Flexible ureteroscope device

Abstract

The flexible ureteroscope device comprises a flexible ureteroscope body and a sheathing canal body used for supporting the urethra to form a passage for the flexible ureteroscope body to enter, the flexible ureteroscope body comprises a miniature camera used for imaging and a holmium laser optical fiber used for cutting stones, a guide groove and a positioning groove are formed in the outer wall of the flexible ureteroscope body, and the guide groove and the positioning groove are communicated with each other. A balloon is connected into the sheath tube body and used for being matched with the flexible lens body to expand a narrow urethra area, a cross air pipe is fixedly connected to the outer side of the sheath tube body and used for injecting air into the balloon, a bearing seat is axially connected to the outer side of the sheath tube body in a sliding mode, and an adjusting assembly is connected into the bearing seat and used for driving the sheath tube body to move automatically. The adjusting assembly comprises a pressure sensor used for detecting the pressure in the ureter. According to the technical scheme, the operation cost is reduced, the operation period is shortened, and the stability of the operation process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible ureteroscopes, and particularly to a flexible ureteroscope device. Background Art

[0002] The construction of the surgical access for flexible ureteroscopy is a key step to ensure the success of the surgery. To ensure that the flexible endoscope can smoothly enter the renal pelvis and complete subsequent operations, multiple instruments are usually required. First, a flexible ureteroscope (including a camera and a channel) is used for imaging and guiding surgical instruments such as holmium laser fibers and stone baskets. Secondly, a guide wire and a dilator play a guiding role to help smoothly enter the urethra and expand the channel. Finally, a sheath is used to support the urethra to form a passage to ensure that the flexible endoscope can smoothly enter. The usual surgical procedure is to first form a passage in the urethra through the guide wire and the dilator, and then insert the flexible endoscope into the sheath until it reaches the location of the stone. For the treatment of stones, the holmium laser lithotripsy method is usually used. Fine fragments can be naturally discharged, while larger fragments are removed through a stone basket.

[0003] However, in the case of ureteral stricture, due to the relatively large diameter of the sheath, it will encounter difficulties when passing through the stricture segment, resulting in the inability to smoothly enter. In the prior art, it is usually necessary to implant a urethral stent 1 to 2 weeks before the lithotripsy surgery to dilate the stricture segment, so as to provide a passage for the subsequent lithotripsy surgery. This means that the entire treatment process needs to be divided into two-stage surgeries, increasing the total time and cost of the surgery. Summary of the Invention

[0004] The main object of the present invention is to provide a flexible ureteroscope device, aiming to reduce the surgical cost and shorten the surgical cycle, and improve the stability of the surgical process.

[0005] To achieve the above object, a flexible ureteroscope device proposed by the present invention includes a flexible endoscope body and a sheath body for supporting the urethra to form a passage for the flexible endoscope body to enter. The flexible endoscope body includes a micro camera for imaging and a holmium laser fiber for cutting stones. A guiding groove and a positioning groove are formed on the outer wall of the flexible endoscope body. A balloon is connected inside the sheath body for cooperating with the flexible endoscope body to dilate the urethral stricture area. A cross trachea is fixedly connected to the outside of the sheath body for injecting gas into the balloon. A receiving seat is axially slidably connected to the outside of the sheath body. An adjusting assembly is connected inside the receiving seat for driving the sheath body to automatically move. The adjusting assembly includes a positioning ring, a pressure sensor, and a positioning rope. The positioning ring is slidably connected to the sheath body. Each pressure sensor is fixedly connected to the side of each cross trachea facing the positioning ring. The pressure sensor is used to detect the pressure in the ureter. The positioning rope sleeve is arranged on the positioning ring, one end of the positioning rope is fixedly connected to the outer wall of the receiving seat, and the other end of the positioning rope is connected to a clamping assembly for limiting the relative position of the positioning rope.

[0006] In a possible implementation, the positioning assembly includes: A positioning plate, the positioning plate is fixedly connected in the receiving seat, a transmission sleeve is rotatably connected in the positioning plate, the transmission sleeve abuts against the inner wall of the receiving seat, and a hook is fixedly connected to the outer wall of the transmission sleeve for fixing with the end of the positioning rope away from the outer wall of the receiving seat; A limiting cylinder, wherein the limiting cylinder is fixedly connected to the inner wall of the receiving seat, a locking cylinder is slidably connected to the limiting cylinder, a locking spring is arranged between the limiting cylinder and the locking cylinder, and the inner wall of the transmission sleeve is locked with the outer wall of the locking cylinder; A pressing column, the pressing column is fixedly connected to the upper end of the clamping tube; The driving component drives the rotation of the transmission sleeve using the feedback information from the pressure sensor.

[0007] In a possible implementation manner, a tooth block is provided on the inner wall of the transmission sleeve, and a plurality of tooth grooves are provided on the outer wall of the clamping tube, and the tooth block is used to clamp the tooth grooves.

[0008] In a possible implementation manner, a first limiting surface is formed on one end of the transmission sleeve facing the pressing post, and a second limiting surface is formed on one end of the pressing post facing the transmission sleeve.

[0009] In a possible implementation, the driving assembly includes: The dial is rotatably connected to the positioning plate, and a first gear is coaxially fixedly connected to the lower side of the dial, and the first gear is meshed with the outer wall of the transmission sleeve.

[0010] In a possible implementation, the lower side of the transmission sleeve is meshingly connected to a drive shaft, the drive shaft is rotatably connected in the receiving seat, and one end of the drive shaft facing the outside of the receiving seat is connected to the micro motor.

[0011] The technical solution of the present invention limits the relative position of the soft endoscope body by the balloon in the sheath body, so that the soft endoscope body and the sheath body can stably pass through the narrow section of the ureter. The pressure in the channel is monitored in real time and the volume of gas input into the balloon is changed to ensure the safety and stability during the operation. Even in the case of ureteral stenosis, lithotripsy can be completed in only one stage, thereby reducing the cost of surgery and shortening the operation cycle. In addition, medical staff can more accurately analyze the resistance of the sheath body during movement by adjusting the data transmitted by the pressure sensor in the component, and adjust the moving force and distance according to the resistance, thereby ensuring that the relative position of the sheath body in the ureter is stable and precise, reducing the risk of damage to the inner wall of the ureter and improving the operation accuracy. Brief Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0013] Figure 1 Structural schematic of a flexible ureteroscope device of the present invention Figure 1 ; Figure 2 Structural schematic of a flexible ureteroscope device of the present invention Figure 2 ; Figure 3 Partial sectional schematic of a flexible ureteroscope device of the present invention Figure 1 ; Figure 4 Partial sectional schematic of a flexible ureteroscope device of the present invention Figure 2 ; Figure 5 is Figure 4 An enlarged schematic of A in Figure 6 is Figure 4 An enlarged schematic of B in Figure 7 Partial exploded schematic of a flexible ureteroscope device of the present invention.

[0014] Explanation of the reference numerals in the drawings: 11. Flexible endoscope body; 12. Miniature camera; 13. Holmium laser optical fiber; 14. Guide groove; 15. Positioning groove; 16. Balloon; 17. Cross trachea; 18. Receiving seat; 19. Sheath tube body; 21. Positioning ring; 22. Pressure sensor; 23. Positioning rope; 31. Clamping plate; 32. Transmission sleeve; 321. First limiting surface; 322. Second limiting surface; 33. Hook ring; 34. Limiting cylinder; 35. Clamping cylinder; 36. Clamping spring; 37. Pressing column; 38. Tooth block; 39. Tooth groove; 41. Dial; 42. First gear; 43. Driving shaft.

[0015] The realization, functional features and advantages of the objectives of the present invention will be further described with reference to the embodiments and the drawings. Detailed Embodiments

[0016] In order to make the objectives, technical solutions and advantages of this application more clear, the following will further describe this application in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0017] The present invention provides a flexible ureteroscope device. Embodiment 1

[0018] Referring to Figures 1 to 7 , it includes a flexible endoscope body 11 and a sheath tube body 19 for supporting the urethra to form a passage for the flexible endoscope body 11 to enter. The flexible endoscope body 11 includes a micro camera 12 for imaging and a holmium laser fiber 13 for cutting stones. A guiding groove 14 and a positioning groove 15 are formed on the outer wall of the flexible endoscope body 11. A balloon 16 is connected inside the sheath tube body 19 for cooperating with the flexible endoscope body 11 to expand the urethral stricture area. A cross trachea 17 is fixedly connected to the outside of the sheath tube body 19 for injecting gas into the balloon 16. A receiving seat 18 is axially slidably connected to the outside of the sheath tube body 19, and an adjusting assembly is connected inside the receiving seat 18 for driving the sheath tube body 19 to move. The adjusting assembly includes a pressure sensor 22 for detecting the pressure inside the ureter. When the sheath tube body 19 moves to the ureteral stricture, since the outer diameter of the sheath tube body 19 is larger than that of the stricture segment, the driving flexible endoscope body 11 will protrude forward. The flexible endoscope body 11 can pass through the stricture segment and move until the guiding groove 14 is aligned with the balloon 16. Then, gas is injected into the balloon 16, and after it expands, it gradually presses and expands the stricture. When the balloon 16 expands, it expands along the gap between the inner wall of the stricture segment and the flexible endoscope body 11, and finally completes the expansion of the stricture segment. The expansion process is usually carried out under local anesthesia or general anesthesia, and the duration is generally 30 minutes to 1 hour, specifically depending on the degree and location of the stricture. During the expansion process, the pressure and speed need to be monitored in real time to ensure that the expansion pressure is controlled through the air pressure feedback of the balloon 16 to avoid urethral injury or bleeding caused by over-expansion. After the expansion is completed, the balloon 16 is slowly deflated, and the sheath tube body 19 is continuously pushed to temporarily act as a stent to support the stricture segment during its movement. After the flexible endoscope body 11 passes through and reaches the target position, the flexible endoscope body 11 extends until the positioning groove 15 is aligned with the balloon 16, and the balloon 16 is slowly inflated again to ensure the relative position of the flexible endoscope body 11 and the sheath tube body 19 is fixed, thereby improving the operation accuracy and stability. During the operation, the pressure detected outside the balloon 16 is also fed back in real time to detect the pressure value inside the channel. If the pressure value is too large, the balloon 16 can be deflated to open the channel opening and relieve the pressure of the channel, ensuring the operation safety, enabling the lithotripsy surgery to be completed with only one-stage surgery even in the case of ureteral stricture, reducing the surgical cost and shortening the surgical cycle. Medical staff can more accurately analyze the resistance when the sheath tube body 19 moves through the data transmitted by the pressure sensor 22 in the adjusting assembly, and adjust the moving force and distance according to the resistance size, so as to ensure the relative position of the sheath tube body 19 in the ureter is stable and accurate, reduce the risk of damage to the inner wall of the ureter, and improve the operation accuracy.

[0019] Reference Figures 1 to 7 , the adjustment assembly includes: A positioning ring 21, which is slidably connected to the sheath body 19; Each pressure sensor 22 is fixedly connected to one side of each cross trachea 17 facing the positioning ring 21; A positioning rope 23, which is sleeved on the positioning ring 21. One end of the positioning rope 23 is fixedly connected to the outer wall of the receiving seat 18, and the other end of the positioning rope 23 is connected with a clamping component for limiting the relative position of the positioning rope 23; The adjustment assembly is used to drive the sheath body 19 to move stably. The data transmitted by the pressure sensors 22 on the upper and lower sides are used to more accurately analyze the resistance of the sheath body 19 during movement. Then, the movement force and distance of the sheath body 19 are adjusted according to the resistance magnitude, so as to ensure the stability and accuracy of the relative position of the sheath body 19 in the ureter, make the movement of the sheath body 19 safer, reduce the risk of damage to the inner wall of the ureter, and improve the operation accuracy; In addition, through the automatic drawing function of the clamping component, during the patient's operation, after first fixing the patient's operation position, the receiving seat 18 is fixed on the operating table or guardrail on one side of the operating bed in a detachable connection manner, so as to ensure the stable position of the receiving seat 18. At this time, the relative position between the sheath body 19 and the patient's ureter is effectively fixed. Then, by using the drawing function of the clamping component and the feedback data from the pressure sensor 22, a suitable pressure threshold is set to achieve automatic control of the drawing force and distance. Compared with the traditional manual operation method, this automatic control method greatly improves the convenience and safety of the operation process. This technology enables the surgical staff to reduce the time of excessive concentration during the early stage of the operation, thereby reducing unnecessary mental consumption, reducing the psychological pressure and labor intensity of the surgical staff. At the same time, the automated feeding process can obtain pressure feedback faster than manual operation, so as to ensure that the relative position of the sheath body 19 in the ureter is more accurate, reducing the risk of ureter injury during the operation. The constancy of the automatically controlled feeding speed further optimizes the friction control and ensures the smooth advancement of the sheath body 19 in the ureter. Considering the differences in the inner diameters of the ureters of different patients, by adjusting the feeding speed and constant speed control, the safety and stability of different patients during the operation can be ensured.

[0020] Reference Figures 3 to 7 , the clamping component includes: A clamping plate 31, which is fixedly connected to the inside of the receiving seat 18. A transmission sleeve 32 is rotatably connected to the inside of the clamping plate 31. The transmission sleeve 32 abuts against the inner wall of the receiving seat 18. A hook ring 33 is fixedly connected to the outer wall of the transmission sleeve 32 for fixing with one end of the positioning rope 23 away from the outer wall of the receiving seat 18; The limiting cylinder 34 is fixedly connected to the inner wall of the receiving seat 18. A clamping cylinder 35 is slidably connected to the limiting cylinder 34. A clamping spring 36 is arranged between the limiting cylinder 34 and the clamping cylinder 35. The inner wall of the transmission sleeve 32 is clamped with the outer wall of the clamping cylinder 35; The pressing column 37 is fixedly connected to the upper end of the clamping cylinder 35; The driving assembly drives the rotation of the transmission sleeve 32 based on the feedback information of the pressure sensor 22; After the clamping assembly presses the pressing column 37, the driving assembly rotates the transmission sleeve 32, so that the hook ring 33 pulls the positioning rope 23, and then drives the sheath tube body 19 to move stably towards the urethra direction through the positioning rope 23. Then when the pressure sensor 22 detects pressure data exceeding the specified value, the pressing column 37 is immediately released. Under the release of the spring force of the clamping spring 36, the inner wall of the transmission sleeve 32 is quickly clamped with the outer wall of the clamping cylinder 35, which helps to limit the relative position of the sheath tube body 19 entering the ureter and ensure the accuracy and stability of the relative position of the sheath tube body 19; On the basis that the driving assembly automatically feeds the sheath tube body 19 towards the urethra direction through the positioning rope 23, a protective design of the mechanical structure of the pressing column 37 is added. The function of the pressing column 37 is that when the feedback data of the pressure sensor 22 is abnormal or the physical condition of the patient is abnormal, the automatic feeding of the sheath tube body 19 can be quickly stopped through this mechanical structure. The setting of the pressing column 37 further reduces the possibility of accidental touch and ensures the safety of the feeding process. During the operation, if the surgical staff needs to leave temporarily to observe the inner wall condition of the patient's ureter feedback by the micro camera 12, after releasing the pressing column 37, the automatic feeding process will automatically stop. This not only prevents non-surgical staff from misoperating, but also gives the surgical staff more time and space to evaluate the patient's condition, so as to make more accurate judgments and decisions. After stopping the feeding, the distance between the sheath tube body 19 and the inner wall of the patient's ureter is kept relatively fixed, which means that the surgical staff does not need to hold the sheath tube body 19 continuously, can save physical strength, and thus improve the operation efficiency. In addition, during the operation, the decline of the surgical staff's physical strength will not cause damage to the inner wall of the ureter, further ensuring the surgical safety of the patient. In the subsequent stone cutting operation, the surgical staff can have more sufficient physical strength to ensure the safety of the patient and the operation effect, and the whole operation process becomes more efficient, accurate and safe.

[0021] Refer to Figure 7 In the inner wall of the transmission sleeve 32, a tooth block 38 is provided, and a plurality of tooth grooves 39 are provided on the outer wall of the clamping cylinder 35. The tooth block 38 is used to clamp each tooth groove 39.

[0022] Refer to Figures 2 to 3 and Figure 7A first limiting surface 321 is formed on one end of the transmission sleeve 32 facing the pressing post 37, and a second limiting surface 322 is formed on one end of the pressing post 37 facing the transmission sleeve 32; When the pressing column 37 is subjected to pressing force toward the transmission sleeve 32, the maximum downward movement distance of the pressing column 37 is limited by the opening of the first limiting surface 321 and the second limiting surface 322, so that when the user presses the pressing column 37, the engagement between the inner wall of the transmission sleeve 32 and the outer wall of the locking tube 35 can be more clearly determined, thereby making the surgical process more stable.

[0023] Reference Figures 1 to 3 and Figure 7 , the drive components include: A dial 41 is rotatably connected to the locking plate 31, a first gear 42 is coaxially fixedly connected to the lower side of the dial 41, and the first gear 42 is meshed with the outer wall of the transmission sleeve 32; When the user inserts the sheath body 19 into the urethra along the guide wire, the movement of the sheath body 19 is a slow and steady process because the urethra is very narrow and fragile. Through the rotation of the dial 41 in the driving device, since the diameter ratio between the first gear 42 and the transmission sleeve 32 is quite different, the rotation of the first gear 42 drives the transmission sleeve 32 to rotate slowly, and then the positioning rope 23 drives the sheath body 19 to move slowly toward the urethra, so that the sheath body 19 can be more stably delivered into the ureter, avoiding ureteral damage caused by violent operation, and improving the safety of the operation. Example 2

[0024] This example improves the working mode of the driving component on the basis of Example 1; Reference Figures 1 to 7 The lower side of the transmission sleeve 32 is meshed and transmission-connected with a drive shaft 43, the drive shaft 43 is rotationally connected in the receiving seat 18, and one end of the drive shaft 43 facing the outer side of the receiving seat 18 is connected to the micro motor; The transmission sleeve 32 is directly driven to rotate by the micromotor, so that the data transmitted by the pressure sensor 22 can be transmitted to the micromotor more accurately, and then through automated and precise analysis, the delivery distance inside the sheath body 19 is limited, the sheath body 19 is automatically pushed, and ureteral damage caused by violent operation is avoided, thereby improving the safety of the operation.

[0025] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flexible ureteroscope device, comprising a flexible endoscope body (11) and a sheath body (19) for supporting the urethra to form a passage for the flexible endoscope body (11) to enter. The flexible endoscope body (11) includes a miniature camera (12) for imaging and a holmium laser fiber (13) for cutting stones, characterized in that, a guiding groove (14) and a positioning groove (15) are formed on the outer wall of the flexible endoscope body (11); a balloon (16) is connected inside the sheath body (19) for cooperating with the flexible endoscope body (11) to expand the urethral stricture area; a cross trachea (17) is fixedly connected to the outside of the sheath body (19) for inflating the balloon (16); a receiving seat (18) is axially slidably connected to the outside of the sheath body (19), and an adjusting component is connected inside the receiving seat (18) for driving the sheath body (19) to move. The adjusting component includes a positioning ring (21), a pressure sensor (22) and a positioning rope (23); the positioning ring (21) is slidably connected to the sheath body (19); each of the pressure sensors (22) is fixedly connected to one side of each cross trachea (17) facing the positioning ring (21), and the pressure sensor (22) is used for detecting the pressure inside the ureter; the positioning rope (23) is sleeved on the positioning ring (21), one end of the positioning rope (23) is fixedly connected to the outer wall of the receiving seat (18), and the other end of the positioning rope (23) is connected with a clamping component for limiting the relative position of the positioning rope (23).

2. The flexible ureteroscope device according to claim 1, wherein The clamping component includes: a clamping plate (31), the clamping plate (31) is fixedly connected inside the receiving seat (18), a transmission sleeve (32) is rotatably connected inside the clamping plate (31), the transmission sleeve (32) abuts against the inner wall of the receiving seat (18), and a hook ring (33) is fixedly connected to the outer wall of the transmission sleeve (32) for fixing the end of the positioning rope (23) far from the outer wall of the receiving seat (18); a limiting cylinder (34), the limiting cylinder (34) is fixedly connected to the inner wall of the receiving seat (18), a clamping cylinder (35) is slidably connected to the limiting cylinder (34), a clamping spring (36) is arranged between the limiting cylinder (34) and the clamping cylinder (35), and the inner wall of the transmission sleeve (32) is clamped with the outer wall of the clamping cylinder (35); a pressing column (37), the pressing column (37) is fixedly connected to the upper end of the clamping cylinder (35); a driving component, which drives the rotation of the transmission sleeve (32) according to the feedback information of the pressure sensor (22).

3. The flexible ureteroscope device according to claim 2, wherein Tooth blocks (38) are formed on the inner wall of the transmission sleeve (32), and a plurality of tooth grooves (39) are formed on the outer wall of the clamping cylinder (35), and the tooth blocks (38) are used for clamping each of the tooth grooves (39).

4. The flexible ureteroscope device according to claim 2, wherein A first limiting surface (321) is formed at one end of the transmission sleeve (32) facing the pressing column (37), and a second limiting surface (322) is formed at one end of the pressing column (37) facing the transmission sleeve (32).

5. The flexible ureteroscope device according to claim 2, wherein The driving component includes: A dial (41) is rotatably connected to the locking plate (31), a first gear (42) is coaxially fixedly connected to the lower side of the dial (41), and the first gear (42) is meshed with the outer wall of the transmission sleeve (32).

6. The flexible ureteroscope device according to claim 5, wherein The lower side of the transmission sleeve (32) is meshingly connected to a drive shaft (43), the drive shaft (43) is rotatably connected in the receiving seat (18), and one end of the drive shaft (43) facing the outside of the receiving seat (18) is connected to a micro motor.

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