Guiding expansion device for bladder and cervical ligament separation and use method of guiding expansion device

Abstract

The invention provides a guide expansion device for bladder and cervix ligament separation and a use method of the guide expansion device, and relates to the field of hysterectomy. The guide probe is arranged at one end of the flow guide tube; the expansion bag is made of an elastic material, is arranged at one end, close to the guide probe, of the catheter, is connected with the side wall of the catheter and is used for expanding the ureter tunnel; two ends of the connecting section are respectively connected with the guide probe and the flow guide tube; the expander is used for supplementing an expansion medium into the expansion bag or extracting an expansion medium from the expansion bag; the sleeve is arranged between the expansion bag and the expander, and the flow guide pipe penetrates through the interior of the sleeve to be communicated with the expander; a flow guide hole communicated with the interior of the expansion bag is formed in the side wall of the flow guide pipe, the expansion medium enters and exits the expansion bag through the flow guide hole, the diameter of the connecting section is not larger than that of the guide probe, and the diameter of the expansion bag in the contraction state is not larger than that of the connecting section. The device has the effect of facilitating separation of the bladder and cervix ligaments.

Description

Technical Field

[0001] The present application relates to the technical field of hysterectomy, and in particular to a guiding expansion device for separating vesicocervical ligaments and a method of using the same. Background Art

[0002] During radical hysterectomy for cervical cancer, the separation of the vesicocervical ligament (commonly known as the ureteral tunnel) is the difficulty and focus of the operation. Due to the complex course and anatomical position of the ureter in the vesicocervical ligament, the slightest carelessness may cause ureteral injury and massive bleeding, thus affecting the surgical effect and patient prognosis. Therefore, how to quickly and safely separate the vesicocervical ligament and reduce ureteral injury and bleeding is one of the key issues in this operation.

[0003] In the related art, a Chinese patent with application number CN201320321253.X proposes a laparoscopic ureteral tunnel guiding probe, which has a tubular needle body, one end of which is provided with a liquid injection port, and the other end of which is provided with a curved tubular needle head that passes through the needle body. The front end of the needle head is a smooth ball head structure, and the ball head structure is provided with a plurality of liquid outlets. The needle head and the ball head structure are both made of a soft elastic material. During the operation, the needle head is first inserted into the ureteral tunnel, and the medical liquid is injected into the guiding probe through the liquid injection port of the needle body. The medical liquid flows out of the liquid outlet and is injected into the gap between the ureter and the parauterine tissue (that is, the ureteral tunnel), so that the ureter and the parauterine tissue are naturally separated. With regard to the above-mentioned related technologies, in the process of separating the ureter and the parauterine tissue by the outflow of medical fluid, if the pressure of the medical fluid injection is too small, it will make the ureteral tunnel difficult to open. If the pressure of the medical fluid injection is too high, there will be a risk of damaging the patient's organs and tissues. In addition, the medical fluid fills the vicinity of the surgical site, which will cause great interference to the already complex surgical environment and cause inconvenience to the hysterectomy surgery. Summary of the invention

[0004] In order to improve the problem that separation of the vesicocervical ligament is difficult and inconvenient for hysterectomy surgery, the present application provides a guiding dilation device for separation of the vesicocervical ligament and a method of using the same.

[0005] The present application provides a guiding dilation device for separating the bladder-cervix ligament, comprising: Draft tube; A guide probe is provided at one end of the guide tube; The expansion bag is made of elastic material, is arranged at one end of the drainage tube close to the guide probe, and is connected to the side wall of the drainage tube, and is used to expand the ureteral tunnel; A connecting section, both ends of which are connected to the guide probe and the guide tube respectively; an expander, which is arranged at one end of the guide tube away from the guide probe and has an expansion medium inside, and is used to add or extract the expansion medium into the expansion bag; and A sleeve is provided between the expansion bag and the expander, and the guide tube passes through the interior of the sleeve and communicates with the expander; The side wall of the guide tube is provided with a guide hole connected to the inside of the expansion bag, and the expansion medium enters and exits the expansion bag through the guide hole. The diameter of the connecting section is not larger than the diameter of the guide probe, and the diameter of the expansion bag in the contracted state is not larger than the diameter of the connecting section.

[0006] Furthermore, the expansion medium is a liquid medium, the expander includes a syringe and a pressure gauge arranged on the syringe, the syringe includes a syringe barrel and an injection piston, the injection piston is threadedly connected to the syringe barrel, the sleeve is connected to the outlet of the syringe barrel, the guide tube is connected to the interior of the syringe barrel, and the pressure gauge is used to monitor the pressure of the expansion medium inside the syringe.

[0007] Furthermore, a threaded barrel is provided at one end of the sleeve close to the syringe, a thread is provided at the outlet of the syringe, and the sleeve is threadedly connected to the outlet of the syringe via the threaded barrel.

[0008] Furthermore, a sealing ring for sealing between the sleeve and the syringe barrel is provided at one end of the guide tube close to the syringe, and the inner diameter of the sealing ring is the same as the outer diameter of the guide tube and is coaxially arranged with the guide tube.

[0009] Furthermore, the guide holes are arranged in a plurality of groups at intervals along the length direction of the guide tube, and the plurality of guide holes in the same group are evenly distributed along the circumference of the tube.

[0010] Furthermore, the end of the guide probe away from the guide tube adopts a blunt rounded structure.

[0011] Furthermore, the diameter of the dilatation sac after expansion is in the range of 1.5-5 cm, and the length of the dilatation sac is in the range of 5-10 cm.

[0012] Furthermore, the guide probe comprises a tip and a tail, the tip has a diameter ranging from 2 to 3 mm, the tail has a diameter ranging from 3 to 6 mm, and the guide probe has a length ranging from 5 to 10 cm.

[0013] Furthermore, the length of the sleeve ranges from 20 to 60 cm.

[0014] The present application also provides a method for using a guiding dilation device for separating the vesicocervical ligament, comprising the following steps: S1. Fully expose the entrance and exit of the ureteral tunnel; S2, insert the guide probe from the entrance of the ureteral tunnel and pass it out along the exit of the ureteral tunnel, so that part of the dilation sac is exposed at the entrance and exit of the ureteral tunnel; S3, filling the expansion medium into the expansion sac through the expander, so that the expansion sac expands to a specified range; S4, extracting the expansion medium in the expansion sac through the expander to make the expansion sac enter a contracted state, and taking the expansion sac and the guide probe out of the ureteral tunnel; S5. Divide the vesicocervical ligament.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up a guide probe, an expansion sac and an expander, during extensive hysterectomy, the guide probe brings the contracted expansion sac into the ureteral tunnel, and the expansion medium is added to the expansion sac through the expander. The tension generated by the gradual expansion of the expansion sac is used to bluntly separate the ureteral tunnel, making it easier to cut off the bladder cervical ligament, reducing the difficulty and time consumption of the surgical process, reducing the occurrence of ureteral injury, and greatly improving the convenience of hysterectomy; 2. By setting the expander as a syringe and setting the expansion medium as a liquid medium, when filling the expansion bag with the expansion medium, the syringe can accurately control the injection volume, so that the expansion bag can be expanded to a specified size. The liquid medium makes the expansion bag more stable in shape and volume during expansion, thereby improving the expansion effect of the ureteral tunnel; 3. By setting a pressure gauge on the syringe, it is possible to monitor in real time whether there is leakage in the dilation bag and the catheter, and it is possible to monitor whether the pressure of the inflation medium inside the syringe is higher than the pressure range of the dilation bag, thereby ensuring the functionality of the dilation bag and the safety of the guide device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0018] Figure 2 It is a partial cross-sectional view of an embodiment of the present application.

[0019] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A.

[0020] Figure 4 yes Figure 2 A partial enlarged schematic diagram of part B in the middle Figure numerals: 1. guide tube; 11. guide hole; 2. guide probe; 3. dilation bag; 4. guide hole; 3. dilation bag; 4. connecting section; 5. expander; 51. syringe; 511. syringe barrel; 512. injection piston; 52. pressure gauge; 6. sleeve; 7. sealing gasket. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present application embodiment discloses a guiding dilation device for separating the vesicocervical ligament and a method of using the same. Figure 1-4The guiding and dilating device for separating the bladder and cervical ligaments comprises a drainage tube 1, a guiding probe 2, an expansion capsule 33, a connecting section 4, an expander 5 and a sleeve 6. The drainage tube 1 is a medical hose with a diameter not greater than 2 mm; the guiding probe 2 is arranged at one end of the drainage tube 1, and the guiding probe 2 is a wedge-shaped needle, that is, the guiding probe 2 comprises a tip and a tail end, and the tail end is fixedly connected to the drainage tube, and the tip is located at the end of the tail end away from the drainage tube 1, and the tip diameter ranges from 2 to 3 mm, and the tail end diameter ranges from 3 to 6 mm. In this embodiment, the tip diameter of the guiding probe 2 is 2 mm, and the tail end diameter is 5 mm, so that the guiding probe 2 can easily pass through the ureteral tunnel. The guiding probe 2 needs to have both the hardness that satisfies its guiding function and the toughness that can be deformed and restored when squeezed. In this embodiment, the guiding probe 2 is made of hard silicone. As an alternative embodiment, the guiding probe 2 can also be made of polytetrafluoroethylene; the expansion capsule 3 is located at the end of the drainage tube 1 close to the guiding probe 2, and is made of elastic medical The connecting section 4 is connected to the guide probe 2 and the guide tube 1 at both ends. The connecting section 4 is made of a medical hose, so that when the guide probe 2 adjusts its direction during the guiding process, the connecting section 4 can be used as a bending transition section, thereby reducing the possibility of damage to the thin guide tube 1 due to bending; the expander 5 fills or extracts the expansion medium into the expansion bag 33 through the guide tube 1, so that the expansion bag 33 shrinks or expands; the sleeve 6 The catheter 1 is sleeved between the expansion capsule 33 and the expander 5. The catheter 1 passes through the sleeve 6 and is connected to the expander 5. In order to facilitate the catheter 1 to pass through the sleeve 6, in this embodiment, the outer diameter of the sleeve 6 is set to 5 mm, the inner diameter is set to 2 mm, and the diameter of the catheter 1 is set to 1.5 mm. The small diameter of the catheter 1 can effectively reduce the possibility of backflow of the expansion medium. The catheter 1 is provided with a diversion hole 411 connected to the expansion capsule 33, and the expansion medium can enter and exit the expansion capsule 33 through the diversion hole 411. In order to facilitate the expansion capsule 33 to penetrate into or out of the ureteral tunnel, the diameter of the connecting section 4 is smaller than the diameter of the guide probe 2, and the diameter of the expansion capsule 33 in the contracted state is smaller than the diameter of the connecting section 4.

[0023] When performing bladder-cervical ligament separation, the expansion capsule 33 in the contracted state is guided into the ureteral tunnel by the guide probe 2, and then the expansion medium is added to the expansion capsule 33 by the expander 5 to expand the expansion capsule 33, thereby expanding the ureteral tunnel and creating a certain size of gap between the ureter and the cervical ligament, which is convenient for cutting the cervical ligament without damaging the ureter, thereby improving the convenience of hysterectomy. In addition, the diameter of the expansion capsule 33 in the contracted state is smaller than the diameter of the connecting section 4, and the diameter of the connecting section 4 is not larger than the diameter of the guide probe 2, which provides greater convenience for the expansion capsule 33 to enter the ureteral tunnel.

[0024] Preferably, the expansion sac 3 adopts a special strip shape. By controlling the shape and material of the expansion sac 3, after the expansion medium inside the expansion sac 3 reaches a predetermined pressure value, the expansion sac 3 has a higher hardness under the support of the expansion medium, making it difficult for the liquid medium in the expansion sac 3 to move toward the two ends of the expansion sac 3 under the compression of the vesicocervical ligament, thereby improving the effectiveness of the expansion sac 3 in expanding the ureteral tunnel, ensuring that the ureteral tunnel can expand to the desired size, and facilitating the cutting of the vesicocervical ligament.

[0025] Preferably, the expansion medium is a liquid medium. By using a liquid medium, after the expansion capsule 33 is expanded by the liquid medium, the pressure in the expansion capsule 33 can be evenly distributed, so that each area on the surface of the expansion capsule 33 can be evenly expanded, thereby providing a consistent expansion force when contacting the surrounding tissue, reducing the possibility of tissue damage caused by excessive local pressure. In this embodiment, the expansion medium is physiological saline, which is a sterile liquid that matches the osmotic pressure and ion concentration of human body fluids and has almost no irritation to human tissues. Therefore, even if the expansion capsule 33 or the catheter is ruptured or leaked, the physiological saline overflows into the body tissue and will not cause obvious physiological reactions or damage.

[0026] Preferably, the expander 5 includes a syringe 51 and a pressure gauge 52. The syringe 51 is provided with a scale. According to the scale, the staff can control the amount of expansion medium injected into the expansion bag 33 and match the expansion bag 33 with a specific shape. In this embodiment, the expansion bag 33 is strip-shaped. If the expansion bag 33 expands too much, it is easy to damage the ureter due to excessive squeezing of the ureter. If the expansion bag 33 is too small, the ureteral tunnel will expand too little, which is not convenient for cutting the cervical ligament, thereby causing inconvenience in hysterectomy. Therefore, it is necessary to strictly control the filling amount of the expansion fluid. In this embodiment, the diameter range of the expansion bag 33 after expansion is controlled within 1.5-5cm, so as to ensure that the ureteral tunnel is expanded to a more effective and safe size. The pressure gauge 52 is located at one end of the syringe 51 close to its outlet and is connected to the inside of the syringe 51. Through the pressure gauge 52, the staff can monitor in real time whether there is leakage in the expansion bag 33, the catheter, and between the catheter and the syringe 51, so that the staff can discover the leakage problem in time, reduce the possibility of the expansion medium entering the patient's body and causing inconvenience to the operation, and can monitor whether the pressure of the expansion medium inside the syringe 51 is higher than the pressure range of the expansion bag 33, thereby ensuring the functionality of the expansion bag 33 and the safety of the guide device.

[0027] After the expansion medium is squeezed into the expansion capsule 33, there is a tendency for the expansion medium in the expansion capsule 33 to flow back into the syringe 51. Therefore, the syringe 51 needs to be able to resist pressure and prevent backflow. In this embodiment, the syringe 51 includes a syringe barrel 511 and an injection piston 512. A threaded barrel is provided at one end of the opening of the syringe barrel 511, and an external thread is provided on the sliding rod of the injection piston 512, so that the injection piston 512 is threadedly connected to the syringe barrel 511. When it is necessary to fill the expansion capsule 33, the threaded barrel is held and the injection piston 512 is rotated, so that the injection piston 512 can push the expansion medium into the expansion capsule 33, and the expansion medium cannot push the injection piston 512 to move in the opposite direction, thereby limiting the backflow of the expansion medium. When it is necessary to extract the expansion medium in the expansion capsule 33, the injection piston 512 is rotated in the opposite direction to move the injection piston 512 in the opposite direction, so that the expansion medium can be drawn back into the syringe barrel 511.

[0028] Preferably, the sleeve 6 is detachably connected to the syringe 51. Specifically, a threaded barrel is fixedly provided at one end of the sleeve 6 close to the syringe 51, and an external thread is provided at the outlet of the syringe 511. The threaded barrel is threadedly connected to the external thread of the outlet of the syringe 511, thereby realizing a detachable connection between the catheter and the syringe 51, thereby facilitating replacement of expansion bags 33 of different specifications for patients of different body shapes.

[0029] Preferably, in order to seal between the sleeve 6 and the syringe 51 and allow the expansion medium in the syringe 511 to flow smoothly into the guide tube 1, a sealing ring is provided at one end of the guide tube 1 close to the syringe 51, and the inner diameter of the sealing ring is the same as the outer diameter of the guide tube 1. In this embodiment, the sealing ring and the guide tube 1 are integrally formed. The threaded barrel on the sleeve 6 is connected to the outlet thread of the syringe 511 by clamping the sealing ring between the threaded barrel at the end of the sleeve 6 and the outlet of the syringe 511, so that the sealing ring plays a sealing role, and the sealing ring can also limit the expansion medium at the outlet of the syringe 511 from entering the inlet of the guide tube 1, so that the expansion medium can flow smoothly into the guide tube 1. As an alternative embodiment, the expansion medium may also be gas, such as carbon dioxide, sterile air, etc. The expander 5 uses a compressed gas source, and the compressed gas is filled into the expansion bag 33 through the compressed gas source to expand the expansion bag 33. However, the amount of compressed gas is difficult to control, and the gas-filled expansion bag 33 is easily compressed and deformed, and the surface tension of the expansion bag 33 is small, so compared with the liquid medium, the stability and controllability are relatively poor.

[0030] In order to enable the expansion capsule 33 to expand rapidly during the operation, preferably, a plurality of guide holes 411 are provided, and a plurality of guide holes 411 are provided in a plurality of groups at equal intervals along the length direction of the catheter, and the plurality of guide holes 411 in each group are evenly distributed along the circumference of the catheter. In this embodiment, each group includes two guide holes 411. As an alternative embodiment, each group may also include three or four guide holes 411. The evenly distributed plurality of guide holes 411 can not only accelerate the expansion speed of the expansion capsule 33, but also make the expansion capsule 33 expand evenly.

[0031] Preferably, the overall length of the clamping needle is greater than the length of the ureteral tunnel, which is usually about 3 cm. The length of the guide probe 2 is controlled within the range of 5-10 cm, so as to facilitate the control of the guide probe 2 to pass through the ureteral tunnel. In addition, the length of the dilation balloon 33 also needs to be greater than the length of the ureteral tunnel, that is, the length of the dilation balloon 33 is also controlled within the range of 5-10 cm, so that the dilation balloon 33 can dilate the entire ureteral tunnel. In this embodiment, the length of the guide probe 2 is 5 cm, and the length of the dilation balloon 33 is 10 cm.

[0032] Preferably, the length of the sleeve 6 is in the range of 20-60 cm. In this embodiment, the length of the sleeve 6 is set to 60 cm, so that the expander 5 can be left outside the patient's body, and the guide probe 2 and the expansion balloon 33 can have sufficient range of motion in the patient's body, further facilitating the separation of the vesicocervical ligament and the ureter.

[0033] In order to further reduce the possibility of scratching the tissue by the guide probe 2 during its movement, preferably, the end of the guide probe 2 adopts a blunt round structure so that the guide probe 2 can reduce the sharpness of the guide probe 2 while maintaining the puncture guiding function, thereby effectively reducing the possibility of scratching the tissue.

[0034] Preferably, the length of the connecting section 4 is in the range of 0.5-1 cm, which shortens the distance that the guide probe 2 passes through the ureteral tunnel after the dilation sac 33 completely enters the ureteral tunnel. At the same time, a gap is set between the guide probe 2 and the dilation sac 33, so that the guide probe 2 can flexibly adjust the angle relative to the dilation sac 33 during the puncture process, thereby facilitating the guide probe 2 to guide the dilation sac 33.

[0035] This embodiment also discloses a method for using a guiding dilation device for separating the vesicocervical ligament, comprising the following steps: S1. Fully expose the entrance and exit of the ureteral tunnel. Specifically, use an ultrasonic scalpel to cut the fibrous connective tissue between the bladder and the uterus along the anterior wall of the uterus, expose the uterine artery and ureter, push down the bladder, and identify the entrance and exit of the ureteral tunnel. S2, clamp the tail of the guide probe 2 with a vascular clamp or a separation clamp, adjust the angle of the guide probe 2, and pull the guide probe 2 to pass through the entrance of the ureteral tunnel and pass through the exit of the ureteral tunnel until the expansion sac 33 is placed in the ureteral tunnel, so that part of the expansion sac 33 is exposed at the entrance and exit of the ureteral tunnel; S4, suck an appropriate amount of sterile saline into the syringe 51, and connect the outlet of the syringe 511 to the sleeve 6, and rotate the injection piston 512 to fill the saline in the syringe 511 into the expansion bag 33, so that the expansion bag 33 expands to 1.5-5cm. The injection amount of the saline is adjusted according to the specifications of the expansion bag 33. During the process of filling the saline, the value of the pressure gauge 52 should be observed at all times to ensure that the pressure value of the expansion liquid does not exceed the maximum pressure tolerance value of the expansion bag 33; S5, by rotating the injection piston 512 in the opposite direction, the syringe 51 extracts the expansion medium in the expansion sac 33, so that the expansion sac 33 shrinks, and the expansion sac 33 and the guide probe 2 are withdrawn from the ureteral tunnel; S6. Use ultrasonic scalpel to cut the vesicocervical ligament.

[0036] Finally, it should be noted that 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guided dilation device for separation of vesicocervical ligament, characterized in that: include: Draft tube; A guide probe is provided at one end of the guide tube; The expansion bag is made of elastic material, is arranged at one end of the drainage tube close to the guide probe, and is connected to the side wall of the drainage tube, and is used to expand the ureteral tunnel; A connecting section, both ends of which are connected to the guide probe and the guide tube respectively; an expander, disposed at one end of the guide tube away from the guide probe, for replenishing or extracting expansion medium into the expansion sac; and A sleeve is provided between the expansion bag and the expander, and the guide tube passes through the sleeve and communicates with the expander; The side wall of the guide tube is provided with a guide hole connected to the inside of the expansion bag, and the expansion medium enters and exits the expansion bag through the guide hole. The diameter of the connecting section is not larger than the diameter of the guide probe, and the diameter of the expansion bag in the contracted state is not larger than the diameter of the connecting section.

2. A guiding and dilating device for separation of vesicocervical ligament according to claim 1, characterized in that: The expansion medium is a liquid medium, the expander includes a syringe and a pressure gauge arranged on the syringe, the syringe includes a syringe barrel and an injection piston, the injection piston is threadedly connected to the syringe barrel, the sleeve is connected to the outlet of the syringe barrel, the guide tube is connected to the interior of the syringe barrel, and the pressure gauge is used to monitor the pressure of the expansion medium inside the syringe.

3. A guiding and dilating device for separation of vesicocervical ligament according to claim 2, characterized in that: A threaded barrel is arranged at one end of the sleeve close to the syringe, a thread is arranged at the outlet of the syringe, and the sleeve is threadably connected with the outlet of the syringe via the threaded barrel.

4. A guiding and dilating device for separation of vesicocervical ligament according to claim 3, characterized in that: A sealing ring for sealing between the sleeve and the syringe is arranged at one end of the guide tube close to the syringe. The inner diameter of the sealing ring is the same as the outer diameter of the guide tube and is coaxially arranged with the guide tube.

5. A guiding and dilating device for separation of vesicocervical ligament according to claim 1, characterized in that: The guide holes are arranged in a plurality of groups at intervals along the length direction of the guide tube, and the guide holes in the same group are evenly distributed along the circumference of the guide tube.

6. A guiding and dilating device for separation of vesicocervical ligament according to claim 1, characterized in that: The end of the guide probe away from the guide tube adopts a blunt round structure.

7. A guiding and dilating device for separation of vesicocervical ligament according to claim 1, characterized in that: The diameter of the dilatation sac after expansion is in the range of 1.5-5 cm, and the length of the dilatation sac is in the range of 5-10 cm.

8. A guiding and dilating device for separation of vesicocervical ligament according to claim 1, characterized in that: The guide probe comprises a tip and a tail, the tip has a diameter ranging from 2 to 3 mm, the tail has a diameter ranging from 3 to 6 mm, and the guide probe has a length ranging from 5 to 10 cm.

9. A guiding and dilating device for separation of vesicocervical ligament according to claim 1, characterized in that: The length of the sleeve ranges from 20 to 60 cm.

10. A method for using a guiding and expanding device for separating vesicocervical ligaments, according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Fully expose the entrance and exit of the ureteral tunnel; S2, insert the guide probe from the entrance of the ureteral tunnel and pass it out along the exit of the ureteral tunnel, so that part of the dilation sac is exposed at the entrance and exit of the ureteral tunnel; S3, filling the expansion medium into the expansion sac through the expander, so that the expansion sac expands to a specified range; S4, extracting the expansion medium in the expansion sac through the expander to make the expansion sac enter a contracted state, and taking the expansion sac and the guide probe out of the ureteral tunnel; S5. Divide the vesicocervical ligament.

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