Adjustable visual flexible ureteroscope channel sheath

Abstract

The invention relates to the technical field of medical instruments, in particular to an adjustable and visible flexible ureteroscope channel sheath which comprises a channel sheath body, a guide mechanism, an adjusting mechanism and an elastic leather sheath, a plurality of rope penetrating holes distributed at equal angles are formed in the channel sheath body, and the rope penetrating holes penetrate through the two ends of the channel sheath body; the guiding mechanism is fixedly installed at the end of the channel sheath body. One of the push-pull buttons is shifted, so that one push-pull block corresponding to the push-pull button slides in the direction away from the channel sheath body along the interior of the path groove, the push-pull rod and the sliding column are further driven to slide along the inner wall of the sliding cavity, and the sliding column slides to further pull one inhaul cable connected with the sliding column; the guiding head is bent in the direction of one stressed inhaul cable, so that the guiding head is coupled with the bending angle of the urethra of the patient, it is guaranteed that the end of the guiding mechanism does not directly collide with the inner wall of the urethra tube of the patient in the inserting process, discomfort is avoided, and meanwhile inserting is smoother.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an adjustable visible ureteral flexible endoscope channel sheath. Background Art

[0002] The ureteral sheath generally refers to the channel sheath used during surgery, which helps to connect the urethra, thereby improving the disease. It belongs to a kind of medical device. The ureteral sheath usually consists of a sheath tube and a dilator. The surface of the sheath tube is coated with a hydrophilic coating, and it is mostly used in transurethral ureteral flexible endoscope surgery clinically. It helps to achieve the drainage effect during the process, can support the ureter, and at the same time helps the ureteroscope to smoothly enter the kidney. After use, it is beneficial to temporarily reduce the ureteral flow rate. During the operation, it is necessary to be retained through the ureteral channel sheath, which is beneficial to reduce the damage to the ureteral wall; According to a Chinese patent with the application publication number 202311265739.0, an adjustable visible ureteral flexible endoscope channel sheath is disclosed. By injecting perfusion fluid into the interior of the first main channel through an arc-shaped liquid shell, the lubrication of the ureter and urethra is realized, and the friction between the outer layer of the sheath tube and the ureter and urethra is reduced. However, the urethra and ureter are irregularly curved. Due to the lack of an insertion guiding measure in the above-mentioned channel sheath, although relieved by the lubricating fluid, during the actual insertion process, the end of the channel sheath is likely to hit the inner walls of the urethra and ureter, bringing discomfort and pain to the patient. Therefore, we propose an adjustable visible ureteral flexible endoscope channel sheath to solve the above technical problems. Summary of the Invention

[0003] The present invention provides the following technical solutions: An adjustable visible ureteral flexible endoscope channel sheath, comprising: A channel sheath main body, which is internally provided with a plurality of equally angularly distributed rope threading holes, and penetrates through both ends of the channel sheath main body; A guiding mechanism, fixedly installed at the end of the channel sheath main body, for guiding the channel sheath main body; An adjusting mechanism, fixedly installed at one end of the channel sheath main body away from the guiding mechanism, for adjusting the direction of the guiding mechanism; An elastic leather sleeve, fixedly installed on the periphery of the guiding mechanism.

[0004] As a preferred solution of the present invention, the guiding mechanism includes: A guiding head, fixedly installed at the end of the channel sheath main body; Side grooves, equally spaced on the outer wall of the guiding head; Perforations, circumferentially and arrayedly distributed on the side of the guiding head close to the channel sheath main body, and penetrate through the interior of a plurality of side grooves. The positions of the perforations correspond to the positions of the rope threading holes one by one.

[0005] As a preferred solution of the present invention, the adjusting mechanism includes: A grip, fixedly installed at one end of the channel sheath body away from the guiding head; Guide through-holes, equally angularly distributed and opened on one side surface of the grip close to the channel sheath body, and the positions correspond to the rope threading holes one by one; Sliding cavities, equally angularly distributed and opened inside the grip, and the positions correspond to the guide through-holes one by one. The sliding cavities and the guide through-holes are concentric, and the inner diameter of the sliding cavities is larger than the inner diameter of the guide through-holes; Sliding posts, slidably installed inside the sliding cavities; A cable, fixedly installed on one side surface of the sliding posts close to the guide through-holes, passing through the guide through-holes, the rope threading holes and the perforations, and fixedly connected to the surface of the guiding head.

[0006] As a preferred solution of the present invention, the adjusting mechanism further includes: A push-pull rod, fixedly installed on one side surface of the sliding posts away from the cable; A push-pull block, fixedly installed at one end of the push-pull rod away from the sliding posts; A push-pull button, fixedly installed at one end of the push-pull block away from the push-pull rod; Path grooves, equally angularly distributed and opened on the outer wall of the grip, and the push-pull block is slidably installed inside the path grooves.

[0007] As a preferred solution of the present invention, the adjusting mechanism further includes: Connecting guide holes, opened inside the grip, located between two adjacent sliding cavities, and communicating with the two adjacent sliding cavities. The number of the connecting guide holes is multiple, and all the connecting guide holes are located at one end of the sliding cavity close to the guide through-hole; Liquid supply holes, opened on the outer wall of the grip, the positions of the liquid supply holes correspond to the positions of the connecting guide holes, and the liquid supply holes extend into one of the sliding cavities.

[0008] As a preferred solution of the present invention, the adjusting mechanism further includes: A spring, fixedly installed inside the path grooves, and located between the push-pull block and one end inner wall of the path grooves, and the spring is used for the reset of the push-pull block.

[0009] As a preferred solution of the present invention, the guiding mechanism further includes; V-shaped elastic pieces, equally angularly distributed and fixedly installed inside the side grooves, and located around the opening of the perforation. The V-shaped elastic pieces are used for the reset of the guiding head.

[0010] As a preferred solution of the present invention, an elastic leather sleeve, fixedly installed on the outer wall of the guiding head, and a plurality of equally angularly distributed round holes are penetrated through its outer wall. The elastic leather sleeve is located around a plurality of side grooves, and the elastic leather sleeve is in a stretched state.

[0011] As a preferred solution of the present invention, gaps are provided between the outer wall of the cable and the inner wall of the rope threading hole, the inner wall of the through hole and the inner wall of the conducting hole.

[0012] As a preferred solution of the present invention, the outer wall of the sliding column is in sliding contact with the inner wall of the sliding cavity, and a sealing ring is fixedly provided on the outer wall of the sliding column, and the sliding cavity and the sliding column are sealed by the sealing ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by toggling one of the push-pull buttons, a push-pull block corresponding to the push-pull button slides along the inside of the path groove in a direction away from the channel sheath body, further driving the push-pull rod and the slide column to slide along the inner wall of the sliding cavity. The sliding of the slide column further pulls a pull cable connected to it, causing the guide head to bend in the direction of a stressed pull cable, thereby coupling with the patient's urethral curvature angle, ensuring that during the insertion process, the end of the guide mechanism will not directly collide with the inner wall of the patient's urethral tube to avoid discomfort, and also making the insertion smoother.

[0014] 2. In the present invention, after the guide head is bent, the elastic leather cover will be pulled, so that the elastic leather cover bends with the guide head, causing a part of the elastic leather cover close to the bent part of the guide head to rebound. Therefore, the circular hole in this part shrinks, and the elastic leather cover away from the bent part of the guide head is stretched. Therefore, the aperture of the circular hole in this part becomes larger, and the lubricating fluid located inside the side groove flows out more through the circular hole with the enlarged aperture, that is, it flows out from the side where the outer wall of the guide head and the inner wall of the urethra and ureter are stressed, so as to provide concentrated supply to the parts that need local enhanced lubrication, so that the device can be smoothly inserted in the urethra and ureter with curved parts, and at the same time, it can also reduce patient discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the channel sheath body in the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A; Figure 4 It is a structural schematic diagram of the cable in the present invention; Figure 5 It is a structural schematic diagram of the guiding mechanism in the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part B; Figure 7 is a schematic diagram of the side section structure of the handle of the present invention; Figure 8In the present invention Figure 7 is a schematic enlarged view of part C in the present invention; Figure 9 In the present invention Figure 7 is a schematic enlarged view of part D in the present invention; Figure 10 is a schematic partial structure view of the guide head in the present invention.

[0016] In the figure: 100, channel sheath main body; 101, rope threading hole; 200, guiding mechanism; 201, guide head; 202, side groove; 203, perforation; 204, V-shaped elastic piece; 300, adjusting mechanism; 301, grip; 302, guiding through hole; 303, sliding cavity; 304, sliding column; 305, cable; 306, push-pull rod; 307, push-pull block; 308, push-pull button; 309, path groove; 3010, connecting guiding hole; 3011, liquid supply hole; 3012, spring; 400, elastic leather sheath. Specific embodiments

[0017] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 to 10 , the technical solutions provided by the present invention specifically include the following embodiments: An adjustable visible ureteral flexible endoscope channel sheath includes a channel sheath main body 100, a guiding mechanism 200, an adjusting mechanism 300 and an elastic leather sheath 400. A plurality of rope threading holes 101 are provided inside the channel sheath main body 100 and are distributed at equal angles and penetrate through both ends of the channel sheath main body 100. The guiding mechanism 200 is fixedly installed at the end of the channel sheath main body 100 for guiding the channel sheath main body 100. The adjusting mechanism 300 is fixedly installed at one end of the channel sheath main body 100 away from the guiding mechanism 200 for adjusting the direction of the guiding mechanism 200. The elastic leather sheath 400 is fixedly installed on the periphery of the guiding mechanism 200.

[0019] Furthermore, specifically referring to Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 as shown: The guiding mechanism 200 includes a guiding head 201, side grooves 202, perforations 203 and V-shaped elastic pieces 204. The guiding head 201 is fixedly installed at the end of the channel sheath main body 100. The side grooves 202 are equidistantly formed on the outer wall of the guiding head 201. The perforations 203 are circumferentially and arrayedly distributed on one side surface of the guiding head 201 close to the channel sheath main body 100 and penetrate through the interiors of multiple side grooves 202. The positions of the perforations 203 correspond to the positions of the rope passing holes 101 one by one. The adjusting mechanism 300 includes a grip 301, a guide through hole 302, a sliding cavity 303, a sliding column 304 and a cable 305. The grip 301 is fixedly installed at one end of the channel sheath main body 100 away from the guiding head 201. The guide through holes 302 are angularly distributed on one side surface of the grip 301 close to the channel sheath main body 100 and their positions correspond to the rope passing holes 101 one by one. The sliding cavities 303 are angularly distributed inside the grip 301 and their positions correspond to the guide through holes 302 one by one. The centers of the sliding cavities 303 and the guide through holes 302 are concentric. The inner diameter of the sliding cavity 303 is larger than the inner diameter of the guide through hole 302. The sliding column 304 is slidably installed inside the sliding cavity 303. The outer wall of the sliding column 304 is in sliding contact with the inner wall of the sliding cavity 303, and a sealing ring is fixedly arranged on the outer wall of the sliding column 304. The sliding cavity 303 and the sliding column 304 are sealed by this sealing ring. The cable 305 is fixedly installed on one side surface of the sliding column 304 close to the guide through hole 302, penetrates through the guide through hole 302, the rope passing hole 101 and the perforation 203, and is fixedly connected to the surface of the guiding head 201. There are gaps between the outer wall of the cable 305 and the inner walls of the rope passing hole 101, the perforation 203 and the guide through hole 302. The adjusting mechanism 300 further includes a push rod 306, a push block 307, a push button 308 and a path groove 309. The push rod 306 is fixedly installed on one side surface of the sliding column 304 away from the cable 305. The push block 307 is fixedly installed at one end of the push rod 306 away from the sliding column 304. The push button 308 is fixedly installed at one end of the push block 307 away from the push rod 306. The path grooves 309 are angularly distributed on the outer wall of the grip 301. The push block 307 is slidably installed inside the path groove 309. The elastic leather sleeve 400 is fixedly installed on the outer wall of the guiding head 201, and a plurality of circular holes are formed through the outer wall thereof in an angularly distributed manner. The elastic leather sleeve 400 is located outside the multiple side grooves 202 and is in a stretched state.

[0020] Specifically, the doctor sequentially inserts the channel sheath body 100, the guiding mechanism 200, and the elastic sheath 400 through the urethral orifice, urethra, bladder, and ureter and into the renal pelvis. Due to the curvature of the urethra and ureter, when the guiding mechanism 200 reaches the curved position during the insertion process, the operating doctor toggles one of the push-pull buttons 308, causing a corresponding push-pull block 307 to slide along the inside of the path groove 309 away from the channel sheath body 100. This further drives the push-pull rod 306 and the sliding column 304 to slide along the inner wall of the sliding cavity 303. The sliding of the sliding column 304 further pulls a cable 305 connected thereto, causing the guiding head 201 to bend in the direction of the stressed cable 305, thus coupling with the curvature angle of the patient's urethra. This ensures that during the insertion process, the end of the guiding mechanism 200 does not directly hit the inner wall of the patient's urethral tube, avoiding discomfort and making the insertion smoother.

[0021] Furthermore, specifically referring to Figure 8 as shown: The adjusting mechanism 300 further includes a connecting guide hole 3010, a liquid supply hole 3011, and a spring 3012. The connecting guide hole 3010 is opened inside the handle 301 and is located between two adjacent sliding cavities 303 and is connected to the two adjacent sliding cavities 303. The number of connecting guide holes 3010 is multiple, and all the connecting guide holes 3010 are located at one end of the sliding cavity 303 close to the through hole 302. The liquid supply hole 3011 is opened on the outer wall of the handle 301. The position of the liquid supply hole 3011 corresponds to the position of the connecting guide hole 3010, and the liquid supply hole 3011 extends into one of the sliding cavities 303.

[0022] Specifically, during the insertion of the channel sheath, the lubricating fluid pump continuously pumps lubricating fluid into the interior of the liquid supply hole 3011. The lubricating fluid that enters the interior of the liquid supply hole 3011 then flows into the interiors of the remaining multiple guide holes 302 through the guiding holes 302 and the circulation of the multiple connecting guide holes 3010, and is discharged into the gap between the rope threading hole 101 and the cable 305 through the gap between the guide hole 302 and the cable 305. Subsequently, it is discharged into the interiors of the multiple side grooves 202 through the gap between the perforation 203 and the cable 305, and is discharged outward through the multiple circular holes formed inside the elastic leather sleeve 400, lubricating the insertion of the guiding mechanism 200 and the channel sheath main body 100 to avoid discomfort to the patient caused by dryness. Moreover, when the guiding head 201 bends, it will pull on the elastic leather sleeve 400, causing the elastic leather sleeve 400 to bend along with the guiding head 201, resulting in the resilience of a part of the elastic leather sleeve 400 near the bending part of the guiding head 201. Therefore, the circular holes at this part contract, while the elastic leather sleeve 400 away from the bending part of the guiding head 201 is stretched. Therefore, the aperture of the circular holes at this part becomes larger, and more of the lubricating fluid located inside the side groove 202 flows out through the circular holes at this part with a larger aperture, that is, flows out from the side surface of the outer wall of the guiding head 201 where it is stressed with the inner walls of the urethra and the ureter, so as to centrally supply the parts that need local enhanced lubrication in a targeted manner, enabling the device to smoothly penetrate in the urethra and the ureter with a bending part, and at the same time reducing the discomfort of the patient.

[0023] Further, specifically referring to Figure 9 as shown in The spring 3012 is fixedly installed inside the path groove 309 and is located between the push-pull block 307 and one end inner wall of the path groove 309. The spring 3012 is used for the reset of the push-pull block 307.

[0024] Specifically, when the push-pull button 308 is toggled to drive the push-pull block 307 to slide along the inner wall of the path groove 309, the spring 3012 is compressed to generate elastic deformation. Thus, after the external force on the push-pull button 308 is removed, the resilience of the spring 3012 acts on the push-pull block 307 and the push-pull button 308 to reset, ending the pulling force on the cable 305 and facilitating the restoration of the guiding head 201.

[0025] Further, specifically referring to Figure 10 as shown in The V-shaped elastic pieces 204 are fixedly installed inside the side groove 202 at equal angles and are located around the opening of the perforation 203. The V-shaped elastic pieces 204 are used for the reset of the guiding head 201.

[0026] Specifically, after the guiding head 201 is bent, the V-shaped elastic piece 204 undergoes elastic deformation. After the cable 305 finishes pulling the guiding head 201, through the resilience of the V-shaped elastic piece 204, the guiding head 201 can be quickly restored. At the same time, due to the supporting effect of the V-shaped elastic piece 204, during the process of the guiding head 201 passing through the patient's urethra and ureter, it is not easy to deform, so that the penetration effect of the guiding head 201 is better.

[0027] When a kind of adjustable visible ureteral flexible endoscope channel sheath of this solution is working, first connect the output pipe of the lubricating fluid pump to the interface end of the liquid supply hole 3011. When a doctor needs to use this device to perform endoscopic examination and treatment on the renal pelvis of a patient, the doctor first anesthetizes the patient. Then, after disinfecting the channel sheath main body 100, the guiding mechanism 200 and the elastic leather sleeve 400, the doctor sequentially inserts the channel sheath main body 100, the guiding mechanism 200 and the elastic leather sleeve 400 through the urethral orifice, urethra, bladder and ureter and into the renal pelvis. And during the insertion of this channel sheath, the lubricating fluid pump continuously pumps lubricating fluid into the interior of the liquid supply hole 3011. The lubricating fluid entering the interior of the liquid supply hole 3011 then flows into the remaining plurality of guide holes 302 through the guiding holes 302 and the circulation of the plurality of connecting guide holes 3010, and is discharged into the gap between the rope-passing hole 101 and the cable 305 through the gap between the guide hole 302 and the cable 305. Then it is discharged into the interior of the plurality of side grooves 202 through the gap between the perforation 203 and the cable 305, and is discharged outward through the plurality of round holes formed in the elastic leather sleeve 400 to lubricate the insertion of the guiding mechanism 200 and the channel sheath main body 100, avoiding discomfort to the patient caused by dryness. Due to the bending problem of the urethra and ureter, when the guiding mechanism 200 reaches the bending position during the insertion process, the operating doctor toggles one of the push-pull buttons 308, so that a push-pull block 307 corresponding to the push-pull button 308 slides along the interior of the path groove 309 in a direction away from the channel sheath main body 100, further driving the push-pull rod 306 and the sliding column 304 to slide along the inner wall of the sliding cavity 303. The sliding of the sliding column 304 further pulls a cable 305 connected thereto, causing the guiding head 201 to bend in the direction of the stressed cable 305, so as to couple with the bending angle of the patient's urethra, ensuring that during the insertion process, the end of the guiding mechanism 200 will not directly bump against the inner wall of the patient's urethral tube, so as to avoid discomfort, and at the same time making the insertion smoother. Meanwhile, after the guiding head 201 is bent, it will pull on the elastic sheath 400, causing the elastic sheath 400 to bend along with the guiding head 201. As a result, a part of the elastic sheath 400 near the bending part of the guiding head 201 rebounds. Therefore, the round hole at this part shrinks, while the elastic sheath 400 away from the bending part of the guiding head 201 is stretched. Therefore, the aperture of the round hole at this part becomes larger, and more lubricating fluid inside the side groove 202 flows out through the part of the round hole with the enlarged aperture, that is, it flows out from the side surface of the outer wall of the guiding head 201 where it is stressed against the inner walls of the urethra and ureter, so as to centrally supply the parts that need local enhanced lubrication. This enables the device to smoothly penetrate through the urethra and ureter with bending parts, and at the same time can reduce the discomfort of the patient.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An adjustable visual ureteroscope channel sheath, characterized in that: include: A channel sheath body (100) is provided with a plurality of rope threading holes (101) distributed at equal angles therein and penetrating through both ends of the channel sheath body (100); A guiding mechanism (200) is fixedly mounted on the end of the channel sheath body (100) and is used for guiding the channel sheath body (100); An adjustment mechanism (300) is fixedly mounted on one end of the channel sheath body (100) away from the guide mechanism (200) and is used for adjusting the direction of the guide mechanism (200); The elastic leather cover (400) is fixedly mounted on the periphery of the guide mechanism (200).

2. The adjustable visual ureteroscope channel sheath according to claim 1, characterized in that: The guiding mechanism (200) comprises: A guide head (201) is fixedly mounted on the end of the channel sheath body (100); Side grooves (202) are formed at equal intervals on the outer wall of the guide head (201); The perforations (203) are arranged in a circular array on a side surface of the guide head (201) close to the channel sheath body (100) and penetrate the interior of the plurality of side grooves (202). The positions of the perforations (203) correspond one-to-one to the positions of the rope threading holes (101).

3. The adjustable visual ureteroscope channel sheath according to claim 2, characterized in that: The regulating mechanism (300) comprises: A grip (301) is fixedly mounted on an end of the channel sheath body (100) away from the guide head (201); The conducting holes (302) are arranged at equal angles on a side surface of the handle (301) close to the channel sheath body (100), and their positions correspond one to one with the rope threading holes (101); The sliding cavities (303) are arranged inside the handle (301) at equal angles and have positions corresponding to the conducting holes (302). The centers of the sliding cavities (303) and the conducting holes (302) are concentric, and the inner diameter of the sliding cavities (303) is greater than the inner diameter of the conducting holes (302); A sliding column (304) is slidably mounted inside the sliding cavity (303); The cable (305) is fixedly mounted on a side surface of the slide column (304) close to the conducting hole (302), passes through the conducting hole (302), the rope threading hole (101) and the through hole (203), and is fixedly connected to the surface of the guide head (201).

4. The adjustable visual ureteroscope channel sheath according to claim 3, characterized in that: The adjustment mechanism (300) further includes: A push rod (306) is fixedly mounted on a side of the sliding column (304) away from the cable (305); A push-pull block (307) is fixedly mounted on one end of the push-pull rod (306) away from the sliding column (304); A push button (308) is fixedly mounted on an end of the push block (307) away from the push rod (306); The path grooves (309) are arranged on the outer wall of the handle (301) at equal angles, and the push-pull block (307) is slidably mounted inside the path grooves (309).

5. The adjustable visual ureteroscope channel sheath according to claim 4, characterized in that: The adjustment mechanism (300) further includes: A connecting guide hole (3010) is provided inside the handle (301) and is located between two adjacent sliding cavities (303) and is connected to the two adjacent sliding cavities (303). There are a plurality of connecting guide holes (3010) and all of the connecting guide holes (3010) are located at one end of the sliding cavity (303) close to the conducting hole (302); A liquid supply hole (3011) is formed on the outer wall of the handle (301), the position of the liquid supply hole (3011) corresponds to the position of the connecting hole (3010), and the liquid supply hole (3011) extends into one of the sliding cavities (303).

6. The adjustable visual ureteroscope channel sheath according to claim 5, characterized in that: The adjustment mechanism (300) further includes: The spring (3012) is fixedly mounted inside the path groove (309) and is located between the push-pull block (307) and an inner wall at one end of the path groove (309). The spring (3012) is used for resetting the push-pull block (307).

7. The adjustable visual ureteroscope channel sheath according to claim 6, characterized in that: The guiding mechanism (200) further comprises: The V-shaped spring pieces (204) are fixedly mounted inside the side groove (202) at equal angles and are located outside the opening of the through hole (203). The V-shaped spring pieces (204) are used to guide the reset of the head (201).

8. The adjustable visual ureteroscope channel sheath according to claim 7, characterized in that: The elastic leather cover (400) is fixedly mounted on the outer wall of the guide head (201), and a plurality of circular holes distributed at equal angles are penetrated through the outer wall. The elastic leather cover (400) is located outside the plurality of side grooves (202), and the elastic leather cover (400) is in a stretched state.

9. The adjustable visual ureteroscope channel sheath according to claim 8, characterized in that: Gaps are provided between the outer wall of the pull rope (305) and the inner wall of the rope threading hole (101), the inner wall of the through hole (203), and the inner wall of the conducting hole (302).

10. The adjustable visual ureteroscope channel sheath according to claim 9, characterized in that: The outer wall of the sliding column (304) is in sliding contact with the inner wall of the sliding cavity (303), and a sealing ring is fixedly arranged on the outer wall of the sliding column (304), and the sliding cavity (303) and the sliding column (304) are sealed by the sealing ring.

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