Ureter guiding sheath assembly capable of being conveniently and smoothly inserted into ureter

Abstract

The invention discloses a ureter guiding sheath assembly capable of being conveniently and smoothly inserted into a ureter, and belongs to the technical field of ureter guiding sheaths, and the ureter guiding sheath assembly comprises a flexible inner core, a flexible outer sheath located on the outer side of the flexible inner core, a channel located between the flexible inner core and the flexible outer sheath and used for allowing a guide wire inserted into the ureter in advance to penetrate through, a detection mechanism and a control mechanism; a groove with an outward opening is formed in one end of the flexible inner core, an elastic film is arranged at the opening of the groove, the detection mechanism is located in a closed space between the groove and the elastic film, and the detection mechanism comprises an angle detector, an adjusting rod, an adjusting part, a connecting ball and a ball seat part. The control mechanism comprises at least four air bags and air pumps which are communicated with the air bags in a one-to-one correspondence mode through pipelines, the end of the guiding sheath assembly is actively adjusted to adapt to the bending degree of the ureter, friction force between the bending position of the ureter and the ureter is reduced, the ureter inserting process is smooth, and damage to the ureter is reduced.

Description

Technical Field

[0001] This invention relates to the field of ureteral guiding sheath technology, and more specifically to a ureteral guiding sheath assembly that facilitates smooth insertion into the ureter. Background Technology

[0002] When performing ureteral surgery requiring flexible endoscopy, a ureteral guiding sheath must first be inserted into the ureter. Then, the flexible endoscope is inserted. Typically, the ureteral guiding sheath consists of an outer sheath and an inner core, also known as an obturator. The inner core is inserted into the outer sheath. During the insertion process, a guidewire is first inserted into the ureter, exhibiting a curvature consistent with the ureter. The ureteral guiding sheath, consisting of the outer sheath and inner core, is then inserted into the ureter along the guidewire. When the flexible endoscope is needed, the inner core is removed from the outer sheath, and then the flexible endoscope is inserted into the outer sheath.

[0003] In actual surgeries requiring flexible ureteroscopy, although the ureteral guiding sheath itself is flexible, the ureter has multiple bends of varying degrees. During insertion, the guiding sheath is bent by the bends in the ureter to achieve insertion. However, when passively inserted, the guiding sheath exerts greater pressure on the ureteral wall than during straight insertion, increasing friction at the bends and making the ureter more susceptible to damage. This increases the risk of ureteral infection later on. Therefore, there is an urgent need to design a ureteral guiding sheath assembly that facilitates smooth insertion into the ureter to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to actively adjust the end of the guide sheath assembly to adapt to the curvature of the ureter, reduce the friction between the guide sheath and the ureter at the bend, so as to make the insertion of the ureter smooth and reduce damage to the ureter.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a ureteral guide sheath assembly that facilitates smooth insertion into the ureter, comprising: a flexible inner core, a flexible outer sheath located outside the flexible inner core, a channel located between the flexible inner core and the flexible outer sheath for passing through a guide wire pre-inserted into the ureter, a detection mechanism, and a control mechanism;

[0006] The flexible inner core has an outward-facing groove at one end, and an elastic membrane is provided at the opening of the groove. The detection mechanism is located in the sealed space between the groove and the elastic membrane.

[0007] The detection mechanism includes an angle detector, an adjustment rod, an adjustment part, a connecting ball, and a ball seat. The adjustment part and the adjustment rod are fixedly connected to both sides of the connecting ball, and the adjustment rod, the connecting ball, and the adjustment part are distributed along a straight line. The adjustment part faces the groove side. The angle detector is fixed to the end of the adjustment rod facing the elastic film. The ball seat is disposed in the groove and is movably fitted outside the connecting ball and located on a plane perpendicular to the central axis of the flexible outer sheath.

[0008] The control mechanism includes at least four airbags and an air pump that is connected to each airbag via a pipeline. The at least four airbags are disposed in the groove and are evenly distributed on the outside of the adjustment part and abut against the adjustment part. The air pump is disposed at one end of the flexible inner core away from the groove.

[0009] The flexible inner core is provided with a guide wire groove extending along the direction of the flexible inner core, and the guide wire is confined within the guide wire groove;

[0010] The control mechanism also includes a controller, which is located at one end of the flexible inner core away from the groove. The angle detector and the air pump are electrically connected to the controller. The angle detector obtains the angle signal of the guidewire relative to the central axis of the flexible outer sheath in real time and transmits the angle signal to the controller. The controller controls the air pump to inflate or deflate the corresponding airbag, thereby changing the direction of the force acting on the adjustment part, which in turn drives the adjustment rod to deflect. This allows the guide sheath assembly to adjust its direction of travel according to the direction of the ureter to facilitate smooth ureter insertion.

[0011] As a preferred embodiment of the present invention, the ball seat includes two ball seats, which are symmetrically arranged on the groove wall and distributed on the plane of the connecting ball perpendicular to the central axis of the flexible outer sheath. The two ball seats are movably fitted onto the connecting ball to clamp the connecting ball.

[0012] According to a preferred embodiment of the present invention, the ball seat includes a seat body and a fixing rod. One end of the fixing rod is connected to the seat body, and the other end is fixed to the groove wall. The seat body is fitted onto the connecting ball and is movably connected to the connecting ball.

[0013] As a preferred embodiment of the present invention, the number of airbags is six, and the six airbags are disposed in the groove and evenly distributed on the outside of the adjustment part and abut against the adjustment part.

[0014] As a preferred embodiment of the present invention, the flexible inner core is provided with an air tube serving as a conduit for connecting the airbag and the corresponding air pump.

[0015] As a preferred embodiment of the present invention, the flexible inner core is provided with an electrical connecting wire, one end of which extends into the groove and is electrically connected to the angle detector, and the other end of the electrical connecting wire is electrically connected to the controller.

[0016] As a preferred embodiment of the present invention, a limiting plate is provided on the outer periphery of the flexible inner core near the air pump.

[0017] As a preferred embodiment of the present invention, the guide wire is made of metal.

[0018] As a preferred embodiment of the present invention, the end of the adjusting part away from the adjusting rod is a frustum structure.

[0019] In a preferred embodiment of the present invention, the angle detector is in contact with the elastic film.

[0020] The beneficial effects of this invention are reflected in:

[0021] 1. By setting an angle detector, the angular information of the guidewire's offset angle relative to the central axis of the flexible outer sheath is obtained. By setting an air pump and a corresponding airbag, the direction of the force acting on the adjustment part is changed by inflating and deflating the airbag, which in turn causes the adjustment rod to deflect. This allows the guide sheath assembly to adjust its direction of travel according to the direction of the ureter, so as to smoothly pass through the parts of the ureter with a large degree of curvature. During the insertion process, the resistance of the guide sheath assembly when passing through the curved parts is reduced by actively adjusting the direction, so that the insertion process of the ureter is smooth and damage to the ureter is reduced.

[0022] 2. By setting at least four air bladders, combined with the connecting ball and ball seat, the adjusting rod can be deflected in at least four directions to adapt to the bending tendency of the ureter.

[0023] 3. By setting a limiting plate, the flexible inner core is prevented from being inserted too much when assembling the flexible inner core and the flexible outer sheath. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the front part of the present invention;

[0025] Figure 2 This is a schematic diagram of the front view of the flexible inner core of the present invention;

[0026] Figure 3 This is a front view schematic diagram of the flexible inner core of the present invention;

[0027] Figure 4 This is a schematic diagram of the flexible outer sheath of the present invention;

[0028] Figure 5 This is a front view schematic diagram of the detection mechanism of the present invention;

[0029] Figure 6 This is a schematic diagram of the ball seat and other parts of the present invention.

[0030] In the diagram: 1. Flexible inner core; 11. Groove; 12. Elastic film; 13. Guide wire groove; 14. Limiting plate; 2. Flexible outer sheath; 3. Guide wire; 4. Detection mechanism; 41. Angle detector; 42. Adjusting rod; 43. Adjusting part; 44. Connecting ball; 45. Seat; 46. Fixing rod; 5. Airbag; 6. Air pump; 7. Air tube; 8. Electrical connection inner wire; 9. Controller. Detailed Implementation

[0031] The invention will now be described in further detail with reference to the accompanying drawings.

[0032] Combined with appendix Figure 1-6 As shown, a ureteral guide sheath assembly that facilitates smooth insertion into the ureter includes a flexible inner core 1, a groove 11, an elastic film 12, a guide wire groove 13, a limiting plate 14, a flexible outer sheath 2, a guide wire 3, a detection mechanism 4, an angle detector 41, an adjustment rod 42, an adjustment part 43, a connecting ball 44, a seat 45, a fixing rod 46, an airbag 5, an air pump 6, an air tube 7, an electrical connection inner wire 8, and a controller 9.

[0033] Combined with appendix Figure 1-6 As shown, a ureteral guiding sheath assembly for easy and smooth insertion into the ureter includes: a flexible inner core 1, a flexible outer sheath 2 located outside the flexible inner core 1, a channel between the flexible inner core 1 and the flexible outer sheath 2 for passing through a guide wire 3 pre-inserted into the ureter, a detection mechanism 4, and a control mechanism. The guide wire 3 is made of metal. Before inserting the flexible inner core 1 and the flexible outer sheath 2, the guide wire 3 is pre-inserted into the ureter. Subsequently, with the assistance of the guide wire 3, the flexible inner core 1 and the flexible outer sheath 2 are inserted. One end of the flexible inner core 1 has an outward-facing groove 11. An elastic membrane 12 is provided at the opening of the groove 11. Preferably, the groove 11 is a deep groove structure. The elastic membrane 12 is made of a flexible and elastic material. The detection mechanism is located in the sealed space between the groove 11 and the elastic membrane 12. Some air can be retained between the groove 11 and the elastic membrane 12 so that a buffer space is maintained between the detection mechanism and the ureter during insertion, so as to drive the elastic membrane 12 to deflect without affecting the deflection of the detection mechanism.

[0034] The detection mechanism 4 includes an angle detector 41, an adjusting rod 42, an adjusting part 43, a connecting ball 44, and a ball seat. The adjusting part 43 and the adjusting rod 42 are fixedly connected to both sides of the connecting ball 44, and the adjusting rod 42, the connecting ball 44, and the adjusting part 43 are distributed in a straight line. The adjusting part 43 faces the groove 11. The angle detector 41 is fixed to the end of the adjusting rod 42 facing the elastic film 12. The ball seat is disposed in the groove 11 and is movably fitted outside the connecting ball 44 and located on a plane perpendicular to the central axis of the flexible outer sheath 2. Specifically, the... The ball seat is located at the position corresponding to the longest cross-sectional perimeter of the connecting ball 44 on the plane perpendicular to the central axis of the flexible outer sheath 2. Furthermore, the adjusting rod 42 is a rotating body structure, and the diameter of its circular cross-section near the connecting ball 44 is smaller than that at other positions. Similarly, the adjusting part 43 is a rotating body structure, and the diameter of its circular cross-section at the connection point with the connecting ball 44 is smaller than that at other positions. The adjusting rod 42, the connecting ball 44, and the adjusting part 43 are coaxially arranged. The ball seat includes two ball seats, which are symmetrically arranged on the groove wall of the groove 11 and located near the connecting ball 44. On a plane perpendicular to the central axis of the flexible outer sheath 2, two ball seats are movably fitted around the connecting ball 44 to clamp it. Further, each ball seat includes a seat body 45 and a fixing rod 46. One end of the fixing rod 46 is connected to the seat body 45, and the other end is fixed to the groove wall of the groove 11. The seat body 45 is fitted around and movably connected to the connecting ball 44. Preferably, the fixing rod 46 is a cylindrical rod structure, and the two fixing rods 46 are coaxially arranged. The seat body 45 is an arc-shaped seat, and the curvature of the arc surface of the arc-shaped seat is similar to the curvature of the surface of the connecting ball 44. The two seats 45 are symmetrically arranged and located at the positions corresponding to the longest cross-sectional perimeter of the connecting ball 44 on the plane perpendicular to the central axis of the flexible outer sheath 2. By restricting the ball seat and the connecting ball 44, the restrictions on the deflection adjustment of the connecting ball 44, the adjustment part 43, and the adjustment rod 42 are reduced. The angle detector 41 is selected as a miniature electromagnetic positioning sensor, or a miniature capacitive angular displacement sensor, a light sensor, a giant magnetoresistance effect sensor, etc., to ensure that its miniaturization can meet the needs of ureter use.

[0035] The control mechanism includes at least four airbags 5 and air pumps 6 connected to each airbag 5 via pipes. The flexible inner core 1 contains air tubes 7 serving as the pipes connecting the airbags 5 to their corresponding air pumps 6. The at least four airbags 5 are disposed within the groove 11 and evenly distributed on the outside of the adjustment part 43, abutting against the adjustment part 43. Preferably, the number of airbags 5 is six, all disposed within the groove 11 and evenly distributed on the outside of the adjustment part 43, abutting against the adjustment part 43. The air pumps 6 are located at one end of the flexible inner core 1 away from the groove 11. The control mechanism also includes a controller 9, located at one end of the flexible inner core 1 away from the groove 11. The angle detector 41... Both the air pump 6 and the controller 9 are electrically connected. Specifically, the flexible inner core 1 is provided with an electrical connection inner wire 8, one end of which extends into the groove 11 and is electrically connected to the angle detector 41. The other end of the electrical connection inner wire 8 is electrically connected to the controller 9. The connecting ball 44, the adjusting part 43 and the adjusting rod 42 are all provided with holes for inserting the electrical connection inner wire 8 so that the electrical connection inner wire 8 can be electrically connected to the angle detector 41. Preferably, the end of the adjusting part 43 facing away from the adjusting rod 42 is a frustum structure. Since the end of the adjusting part 43 facing away from the adjusting rod 42 is a frustum structure, any one of the evenly distributed airbags 5 can have a stable effect when it acts on the adjusting part 43.

[0036] The flexible inner core 1 is provided with a guide wire groove 13 extending along the direction of the flexible inner core 1. The guide wire 3 is confined within the guide wire groove 13. By providing the guide wire groove 13, the guide wire 3 is confined, preventing the guide wire 3 from sliding between the flexible inner core 1 and the flexible outer sheath 2, and reducing the impact of its own sliding on the detection effect of the angle detector 41.

[0037] The angle detector 41 obtains the angle signal of the guide wire 3 relative to the central axis of the flexible outer sheath 2 in real time, and transmits the angle signal to the controller 9. The controller 9 controls the air pump 6 to inflate or deflate the corresponding airbag 5, so that the direction of the force acting on the adjustment part 43 changes, thereby driving the adjustment rod 42 to deflect, so that the guide sheath assembly can adjust the direction of travel according to the direction of the ureter to facilitate the smooth insertion of the ureter.

[0038] Specifically, based on the relevant content of human anatomy, the overall curvature of the ureter at different stages can be known in advance. Based on the known overall curvature, the ureteral curvature tendency and the selection of the insertion angle can be determined. According to the curvature of the ureter, the curvature of the balloon 5 pushing the end of the guide sheath assembly during a single inflation and deflation is determined. Preferably, the air pump 6 performs one operation to make the guide sheath assembly deflect the central axis of the flexible outer sheath 2 at an angle ranging from 5-15°, preferably 8°. Preferably, six balloons 5 correspond to six air pumps 6, and the operation logic of the six air pumps 6 is divided into levels. Preferably, it can be divided into six levels, according to the guide sheath assembly. Taking the perspective corresponding to the insertion direction as an example, specifically the plane perspective perpendicular to the central axis of the flexible outer sheath 2, for ease of understanding, under this perspective, the six airbags 5 are evenly distributed at the top, upper right, lower right, bottom, lower left, and upper left. These six directions divide the 360° angle into six 60° intervals: 0-60° between the top and upper right, 60-120° between the upper right and lower right, 120-180° between the lower right and bottom, 180-240° between the bottom and lower left, 240-300° between the lower left and upper left, and 300°-360° between the upper left and top. The first setting inflates the upper airbag 5 while the lower airbag 5 deflates; the second setting... The upper right airbag 5 is inflated while the lower left airbag 5 is deflated. In gear three, the lower right airbag 5 is inflated while the upper left airbag 5 is deflated; in gear four, the lower airbag 5 is inflated while the upper airbag 5 is deflated; in gear five, the lower left airbag 5 is inflated while the upper right airbag 5 is deflated; and in gear six, the upper left airbag 5 is inflated while the lower right airbag 5 is deflated. In gears one through six, after the airbags 5 are inflated or deflated, the deflection angle of the end of the drive guide sheath assembly relative to the central axis of the flexible outer sheath 2 is the same and ranges from 5-15°, preferably 8°, to achieve deflection drive in six directions. Since in different gears, one airbag 5 is in a bent inflated state while the other airbag 5 in the corresponding gear is fully deflated, this, combined with the remaining... In a moderately inflated state, the airbag 5 ensures process stability while simultaneously achieving deflection of the guide sheath assembly end. By using six airbags, deflection can be driven in six main directions, thus adapting to more ureteral bends. A simple directional shifting method balances complexity and ease of control, achieving active bending control while avoiding increased costs associated with complex structures and algorithms. The angle detector 41 abuts against the elastic diaphragm 12, allowing the angle detector 41 to deflect more effectively, thereby achieving deflection of the guide sheath assembly end.

[0039] Alternatively, the number of airbags 5 can also be four. The degree of curvature of the airbags 5 pushing against the end of the guide sheath assembly during a single inflation / deflation is determined based on the curvature of the ureter. Preferably, the air pump 6, in one operation, causes the guide sheath assembly to deflect at an angle ranging from 5-15° relative to the central axis of the flexible outer sheath 2; preferably, the angle is 10°. It is preferable to have four airbags 5 corresponding to four air pumps 6. The operating logic of the four air pumps 6 is divided into four levels. Preferably, it can be divided into four levels. Taking the perspective corresponding to the insertion direction of the guide sheath assembly as an example for ease of understanding, under this perspective, the airbags 5 corresponding to the four air pumps 6 are respectively... Located in four positions (up, down, left, right), the first position inflates the upper airbag 5 while the lower airbag 5 deflates; the second position inflates the lower airbag 5 while the upper airbag 5 deflates; the third position inflates the left airbag 5 while the right airbag 5 deflates; and the fourth position inflates the right airbag 5 while the left airbag 5 deflates. In all four positions, after the airbags 5 are inflated or deflated, the deflection angle of the end of the drive guide sheath assembly relative to the central axis of the flexible outer sheath 2 is the same and ranges from 5 to 15°, preferably 10°. Alternatively, the number of airbags can be eight, depending on specific requirements and cost budget.

[0040] The controller 9 includes at least operation buttons for charging and discharging air pump 6 at different gear levels, as well as a display unit for displaying the guide wire deflection angle, so as to obtain the deflection angle information and perform the corresponding operation of air pump 6 based on the information;

[0041] A limiting plate 14 is provided on the outer periphery of the flexible inner core 1 near the air pump 6. By setting the limiting plate 14, the flexible inner core 1 is prevented from being inserted too much. The installation position of the limiting plate 14 can be selected based on experience or the detection requirements of the angle detector 41.

[0042] Working principle: The guidewire 3 is pre-inserted, the flexible outer sheath 2 is fitted over the guidewire 3, and the flexible inner core 1 is inserted into the flexible outer sheath 2, ensuring the guidewire 3 is located within the guidewire groove 13. This completes the combination of the flexible inner core 1 and the flexible outer sheath 2, forming a guide sheath assembly. Preferably, six airbags 5 are used, all in a medium-inflation state. In this state, the airbags 5 abut against the adjustment part 43. Then, the flexible inner core 1 and flexible outer sheath 2 are inserted into the ureter under the protection of lubricating fluid. During insertion, the flexible inner core 1 and flexible outer sheath 2 are aligned with the main curvature of the ureter, ensuring that the extension direction of the line connecting at least two airbags 5 is consistent with the main curvature direction. Preferably, the two airbags 5 selected are the first and fourth gear corresponding airbags. After insertion, the angle detector 41 obtains the offset angle of the guidewire 3 relative to the central axis of the flexible outer sheath 2 in real time. As the flexible inner core 1 and flexible outer sheath 2 are inserted, when the guidewire 3 shifts along the main curvature direction, the angle detector 41 detects the angle of the guidewire 3 relative to the central axis of the flexible outer sheath 2. Depending on the specific direction of the guidewire 3's offset, select either the first or fourth gear to drive the end of the guide sheath assembly to deflect. When the guidewire 3 deviates at a 60° angle to the main bending direction, select the remaining gears to drive the end of the guide sheath assembly to deflect, depending on the specific direction of the guidewire 3's offset. When the guidewire 3 experiences an angular offset between the first and second gears or other non-corresponding angular offsets, select the gear based on the tendency of the offset at this time. Specifically, this can be understood as follows: the first gear can be selected within the range of 330-30°, the second gear within the range of 30-90°, the third gear within the range of 90-150°, the fourth gear within the range of 150-210°, the fifth gear within the range of 210-270°, and the sixth gear within the range of 270-330°. After insertion is completed, the gas in the six airbags 5 returns to its original state. In this state, the six airbags 5 abut against the adjustment part 43.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A ureteral guiding sheath assembly that facilitates smooth insertion into the ureter, comprising: The flexible inner core (1), the flexible outer sheath (2) located outside the flexible inner core (1), the channel between the flexible inner core (1) and the flexible outer sheath (2) for passing through the guidewire (3) pre-inserted into the ureter, the detection mechanism (4), and the control mechanism are characterized in that: The flexible inner core (1) has an outward-facing groove (11) at one end, and an elastic film (12) is provided at the opening of the groove (11). The detection mechanism is located in the sealed space between the groove (11) and the elastic film (12). The detection mechanism (4) includes an angle detector (41), an adjustment rod (42), an adjustment part (43), a connecting ball (44), and a ball seat. The adjustment part (43) and the adjustment rod (42) are fixedly connected to both sides of the connecting ball (44), and the adjustment rod (42), the connecting ball (44), and the adjustment part (43) are distributed along a straight line. The adjustment part (43) faces the groove (11). The angle detector (41) is fixed to the end of the adjustment rod (42) facing the elastic film (12). The ball seat is set in the groove (11). The ball seat is movably fitted outside the connecting ball (44) and is located on a plane perpendicular to the central axis of the flexible outer sheath (2). The control mechanism includes at least four airbags (5) and an air pump (6) that is connected to the airbags (5) one by one through a pipeline. The at least four airbags (5) are disposed in the groove (11) and are evenly distributed on the outside of the adjustment part (43) and abut against the adjustment part (43). The air pump (6) is disposed at one end of the flexible inner core (1) away from the groove (11). The flexible inner core (1) is provided with a guide wire groove (13) extending along the direction of the flexible inner core (1), and the guide wire (3) is limited to the guide wire groove (13); The control mechanism also includes a controller (9), which is located at one end of the flexible inner core (1) away from the groove (11). The angle detector (41) and the air pump (6) are electrically connected to the controller (9). The angle detector (41) obtains the angle signal of the guide wire (3) relative to the central axis of the flexible outer sheath (2) in real time and transmits the angle signal to the controller (9). The controller (9) inflates or deflates the corresponding airbag (5) by controlling the air pump (6), so that the direction of the force acting on the adjustment part (43) changes, thereby causing the adjustment rod (42) to deflect. This allows the guide sheath assembly to adjust its direction of travel according to the direction of the ureter so that the insertion of the ureter is smooth.

2. The ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: The ball seat includes two ball seats, which are symmetrically arranged on the groove wall of the groove (11) and distributed on the plane of the connecting ball (44) perpendicular to the central axis of the flexible outer sheath (2). The two ball seats are movably fitted outside the connecting ball (44) to clamp the connecting ball (44).

3. The ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 2, characterized in that: The ball seat includes a seat body (45) and a fixing rod (46). One end of the fixing rod (46) is connected to the seat body (45), and the other end is fixed to the groove wall of the groove (11). The seat body (45) is fitted around the connecting ball (44) and is movably connected to the connecting ball (44).

4. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 3, characterized in that: The number of airbags (5) is six. The six airbags (5) are disposed in the groove (11) and evenly distributed on the outside of the adjustment part (43) and abut against the adjustment part (43).

5. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: The flexible inner core (1) is provided with an air pipe (7) which serves as a conduit for connecting the airbag (5) and the corresponding air pump (6).

6. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: The flexible inner core (1) is provided with an electrical connection inner wire (8), one end of which extends into the groove (11) and is electrically connected to the angle detector (41). The other end of the electrical connection inner wire (8) is electrically connected to the controller (9).

7. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: A limiting plate (14) is provided on the outer periphery of the flexible inner core (1) near the air pump (6).

8. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: The guide wire (3) is made of metal.

9. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: The adjustment part (43) is a frustum structure at one end away from the adjustment rod (42).

10. A ureteral guiding sheath assembly for easy and smooth insertion into the ureter according to claim 1, characterized in that: The angle detector (41) abuts against the elastic film (12).

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