TWI900325B - Disposable cystoscopy - Google Patents

Abstract

A disposable cystoscopy comprises a housing, a push-pull rod assembly, and a switching valve. The housing contains a push rod track and an abutment part. The abutment part positioned on one side of the push rod track. The push-pull rod assembly includes a rod body and a valve shaft. One end of the rod body connected to the valve shaft. The switching valve includes a first valve passage, an elastic seal element, a valve body opening, a first irrigation channel, and a suction channel. The elastic seal element is positioned within the first valve passage, dividing it into an irrigation area and a suction area. One end of the first irrigation channel connects to the irrigation area, and one end of the suction channel connects to the suction area. The push-pull rod assembly moves the elastic seal element within the first valve passage. When the elastic seal element is in the irrigation area, the valve body opening connects with the suction area, and when the elastic seal element is in the suction area, the valve body opening connects with the irrigation area.

Description

Disposable ureteroscope

The present invention relates to the field of endoscopy, and in particular to a disposable ureteroscopic endoscope.

The suction system of a ureteroscopic endoscope is primarily used to remove debris, blood, and other fluids from the urinary tract during surgery, maintaining a clear view of the surgical area and facilitating the procedure. The design must ensure sufficient suction to remove debris and fluid from the surgical area, while precisely regulating pressure and flow rate to avoid damaging the delicate ureteral tissue. Typically, the suction system of a ureteroscope has two separate switches to control the suction and irrigation functions, respectively. This allows the operator to precisely control the suction on/off and intensity using a foot switch or a push-button on the handle. Alternatively, during surgery, the physician can activate the irrigation system at any time to allow cleaning fluid to flush out blood or debris, preventing obstruction of vision. This allows the physician to choose between suction and irrigation at different stages of the procedure. However, since the operator needs to switch between suction and irrigation during surgery, separate control switches mean that each time suction or irrigation is required, the corresponding function must be manually activated. This can not only prolong the surgical procedure but also increase the complexity of the operation for the operator, while also increasing the structural complexity and component cost.

Therefore, the present invention addresses the above-mentioned problems of the prior art and further proposes a disposable ureteroscope to solve the problems arising from the prior art.

In view of the above problems, one of the main objectives of the present invention is to provide a method for simultaneously controlling the suction and irrigation functions through a single component, thereby simplifying the structural design, reducing manufacturing costs, increasing operational flexibility and convenience, and at the same time, facilitating the compactness of the internal structure and reducing the overall volume.

To achieve the above objectives, the present invention provides a disposable ureteroscope comprising a housing, a push-pull rod assembly, a switching valve, and a working channel. The housing contains a push-rod track and a stopper located on one side of the push-rod track. The push-pull rod assembly comprises a rod and a valve shaft. A portion of the rod is positioned within the push-rod track, while another portion extends beyond the track. One end of the rod is positioned within the housing, while the other end is connected to the valve shaft. The switching valve includes a first valve channel, an elastic seal, a valve opening, a first irrigation channel, and a suction channel. The elastic seal is disposed within the first valve channel. A valve shaft passes through the valve opening of the first valve channel and connects to the elastic seal, such that the valve shaft is positioned between the stem and the elastic seal. The elastic seal divides the first valve channel into an irrigation zone and a suction zone. One end opening of the first irrigation channel connects to the irrigation zone, while one end opening of the suction channel connects to the suction zone. The other end openings of the first irrigation channel, the suction channel, and the valve opening protrude outside the first valve channel. A working channel connects to the valve opening. When the push-pull rod assembly drives the elastic seal to move within the first valve body channel, it moves to the irrigation area or the suction area. When the elastic seal is in the irrigation area, the working channel, the valve body opening, and the suction area are connected. When the elastic seal is in the suction area, the working channel, the valve body opening, and the irrigation area are connected.

In some embodiments of the present invention, the push-pull rod assembly further includes a pressing member, a protrusion, a guide shaft, and an elastic member. The top of the pressing member is exposed on the surface of the housing, and the bottom of the pressing member is connected to the end of the rod. The protrusion is located on one side of the rod, facing the abutment. The guide shaft is located with the protrusion facing the abutment and passes through the abutment. The elastic member is sleeved on the guide shaft, with one end of the elastic member abutting the abutment and the other end abutting the bottom of the guide shaft.

In some embodiments of the present invention, the disposable ureteroendoscope further includes an integrated unit. The integrated unit includes a second valve channel, a second irrigation channel, and an insertion tube. The valve port of the second valve channel is connected to the valve opening via a working channel. The other end of the second valve channel is connected to the insertion tube. A portion of the insertion tube is exposed outside the housing. One end of the second irrigation channel is connected to the second valve channel.

In some embodiments of the present invention, the disposable ureteroscope further includes an optical fiber channel and an optical fiber branch channel. The optical fiber channel is disposed within the housing for passage of an optical fiber cable. The optical fiber branch channel is disposed through the sidewall of the valve body opening, allowing the optical fiber cable to sequentially pass through the optical fiber branch channel and the second valve body channel into the aforementioned insertion tube.

In some embodiments of the present invention, the valve shaft is provided with a connecting hole, the through-hole direction of which intersects with the movement direction of the rod. The other end of the rod is provided with a protrusion corresponding to the connecting hole. The protrusion is inserted into the connecting hole to connect the rod to the valve shaft.

In some embodiments of the present invention, the push rod track is provided with two opposing walls and a plurality of guide structures. The plurality of guide structures are disposed on opposing sides of the two walls to limit and guide the movement direction of the rod. A support structure is disposed between the two walls to provide support for the rod.

In some embodiments of the present invention, a plurality of notches are provided on the surface of the rod body at locations corresponding to the bends of the push rod track.

In some embodiments of the present invention, when viewed from the valve opening of the first valve channel toward the bottom of the first valve channel, the first direction extends from the center of the first valve channel to the position where it is fixed to the housing, while the second direction extends from the center of the valve opening of the first valve channel to the center of the valve opening. The angle between the first and second directions is 65-75 degrees.

In some embodiments of the present invention, the angle between the axis of the first valve body passage and the axis of the valve body opening is 30 to 60 degrees.

In some embodiments of the present invention, the angle between the axis of the second valve channel and the axis of the second irrigation channel is 30 to 60 degrees.

In some embodiments of the present invention, the elastic seal further includes a connecting shaft, a first sealing gasket, and a second sealing gasket. The first sealing gasket and the second sealing gasket are located at the two ends of the connecting shaft, respectively. The periphery of the first sealing gasket and the periphery of the second sealing gasket are in close contact with the inner wall of the first valve passage, respectively. The cross-sectional area of the connecting shaft is smaller than the cross-sectional area of the first valve passage.

In some embodiments of the present invention, the integrated unit further includes an integrated upper cover that covers the end of the second valve body passage proximate to the valve body opening. The integrated upper cover is provided with a plurality of through-holes. A rubber groove is protruding from the surface of the integrated upper cover, and the rubber injection area of the rubber groove covers the positions of the plurality of through-holes.

In some embodiments of the present invention, the disposable ureteroscopic device further includes an aspiration tube, a first irrigation tube, and a second irrigation tube. The aspiration tube has one end connected to the aspiration channel and the other end extending to the exterior of the housing. The first irrigation tube has one end connected to the first irrigation channel and the other end extending to the exterior of the housing. The second irrigation tube has one end connected to the second irrigation channel and the other end extending to the exterior of the housing.

As described above, the disposable ureteroscope of the present invention utilizes a single push-button mechanism to perform both suction and irrigation functions, streamlining the procedure and making the surgical process faster and more accurate. It also improves the smooth insertion of the working channel, facilitating easier insertion of the switching valve and enhancing operational smoothness. The switching valve structure improves space utilization and shortens the switching stroke time without compromising fluid flow. This not only enhances operational efficiency but also simplifies the structure and reduces costs.

10: Shell

12: Putting Track

122: Wall

124: Guidance Structure

126: Support structure

14: Abutment

20: Push-pull rod assembly

21: Shaft

211: Camshaft

213: Gap

22: Valve shaft

221: Connection hole

23: Pressing element

231: Top

233: Bottom

24: Bump

25: Guide shaft

26: Elastic parts

30: Switching valve

31: First valve channel

311: Valve

32: Elastic seal

322: Connecting shaft

324: First sealing gasket

326: Second sealing gasket

33: Valve body opening

331: Valve cover

34: First irrigation channel

35: Suction channel

36: Fixed part

37: Front cover

371: Perforation

W: Working channel

40: Integration Unit

42: Second valve channel

422: Valve

44: Second irrigation channel

46: Insertion tube

48: Integrated cover

482:Through hole

484: Adhesive Tank

486:Colloid

A1: Irrigation Area

A2: Suction area

D1: First Direction

D2: Second Direction

θ1, θ2, θ3: Inclusion angles

51: Suction tube

52: First irrigation tube

53: Second irrigation tube

70: Fiber Channel

72: Fiber optic branch channel

80: Fiber optic cable

91: Signal cable

92: Control Cables

R: Local area

Figure 1 is a schematic diagram of one embodiment of the disposable ureteroscope of the present invention; Figure 2 is a cross-sectional view of one embodiment of the disposable ureteroscope of the present invention; Figure 3 is a schematic diagram of the push-pull rod assembly of the disposable ureteroscope of the present invention; Figure 4 is an exploded schematic diagram of the push-pull rod assembly of the disposable ureteroscope of the present invention; Figure 5A is a schematic diagram of the housing of the disposable ureteroscope of the present invention; Figure 5 Figure B is an enlarged view of the local area R in Figure 5A; Figures 6 to 9 are schematic diagrams of the switching valve of the disposable ureteroscope of the present invention at different angles; Figures 10 and 11 are cross-sectional views of the switching valve of Figure 9 in different states; Figures 12 to 14 are schematic diagrams of the integrated unit of the disposable ureteroscope of the present invention at different angles; Figure 15 is a schematic diagram of another embodiment of the disposable ureteroscope of the present invention.

The embodiments of the present invention are further explained below with reference to the relevant figures. Whenever possible, identical reference numerals in the drawings and the specification represent identical or similar components. In the drawings, shapes and thicknesses may be exaggerated for simplicity and convenience. It should be understood that components not specifically shown in the drawings or described in the specification are well known to those skilled in the art. Those skilled in the art may make various changes and modifications based on the teachings of the present invention.

In the specification and patent application, if a first element is described as being on, above, connected to, bonded to, coupled to, or in contact with a second element, this means that the first element may be directly on, directly connected to, directly bonded to, or directly coupled to the second element, or it may mean that there are other elements between the first and second elements. In contrast, if a first element is described as being directly on, directly connected to, directly bonded to, directly coupled to, or directly in contact with the second element, this means that there are no other elements between the first and second elements.

The following describes a disposable ureteroscope. The following figure shows only one side of the housing, allowing those with ordinary skill in the art to clearly understand the structure and function of the internal components by referring to the following text without ambiguity in understanding the other side of the housing.

Referring to Figures 1 and 2 , the disposable ureteroscope includes a housing 10, a push-pull rod assembly 20, a switching valve 30, and a working channel W. Housing 10 houses a push-rod track 12 and an abutment 14, located on one side of the push-rod track 12. Push-pull rod assembly 20 includes a rod 21 and a valve shaft 22. A portion of rod 21 is positioned within push-rod track 12, while another portion extends outside of the track. One end of rod 21 is positioned within housing 10, while the other end is connected to valve shaft 22. The switching valve 30 includes a first valve body channel 31, an elastic seal 32, a valve body opening 33, a first irrigation channel 34, and a suction channel 35. The working channel W is connected to the valve body opening 33. As shown in Figure 2, the elastic seal 32 is arranged in the first valve channel 31, and the valve shaft 22 passes through the valve port 311 of the first valve channel 31 and is connected to the elastic seal 32, so that the valve shaft 22 is located between the rod 21 and the elastic seal 32. The elastic seal 32 divides the first valve channel 31 into an irrigation area A1 and a suction area A2. One end opening of the first irrigation channel 34 is connected to the irrigation area A1, and one end opening of the suction channel 35 is connected to the suction area A2. The other end openings of the first irrigation channel 34, the suction channel 35 and the valve opening 33 protrude outside the first valve channel 31. The push-pull rod assembly 20 drives the elastic seal 32 within the first valve passage 31, causing it to move to either the irrigation area A1 or the suction area A2. When the elastic seal 32 is in the irrigation area A1, the working channel W, the valve opening 33, and the suction area A2 are connected. When the elastic seal 32 is in the suction area A2, the working channel W, the valve opening 33, and the irrigation area A1 are connected.

Therefore, when the present invention is applied to a cystoscopic device, when the rod 21 is not moving, the elastic seal 32 is located in the suction area A2, opening the irrigation channel and closing the suction channel, thereby effectively injecting fluid into the bladder. When the rod 21 is displaced, the displacement of the rod 21 drives the elastic seal 32 to the irrigation area A1, closing the irrigation channel and opening the suction channel, thereby effectively aspirating lithotripsy.

Continuing with Figures 1 and 2, the disposable ureteroscope also includes an integrated unit 40. This integrated unit 40 comprises a second valve channel 42, a second irrigation channel 44, and an insertion tube 46. The valve port 422 of the second valve channel 42 connects to the valve opening 33 via the working channel W. The other end of the second valve channel 42 is connected to the insertion tube 46, a portion of which is exposed outside the housing 10. One end of the second irrigation channel 44 connects to the second valve channel 42. The integrated unit 40 combines the irrigation channels and integrates all functional plumbing. It connects the first and second irrigation channels 34, 44 via the second valve channel 42, allowing these components to be fed through different channel inlets and discharged through the same outlet.

As shown in Figure 1, the disposable ureteroscopic endoscope also includes a suction tube 51, a first irrigation tube 52, and a second irrigation tube 53. One end of the suction tube 51 is connected to the suction channel 35, and the other end extends to the exterior of the housing 10. One end of the first irrigation tube 52 is connected to the first irrigation channel 34, and the other end extends to the exterior of the housing 10. One end of the second irrigation tube 53 is connected to the second irrigation channel 44, and the other end extends to the exterior of the housing 10.

Each component will be further described below in conjunction with Figure 1. Please note that since the overall structure will be more clearly understood with Figure 1, components that are identical to those previously described will be directly labeled with component symbols without further explanation.

Referring to Figure 3, the push-pull rod assembly 20 further includes a pressing member 23, a bump 24, a guide shaft 25, and an elastic member 26. The top portion 231 of the pressing member 23 is exposed on the surface of the housing 10, while the bottom portion 233 of the pressing member 23 is connected to the corresponding end of the rod 21. The bump 24 is located on one side of the rod 21, facing the abutment 14. The guide shaft 25 is located with the bump 24 facing the abutment 14 and passes through the abutment 14. The elastic member 26 is sleeved on the guide shaft 25, with one end of the elastic member 26 abutting the abutment 14 and the other end abutting the bottom of the guide shaft 25.

The pressing member 23 can be a button or a protruding structure connected to the rod 21, without limitation. The elastic member 26 can be a spring or a structure capable of returning the push-pull rod assembly 20 to its original position through a push-pull stroke. In the implementation of the present invention, the housing 10 serves as the operator's grip. Therefore, positioning the pressing member 23 on the housing 10 facilitates the operator's external pressure on the pressing member 23 to quickly advance the rod 21 within. The rod 21 can be made of a flexible and resilient material (e.g., nylon), allowing the pressing member 23 to slightly bend the rod 21. Preferably, a portion of the rod 21 is a hard section to facilitate support and prevent breakage. The travel distance of the push-pull rod assembly 20 is typically designed based on the overall structural dimensions. In this embodiment, it is preferably 5-6 mm. Combined with the structural design of the switching valve 30, the disposable ureteroscope of the present invention can shorten the overall travel distance, allowing for efficient, quick, and accurate switching between irrigation and aspiration modes.

In some embodiments of the present invention, a plurality of notches 213 are provided on the surface of the rod 21 at the bends corresponding to the push rod track 12 to reduce the stress generated during operation of the push-pull rod assembly 20.

Refer to Figure 4. The valve shaft 22 of the push-pull rod assembly 20 is provided with a connecting hole 221. The direction of the through hole 221 intersects the direction of movement of the rod 21. The other end of the rod 21 is provided with a protrusion 211 corresponding to the connecting hole 221. The protrusion 211 is inserted into the connecting hole 221, connecting the rod 21 to the valve shaft 22.

Referring to Figures 5A and 5B , the push rod track 12 comprises two opposing walls 122 and a plurality of guide structures 124 . The guide structures 124 are positioned on opposing sides of the walls 122 to limit and guide the movement of the rod 21 . A support structure 126 is positioned between the walls 122 to provide support for the rod 21 . The support structure 126 extends from the walls 122 toward the inner surface of the housing. In some embodiments, the support structure 126 is preferably a semicircular protrusion to minimize contact with the housing 10 and reduce friction during movement.

Therefore, the wall surface 122 and the guide structure 124 allow the rod 21 to displace tangentially, allowing the force acting on the pressing member 23 to be converted into an axial force to push the switching valve 30 through the angle change of the push rod track 12.

Please refer to Figures 6 to 8 for an introduction to the internal features of the switching valve 30. As shown in Figure 6, viewing from the valve opening 311 of the first valve channel 31 toward the bottom of the first valve channel 31, the first direction D1 extends from the center of the first valve channel 31 to the point where it is fixed to the housing 10 (fixing portion 36). The second direction D2 extends from the center of the valve opening 311 of the first valve channel 31 to the center of the valve opening 33. The angle θ1 between the first and second directions D1 and D2 is preferably 65-75 degrees. In Figure 6, the fixing portion 36 indicates the connection between the switching valve 30 and the housing 10. The fixing portion 36 can be connected to the housing 10 by means of snap-fitting or adhesive bonding, but is not limited thereto. As shown in Figure 7, the angle θ2 between the axial direction of the first valve channel 31 and the axial direction of the valve opening 33 is between 30 and 60 degrees. The design angle of the valve opening 311 of the first valve channel 31 can be adjusted to match the input/output direction and the suction fluid guidance characteristics of the valve opening 33. In this embodiment, the preferred angle design ensures smoother irrigation and suction functions during operation. This reduces the switching stroke of the switching valve 30 without reducing the fluid flow rate.

As shown in Figure 8, the valve body opening 33 is non-circular and can be fitted with a valve cap 331. A small hole is provided in the valve cap 331, offset from the center. This allows the working channel W to branch out with minimal travel, reducing the switching stroke. Furthermore, glue can be applied around the small hole and the working channel W to achieve a complete seal.

Please refer to Figures 9 to 11. Figure 9 is a schematic external view of the switching valve 30, while Figures 10 and 11 are cross-sectional views of Figure 9 in different states. As shown in Figure 9, the switching valve 30 also includes a front cover 37, which covers the valve port 311 of the first valve body channel 31. The front cover 37 has a through-hole 371 in its center, connecting the through-hole 371 to the valve port 311. The valve shaft 22 (see symbol 22 in Figure 4) can sequentially pass through the through-hole 371 of the front cover 37 and the valve port 311 of the first valve body channel 31, and then connect to the elastic seal 32. As shown in Figures 10 and 11, the elastic seal 32 includes a connecting shaft 322, a first sealing washer 324, and a second sealing washer 326. The first and second sealing washers 324 and 326 are located at either end of the connecting shaft 322. The peripheries of the first and second sealing washers 324 and 326 respectively closely contact the inner wall of the first valve passage 31. The cross-sectional area of the connecting shaft 322 is smaller than that of the first valve passage 31. The elastic seal 32 not only effectively controls the area through which fluid flows, but the design of the connecting shaft 322 also shortens the travel of the first sealing gasket 324 and the second sealing gasket 326, making the overall structure smaller and the internal structure more compact.

As shown in Figure 10, when the elastic seal 32 is located in the suction area A2, the valve opening 33 is in communication with the irrigation area A1. The arrows in the figure indicate the direction of fluid movement and are for illustrative purposes only and are not intended to be limiting. Therefore, when the valve opening 33 is connected to the first irrigation channel 34, fluid can be injected through the first irrigation tube 52 and flow along the first irrigation channel 34 to the valve opening 33, where it can then flow into the bladder.

As shown in Figure 11, when the elastic seal 32 moves from the suction area A2 to the lavage area A1, the valve opening 33 is connected to the suction area A2, but the valve opening 33 is isolated from the lavage area A1. Therefore, when the valve opening 33 is connected to the suction channel 35, the stone fragments inside the bladder can be expelled through the valve opening 33, the suction channel 35, and the suction tube 51 using an external vacuum. The arrows in the figure indicate the direction of gas and stone fragment movement and are for illustration only and are not intended to be limiting.

Referring to Figures 12-14 , the integrated unit 40 further includes an integrated cover 48 , which covers the end of the second valve body passage 42 near the valve body opening 33 . The integrated cover 48 is provided with a plurality of through-holes 482 . These through-holes 482 may include holes for signal lines, working channels, optical fibers, and control cables, allowing cables such as the working channel W, control cable 92 , signal line 91 , and optical fiber cable 80 to be inserted into these through-holes 482 . Therefore, the integrated cover 48 bundles the working channel W, control cable 92, signal cable 91, and optical cable 80 within the insertion tube 46. This reduces cable clutter and prevents entanglement and wear during operation. It also allows for proper isolation and alignment when adjustments or maintenance are required.

As shown in Figure 13, the angle θ3 between the axial direction of the second valve channel 42 and the axial direction of the second irrigation channel 44 is preferably between 30 and 60 degrees. This reduces turbulent flow conflicts when the fluid flows within the second irrigation channel 44, thereby improving the irrigation effect.

As shown in Figure 14 , the surface of the integrated upper cover 48 is provided with a protruding adhesive groove 484. The adhesive injection area of the adhesive groove 484 covers the locations of the plurality of through-holes 482. After the various wires are inserted into the through-holes 482, a biocompatible adhesive 486 is injected into the adhesive groove 484 to bond them. Once the adhesive groove 484 is filled with adhesive 486, liquid leakage out of the second valve channel 42 is prevented. It also securely secures the working channel W, signal cable 91, control cable 92, and optical cable 80. This eliminates the need for additional O-rings or waterproof materials for sealing, improving waterproofing performance and reducing costs.

Referring to Figure 15 , the disposable ureteroscope also includes an optical fiber channel 70 and an optical fiber branch channel 72. A portion of the optical fiber channel 70 may be disposed within the housing 10 to allow the passage of an optical fiber cable 80. The optical fiber branch channel 72 is formed through the sidewall of the valve body opening 33, allowing the optical fiber cable 80 to sequentially pass through the optical fiber branch channel 72, the second valve body channel 42, and into the aforementioned insertion tube 46.

In summary, the disposable ureteroscopic endoscope of the present invention has the following functions:

(1) Simplified operation: The suction and irrigation functions of the endoscope are realized through a single button, simplifying the operation process and making the surgical process faster and more accurate.

(2) Improve the smoothness of the insertion of the working channel: The valve opening is designed at a specific angle, making it easier to insert the switching valve into the working channel and improving the smoothness of the operation.

(3) Improve space utilization: By designing the valve opening at a specific angle, a small working channel can be branched out in the shortest stroke, thereby improving space utilization efficiency.

(4) Shorten switching time: The opening design of the switching valve helps shorten the switching stroke time without affecting the flow rate of the liquid, thereby improving the operating efficiency of the equipment.

(5) It has two irrigation channels, providing more flexible usage options and facilitating cleaning and operation.

(6) Simplified structure and reduced costs: No need for waterproof parts such as O-rings, reducing costs and simplifying the structure.

The above descriptions are merely examples of preferred embodiments of the present invention and are not intended to limit the scope of implementation. Any simple substitutions and equivalent variations made within the scope of the patent application and the contents of the patent specification are also within the scope of the present invention's patent application.

10: Shell

21: Shaft

22: Valve shaft

31: First valve channel

311: Valve

32: Elastic seal

33: Valve body opening

34: First irrigation channel

35: Suction channel

42: Second valve channel

422: Valve

44: Second irrigation channel

46: Insertion tube

W: Working channel

A1: Irrigation Area

A2: Suction area

Claims (16)

A disposable ureteroscope comprises: A housing, wherein a push rod track and an abutment portion are disposed within the housing, the abutment portion being located on one side of the push rod track; A push-pull rod assembly, comprising a rod and a valve shaft, wherein a portion of the rod is disposed within the push rod track and another portion of the rod extends outside the push rod track. One end of the rod is disposed within the housing, and the other end of the rod is connected to the valve shaft. A single-change valve comprises a first valve channel, an elastic seal, a valve opening, a first irrigation channel, and a suction channel. The elastic seal is disposed within the first valve channel, and the valve shaft passes through the valve opening of the first valve channel and is connected to the elastic seal, such that the valve shaft is positioned between the stem and the elastic seal. The elastic seal divides the first valve channel into an irrigation zone and a suction zone. One end opening of the first irrigation channel is connected to the irrigation zone, and one end opening of the suction channel is connected to the suction zone. The other end openings of the first irrigation channel, the suction channel, and the valve opening protrude outside the first valve channel; and a working channel is connected to the valve opening. When the push-pull rod assembly drives the elastic seal to move within the first valve body channel, the elastic seal is displaced to the irrigation area or the suction area. When the elastic seal is located in the irrigation area, the working channel, the valve body opening, and the suction area are in communication. When the elastic seal is located in the suction area, the working channel, the valve body opening, and the irrigation area are in communication. In the disposable ureteroscope of claim 1, the push-pull rod assembly further comprises: a pressing member, the top portion of which is exposed on the surface of the housing and the bottom portion of which is connected to the end of the rod; a protrusion disposed on a side of the rod facing the abutment portion; a guide shaft disposed with the protrusion facing the abutment portion and extending through the abutment portion; and an elastic member sleeved on the guide shaft, with one end of the elastic member abutting the abutment portion and the other end abutting the bottom portion of the guide shaft. The disposable ureteroscopic device of claim 1 further comprises: An integrated unit comprising a second valve channel, a second irrigation channel, and an insertion tube. The valve port of the second valve channel is connected to the valve opening via the working channel. The other end of the second valve channel is connected to the insertion tube. A portion of the insertion tube is exposed outside the housing. One end opening of the second irrigation channel is connected to the second valve channel. The disposable ureteroscope of claim 3 further comprises: an optical fiber channel disposed in the housing for passage of an optical fiber cable; and an optical fiber branch channel extending through the side wall of the valve body opening, allowing the optical fiber cable to sequentially pass through the optical fiber branch channel, the second valve body channel, and the insertion tube. The disposable ureteroscope as described in claim 3, wherein the angle between the axis of the second valve channel and the axis of the second irrigation channel is 30-60 degrees. The disposable ureteroscope of claim 3, wherein the integrated unit further comprises: An integrated upper cover, which covers the end of the second valve body passage proximal to the valve body opening, the integrated upper cover having a plurality of through-holes. The disposable ureteroscope as described in claim 6, wherein a glue groove is protruding from the surface of the integrated upper cover, and the glue injection area of the glue groove covers the positions of the multiple through holes. As described in claim 1, the disposable ureteroendoscope is provided with a connecting hole on the valve shaft, the through-hole direction of the connecting hole is staggered with the moving direction of the rod, and the other end of the rod is provided with a protrusion corresponding to the connecting hole, which is passed through the connecting hole to connect the rod to the valve shaft. As described in claim 1, the disposable ureteroscope, wherein the push rod track is provided with two opposite walls and a plurality of guide structures, wherein the plurality of guide structures are respectively provided on opposite sides of the two walls for limiting and guiding the movement direction of the rod body. The disposable ureteroscope as described in claim 9, wherein a supporting structure is provided between the two walls, and the supporting structure provides support for the rod. The disposable ureteroscope according to claim 1, wherein a plurality of notches are provided on the surface of the rod at positions corresponding to the bends of the push rod track. A disposable ureteroscope as described in claim 1, wherein, when viewing from the valve opening of the first valve channel toward the bottom of the first valve channel, the first direction is from the center of the first valve channel to the position where it is fixed to the housing, and the second direction is from the center of the valve opening of the first valve channel to the center of the valve opening, and the angle between the first direction and the second direction is 65-75 degrees. The disposable ureteroscope as described in claim 1, wherein the angle between the axis of the first valve body channel and the axis of the valve body opening is 30-60 degrees. The disposable ureteroscope as described in claim 1, wherein the elastic seal further includes a connecting shaft, a first sealing gasket and a second sealing gasket, the two ends of the connecting shaft are the first sealing gasket and the second sealing gasket respectively, and the periphery of the first sealing gasket and the periphery of the second sealing gasket are respectively in close contact with the inner wall of the first valve channel, and the cross-sectional area of the connecting shaft is smaller than the cross-sectional area of the first valve channel. The disposable ureteroscope of claim 1 further comprises: a suction tube, one end of which is connected to the suction channel and the other end of which extends to the exterior of the housing; and a first irrigation tube, one end of which is connected to the first irrigation channel and the other end of which extends to the exterior of the housing. The disposable ureteroscope of claim 3 further comprises: A second irrigation tube, one end of the second irrigation tube being connected to the second irrigation channel and the other end extending to the exterior of the housing.