube and arranged symmetrically along the axial center line of the half-round tube, and one row of the hollow holes is located on the axial center line of the half-round tube.

[0011] Preferably, the spacing of the hollow holes in the same row is consistent with the spacing of the waffle holes in the adjacent groups, the half-round tube is inserted into the balloon cavity, and the waffle holes are aligned with the hollow holes on the axial center line of the half-round tube for suture fixation.

[0012] Preferably, a first vertical partition is fixed inside the axial center line of the multi-cavity outer wall, and a second vertical partition is fixed inside the axial center line of the planar inner wall; the vertical partitions cannot block the water delivery pipe.

[0013] Preferably, the arc-shaped end surface of the balloon, the end of the balloon where the water delivery pipe is arranged, and the half-round tube are all sealed and bonded, and glue is brushed in the sutured waffle holes for sealing and bonding.

[0014] Preferably, the peritoneal dialysis tube is further provided with an adjusting knob, the adjusting knob comprises a base and a knob which is rotationally connected to the base, and the base and the knob are both provided with a catheter hole; a ring groove is formed in the outer periphery of the base, and a ring strip protrusion is arranged on the bottom of the knob and is slidably clamped in the ring groove.

[0015] Preferably, the base top is provided with symmetrical limiting grooves, a pressing rod is slidably connected in the limiting grooves, a spring is sleeved on the pressing rod, a pressing plate is fixed to one end of the pressing rod towards the catheter hole, and symmetrical and non-intersecting arc-shaped plates are arranged in the knob, so that when the knob is installed on the base, the end of the pressing rod is located between the arc-shaped plates.

[0016] In a second aspect, a use method of the auxiliary catheter for peritoneal dialysis is provided, and the specific steps include: The two half circular tubes with the installed balloon are buckled together, the positioning member and the locking member are installed in place, and the auxiliary catheter is inserted into the minimally invasive opening on the body surface; Then the peritoneal dialysis tube is sent into the body through the auxiliary catheter, so that the terylene head is located between the half threaded pipes; the water pipe is connected to the corresponding water pipe, the valve is opened to inject water into the balloon at a set pressure, so that the balloon is inflated; the flow of the peritoneal dialysis tube is adjusted by adjusting the knob; After the operation is completed, the locking member and the positioning member are removed, the water pipe valve of the water pipe is disconnected, the two half circular tubes are separated at the minimally invasive opening, and then the terylene head is sutured with the subcutaneous tissue together to complete the fixation of the peritoneal dialysis tube.

[0017] Compared with the prior art, the application has the advantages and positive effects that: The application sets the protrusions and the recesses on the two half circular tubes respectively, connects the half threaded pipes and the half circular tubes through the half concentric disc, makes the diameter of the terylene head greater than the diameter of the half circular tube and smaller than the diameter of the half threaded pipe, and under the limiting of the half concentric disc, the peritoneal dialysis tube enters the body through the auxiliary catheter, and the terylene head remains between the half threaded pipes; when the auxiliary catheter is removed, the half circular tubes are directly separated and taken out at the opening, and the terylene head is sutured with the subcutaneous tissue together; the auxiliary catheter can be successfully separated and taken out without interfering with the peritoneal dialysis tube when it is removed; and the technical problem that the first half sheath pipe interferes with the terylene head of the peritoneal dialysis tube when the first half sheath pipe and the second half sheath pipe are sequentially taken out in the prior art is solved.

[0018] The application installs the balloon on the half circular tube, the balloon includes a balloon cavity, a water pipe is arranged on the side of the balloon cavity close to the half threaded pipe, the balloon is inflated by injecting water into the balloon, the gaps between the body surface opening and the auxiliary catheter and between the auxiliary catheter and the peritoneal dialysis tube are blocked, the contact between the internal organs and the external air during the operation is avoided, so that the infection can be reduced, and the risk of air embolism can also be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the application form a part of the application and serve to further understand the application. The schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application.

[0020] Figure 1 is a schematic diagram of the auxiliary catheter without balloon of the present application embodiment 1 or 2; Figure 2 is a schematic diagram of the auxiliary catheter without balloon of the present application embodiment 1 or 2; Figure 3 is a schematic diagram of the auxiliary catheter without balloon of the present application embodiment 1 or 2; Figure 4 is a schematic diagram of the auxiliary catheter with balloon of the present application embodiment 1 or 2; Figure 5 is a schematic diagram of the semi-circular tube with balloon of the present application embodiment 1 or 2; Figure 6 is a schematic diagram of the multi-cavity outer wall of the present application embodiment 1 or 2; Figure 7 is a schematic diagram of the smooth inner wall of the present application embodiment 1 or 2; Figure 8 is a schematic diagram of the semi-circular tube with hollow hole of the present application embodiment 1 or 2; Figure 9 is a schematic diagram of the adjusting knob of the present application embodiment 1 or 2; Figure 10 is a schematic diagram of the base of the present application embodiment 1 or 2; Figure 11 is a schematic diagram of the knob of the present application embodiment 1 or 2; Figure 12 is a schematic diagram of the knob of the present application embodiment 1 or 2; in the figure: 1, peritoneal dialysis tube; 11, polyester head; 2, auxiliary catheter; 21, convex buckle semi-circular tube; 22, concave semi-circular tube; 23, semi-threaded tube; 24, positioning piece; 25, locking piece; 26, hollow hole; 3, balloon; 31, water delivery tube; 32, multi-cavity outer wall; 321, first vertical partition; 33, planar inner wall; 331, second vertical partition; 34, plum blossom hole; 4, adjusting knob; 41, base; 411, ring groove; 412, base catheter hole; 413, limiting groove; 414, pressing rod; 415, spring; 416, pressing plate; 42, knob; 421, ring strip protrusion; 422, knob cover; 423, knob catheter hole; 424, arc-shaped plate. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0022] The present application will be described in detail below with reference to the accompanying drawings.

[0023] Embodiment 1 The embodiment disclosed provides an auxiliary catheter for peritoneal dialysis, as shown in Figure 1 , Figure 2 , for placing into a peritoneal dialysis tube 1, which is provided with a dacron head 11; the auxiliary catheter 2 comprises two half-round tubes, in this embodiment, a convex buckle half-round tube 21 and a concave groove half-round tube 22, as shown in Figure 1 , Figure 2 , the arc-shaped end face of the convex buckle half-round tube 21 is uniformly provided with a plurality of protrusions in the axial direction, and the arc-shaped end face of the concave groove half-round tube 22 is uniformly provided with a plurality of grooves in the axial direction, the number, position and spacing of the protrusions and the grooves are consistent, when the convex buckle half-round tube 21 is buckled with the concave groove half-round tube 22, the protrusions on the convex buckle half-round tube 21 are buckled into the grooves of the concave groove half-round tube 22, realizing the connection of the convex buckle half-round tube 21 and the concave groove half-round tube 22, and being able to limit the axial movement of the convex buckle half-round tube 21 relative to the concave groove half-round tube 22.

[0024] In this embodiment, the auxiliary catheter 2 adopts a split half-round tube design, and the convex buckle half-round tube 21 and the concave groove half-round tube 22 adopt a mortise and tenon type cooperation (asymmetric buckling structure), which can ensure the accuracy of the cooperation.

[0025] As shown in Figure 1 , Figure 2 , the end portions of the convex buckle half-round tube 21 and the concave groove half-round tube 22 are fixedly connected with half-threaded tubes 23, when the convex buckle half-round tube 21 and the concave groove half-round tube 22 are buckled, the two half-threaded tubes 23 are also aligned to form a positioning threaded tube, and a positioning member 24 is threadedly connected on the positioning threaded tube formed by the two half-threaded tubes 23.

[0026] By fixedly connecting the half-threaded tubes 23 at one end of the half-round tube, and threadedly connecting the positioning member 24 on the half-threaded tube 23, the mutual misplacement between the convex buckle half-round tube 21 and the concave groove half-round tube 22 can be prevented, and at the same time, together with the convex buckle of the convex buckle half-round tube 21 and the grooves of the concave groove half-round tube 22, the auxiliary catheter 2 is axially limited.

[0027] In this embodiment, corresponding protrusions and grooves are also provided at the arc-shaped end face of the half-threaded tube 23.

[0028] As shown in Figure 2 , the half-threaded tube 23 is fixedly connected with the convex buckle half-round tube 21 or the concave groove half-round tube 22 through a half-concentric disc, the outer diameter of the half-concentric disc is equal to the inner diameter of the half-threaded tube 23, and the inner diameter of the half-concentric disc is equal to the inner diameter of the convex buckle half-round tube 21 or the concave groove half-round tube 22. As shown in Figure 1As shown, the diameter of the semi-threaded tube 23 is greater than the diameter of the convex-button semi-circular tube 21 or the grooved semi-circular tube 22. In this embodiment, the diameter of the peritoneal dialysis tube 1 is less than the diameter of the convex-button semi-circular tube 21 or the grooved semi-circular tube 22, and the diameter of the polyester head 11 is greater than the diameter of the convex-button semi-circular tube 21 or the grooved semi-circular tube 22, but less than the diameter of the semi-threaded tube 23.

[0029] The purpose of this design is, as Figure 3 As shown, the auxiliary catheter 2 is inserted into the minimally invasive opening on the body surface. Under the limitation of the semi-concentric disc of the semi-threaded tube 23, the semi-threaded tube 23 cannot pass through the opening. Then, the peritoneal dialysis tube 1 is inserted into the body through the auxiliary catheter 2, with the polyester head 11 remaining between the semi-threaded tubes 23. When removing the auxiliary catheter 2, the positioning element 24 is removed from the positioning threaded tube composed of the two semi-threaded tubes 23. The protruding semi-circular tube 21 and the grooved semi-circular tube 22 are separated relative to each other at the opening and then removed. The polyester head 11 between the semi-threaded tubes 23 is sutured to the subcutaneous tissue.

[0030] In this embodiment, the auxiliary catheter 2 can be successfully disassembled and removed without interfering with the peritoneal dialysis catheter 1 during removal. This solves the technical problem in the prior art where the first half-sheath slides axially relative to the second half-sheath, and interference occurs with the polyester head of the peritoneal dialysis catheter when the first half-sheath and the second half-sheath are pulled out sequentially.

[0031] like Figure 1 , Figure 2 As shown, a locking member 25 is threaded onto the periphery of the positioning member 24. When the end of the locking member 25 contacts the semi-threaded tube 23, it strengthens the connection between the positioning member 24 and the positioning threaded tube composed of the two semi-threaded tubes 23, providing precise radial preload control and preventing the positioning member 24 from loosening and dislodging, thus avoiding separation of the auxiliary catheter 2 at the opening on the body surface. In this embodiment, the protruding semi-circular tube 21 and the grooved semi-circular tube 22 can be made of medical-grade stainless steel, alloy, or polymer material.

[0032] Furthermore, since the protruding semicircular tube 21 and the grooved semicircular tube 22 are far from the end of the semi-threaded tube 23, that is, the end of the auxiliary catheter 2 inserted into the body, they are very likely to damage the internal organs if no protection is provided.

[0033] To solve this technical problem, such as Figure 4 As shown, in this embodiment, a balloon 3 is also installed on the auxiliary catheter 2. The balloon 3 wraps around the auxiliary catheter 2, which can prevent the hard end of the auxiliary catheter 2 from damaging tissues or organs when or after it is inserted into the body.

[0034] In this embodiment, as Figure 4As shown in the drawings, the convex buckle half-round pipe 21 and the concave groove half-round pipe 22 are both provided with a balloon 3, the balloon 3 is a multi-cavity forward balloon, a water delivery pipe 31 is arranged on the side of the balloon 3 close to the half-thread pipe 23, the balloon 3 is inflated by injecting water into the balloon 3, at this time, the balloon 3 can play a role of filling the gap between the body surface opening and the auxiliary catheter 2, and can also fill the gap between the auxiliary catheter 2 and the peritoneal dialysis pipe 1, so as to avoid the contact between the internal organs and the external air during the operation, thereby reducing the infection and reducing the risk of air embolism.

[0035] As shown in the drawings, Figure 5 , the balloon 3 also includes a half-round pipe-shaped balloon cavity, the balloon cavity includes a multi-cavity outer wall 32 and a planar inner wall 33, the multi-cavity outer wall 32 is fixedly connected with one end of the planar inner wall 33, the diameter of the multi-cavity outer wall 32 is greater than the diameter of the planar inner wall 33, so as to form a cavity between the multi-cavity outer wall 32 and the planar inner wall 33 for accommodating the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, and the thickness of the cavity is greater than the wall thickness of the half-round pipe. Figure 5 As shown in the drawings, the water delivery pipe 31 is arranged on the multi-cavity outer wall 32 and communicates with the cavity between the multi-cavity outer wall 32 and the planar inner wall 33, and the half-round pipe is inserted into the cavity of the balloon 3.

[0036] As shown in the drawings, Figure 5 , Figure 6 , Figure 7 As shown in the drawings, a plurality of groups of star-shaped holes 34 are arranged on the multi-cavity outer wall 32 and the planar inner wall 33 along the axial center line of the balloon 3, and the number, position and size of the star-shaped holes 34 of the multi-cavity outer wall 32 and the planar inner wall 33 are consistent. The star-shaped holes 34 are used for positioning and fixing the balloon 3 and the convex buckle half-round pipe 21 or the concave groove half-round pipe 22.

[0037] Specifically, as shown in the drawings, Figure 8 , a plurality of rows of hollow holes 26 are arranged on the pipe body of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22 of the auxiliary catheter 2; the plurality of rows of hollow holes 26 are symmetrically arranged along the axial center line of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, one row of hollow holes 26 is arranged on the axial center line of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, and the spacing of the hollow holes 26 in the same row is consistent with the spacing between adjacent groups of star-shaped holes 34. The convex buckle half-round pipe 21 or the concave groove half-round pipe 22 is inserted into the balloon 3, the star-shaped holes 34 are aligned with the hollow holes 26 on the axial center line of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, and the multi-cavity outer wall 32 and the planar inner wall 33 are sutured and fixed with the convex buckle half-round pipe 21 or the concave groove half-round pipe 22.

[0038] As shown in the drawings, Figure 6 , Figure 7As shown, the first vertical partition 321 is fixed on the inner side of the axial center line of the multi-cavity outer wall 32, and the second vertical partition 331 is fixed on the inner side of the axial center line of the planar inner wall 33. The convex buckle half-round pipe 21 or the concave groove half-round pipe 22 is inserted between the multi-cavity outer wall 32 and the planar inner wall 33, so that the first vertical partition 321 and the second vertical partition 331 clamp the axial center line of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, and the first vertical partition 321 and the second vertical partition 331 divide the interior of the balloon 3 into two symmetrical parts. The convex buckle half-round pipe 21 or the concave groove half-round pipe 22 further divides the interior of the balloon 3 into an inner part and an outer part.

[0039] As shown, Figure 8 As shown, the hollow holes 26 of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22 are clamped by the first vertical partition 321 and the second vertical partition 331 on the axial center line. When water is injected into the balloon 3, the water cannot flow from the first vertical partition 321 and the second vertical partition 331, but can flow from the hollow holes 26 on both sides of the axial center line of the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, so as to fill the balloon 3 and make it expand.

[0040] It should be noted that the first vertical partition or the second vertical partition cannot block the water delivery pipe 31.

[0041] In this embodiment, the balloon 3 can protect the tissue or organ, so that the end face hard part of the auxiliary catheter 2 will not damage the subcutaneous tissue or organ when it is inserted into the body surface opening or after it is inserted into the body surface opening. The water delivery pipe 31 of the balloon 3 is connected to the corresponding water pipe, the valve is opened according to the set pressure, water is injected into the balloon 3, the balloon is expanded, all gaps between the auxiliary catheter 2 and the body surface opening are filled, and the gap between the auxiliary catheter 2 and the peritoneal dialysis tube 1 is also filled, so that the internal organs of the body are prevented from contacting the external air during the operation, thereby reducing the risk of infection and reducing the risk of air entering the body to form an air embolus.

[0042] In this embodiment, the half-round pipe is hollowed and perforated, which is convenient for suturing and fixing the multi-cavity compliant balloon on the half-round pipe, and is also convenient for water to enter the balloon on the inner surface side of the half-round pipe from the balloon on the outer surface side of the half-round pipe when water is injected.

[0043] It should be noted that the balloon 3 and the arc-shaped end face of the half-round pipe, the end part of the balloon 3 provided with the water delivery pipe 31 and the half-round pipe are sealed and bonded, and glue is brushed in the plum blossom hole 34 after suturing to seal and bond, so as to prevent water from leaking when water is injected.

[0044] It should be noted that since the balloon 3 is respectively installed on the convex buckle half-round pipe 21 or the concave groove half-round pipe 22, the balloon 3 will not interfere with the separation of the convex buckle half-round pipe 21 and the concave groove half-round pipe 22, and the dismounting process is still as shown in Figure 3As shown, the convex buckle half pipe 21 and the concave groove half pipe 22 can be separated by removing the locking member 25 and the positioning member 24; only before the convex buckle half pipe 21 and the concave groove half pipe 22 are separated, the pressurization of the water delivery pipe 31 is disconnected.

[0045] Further, the adjusting knob 4 capable of adjusting the flow of the peritoneal dialysis tube 1 is also provided, as shown in Figure 10 As shown, the adjusting knob 4 is located on the side of the positioning member 24 away from the auxiliary catheter 2.

[0046] Specifically, in the embodiment, as shown in Figures 9 to 12 The adjusting knob 4 includes a cylindrical base 41 and a knob 42 rotatably connected to the base 41, as shown in Figure 10 、 Figure 11 The knob 42 is hollow inside and has an open bottom, and the inner diameter of the knob 42 is equal to the outer diameter of the base 41. An annular groove 411 is formed on the outer periphery of the base 41, and an annular rib 421 is provided on the bottom of the knob 42, which is slidingly clamped in the annular groove 411, so that the knob 42 can rotate relative to the base 41.

[0047] As shown in Figure 10 、 Figure 11 The base 41 is hollow inside and has an upper and lower opening forming a base catheter hole 412. The top of the knob 42 is fixed with a knob cover 422, and the knob cover 422 also has a knob catheter hole 423. The base catheter hole 412 and the knob catheter hole 423 are coaxially arranged for passing through the peritoneal dialysis tube 1.

[0048] As shown in Figure 10 The top of the base 41 is provided with symmetrical limiting grooves 413, and a pressing rod 414 is slidingly connected in the limiting grooves. A spring 415 is sleeved on the pressing rod 414, and one end of the pressing rod 414 towards the base catheter hole 412 is fixed with a pressing plate 416. When the end of the pressing rod 414 without the pressing plate 416 is pushed, the pressing plate 416 will extrude the peritoneal dialysis tube 1, so as to control the flow of the peritoneal dialysis tube 1.

[0049] As shown in Figure 11 The knob cover 422 is provided with symmetrical arc-shaped plates 424 inside the knob 42, and the two arc-shaped plates 424 do not intersect. When the knob 42 is installed on the base 41, the end of the pressing rod 414 is located between the arc-shaped plates 424. When the knob 42 is rotated, the arc-shaped plates 424 gradually push the pressing rod 414, and the pressing rod 414 drives the pressing plate 416 to adjust the flow of the peritoneal dialysis tube 1 passing through.

[0050] In the embodiment, the spring 415 sleeved on the pressure rod 414 is used to provide pre-tightening force (to increase friction to keep the gear from moving easily) and reset elastic force (to facilitate the ejection of the pressure rod 414 in the direction away from the center of the circle during rotation, thereby increasing the flow). The adjusting knob 4 can slide on the peritoneal dialysis tube 1, and the adjusting knob 4 can be used to adjust the flow when the peritoneal dialysis tube 1 is inserted into the body through the auxiliary catheter 2, or the flow of the peritoneal dialysis tube 1 can be adjusted when the auxiliary catheter 2 is detached.

[0051] Embodiment 2 The embodiment provides a use method of an auxiliary catheter for peritoneal dialysis, and the auxiliary catheter for peritoneal dialysis disclosed in the embodiment 1 is applied. The specific steps include the following. The convex buckle semicircular tube 21 and the concave semicircular tube 22 of the installation balloon 3 are buckled together, the positioning member 24 and the locking member 25 are installed in place, the auxiliary catheter 2 is inserted into a minimally invasive opening on the body surface, and a channel is provided for the peritoneal dialysis tube 1. Then, the peritoneal dialysis tube 1 is sent into the body through the auxiliary catheter 2, and the polyester head 11 is located between the semithreaded tubes 23; the water delivery pipe 31 of the balloon 3 is connected to a corresponding water pipe, a valve is opened according to a set pressure to inject water into the balloon 3, the multi-cavity on the outside of the balloon 3 is inflated, and the gaps between the auxiliary catheter 2 and the opening on the body surface and between the auxiliary catheter 2 and the peritoneal dialysis tube 1 are filled, so that the organs in the body are prevented from contacting the air outside during the operation, thereby reducing infection and reducing the risk of air embolism. The flow of the peritoneal dialysis tube 1 is adjusted through the adjusting knob 4. After the operation is completed, the locking member 25 and the positioning member 24 are detached, the water pipe valve of the water delivery pipe 31 is disconnected, the convex buckle semicircular tube 21 and the concave semicircular tube 22 are separated at the minimally invasive opening, and then the polyester head 11 is sutured with the subcutaneous tissue, and the fixation of the peritoneal dialysis tube 1 is completed.

[0052] In the embodiment, when the auxiliary catheter 2 is detached, the auxiliary catheter 2 can be successfully detached and separated and taken out without interfering with the polyester head 11.

[0053] Although the specific embodiments of the application are described above with reference to the drawings, the description is not a limitation on the protection scope of the application, and those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the application without creative labor are still within the protection scope of the application.

Claims

1. An auxiliary catheter for peritoneal dialysis, used for inserting a peritoneal dialysis catheter, wherein a polyester tip is provided on the peritoneal dialysis catheter, characterized in that, The auxiliary conduit includes two interlocking semicircular tubes; one semicircular tube has multiple protrusions at its arc-shaped end, and the other semicircular tube has multiple corresponding grooves at its arc-shaped end. The ends of the semicircular tubes are connected to semi-threaded tubes via semi-concentric discs, and the protrusions are inserted into the grooves to connect the two semicircular tubes; positioning elements are threaded onto the two semi-threaded tubes. The outer diameter of the semi-concentric disc is equal to the inner diameter of the semi-threaded tube, and the inner diameter is equal to the inner diameter of the semi-circular tube; the diameter of the peritoneal dialysis tube is smaller than the diameter of the semi-circular tube, and the diameter of the polyester head is larger than the diameter of the semi-circular tube but smaller than the diameter of the semi-threaded tube; a balloon is installed on the semi-circular tube, the balloon including a balloon cavity, and a water delivery tube is provided on the side of the balloon cavity near the semi-threaded tube.

2. The peritoneal dialysis auxiliary catheter as described in claim 1, characterized in that, The positioning member has a locking member threadedly connected to its periphery, and the end of the locking member contacts the semi-threaded pipe.

3. The peritoneal dialysis auxiliary catheter as described in claim 1, characterized in that, The balloon cavity includes a multi-cavity outer wall and a planar inner wall fixedly connected at one end; the diameter of the multi-cavity outer wall is larger than the diameter of the planar inner wall, forming a cavity between the multi-cavity outer wall and the planar inner wall for accommodating a semi-circular tube.

4. The peritoneal dialysis auxiliary catheter as described in claim 3, characterized in that, Along the axial centerline of the balloon, multiple sets of corresponding quincunx holes are opened on the outer wall of the multi-cavity body and the inner wall of the plane; multiple rows of hollow holes are drilled on the semi-circular tube and symmetrically arranged along the axial centerline of the semi-circular tube, one of which is located on the axial centerline of the semi-circular tube.

5. The peritoneal dialysis auxiliary catheter as described in claim 4, characterized in that, The spacing between the perforated holes in the same row is consistent with the spacing between the perforated holes in the adjacent group. The semi-circular tube is inserted into the balloon cavity, and the perforated holes are aligned with the perforated holes on the axial center line of the semi-circular tube for suturing and fixation.

6. The peritoneal dialysis auxiliary catheter as described in claim 3, characterized in that, The first vertical partition is fixed inside the axial centerline of the outer wall of the multi-cavity structure, and the second vertical partition is fixed inside the axial centerline of the inner wall of the plane; the vertical partition must not block the water supply pipe.

7. The peritoneal dialysis auxiliary catheter as described in claim 4, characterized in that, The arc-shaped end face of the balloon, the end of the balloon with the water delivery tube and the semi-circular tube are all sealed and bonded together, and glue is applied to the sutured plum blossom hole for sealing and bonding.

8. The peritoneal dialysis auxiliary catheter as described in claim 1, characterized in that, The peritoneal dialysis catheter is also equipped with an adjustment knob, which includes a base and a knob rotatably connected to the base. Both the base and the knob are provided with catheter holes. An annular groove is formed on the outer periphery of the base, and an annular protrusion is provided at the bottom of the knob. The annular protrusion is slidably engaged in the annular groove.

9. The peritoneal dialysis auxiliary catheter as described in claim 8, characterized in that, The base is provided with symmetrical limiting grooves at the top, and a pressure rod is slidably connected in the limiting groove. A spring is sleeved on the pressure rod, and a pressure plate is fixed at the end of the pressure rod facing the guide hole. Symmetrical and non-intersecting arc plates are provided inside the knob. When the knob is installed on the base, the end of the pressure rod is located between the arc plates.

10. A method of using an auxiliary catheter for peritoneal dialysis as described in any one of claims 1-9, characterized in that, The specific steps are as follows: The two semi-circular tubes on which the balloon is installed are fastened together, and the positioning member and the locking member are installed in place. The auxiliary catheter is then inserted into the minimally invasive opening on the body surface. The peritoneal dialysis catheter is then inserted into the body through the auxiliary catheter, with the polyester head positioned between the semi-threaded tubes; the water inlet tube is connected to the corresponding water pipe, and the valve is opened according to the set pressure to inject water into the balloon, causing the balloon to inflate; the flow rate of the peritoneal dialysis catheter is adjusted using the adjustment knob; After the surgery is completed, the locking and positioning parts are removed, the water pipe valve of the water supply pipe is disconnected, the two semi-circular tubes are separated at the micro-invasive opening and slowly pulled out, and then the polyester head is sutured together with the subcutaneous tissue to complete the fixation of the peritoneal dialysis tube.

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