Transurethral bladder calculus removal sheath

Abstract

According to the transurethral bladder calculus removal sheath, a sheath tube can be placed into the bladder through a sheath core and a guide wire, then an operation channel is established to assist an endoscope and other instruments in entering a urinary tract, the urethra can be protected when the instruments are repeatedly exchanged, and a water injection channel and a water injection connector are arranged in the side wall; water can be injected into the bladder during an operation, so that the bladder can be properly filled, powder generated by lithotripsy can be quickly cleaned, a good operation space and a clear operation view can be obtained, and the flow limiter arranged on the water injection connector can control the flow and speed of water injection. Meanwhile, the ureteroscope can be connected with a negative pressure generator through the negative pressure connector, and due to the fact that the diameter of the ureteroscope is smaller than the inner diameter of the protection channel, a space still exists in the protection channel to suck broken stones out of the protection channel, and the broken stones are flushed and sucked out of the body while the broken stones are broken in the operation.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a transurethral bladder lithotripsy sheath. Background Art

[0002] Bladder stones are common diseases of the urinary system, mostly secondary to lower urinary tract obstruction and stones in the kidneys and ureters entering the bladder. Bladder stones can usually be divided into single stones or multiple stones, and the solutions are also different. The main treatment methods are mainly divided into the following methods: transurethral endoscopic bladder stone pneumatic ballistic / laser lithotripsy, extracorporeal shock wave lithotripsy and open surgery.

[0003] Among them, open surgery is a more traumatic method of stone removal, such as suprapubic cystolithotomy, which will cause certain damage to the abdominal wall and bladder. The postoperative incision recovery takes a long time. Some patients with weak constitutions may also experience sequelae such as incision infection, vesico-urinary fistula, and hernia. Therefore, unless the stones are huge or the urethra is severely narrowed, it is generally not the first choice for the treatment of bladder stones.

[0004] Extracorporeal shock wave lithotripsy is a non-traumatic stone removal method that can improve patient comfort, but it also has certain disadvantages. First, due to the large mobility of bladder stones and the special position of the bladder in the pelvis, the effect of extracorporeal shock wave lithotripsy is not good; secondly, the stone fragments after extracorporeal lithotripsy will be discharged with urine, but during the discharge process, the stone fragments will rub against the bladder and urethral mucosa, causing capillary rupture and then causing hematuria and pain; in addition, some larger stones will be embedded in the urethra, causing dysuria or even urinary retention. Therefore, this method has a limited treatment range and is limited to single, smaller bladder stones.

[0005] Transurethral endoscopic bladder stone pneumatic ballistic / laser lithotripsy is a minimally invasive stone removal method, generally used as the first choice for the treatment of bladder stones. It mainly involves inserting a cystoscope or ureteroscope through the natural cavity urethra of the human body, using holmium laser or pneumatic ballistic lithotripsy under direct vision, and then inserting a metal cystoscope sheath through the urethra after lithotripsy. By connecting the Ellik flusher, the bladder lithotripsy is flushed out of the body through the metal cystoscope sheath. However, for some larger bladder stones, this method of removing bladder lithotripsy is less efficient, and the number of stones removed each time is limited. Repeated insertion into the urethra during the stone removal process can easily cause bleeding and urethral injury. In addition, due to the instantaneous high and low pressure in the bladder generated by the Ellik flusher, coupled with the friction of the metal cystoscope sheath inside, it is also easy to cause problems such as bladder wall perforation and heavy bleeding. Summary of the invention

[0006] The present invention provides a transurethral bladder lithotripsy sheath, and the technical problem to be solved is that a surgical access can be established during transurethral lithotripsy to assist an endoscope and other instruments in entering the urethra and bladder cavity, and the urethra and bladder can be protected when instruments are repeatedly exchanged, while maintaining a clear surgical field and efficiently removing lithotripsy.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A transurethral bladder lithotripsy sheath comprising:

[0009] A sheath tube, wherein a negative pressure joint and a water injection joint are also provided on the side wall of the sheath tube near the tail end, a protective channel is provided in the sheath tube along the axial direction and passing through both ends, and a water injection channel is also provided on the side wall, the negative pressure joint is communicated with the protective channel, one end of the water injection channel is communicated with the water injection joint, and the other end is communicated with the outside through the front end of the sheath tube, and a pressure regulating component is also provided on the negative pressure joint, and a flow limiter is also provided on the water injection joint, and a sealing plug that can close the tail end of the sheath tube is also provided at the tail end of the sheath tube, and a through hole is provided on the sealing plug;

[0010] A sheath core, which is detachably sleeved in the sheath tube, and the outer diameter of the sheath core is exactly equal to the inner diameter of the protection channel, both ends of the sheath core extend out of the sheath tube from the ends of the sheath tube, and the front end is an elliptical guide head, and the tail end is provided with a fixing piece that can be clamped with the end of the sheath tube, and the inside of the sheath core is also provided with an axial guide wire groove from one end of the fixing piece;

[0011] A guide wire, which is detachably disposed in the guide wire groove and can be used to guide the sheath tube and the sheath core to be placed in the bladder when the bladder lithotripsy sheath is difficult to place due to urethral distortion or stenosis;

[0012] The flow limiter is arranged on the water injection joint and is used to control the flow rate and speed of the water injection, thereby keeping the bladder in a slightly filled and balanced state to facilitate the lithotripsy operation, while also avoiding the situation where the bladder is overfilled and affects the surgical operation and the bladder ruptures.

[0013] Compared with the prior art, the present invention achieves at least the following beneficial effects: a transurethral bladder lithotripsy sheath in the present invention can place the sheath tube into the bladder through the sheath core and the guide wire, thereby establishing a surgical access to assist the endoscope and other instruments to enter the urethra and bladder cavity, and can protect the urethra and bladder when the instruments are repeatedly exchanged, and through the water injection channel and water injection joint arranged in the side wall, the bladder can be injected with water during surgery to fill the bladder so as to obtain a good operating space, and the flow limiter arranged on the water injection joint can control the flow rate and speed of the water injection to avoid overfilling of the bladder. It affects surgical operations and bladder rupture. At the same time, after lithotripsy with holmium laser or pneumatic ballistics, the negative pressure generator can be connected through the negative pressure connector. Since the diameter of the ureteroscope is smaller than the inner diameter of the protection channel, there is still space in the protection channel to suck out the gravel through the protection channel, so that the gravel can be flushed out of the body while the surgical lithotripsy is completed. Compared with the use of Ellik irrigator to flush out stones, it is safer and more efficient. In addition, since a large amount of powder will be generated during pneumatic ballistics or holmium laser lithotripsy, resulting in unclear surgical field, the rapid convection of water can also maintain a clear surgical field and thoroughly clean the gravel, reducing residual gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0016] Figure 2 is a cross-sectional view of another state in the first embodiment of the present invention;

[0017] Figure 3 for Figure 2 A partial enlarged view of area A in the embodiment;

[0018] Figure 4 is a structural diagram of the sheath tube in the first embodiment of the present invention;

[0019] Figure 5 1 is a structural diagram of the sheath core in the first embodiment of the present invention;

[0020] Figure 6 is a cross-sectional view of a flow restrictor in Embodiment 1 of the present invention;

[0021] Figure 7 is a structural diagram of the sheath tube in the second embodiment of the present invention;

[0022] Figure 8This is a structural diagram of an adjusting bolt in Embodiment 2 of the present invention;

[0023] Fig. 9 It is an exploded view of the sealing plug in other embodiments of the present invention.

[0024] The numbers in the figure are: 1, sheath tube; 2, sheath core; 3, guide wire; 4, current limiter; 11, negative pressure joint; 12, water injection joint; 13, protection channel; 14, water injection channel; 15, sealing plug; 16, indicator section; 17, fixed seat; 18, sliding baffle; 19, adjusting bolt; 21, guide head; 22, fixing piece; 23, guide wire groove; 41, housing; 42, movable plug; 43, spring; 111, exhaust hole; 112, sliding Groove; 113, adjustment seat; 151, through hole; 152, second buckle; 161, indicator mark; 171, boss; 181, slider; 191, ventilation groove; 192, sealing ring; 221, elastic pressing piece; 222, first buckle; 223, concave notch; 224, elastic rib; 411, tapered channel; 412, sleeve; 413, connecting rod; 421, sliding rod; 422, block; 423, liquid outlet hole. DETAILED DESCRIPTION

[0025] The present application will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0026] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0027] The inventors have made it clear that bladder lithotripsy is difficult to operate, the surgical field is not clear and some lithotripsy is easy to miss, and repeated exchange of instruments can easily cause urethral damage, and the use of an Ellik irrigator through a metal cystoscope sheath to flush and aspirate lithotripsy can easily cause bladder wall damage and perforation. After careful analysis, the inventors found that the main reason for the above problems in the existing transurethral endoscopic lithotripsy method is that there is no dedicated surgical access during the lithotripsy process, the urethra and bladder will be damaged when the instruments are repeatedly exchanged, and a large amount of powder will be generated during lithotripsy and cannot be discharged quickly, and it is impossible to flush and aspirate the lithotripsy at the same time. Based on the above analysis, the inventors proposed a transurethral bladder lithotripsy sheath.

[0028] like Figure 1-9 As shown, a transurethral bladder lithotripsy sheath in the present application includes a sheath tube 1, a sheath core 2, a guide wire 3 and a flow limiter 4.

[0029] Embodiment 1

[0030] Among them, reference Figure 1 and Figure 2 A negative pressure joint 11 and a water injection joint 12 are also provided on the side wall of the sheath tube 1 near the tail end. A protection channel 13 is provided in the sheath tube 1 along the axial direction and passing through both ends, and a water injection channel 14 is also provided on the side wall. The negative pressure joint 11 is connected with the protection channel 13, one end of the water injection channel 14 is connected with the water injection joint 12, and the other end is connected with the outside through the front end of the sheath tube 1, and a pressure regulating component is also provided on the negative pressure joint 11.

[0031] A sealing plug 15 is also provided at the rear end of the sheath tube 1 to seal the rear end of the sheath tube 1, and a through hole 151 is provided on the sealing plug 15. The sealing plug 15 can seal the rear end of the sheath tube 1 when the sheath core 2 is pulled out, and the through hole 151 provided on the sealing plug 15 can be used to pass a ureteroscope, and the inner diameter of the through hole 151 is exactly the same as the outer diameter of the ureteroscope, so that after the ureteroscope is inserted, water can be prevented from flowing out of the through hole 151.

[0032] In other embodiments, reference Fig. 9 In order to be suitable for endoscopes of different diameters, the inner diameter of the through hole 151 can be set to be larger than the diameter of the largest endoscope in common use, and an annular platform is fixedly set at the edge of the through hole at one end of the outer side of the sealing plug, a sleeve is threadedly connected to the annular platform, and a plurality of spring sheets are arranged at intervals around the circumference of the through hole at the suspended end of the annular platform. When endoscopes of different diameters are used, a rubber sleeve matching the diameter of the endoscope can be selected, which is sleeved on the endoscope tube and placed in the circle composed of elastic sheets. The conical groove arranged in the sleeve can squeeze the elastic sheet by rotating the sleeve, and then squeeze the rubber sleeve to seal the endoscope tube.

[0033] The sheath 1 can establish a surgical access during transurethral endoscopic lithotripsy to assist the endoscope and other instruments in entering the urinary cavity, and can protect the urethra and bladder when the instruments are repeatedly exchanged, and through the water injection channel 14 and the water injection joint 12 arranged in the side wall, the bladder can be injected with water during surgery to fill the bladder appropriately so as to obtain a good operating space. At the same time, after lithotripsy by holmium laser or pneumatic ballistics, a negative pressure generator can be connected through the negative pressure joint 11. Since the diameter of the ureteroscope is smaller than the inner diameter of the protection channel 13, there is still space in the protection channel 13 to suck out the gravel through the protection channel 13. Compared with using an Ellik flusher to flush out stones, it is safer and more efficient, and the gravel can also be cleaned more thoroughly to reduce the residual gravel.

[0034] In this embodiment 1, reference Figure 3 , the side wall of the negative pressure joint 11 is provided with an exhaust hole 111, the pressure regulating component is a sliding baffle 18, the sliding baffle 18 can cover part or all of the exhaust holes 111 after sliding, the sliding baffle 18 is provided with a slider 181, and the side wall of the negative pressure joint 11 is provided with a slide groove 112, and the slider 181 is slidably arranged in the slide groove 112. After sliding, the sliding baffle 18 can cover part or all of the exhaust holes 111, change the air intake size of the air inlet, and then by moving the sliding baffle 18, the adsorption force of the negative pressure adsorption can be adjusted to avoid excessive adsorption force leading to poor bladder filling and damage to the bladder.

[0035] refer to Figure 1 and Figure 4 The sheath tube 1 is provided with an indication section 16 along the axial direction from the front end, and the flexibility of the indication section 16 is greater than the flexibility of the non-indication section 16 on the sheath tube 1. The indication section 16 is made of transparent silicone material, and indication marks 161 are arranged at intervals along the axial direction on the indication section 16. The remaining sections of the sheath tube 1 are made of plastic material. A fixing seat 17 is provided at the rear end of the sheath tube 1, and the edge of the fixing seat 17 extends outward to form an annular boss 171. Among them, the indication mark 161 is a fluorescent line.

[0036] Through the transparent indicating segment 16 of the indicating mark 161, the whole surgical field can be comprehensively observed, and the position of the bladder stone can be clearly observed at all angles under the endoscope, and the distance, direction and orientation of the stone and the sheath tube 1 can be determined, which is conducive to the rapid search, capture and treatment of the stone during the operation. Especially for patients with prostatic hyperplasia, prostatitis, urethritis and cystitis, in the case of intraoperative bleeding and unclear vision, the present invention can also make a relatively comprehensive observation, quickly complete the operation, and improve the safety of the operation.

[0037] Since the urethra sizes of men and women, and adults and children are different, in order to improve applicability, the sheath 1 can be set to different sizes from 12F to 24F.

[0038] Among them, reference Figure 1-2 and Figure 5 The sheath core 2 is detachably mounted inside the sheath tube 1, and the outer diameter of the sheath core 2 is exactly equal to the inner diameter of the protection channel 13. Both ends of the sheath core 2 extend out of the sheath tube 1 from the ends of the sheath tube 1, and the front end is an elliptical guide head 21, and the tail end is provided with a fixing part 22 that can be clamped with the end of the sheath tube 1. An axial guide wire groove 23 is also opened inside the sheath core 2 by one end of the fixing part 22.

[0039] The sheath core 2 is made of plastic and can support the sheath tube 1, which is conducive to the smooth placement of the sheath tube 1 into the bladder, and the elliptical guide head 21 at the front end of the sheath core 2 can reduce the damage to the urethra. If the bladder lithotripsy sheath is difficult to place due to urethral distortion or stenosis, the guide wire 3 can be inserted into the guide wire groove 23, and the guide wire 3 can be used to guide the sheath tube 1 and the sheath core 2 into the bladder.

[0040] refer to Figure 5 The fixing member 22 includes a U-shaped elastic pressing member 221 and a first buckle 222 symmetrically arranged at one end of the elastic pressing member 221. The first buckle 222 has a concave notch 223 matching the shape of the boss 171. The elastic pressing member 221 also has an elastic rib 224 inside for increasing the elastic force of the elastic pressing member 221.

[0041] Through the U-shaped elastic pressing piece 221 and the first buckle 222 symmetrically arranged at one end of the elastic pressing piece 221, the sheath core 2 can be quickly buckled with or disassembled from the sheath tube 1, and a concave notch 223 matching the shape of the boss 171 is provided in the first buckle 222, so that the sheath core 2 can be firmly connected to the sheath tube 1 during catheterization, and the sheath core 2 can be quickly disassembled and removed after the catheterization is completed, thereby ensuring that the surgical process is fast and smooth.

[0042] A second buckle 152 is symmetrically provided at one end of the sealing plug 15, and a concave notch 223 matching the shape of the boss 171 is also opened in the second buckle 152. The sealing plug 15 can seal the tail end of the sheath tube 1 when the sheath core 2 is pulled out, and the second buckle 152 can make the sealing plug 15 firmly connected to the sheath tube 1.

[0043] Among them, reference Figure 1 The guide wire 3 is detachably disposed in the guide wire groove 23, and can be used to guide the sheath tube 1 and the sheath core 2 to be placed into the bladder when the bladder lithotripsy sheath is difficult to place due to urethral distortion or stenosis.

[0044] Among them, reference Figure 1 and Figure 6The flow limiter 4 is arranged on the water injection joint 12 to control the flow rate and speed of the water injection so as to keep the bladder in a slightly filled and balanced state to facilitate the lithotripsy operation. At the same time, it can also avoid the situation where the bladder is overfilled due to excessive water injection pressure and flow rate, which may affect the surgical operation or even cause bladder rupture.

[0045] The flow limiter 4 includes a shell 41, a movable plug 42 and a spring 43. The shell 41 is arranged on the water injection joint 12 and is connected to the water injection joint 12. A conical channel 411 is arranged inside one end of the shell 41. A sleeve 412 is arranged in the shell 41. The sleeve 412 is connected to the inner wall of the shell 41 by a connecting rod 413 arranged at intervals along the circumference of the sleeve 412. The movable plug 42 is arranged at one end of the conical channel 411 and is fixedly connected to a sliding rod 421 on the side away from the conical channel 411. The sliding rod 421 passes through the sleeve 412 and can slide axially along the sleeve 412. A stopper 422 is arranged at the other end of the sliding rod 421. The spring 43 is sleeved on the sliding rod 421 and its two ends are respectively abutted against the stopper 422 and the sleeve 412. The movable plug 42 can move toward one end of the conical channel 411 and close the conical channel 411.

[0046] When the water injection speed is too fast, the liquid will push the movable plug 42 to overcome the elastic force of the spring 43, so that the movable plug 42 moves toward one end of the tapered channel 411, thereby making the tapered channel 411 smaller or even closed, thereby reducing the water injection speed. When the water injection speed decreases, the spring 43 will cause the movable plug 42 to move toward the end away from the tapered channel 411, thereby enlarging the tapered channel 411, thereby increasing the water injection speed.

[0047] refer to Figure 6 The movable plug 42 is provided with a plurality of liquid outlet holes 423, which can ensure that when the movable plug 42 seals the conical channel 411, part of the liquid still flows out through the liquid outlet holes 423, thereby ensuring the minimum water injection amount of the flow limiter 4, thereby achieving the purpose of pressure relief and preventing the water injection from being stopped due to the sealing of the conical channel 411 when the pressure is too high.

[0048] When in use, first insert the sheath tube 1 with the sheath core 2 into the bladder neck, press the elastic pressing piece 221 to make the first buckle 222 disengage from the boss 171, and then quickly take out the sheath core 2, and then use the sealing plug 15 to seal the tail end of the sheath tube 1, and then insert the nephroscope or ureteroscope into the bladder through the through hole 151 on the sealing plug 15 from the sheath tube 1, and use the irrigation pump to connect the water injection connector 12 and the water injection channel 14 to inject water into the bladder, so that the bladder is always kept slightly full. After finding the stones, use pneumatic ballistics or holmium laser to crush the stones to take an inclined lithotomy position with the head high and the feet low, and connect the negative pressure generator to the negative pressure interface through the remaining space of the protective channel 13, and at the same time, with the cooperation of water injection, the crushed stones are sucked out of the protective channel 13.

[0049] Embodiment 2

[0050] Different from the above-mentioned embodiment 1, in this embodiment 2, reference Figure 7 and Figure 8 An adjusting seat 113 connected to the interior is arranged on the side wall of the negative pressure joint 11, and the pressure regulating component is an adjusting bolt 19, which is threadedly connected to the adjusting seat 113, and a conical ventilation groove 191 is axially arranged at the connection between the adjusting bolt 19 and the adjusting seat 113.

[0051] By rotating the adjusting bolt 19, the cross-sectional size of the vent groove 191 at the connection section between the adjusting seat 113 and the adjusting bolt 19 changes, so that the air intake of the vent groove 191 can be adjusted, and the adsorption force of the negative pressure adsorption can be adjusted to avoid excessive adsorption force leading to poor bladder filling and damage to the bladder.

[0052] A sealing ring 192 is also sleeved on the adjusting bolt 19. When the adjusting bolt 19 is fully tightened, it presses on the sealing gasket, which can completely close the vent groove 191 to avoid air leakage at the adjusting bolt 19, thereby maximizing the negative pressure adsorption force.

[0053] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the protection scope of the present invention.

Claims

1. A transurethral bladder lithotripsy sheath, characterized in that: include: A sheath tube (1), wherein a negative pressure joint (11) and a water injection joint (12) are also arranged on the side wall near the tail end of the sheath tube (1), a protective channel (13) is arranged in the sheath tube (1) along the axial direction and penetrating through both ends, and a water injection channel (14) is also arranged on the side wall, the negative pressure joint (11) is connected with the protective channel (13), one end of the water injection channel (14) is connected with the water injection joint (12), and the other end is connected with the outside through the front end of the sheath tube (1), and a pressure regulating component is also arranged on the negative pressure joint (11), and a sealing plug (15) is also arranged at the tail end of the sheath tube (1) to seal the tail end of the sheath tube (1), and a through hole (151) is arranged on the sealing plug (15); A sheath core (2), the sheath core (2) being detachably sleeved in the sheath tube (1), and the outer diameter of the sheath core (2) being exactly equal to the inner diameter of the protection channel (13), both ends of the sheath core (2) extending out of the sheath tube (1) from the ends of the sheath tube (1), and the front end being an elliptical guide head (21), and the rear end being provided with a fixing piece (22) capable of being clamped with the end of the sheath tube (1), and the interior of the sheath core (2) being provided with an axially extending guide wire groove (23) at one end of the fixing piece (22); A guide wire (3), wherein the guide wire (3) is detachably disposed in the guide wire groove (23), and can be used to guide the sheath tube (1) and the sheath core (2) to be placed in the bladder when the bladder lithotripsy sheath is difficult to place due to urethral distortion or stenosis; A flow limiter (4) is arranged on the water injection joint (12) and is used to control the flow rate and speed of water injection to prevent the bladder from being overfilled and affecting surgical operations and bladder rupture.

2. The transurethral bladder lithotripsy sheath according to claim 1, characterized in that: The flow limiter (4) comprises a housing (41), a movable plug (42) and a spring (43); the housing (41) is arranged on the water injection joint (12) and is in communication with the water injection joint (12); a conical channel (411) is arranged inside one end of the housing (41); a sleeve (412) is arranged inside the housing (41); the sleeve (412) is connected to the inner wall of the housing (41) via connecting rods (413) arranged at intervals along the circumference of the sleeve (412); the movable plug (42) is arranged at one end of the conical channel (411) The sliding rod (421) is fixedly connected to the end of the sliding rod (421) and is away from the conical channel (411). The sliding rod (421) passes through the sleeve (412) and can slide axially along the sleeve (412). The other end of the sliding rod (421) is provided with a stopper (422). The spring (43) is sleeved on the sliding rod (421) and its two ends are respectively in contact with the stopper (422) and the sleeve (412). The movable plug (42) can move toward one end of the conical channel (411) and close the conical channel (411).

3. The transurethral bladder lithotripsy sheath according to claim 2, characterized in that: The movable plug (42) is provided with a plurality of small liquid outlet holes (423).

4. The transurethral bladder lithotripsy sheath according to claim 1, characterized in that: The negative pressure joint (11) is provided with an exhaust hole (111) on the side wall, the pressure regulating component is a sliding baffle (18), and the sliding baffle (18) can cover part or all of the exhaust hole (111) after sliding, and a slider (181) is provided on the sliding baffle (18), and a sliding groove (112) is provided on the side wall of the negative pressure joint (11), and the slider (181) can be slidably arranged in the sliding groove (112).

5. The transurethral bladder lithotripsy sheath according to claim 1, characterized in that: An adjustment seat (113) communicating with the interior is arranged on the side wall of the negative pressure joint (11); the pressure regulating assembly is an adjustment bolt (19); the adjustment bolt (19) is threadedly connected to the adjustment seat (113); a conical ventilation groove (191) is axially arranged at the connection between the adjustment bolt (19) and the adjustment seat (113).

6. The transurethral bladder lithotripsy sheath according to claim 5, characterized in that: The adjusting bolt (19) is also sleeved with a sealing ring (192).

7. The transurethral bladder lithotripsy sheath according to claim 1, characterized in that: The sheath tube (1) is provided with an indication section (16) axially from the front end thereof, and the flexibility of the indication section (16) is greater than the flexibility of the non-indication section (16) on the sheath tube (1), the indication section (16) is made of transparent silicone material, and indication marks (161) are provided at intervals along the axial direction on the indication section (16).

8. The transurethral bladder lithotripsy sheath according to claim 1, characterized in that: A fixing seat (17) is arranged at the rear end of the sheath tube (1), the edge of the fixing seat (17) extends outward to form an annular boss (171), the fixing member (22) comprises a U-shaped elastic pressing member (221) and a first buckle (222) symmetrically arranged at one end of the elastic pressing member (221), and a concave notch (223) matching the shape of the boss (171) is provided in the first buckle (222).

9. The transurethral bladder lithotripsy sheath according to claim 8, characterized in that: An elastic rib (224) for increasing the elastic force of the elastic pressing piece (221) is also provided on the inner side of the elastic pressing piece (221).

10. The transurethral bladder lithotripsy sheath according to claim 8, characterized in that: A second buckle (152) is symmetrically arranged at one end of the sealing plug (15), and a concave notch (223) matching the shape of the boss (171) is also provided in the second buckle (152).

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