A supporting tool for bladder-vaginal fistula repair surgery

Abstract

A supporting tool for bladder-vaginal fistula repair surgery, comprising a guide wire, a fistula wall mucosa destroyer, an umbrella-shaped closer, and an injection gun. The fistula wall mucosa destroyer includes a snake bone cannula, a guide wire channel is provided in the middle of the snake bone cannula, a soft sleeve is sleeved on the outer surface of the snake bone cannula, and soft burrs are evenly distributed on the outer surface of the soft sleeve; the umbrella-shaped closer includes a strip-shaped tube body, a guide wire groove is opened on the outer surface of the strip-shaped tube body, an umbrella-shaped closing member is provided at the front end of the strip-shaped tube body, and a clamping switch is arranged at the rear end of the strip-shaped tube body; the injection gun includes a gun barrel, an injection tube is provided at the front end of the gun barrel, an injection tube guide wire groove is opened on the outer surface of the injection tube, a liquid storage tank is installed at the upper end of the gun barrel, and an injection push rod is movably connected to the rear end of the gun barrel, and the front end of the injection push rod is movably connected to the inner cavity of the gun barrel. The present invention overcomes the deficiencies of the prior art, can achieve tension-free repair of defects and realize fistula occlusion. And it provides an umbrella-shaped closing member as a tissue closing clip for the healing of the wound surface at the repair site, which can significantly promote the regeneration and healing of fistula tissue.

Description

Technical Field

[0001] The present invention relates to human daily necessities, in particular to medical devices, and specifically to a supporting tool for bladder-vaginal fistula repair surgery. Background Art

[0002] Vesicovaginal fistula (VVF) is one of the most common female urogenital fistulas, which refers to an abnormal anatomical structure formed between the bladder and the vagina, resulting in the leakage of urine from the bladder into the vagina through the fistula. Most VVFs are caused by iatrogenic injuries during obstetrics and gynecology or pelvic surgeries. Since urine continuously flows out of the bladder, it has a great impact on the physical and mental health of patients and seriously affects their quality of life.

[0003] Currently, due to the poor effectiveness of non-surgical treatments for VVF such as continuous drainage and electrocoagulation, treatment mainly relies on surgical repair. Affected by factors such as the location, number, size of the fistula and the vaginal structure, the surgical repair methods are complex and diverse. Traditional surgical methods mostly complete bladder-vaginal fistula repair through the transvaginal / transabdominal approach, but the surgical field of view is small, the operation difficulty is large, and due to the hyperplasia of scar tissue around the fistula opening and poor blood supply, the difficulty of surgical repair is extremely high. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a supporting tool for bladder-vaginal fistula repair surgery, which overcomes the deficiencies of the prior art, is reasonably designed, can achieve tension-free repair of defects and realize fistula occlusion. Moreover, it provides an umbrella-shaped closure for the wound surface at the repair site, which can be used as a disposable tissue closure clip, can significantly promote the regeneration and healing of fistula tissue, and greatly reduces the impact of surgical trauma on patients and postoperative complications.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] A supporting tool for bladder-vaginal fistula repair surgery includes a guide wire, a fistula wall mucosa destroyer, an umbrella-shaped closer and an injection gun.

[0007] The fistula wall mucosa destroyer includes a snake bone cannula, a guide wire channel that runs through from front to back is arranged in the snake bone cannula, a soft sleeve is sleeved on the outer surface of the front half of the snake bone cannula, and a number of soft burrs are evenly distributed on the outer surface of the soft sleeve.

[0008] The umbrella-shaped closer includes a strip-shaped tube body, a guide wire groove is axially opened on the outer surface of the strip-shaped tube body, an umbrella-shaped closure is arranged at the front end of the strip-shaped tube body, and a clamping switch is arranged in the strip-shaped tube body, and the clamping switch is used to control the separation of the umbrella-shaped closure from the front end of the strip-shaped tube body.

[0009] The injection gun includes a barrel, a syringe tube is fixedly connected to the front end of the barrel, a guide wire groove is axially formed on the outer surface of the syringe tube, a liquid storage tank is fixedly installed on the upper side of the barrel, the outlet end of the liquid storage tank is communicated with the inner cavity of the barrel, a syringe push rod is movably connected to the rear end of the barrel, and the front end of the syringe push rod is movably connected to the inner cavity of the barrel through a piston.

[0010] Preferably, the guide wire includes a guide wire body, the guide wire body includes a metal wire extending along the length direction of the guide wire and a coating layer covering the outside of the metal wire, soft wire parts are arranged at both the front and rear ends of the guide wire body, and the soft wire parts and the coating layer are integrally formed of the same soft material; the soft wire part includes a bent section and a straight section, the straight section is located between the bent section and the guide wire body, and the straight section is coaxially connected and fixed to the guide wire body.

[0011] Preferably, the ends of the soft burrs are all provided with bent barb structures.

[0012] Preferably, the umbrella-shaped closing member includes a central rod and a plurality of outer struts, the ends of the outer struts are rotatably connected to the front end of the central rod, the outer struts are evenly arranged around the outside of the central rod, and an acute angle is formed between the outer struts and the central rod; a degradable strut is coaxially connected to the end of the outer strut away from the central rod;

[0013] The rear end of the central rod is fixedly connected to the inside of the strip-shaped tube through a connecting support rod, and the clamping end of the clamping switch corresponds to the outer surface of the rear end of the central rod.

[0014] Preferably, the degradable strut is made of a biodegradable material.

[0015] Preferably, the clamping switch includes a first clamp handle, a second clamp handle and a clamp head, the first clamp handle is fixedly connected to the rear end of the strip-shaped tube, the middle of the second clamp handle is rotatably connected to the first clamp handle through a rotating shaft, and one end of a cable is connected to the upper end of the second clamp handle;

[0016] The clamp head includes a sleeve, the sleeve is fixedly connected to the front end of the inner cavity of the strip-shaped tube, a slider is slidably connected in the sleeve, the rear end of the slider is connected to the other end of the cable, the front end of the slider is rotatably connected to a first clamp arm and a second clamp arm through a rotating shaft, a first cutting piece and a second cutting piece are respectively fixedly connected to the front ends of the first clamp arm and the second clamp arm, and the first cutting piece and the second cutting piece are respectively located on both sides of the central rod;

[0017] A movable sleeve is sleeved on the outer surface of the central rod. One end of a pull rod is rotatably connected to the front end of the movable sleeve, and the other end of the pull rod is rotatably connected to the outer support rod. One end of a pull rope is connected to the rear end of the movable sleeve, and the other end of the pull rope is fixedly connected to the slider. A conical limit block is fixedly arranged on the outer surface of the central rod. The conical limit block is located behind the movable sleeve, and the surface of the conical limit block facing the movable sleeve is a conical surface.

[0018] Preferably, a spring is connected between the first clamping arm and the second clamping arm.

[0019] Preferably, the injection tube is made of a soft material.

[0020] The present invention provides a supporting tool for bladder-vaginal fistula repair surgery, which has the following beneficial effects: it can repair the defect without tension and achieve fistula occlusion. And it provides an umbrella-shaped closing member as a disposable tissue closing clip for the healing of the wound surface at the repair site, which can significantly promote the regeneration and healing of the fistula tissue, greatly reduce the impact of the surgical trauma on the patient and the surgical postoperative complications, significantly reduce the fistula healing time, and shorten the hospital stay. For complex bladder-vaginal fistulas, multiple repair methods are adopted, which greatly reduces the surgical difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the prior art.

[0022] Figure 1 Schematic structural diagram of the guide wire in the present invention;

[0023] Figure 2 Schematic structural diagram of the fistula wall mucosa destroyer in the present invention;

[0024] Figure 3 Schematic structural diagram of the umbrella-type closing device in the present invention;

[0025] Figure 4 Partial structural schematic diagram of the umbrella-type closing device in the present invention;

[0026] Figure 5 Schematic structural diagram of the injection gun in the present invention;

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Guide wire; 11. Guide wire body; 111. Metal wire; 112. Coating layer; 12. Soft wire part; 121. Bending section; 122. Straight section;

[0029] 2. Fistula wall mucosa destroyer; 21. Snake bone cannula; 22. Soft sleeve; 23. Soft burr;

[0030] 3. Umbrella-type closure device; 31. Strip-shaped tube body; 32. Guide wire groove; 33. Umbrella-shaped closure member; 331. Central rod; 332. Outer support rod; 333. Degradable support rod; 334. Movable sleeve; 335. Pull rod; 336. Pull rope; 337. Conical limit block; 341. First pliers handle; 342. Second pliers handle; 343. Cable; 344. Sleeve; 345. Slide block; 346. First pliers arm; 347. Second pliers arm; 348. First slicer; 349. Second slicer;

[0031] 4. Syringe gun; 41. Barrel; 42. Injection tube; 43. Injection tube guide wire groove; 44. Liquid storage tank; 45. Injection push rod. Specific implementation mode

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the embodiments and the drawings.

[0033] Embodiment 1, as Figures 1-5 shown, a supporting tool for bladder-vaginal fistula repair surgery includes a guide wire 1, a fistula wall mucosa destroyer 2, an umbrella-type closure device 3 and a syringe gun 4.

[0034] The fistula wall mucosa destroyer 2 includes a snake bone cannula 21. A guide wire channel that penetrates through the front and back is provided in the snake bone cannula 21. A soft sleeve 22 is sleeved on the outer surface of the front half of the snake bone cannula 21. A number of soft burrs 23 are evenly distributed on the outer surface of the soft sleeve 22.

[0035] The umbrella-type closure device 3 includes a strip-shaped tube body 31. A guide wire groove 32 is axially formed on the outer surface of the strip-shaped tube body 31. An umbrella-shaped closure member 33 is provided at the front end of the strip-shaped tube body 31. A clamping switch is provided at the rear end of the strip-shaped tube body 31. The clamping switch is used to control the separation of the umbrella-shaped closure member 33 from the front end of the strip-shaped tube body 31.

[0036] The syringe gun 4 includes a barrel 41. An injection tube 42 is fixedly connected to the front end of the barrel 41. An injection tube guide wire groove 43 is axially formed on the outer surface of the injection tube 42. A liquid storage tank 44 is fixedly installed on the upper side of the barrel 41. The outlet end of the liquid storage tank 44 is communicated with the inner cavity of the barrel 41. An injection push rod 45 is movably connected to the rear end of the barrel 41. The front end of the injection push rod 45 is movably connected to the inner cavity of the barrel 41 through a piston.

[0037] Working principle:

[0038] During use, the surgeon first uses a cystoscope to directly observe the fistula opening in the bladder, then inserts the guide wire 1 into the fistula tube through the fistula opening in the bladder until the guide wire is seen protruding from the vaginal fistula opening through the vagina. Then, most of the length of the guide wire 1 is pulled to the vaginal end, and the snake bone cannula 21 is inserted into the fistula tube along the guide wire 1 from the vagina, while ensuring that the front end of the snake bone cannula 21 does not extend beyond the fistula opening in the bladder. Then, the rear end of the snake bone cannula 21 is connected to a rotating device (such as a hollow motor), and the snake bone cannula 21 is driven to rotate by the rotating device. Subsequently, the soft burrs 23 on the outer surface of the soft sleeve 22 sleeved on the front half of the snake bone cannula 21 are used to damage the mucosa or fistula tract of the vesicovaginal fistula wall, facilitating the subsequent regrowth and repair of tissues. After that, the snake bone cannula 21 is removed from the vaginal fistula opening, the soft sleeve 22 is removed from the snake bone cannula 21 and disposed of as medical waste, and the snake bone cannula 21 can be reused after cleaning and disinfection.

[0039] After that, under direct vision with the cystoscope, using the guiding function of the guide wire groove 32 on the outer surface of the strip-shaped tube body 31, the front end of the strip-shaped tube body 31 is inserted into the vaginal fistula opening along the guide wire 1 from the vagina, and the umbrella-shaped closing member 33 at the front end of the strip-shaped tube body 31 slightly protrudes from the fistula opening in the bladder. The insertion length of the strip-shaped tube body 31 is measured to understand the actual depth of the vesicovaginal fistula. In this embodiment, the strip-shaped tube body 31 is a soft silicone tube structure, enabling the strip-shaped tube body 31 to bend along with the channel when entering the vagina. At the same time, scale lines are provided on the surface of the strip-shaped tube body 31, and the actual depth of the vesicovaginal fistula can be directly displayed through the scale lines. Then, the clamping switch is manually controlled to disconnect and separate the umbrella-shaped closing member 33 from the front end of the strip-shaped tube body 31; after that, the strip-shaped tube body 31 is removed, and the umbrella-shaped closing member 33 is left in the bladder for several weeks. In this embodiment, the umbrella-shaped closing member 33 is made of a biodegradable material such as polylactic acid material, so the umbrella-shaped closing member 33 can be absorbed and degraded by the human body after 4 weeks or discharged with urine after falling into the bladder.

[0040] Afterwards, under direct vision of the cystoscope, the front end of the injection tube 42 is inserted into the vaginal fistula along the guide wire 1 from the vagina using the guiding effect of the injection tube guide wire groove 43 on the outer surface of the injection tube 42. The insertion depth is consistent with or slightly shallower than the actual depth of the vesico-vaginal fistula learned in the above steps. In this embodiment, the injection tube 42 is made of a soft material such as silicone material, and the length of the injection tube 42 is not less than 30 cm and the diameter is about 3 mm, so that the injection tube 42 can bend with the channel when it is inserted into the vagina. Afterwards, the injection push rod 45 is used to inject the hydrogel-fat stem cell complex in the liquid storage tank 44 into the vesico-vaginal fistula, so that the fistula is completely blocked by the hydrogel-fat stem cell complex. Afterwards, the injection tube 42 is slowly removed, and the guide wire 1 is pulled out. In this embodiment, the above-mentioned hydrogel-fat stem cell complex can be obtained by existing technology. The scheme for obtaining the hydrogel-fat stem cell complex in the prior art is: extracting fat stem cells from the patient's subcutaneous fat in advance, and making the hydrogel-fat stem cell complex with the help of temperature-controlled hydrogel. The properties and adhesion of this composite material change with temperature, and it can form extremely strong adhesion and flexibility within the human body temperature range, thereby completely blocking the fistula.

[0041] By using the guide wire 1, fistula wall mucosal destroyer 2, umbrella-shaped closure device 3 and injection gun 4 in this embodiment, the defect can be repaired without tension to achieve fistula closure. The umbrella-shaped closure member 33, as a disposable tissue closure clip, can help the healing of the repaired wound surface, promote the regeneration and healing of fistula tissue, greatly reduce the impact of surgical trauma on patients and postoperative complications, and can significantly reduce the fistula healing time and shorten the hospital stay.

[0042] Embodiment 2, as a further preferred embodiment of embodiment 1, the guidewire 1 includes a guidewire body 11, the guidewire body 11 includes a metal wire 111 extending along the length direction of the guidewire and a coating layer 112 coated on the outside of the metal wire 111, in this embodiment, the metal wire 111 can be made of nickel-titanium alloy wire, and soft wire parts 12 are provided at the front and rear ends of the guidewire body 11, and the soft wire part 12 and the coating layer 112 are formed as an integral structure by the same soft material, specifically, silicone material can be used; the soft wire part 12 includes a curved section 121 and a straight section 122, the straight section 122 is located between the curved section 121 and the guidewire body 11, and the straight section 122 is coaxially connected and fixed to the guidewire body 11, wherein the bending angle of the curved section 121 is 15-30°. The softer wire parts 12 provided at the front and rear ends of the guide wire body 11 can reduce the pain of the patient when the guide wire 1 is inserted into the patient's body, and it is also convenient for the surgeon to control the advancement and rotation of the guide wire 1; the 15-30° angle of the curved section 121 is also convenient for passing through complex structures of the human body.

[0043] Example 3, as a further preferred solution of Example 1, curved barbs are provided at the ends of the soft barbs 23. When the rotating device drives the snake bone cannula 21 to rotate, the curved barb structure at the end of the soft barb 23 can more effectively damage the mucosa or fistula tract of the vaginal bladder fistula wall, which is beneficial to the subsequent regeneration and repair of tissues.

[0044] Example 4, as a further preferred solution of Example 1, as Figure 4 shown, the umbrella-shaped closing member 33 includes a central rod 331 and a plurality of outer struts 332. One end of the outer strut 332 is connected to the front end of the central rod 331. The outer struts 332 are uniformly arranged around the outside of the central rod 331, and an acute angle is formed between the outer strut 332 and the central rod 331. A biodegradable strut 333 is coaxially connected to the end of the outer strut 332 away from the central rod 331. The biodegradable strut 333 is made of a biodegradable material; the rear end of the central rod 331 is fixedly connected to the inside of the strip-shaped tube 31 through a connecting strut; the clamping end of the clamping switch corresponds to the outer surface of the rear end of the central rod 331.

[0045] Among them, as Figure 3 shown, the clamping switch includes a first clamping handle 341, a second clamping handle 342 and a clamping head. The first clamping handle 341 is fixedly connected to the rear end of the strip-shaped tube 31. The middle of the second clamping handle 342 is rotatably connected to the first clamping handle 341 through a rotating shaft. One end of a cable 343 is connected to the upper end of the second clamping handle 342;

[0046] The clamping head includes a sleeve 344. The sleeve 344 is fixedly connected to the front end of the inner cavity of the strip-shaped tube 31. A slider 345 is slidably connected inside the sleeve 344. The rear end of the slider 345 is connected to the other end of the cable 343. The front end of the slider 345 is rotatably connected to a first clamping arm 346 and a second clamping arm 347 through a rotating shaft. The first clamping arm 346 and the second clamping arm 347 both extend outside the sleeve 344. A first cutting piece 348 and a second cutting piece 349 are respectively fixedly connected to the front ends of the first clamping arm 346 and the second clamping arm 347. The first cutting piece 348 and the second cutting piece 349 are respectively located on both sides of the central rod 331;

[0047] An activity sleeve 334 is movably sleeved on the outer surface of the central rod 331. One end of a pull rod 335 is rotatably connected to the front end of the activity sleeve 334. The other end of the pull rod 335 is rotatably connected to the outer strut 332. One end of a pull rope 336 is connected to the rear end of the activity sleeve 334. The other end of the pull rope 336 is fixedly connected to the slider 345. A conical limit block 337 is fixedly arranged on the outer surface of the central rod 331. The conical limit block 337 is located behind the activity sleeve 334. The surface of the conical limit block 337 facing the activity sleeve 334 is a conical surface. Specifically, the conical limit block 337 is a frustum-shaped structure with a gradually increasing diameter from front to back, and the activity sleeve 334 is a silicone soft sleeve, and the activity sleeve 334 has a certain amount of deformation.

[0048] In the initial state, the movable sleeve 334 on the outer surface of the central rod 331 is located at the front end of the conical limit block 337, and the outer support rod 332 is in an open state under the support of the pull rod 335.

[0049] After that, during use, the front end of the strip-shaped tube body 31 is inserted into the vaginal fistula along the guide wire 1 and the entire umbrella-shaped closure member 33 slightly protrudes from the bladder fistula. At this time, since the outer support rod 332 is in an open state, the end face of the degradable support rod 333 at the end of the outer support rod 332 abuts against the wall of the bladder fistula. At this time, since the bladder is in a non-filled state and the tension of the bladder fistula wall is small, during the subsequent operation of clamping the fistula, it is ensured that the end face of the degradable support rod 333 can directly pull the bladder fistula wall for clamping. In addition, in this embodiment, the end of the degradable support rod 333 can also be set into a barbed structure, so that the end face of the degradable support rod 333 can be embedded in the fistula wall, so that the end face of the degradable support rod 333 is stably fixed to the bladder fistula wall.

[0050] After that, manually control one end of the second pliers handle 342 to merge with the first pliers handle 341, and then, through the lever principle, drive the other end of the second pliers handle 342 to pull the cable 343, and then drive the slider 345 in the sleeve 344 to move through the cable 343, and then drive the first pliers arm 346 and the second pliers arm 347 at the front end of the slider 345 to move into the inner cavity of the sleeve 344, so that the first pliers arm 346 and the second pliers arm 347 approach each other under the limiting action of the sleeve 344; at the same time, the slider 345 pulls the movable sleeve 334 to slide axially backward along the central rod 331 through the pull rope 336. Since the movable sleeve 334 is a silicone soft sleeve, the movable sleeve 334 has a certain elastic deformation amount of outward expansion, so that the movable sleeve 334 slides along the conical surface of the conical limit block 337 to the rear end of the conical limit block 337. At the same time, the pull rod 335 is pulled by the movable sleeve 334 to move, and the outer support rod 332 and the degradable support rod 333 are driven by the pull rod 335 to contract toward the central rod 331, so that the effect of clamping the bladder fistula can be achieved through the contraction of the degradable support rod 333. After that, in order to maintain the contracted state of the outer support rod 332 and the degradable support rod 333, the movable sleeve 334 can be limited by the conical limit block 337 to prevent the movable sleeve 334 from sliding forward, so that the outer support rod 332 and the degradable support rod 333 are always in a contracted state and the clamping state of the bladder fistula is maintained.

[0051] The first clamping arm 346 and the second clamping arm 347 approach each other, driving the first slicing member 348 and the second slicing member 349 to approach each other. Thus, through the cooperation of the first slicing member 348 and the second slicing member 349, the central rod 331 can be cut off, disconnecting the entire umbrella-shaped closing member 33 from the strip-shaped tube body 31 to ensure that the umbrella-shaped closing member 33 can remain independently in the bladder. Since the biodegradable strut 333 is made of a bio-degradable material, after the umbrella-shaped closing member 33 stays in the bladder for a period of time, the biodegradable strut 333 is absorbed and degraded by the human body in the bladder, causing the umbrella-shaped closing member 33 to fall off from the bladder and be discharged with the urine.

[0052] In this embodiment, a spring is connected between the first clamping arm 346 and the second clamping arm 347. The spring is located outside the sleeve 344. Thus, when the second clamping handle 342 is released, due to the elastic action of the spring, the first clamping arm 346 and the second clamping arm 347 can rotate in opposite directions to move away from each other.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements 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. A tool kit for vesicovaginal fistula repair surgery, characterized in that: It comprises a guide wire (1), a fistula wall mucosal destroyer (2), an umbrella-type closing device (3) and an injection gun (4). The fistula wall mucosa destroyer (2) comprises a snake-bone cannula (21), wherein a guide wire channel is provided in the snake-bone cannula (21) and passes through the snake-bone cannula (21) from front to back, and a soft sleeve (22) is sleeved on the outer surface of the front half of the snake-bone cannula (21), and a plurality of soft burrs (23) are evenly distributed on the outer surface of the soft sleeve (22); The umbrella-type closer (3) comprises a strip-shaped tube body (31), the outer surface of the strip-shaped tube body (31) is provided with a wire guide groove (32) along the axial direction, the front end of the strip-shaped tube body (31) is provided with an umbrella-shaped closing piece (33), and a clamping switch is provided inside the strip-shaped tube body (31), and the clamping switch is used to control the separation of the umbrella-shaped closing piece (33) from the front end of the strip-shaped tube body (31); The injection gun (4) comprises a gun barrel (41), the front end of the gun barrel (41) is fixedly connected to an injection tube (42), the outer surface of the injection tube (42) is provided with an injection tube guide groove (43) along the axial direction, a liquid storage tank (44) is fixedly installed on the upper side of the gun barrel (41), the outlet end of the liquid storage tank (44) is connected to the inner cavity of the gun barrel (41), and the rear end of the gun barrel (41) is movably connected to an injection push rod (45), and the front end of the injection push rod (45) is movably connected to the inner cavity of the gun barrel (41) through a piston.

2. A vesicovaginal fistula repair surgery kit according to claim 1, characterized in that: The guide wire (1) comprises a guide wire body (11), the guide wire body (11) comprising a metal wire (111) extending in the length direction of the guide wire and a coating layer (112) coating the outside of the metal wire (111), a soft wire portion (12) is provided at both the front and rear ends of the guide wire body (11), the soft wire portion (12) and the coating layer (112) are formed of the same soft material to form an integral structure; the soft wire portion (12) comprises a curved section (121) and a straight section (122), the straight section (122) is located between the curved section (121) and the guide wire body (11), and the straight section (122) is coaxially connected and fixed to the guide wire body (11).

3. The vesicovaginal fistula repair surgery kit according to claim 1, characterized in that: The ends of the soft burrs (23) are each provided with a curved barb structure.

4. The tool for vesicovaginal fistula repair surgery according to claim 1, characterized in that: The umbrella-shaped closing member (33) comprises a central rod (331) and a plurality of outer support rods (332), the ends of the outer support rods (332) being rotatably connected to the front end of the central rod (331), the outer support rods (332) being evenly arranged around the outside of the central rod (331), and the outer support rods (332) and the central rod (331) being arranged at an acute angle; one end of the outer support rod (332) away from the central rod (331) is coaxially connected to a degradable support rod (333); The rear end of the central rod (331) is fixedly connected to the strip-shaped tube body (31) via a connecting support rod, and the clamping end of the clamping switch corresponds to the outer surface of the rear end of the central rod (331).

5. The tool for vesicovaginal fistula repair surgery according to claim 4, characterized in that: The degradable support rod (333) is made of biodegradable material.

6. The vesicovaginal fistula repair surgery kit according to claim 4, characterized in that: The clamping switch comprises a first clamp handle (341), a second clamp handle (342) and a clamp head, wherein the first clamp handle (341) is fixedly connected to the rear end of the strip-shaped tube body (31), the middle of the second clamp handle (342) is rotatably connected to the first clamp handle (341) via a rotating shaft, and the upper end of the second clamp handle (342) is connected to one end of a pull cable (343); The pliers head comprises a sleeve (344), the sleeve (344) being fixedly connected to the front end of the inner cavity of the strip tube body (31), a slider (345) being slidably connected in the sleeve (344), the rear end of the slider (345) being connected to the other end of the cable (343), the front end of the slider (345) being rotatably connected to a first pliers arm (346) and a second pliers arm (347) via a rotating shaft, the front ends of the first pliers arm (346) and the second pliers arm (347) being fixedly connected to a first slice (348) and a second slice (349) respectively, the first slice (348) and the second slice (349) being respectively located on two sides of the center rod (331); The outer surface of the center rod (331) is movably sleeved with a movable sleeve (334); the front end of the movable sleeve (334) is rotatably connected to one end of a pull rod (335); the other end of the pull rod (335) is rotatably connected to an outer support rod (332); the rear end of the movable sleeve (334) is connected to one end of a pull rope (336); the other end of the pull rope (336) is fixedly connected to a slider (345); a conical limit block (337) is fixedly provided on the outer surface of the center rod (331); the conical limit block (337) is located behind the movable sleeve (334); and the surface of the conical limit block (337) facing the movable sleeve (334) is a conical surface.

7. The tool for vesicovaginal fistula repair surgery according to claim 6, characterized in that: A spring is connected between the first clamp arm (346) and the second clamp arm (347).

8. The tool for vesicovaginal fistula repair surgery according to claim 1, characterized in that: The injection tube (42) is made of soft material.

Images