Disposable ureteroscope and lithotripsy and lithotripsy device

Abstract

The invention discloses a disposable ureteroscope and a lithotripsy and discharge device, and belongs to the technical field of urinary surgery minimally invasive surgical instruments, the disposable ureteroscope and lithotripsy and discharge device comprises an insertion assembly comprising a head end seat, a camera module assembled on the head end seat, a temperature and pressure sensor assembled on the head end seat, a snake bone connected with the head end seat, and a hose connected with the snake bone; the head end seat is provided with at least two channels; wherein one channel is configured as a water injection channel, and the other channel is configured as a suction intervention channel; the handle assembly is connected with the insertion assembly; according to the disposable ureteroscope and lithotripsy and lithotripsy device, the pressure sensor is matched with the suction channel and the water injection channel in function, so that the effect of controlling temperature and pressure is achieved, the risk of an operation is greatly reduced, and the safety of a patient is guaranteed; compared with an existing soft lens technology, a hard lens and a sheath do not need to participate in guiding, the system can directly enter the body of a patient, the operation process is reduced, and the operation difficulty is lowered.

Description

Technical Field

[0001] This invention belongs to the field of minimally invasive surgical instruments in urology, specifically relating to a disposable ureteroscope and a lithotripsy and stone removal device. Background Technology

[0002] Traditional flexible ureteroscopy involves first inserting a rigid ureteroscope through the urethra to the bladder, then locating the ureteral orifice. A guidewire is then advanced through the urethra, bladder, and ureteral orifice, following the guidewire up the ureter directly to the stone site or passing beside it. After the guidewire passes, a sheath is inserted into the patient's body along the guidewire. Finally, the flexible ureteroscope, guided by the sheath, is inserted into the ureteral orifice. After laser lithotripsy, the flexible ureteroscope and sheath are withdrawn, and a ureteral stent is then inserted into the patient's body along the guidewire. The catheter is left in place and removed one day post-surgery. The ureteral stent is removed 4-8 weeks later.

[0003] However, the above design has the problems of requiring more materials and a rigid ureteroscope; the surgical steps are more numerous and the operation is more complicated, which greatly increases the risk of injury to patients. Therefore, it is necessary to develop a new disposable ureteroscope and lithotripsy device to solve the existing problems. Summary of the Invention

[0004] The purpose of this invention is to provide a disposable ureteroscope and lithotripsy device to address the problem of high risk of injury for patients undergoing lithotripsy surgery.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a disposable ureteroscope, comprising: The insertion assembly includes: a headstock, a camera module mounted on the headstock, a temperature and pressure sensor mounted on the headstock, a snake bone connected to the headstock, and a flexible tube connected to the snake bone. The headstock has at least two channels, one of which is configured as a water injection channel and the other is configured as a suction intervention channel for attracting lithotripsy and instrument intervention. A handle assembly, connected to the insertion assembly; The water inlet volume of the water injection channel is controlled based on the temperature and pressure data obtained from the temperature and pressure sensor.

[0006] Preferably, the head end base includes: a head end body and a head end shell sleeved on the head end body. The head end body is provided with a head end body water injection channel and a head end body suction intervention channel; The head end shell is provided with a shell water injection channel and a shell suction intervention channel connected to the head end body suction intervention channel; The water injection channel of the shell extends in an arc along the direction of water flow, forming a water injection port on the surface of the shell at the head end that can spray a funnel-shaped vortex.

[0007] Preferably, the suction intervention channel of the head end body protrudes from the surface of the head end body to form a suction intervention channel protrusion. After the head end body and the head end shell are assembled, the suction intervention channel protrusion and the head end shell form a water injection cavity, and the water injection cavity is connected to the water injection port.

[0008] Preferably, the suction intervention channel of the shell extends away from the suction intervention channel of the head body to form a suction intervention port, and the inner wall of the suction intervention port protrudes in the axial direction to form a constriction for blocking the passage of gravel of a set diameter.

[0009] Preferably, the end face of the suction inlet has a sloping structure.

[0010] Preferably, the head end body is further provided with a first cable channel, which is configured to accommodate the camera module cable; The second cable channel is configured to accommodate a temperature and pressure sensor cable.

[0011] Preferably, the head end housing is provided with a first mounting hole for assembling a camera module and a second mounting hole for assembling a temperature and pressure sensor; The first cable channel and the second cable channel protrude from the surface of the head end body to form cable channel protrusions. The cable channel protrusions and the suction intervention channel protrusions form a protrusion. The protrusions abut against the mounting portion of the head end housing to form a sealing structure for isolating the water injection cavity.

[0012] Preferably, there are four water inlets, which are arranged on the side of the head end shell; In this embodiment, the first mounting hole and the suction inlet are both located on the end face away from the snake bone, the four water inlets and the second mounting hole are all located on the side of the head end shell, and the second mounting hole is closer to the snake bone than the four water inlets. The four water inlets and the four water inlet channels of the shell are all rectangular in shape; the water inlets and the suction inlet are both circular in shape and are axially symmetrically distributed on the side of the head end shell, and the diameter of the suction inlet is larger than the diameter of the water inlet.

[0013] Preferably, the handle assembly includes: a handle housing; A channel connector that connects to the handle housing; A wire attached to the snake bone for controlling its bending and positioning; A wire-drawing turntable is rotatably connected to the handle housing for pulling and drawing wires; A lever that controls the rotation of the wire drawing turntable; An expansion tube holder connected to the end of the handle housing for inserting the expansion tube; And a direction adjuster, with one end connected to the end of the hose and the other end connected to the handle housing, for rotating the hose angle to rotate and position the head end seat along the axis.

[0014] Preferably, the wire drawing turntable includes: a turntable body connected to the handle housing; A rotating hole is provided in the rotating connection between the turntable body and the handle housing; At least one wire drawing groove is provided on the main body of the turntable; And an adjustment groove for adjusting the wire drawing length; The wire drawing adjustment groove includes multiple adjustment blocks arranged in a matrix, forming multiple adjustment grooves with different lengths relative to the wire drawing groove outlet. The adjustment grooves are matched with metal blocks at the wire drawing end, and the metal blocks are assembled in adjustment grooves with different lengths relative to the wire drawing groove outlet. The drawing groove is provided in multiple ways, and each drawing groove is at a different distance from the rotating hole. In this embodiment, the drawing groove includes a first drawing adjustment groove and a second drawing adjustment groove, wherein the distance between the first drawing adjustment groove and the center of the rotating hole is greater than the distance between the second drawing adjustment groove and the center of the rotating hole. Depending on the specifications of the headstock, the wire drawing assembly is fitted into different wire drawing grooves, thereby enabling the same wire drawing and handle to be adapted to different headstocks, improving flexibility. Furthermore, the wire drawing adjustment groove can keep the wire drawing force within the optimal range, improving the precision of operation.

[0015] Preferably, the direction adjuster includes: a rotating seat connected to the hose and the handle housing respectively, an adjustment knob fixed on the rotating seat for rotating the rotating seat, and a limit groove provided at the end of the handle portion of the rotating seat, the limit groove cooperating with a limit rod provided on the handle housing to facilitate the positioning of the rotating seat.

[0016] Preferably, the expansion tube fixing seat is provided with a fixing plate connected to the handle housing, and the expansion tube fixing seat is provided with two buckle grooves for fixing the expansion tube. The buckle grooves are L-shaped and the two buckle grooves are symmetrically distributed.

[0017] Preferably, the channel connector includes: Connector body; A handle-type water injection cavity is provided inside the connector body for connecting the water injection pipe; The instrument cavity is disposed within the connector body; A suction cavity is provided within the connector body for connecting the suction intervention tube; The instrument cavity is connected to the suction cavity.

[0018] The present invention also provides a lithotripsy and stone removal device, comprising: the disposable ureteroscope.

[0019] The technical effects and advantages of this invention are as follows: This disposable ureteroscope and lithotripsy device achieves temperature and pressure control by cooperating with the temperature and pressure sensor, the suction intervention channel, and the water injection channel, which greatly reduces the risk of surgery and ensures the safety of patients. Compared with the existing flexible endoscope technology, this application does not require the participation of rigid endoscope and sheath for guidance, and can be directly inserted into the patient's body, reducing the surgical procedure and the difficulty of the surgery. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the disposable ureteroscope of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the handle assembly structure of the present invention; Figure 4 This is a three-dimensional schematic diagram of the head end shell of the present invention; Figure 5 This is a front view of the head end housing of the present invention; Figure 6 This is a side view of the head end housing of the present invention; Figure 7 This is a three-dimensional schematic diagram of the head end of the present invention; Figure 8 This is a front view of the main body of the head end of the present invention; Figure 9 This is a schematic diagram of the channel connector structure of the present invention; Figure 10 This is a schematic diagram of the connection between the channel connector, the water injection pipe, and the suction intervention pipe of the present invention; Figure 11 This is a schematic diagram of the wire drawing turntable of the present invention; Figure 12 This is a three-dimensional schematic diagram of the wire drawing turntable of the present invention; Figure 13 This is a schematic diagram of the direction adjuster of the present invention; Figure 14 This is a three-dimensional schematic diagram of the direction adjuster of the present invention; Figure 15 This is a schematic diagram of the expansion tube of the present invention; Figure 16 This is a three-dimensional schematic diagram of the expansion tube of the present invention; Figure 17 This is a schematic diagram of the jet-shaped vortex at the water inlet of the present invention; Figure 18 This is a schematic diagram of the expansion tube fixing seat structure of the present invention; Figure 19 This is a perspective view of the expansion tube fixing seat of the present invention.

[0021] In the diagram: 100, Insertion assembly; 110, Head end seat; 140, Snake bone; 150, Flexible hose; 111, Head end body; 112, Head end body suction intervention channel; 113A, First head end body water injection channel; 113B, Second head end body water injection channel; 114, First cable channel; 115, Second cable channel; 116, Protrusion; 116A, Cable channel protrusion; 116B, Suction intervention channel protrusion; 120, Head end housing; 121, First mounting hole; 122, Housing suction intervention channel; 123A, First water inlet; 123B, Second water inlet; 123C, Third water inlet; 123D, Fourth water inlet; 124, Second mounting hole; 125, Closure; 200, Handle assembly; 201, Limiting rod; 210 211. Connector body; 212. Connector water injection chamber; 213. Instrument chamber; 214. Suction chamber; 220. Handle housing; 230. Lever; 240. Suction intervention tube; 250. Water injection tube; 260. Direction adjuster; 261. Adjustment knob; 262. Rotary seat; 263. Limiting groove; 270. Wire drawing turntable; 271. Turntable body; 272. Rotation hole; 273. First wire drawing groove; 274. Second wire drawing groove; 275. Adjustment groove; 276. Adjustment block; 280. Expansion tube fixing seat; 281. Fixing plate; 282. Clip groove; 290. Wire drawing; 291. Metal block; 300. Expansion tube; 301. Insertion post; 400. Handle wire assembly. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides, for example Figure 1 The disposable ureteroscope shown is specifically a multi-lumen ureteroscope, which consists of an insertion assembly 100, a handle assembly 200, and a handle cable assembly 400. like Figure 2 As shown, the insertion component 100 includes: a headstock 110, a camera module mounted on the headstock 110, a temperature and pressure sensor mounted on the headstock 110, a snake bone 140 connected to the headstock 110, and a flexible tube 150 connected to the snake bone 140; the camera module is model OVM6946; the camera module integrates a light source, model Maike 0301LED; the light source is an LED lamp. The curved portion of the snake bone 140 is wrapped with a curved portion sheath, and the hose 150 is fitted with a steel wire sleeve. The steel wire sleeve can be connected to the snake bone 140 through a rear connector, or it can be directly laser-welded to the snake bone 140 without using a rear connector; the angle of the curved portion of the snake bone 140 is 270°. The temperature and pressure sensor cable, camera module cable, water injection pipe 250, suction intervention pipe 240, and the wire 290 connected to the snake bone 140 are all housed in the hose 150. The wire 290 is located inside the wire sleeve, which is housed in the hose 150. The temperature and pressure sensor cable and the camera module cable are connected to the adapter plate, which is assembled on the handle assembly 200; like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the head end base 110 includes: a head end body 111 and a head end shell 120 sleeved on the head end body 111. The head end body 111 is provided with a head end body water injection channel and a head end body suction intervention channel 112; the head end body water injection channel includes: a first head end body water injection channel 113A and a second head end body water injection channel 113B; The head end housing 120 is provided with a housing water injection channel and a housing suction intervention channel 122 connected to the head end main body suction intervention channel 112; The shell water injection channel includes four shell water injection channels distributed symmetrically along an axis. The four shell water injection channels are: a first shell water injection channel, a second shell water injection channel, a third shell water injection channel, and a fourth shell water injection channel. The first shell water injection channel, the second shell water injection channel, the third shell water injection channel, and the fourth shell water injection channel extend arcuately out of the surface of the head end shell 120 along the water flow direction to form a first water injection port 123A, a second water injection port 123B, a third water injection port 123C, and a fourth water injection port 123D. The first water injection port 123A, the second water injection port 123B, the third water injection port 123C, and the fourth water injection port 123D are arranged on the side of the head end shell 120. The cross-sectional shape of the first shell water injection channel, the second shell water injection channel, the third shell water injection channel, and the fourth shell water injection channel is rectangular. The water injection channel of the shell extends in an arc along the water flow direction, forming a water injection port on the surface of the head end shell 120 capable of spraying a funnel-shaped vortex, such as... Figure 15As shown, the jet-like vortex of the water inlet carries the lithotripsy from inside the kidney into the suction inlet, improving the lithotripsy suction effect. Since the first housing water inlet channel and the second housing water inlet channel are closer to the first head main body water inlet channel 113A and the second head main body water inlet channel 113B, the water flow near the first mounting hole 121 at the first water inlet 123A and the second water inlet 123B has a greater water flow velocity than that at the third water inlet 123C and the fourth water inlet 123D. The suction intervention channel 112 of the head end body protrudes from the surface of the head end body 111 to form a suction intervention channel protrusion 116B. After the head end body 111 and the head end shell 120 are assembled, the suction intervention channel protrusion 116B and the head end shell 120 form a water injection cavity, and the water injection cavity is connected to the water injection channel of the shell.

[0024] The suction intervention channel 122 of the shell extends away from the suction intervention channel 112 of the head body to form a suction intervention port. The inner wall of the suction intervention port protrudes in the axial direction to form a constriction 125 for blocking the passage of gravel of a set diameter. The constriction 125 prevents larger stones from entering the suction intervention channel and causing blockage.

[0025] The suction inlet is circular in shape, with a sloping end face.

[0026] The head end body 111 is also provided with a first cable channel 114, which is configured to accommodate the camera module cable; The second cable channel 115 is configured to accommodate a temperature and pressure sensor cable.

[0027] The head end housing 120 is provided with a first mounting hole 121 for assembling a camera module and a second mounting hole 124 for assembling a temperature and pressure sensor. The first cable channel 114 and the second cable channel 115 protrude from the surface of the head end body 111 to form a cable channel protrusion 116A. The cable channel protrusion 116A and the suction intervention channel protrusion 116B form a protrusion 116. The protrusion 116 abuts against the mounting portion opened in the head end housing 120 to form a sealing structure for isolating the water injection cavity.

[0028] In this embodiment, the first mounting hole 121 and the suction inlet are both located on the end face away from the snake bone 140. The first water inlet 123A, the second water inlet 123B, the third water inlet 123C, the fourth water inlet 123D, and the second mounting hole 124 are all located on the side of the head end housing 120. The second mounting hole 124 is closer to the snake bone 140 than the first water inlet 123A, the second water inlet 123B, the third water inlet 123C, and the fourth water inlet 123D.

[0029] like Figure 3 As shown, the handle assembly 200 includes: a handle housing 220; Channel connector 210 connected to the handle housing 220; A wire 290 is attached to the snake bone 140 for controlling the bending and positioning of the snake bone 140; A wire drawing turntable 270 is rotatably connected to the handle housing 220 for pulling the wire drawing 290; A lever 230 that controls the rotation of the wire drawing turntable 270; An expansion tube holder 280 is connected to the end of the handle housing 220 for inserting the expansion tube 300; And a direction adjuster 260, with one end connected to the end of the hose 150 and the other end connected to the handle housing 220, for rotating the hose 150 to rotate and position the head end seat 110 along the axis.

[0030] like Figure 11 , Figure 12 The wire drawing turntable 270 shown includes: a turntable body 271 connected to the handle housing 220; A rotating hole 272 is provided in which the turntable body 271 and the handle housing 220 are rotatably connected; At least one wire drawing groove is provided on the turntable body 271; And an adjustment groove 275 for adjusting the length of the wire drawing 290; The adjusting groove 275 includes a plurality of adjusting blocks 276 arranged in a matrix, forming a plurality of adjusting grooves 275 with different lengths relative to the wire drawing groove outlet. The adjusting groove 275 matches the metal block 291 at the end of the wire drawing 290. The metal block and the wire drawing are press-fitted together. The metal block 291 is abutted and glued in the adjusting groove 275. The adjusting groove 275 is provided with 5 settings, and the distance between each setting is 1 mm. The drawing groove is provided in multiple ways, and each drawing groove is at a different distance from the rotating hole 272. In this embodiment, the drawing groove includes a first drawing groove 273 and a second drawing groove 274, wherein the distance between the first drawing groove 273 and the center of the rotating hole 272 is greater than the distance between the second drawing groove 274 and the center of the rotating hole 272. Depending on the specifications of the headstock 110, the drawing wire 290 is assembled into different drawing grooves, thus enabling the same drawing wire 290 and handle assembly 200 to be compatible with different headstocks 110. The adjusting groove 275 allows the traction force of the drawing wire 290 to be maintained within the optimal range, enabling more precise control of the headstock 110. The structural improvements to the headstock 110 allow for rapid insertion into the renal pelvis, accurate location of the stone, reduced patient discomfort and surgical time, and improved flexibility due to its compatibility with different headstocks 110. like Figure 13 , Figure 14 As shown, the direction adjuster 260 includes: a rotating seat 262 connected to the hose 150 and the handle housing 220 respectively, and an adjusting knob 261 fixed on the rotating seat 262 for rotating the rotating seat 262. The end of the rotating seat 262 located inside the handle housing 220 is provided with a limiting groove 263. The limiting groove 263 cooperates with a limiting rod 201 provided on the handle housing 220 to facilitate the positioning of the rotating seat 262. The adjustment direction can be changed from two directions to four directions. By cooperating with the lever 230, the two directions of the snake bone 140 can be changed to four directions by rotating 90 degrees. During surgery, the direction adjuster 260 can change the direction of the head end seat 110 so that the suction intervention port faces different directions, thereby better suctioning the broken stones out of the body. like Figure 18 , Figure 19 As shown, the expansion tube fixing seat 280 is provided with a fixing plate 281 connected to the handle housing 220. The expansion tube fixing seat 280 is provided with two buckle grooves 282 for fixing the expansion tube 300. The buckle grooves 282 are L-shaped and the two buckle grooves 282 are symmetrically distributed.

[0031] like Figure 9 , Figure 10 As shown, the channel connector 210 includes: Connector body 211; A water injection cavity 212 is provided inside the connector body 211 to connect to the water injection pipe 250; An instrument cavity 213 for instrument intervention operations is disposed within the connector body 211; A suction cavity 214 is provided inside the connector body 211 to connect the suction intervention tube 240; The diameter of the input port of the instrument cavity 213 is larger than the diameter of the output port; The diameter of the input port of the suction cavity 214 is smaller than the diameter of the output port.

[0032] The angle formed by the intersection of the axis of the instrument cavity 213 and the axis of the suction cavity 214 is an acute angle or an obtuse angle. The instrument cavity 213 is connected to the suction cavity 214, which is connected to the dilator fixation seat 280 via a pipe. One end of the dilator 300 enters the renal pelvis from the dilator fixation seat 280, and the other end is provided with a locking structure that matches the dilator fixation seat 280. The locking structure includes two inserts 310 that are rotated and locked into the locking slots 282 to fix the end of the dilator. This locking design can better fix the dilator 300, and it can smoothly enter the renal pelvis without a rigid endoscope during the operation. The dilator replaces the rigid endoscope. The dilator has a semi-flexible and semi-rigid characteristic, which can be bent at a large angle but not at a small angle. The dilator passes through the snake bone and extends out of the head seat 110. The snake bone is originally curved, but it becomes rigid after the dilator is inserted into the snake bone. The head of the dilator is used to lift the ureter, and the inside of the ureter can be seen through the camera module.

[0033] like Figure 15 , Figure 16 As shown, the tubing 150 of the insertion component 100 is equipped with a water injection tube 250 and a suction intervention tube 240. Compared with the traditional ureteroscope, the suction intervention tube 240 has a built-in dilation tube 300, and the tubing 150 has multiple tubes inside, with a compact internal space and is not easy to bend. The water inflow and outflow of the water injection channel are controlled based on the temperature and pressure data obtained by the temperature and pressure sensor.

[0034] The temperature and pressure sensor is a pressure sensor or an instrument that can acquire temperature and pressure. Compared with traditional ureteroscopes, the temperature and pressure sensor equipped on the headstock 110 can monitor the patient's temperature and pressure in real time, greatly improving the patient's surgical safety. Ureteroscopy allows for direct insertion through the urethra, bladder, and ureteral orifice, eliminating the need for traditional flexible ureteroscopy, which requires locating the ureteral orifice with a rigid endoscope and guiding the endoscope through a sheath and guide wire. Compared to existing flexible ureteroscopy procedures, this method directly inserts the ureteroscope through the ureter, bladder, and ureteral orifice for laser lithotripsy. The fragments are then aspirated and expelled through a suction port. After stone removal, a guide wire is inserted through the suction port, the ureteroscope is withdrawn, and then pushed back in along the guide wire using a pusher. The procedure is then completed. Furthermore, compared to traditional flexible ureteroscopes, this method features a temperature and pressure sensor and camera module at the tip for real-time video monitoring and temperature and pressure measurement, allowing for the detection of the patient's internal environment. Real-time video transmission and temperature and pressure measurement are implemented. When the patient's internal pressure or temperature is abnormal, temperature and pressure control can be achieved through the coordinated operation of the water inlet and suction intervention port. The principle is as follows: when the patient's internal pressure is high, the suction intervention tube 240 can increase the suction volume to reduce the pressure; when the patient's internal pressure is too low, the water inlet tube 250 can increase the water inflow to increase the pressure and maintain normal internal pressure. Similarly, when the patient's internal temperature is too high, the inflow and outflow of water can be increased simultaneously to cool the patient by carrying away the heat. The temperature and pressure sensors work together with the suction intervention channel and the water inlet channel to achieve temperature and pressure control, greatly reducing the risk of surgery and ensuring patient safety. Compared with existing flexible endoscopy techniques, this application does not require the use of rigid endoscopes and sheaths for guidance, allowing direct entry into the patient's body and reducing the surgical procedure and difficulty.

[0035] The present invention also provides a stone crushing and discharging device, comprising: monitor; Laser lithotripter; Disposable ureteral lithotripsy and stone removal system; And a disposable ureteroscope connected to the disposable ureteral lithotripsy and stone removal system via a handle wire assembly 400.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A single-use ureteroscope, characterized by: The utility model relates to a medical device, including: Insertion assembly (100), including: head end seat (110), camera module assembled in head end seat (110), temperature and pressure sensor assembled in head end seat (110), with head end seat (110) is connected with the snake bone (140), with the snake bone (140) is connected with the hose (150); The head end seat (110) has at least two channels; One channel is configured as a water injection channel, and the other channel is configured as a suction intervention channel; Handle assembly (200) connected with the insertion assembly (100); Wherein, based on the temperature and pressure data obtained by the temperature and pressure sensor, the water inflow of the water injection channel is controlled.

2. A single-use ureteroscope according to claim 1, characterized in that: The head end seat (110) includes a head end body (111) and a head end shell (120) sleeved on the head end body (111): The head end body (111) is provided with a head end body water injection channel and a head end body suction intervention channel (112); The head end shell (120) is provided with a shell water injection channel and a shell suction intervention channel (122) connected with the head end body suction intervention channel (112); The shell water injection channel extends out of the surface of the head end shell (120) in the water flow direction with an arc to form a water injection port in the shape of a jet horn mouth.

3. A single-use ureteroscope according to claim 2, characterized in that: The head end body suction intervention channel (112) protrudes from the surface of the head end body (111) to form a suction intervention channel protruding part (116B), and after the head end body (111) is assembled with the head end shell (120), the suction intervention channel protruding part (116B) and the head end shell (120) form a water injection cavity connected with the shell water injection channel.

4. The disposable ureteroscope of claim 2, wherein: The shell suction intervention channel (122) extends away from the head end body suction intervention channel (112) to form a suction intervention port, and the inner wall of the suction intervention port protrudes towards the axis to form a closing opening (125) for blocking stones with a certain diameter.

5. The single-use ureteroscope of any of claims 2-4, wherein: The head end body (111) is also provided with a first cable channel (114) configured to accommodate a camera module cable; A second cable channel (115) is configured to accommodate a temperature and pressure sensor cable; The first cable channel (114) and the second cable channel (115) protrude from the surface of the head end body (111) to form a cable channel protruding part (116A), and the cable channel protruding part (116A) and the suction intervention channel protruding part (116B) form a protruding part (116), and the protruding part (116) and the mounting part of the head end shell (120) form a sealing structure of the isolated water injection cavity.

6. A single-use ureteroscope according to claim 2 or 3, characterized in that: There are four water injection ports arranged on the side surface of the head end shell (120).

7. The disposable ureteroscope of claim 1, wherein: The handle assembly (200) includes a handle shell (220); A channel joint (210) connected with the handle shell (220); A pull wire (290) connected to the snake bone (140) for controlling the bending and positioning of the snake bone (140); A wire pulling disc (270) connected to the handle shell (220) for pulling the wire (290); A lever (230) for controlling the rotation of the wire pulling disc (270); An expansion tube fixing seat (280) connected to the end of the handle shell (220) for inserting the expansion tube (300); And a direction adjuster (260) for rotating the hose (150) to rotate and position the head end seat (110) along the axis; Wherein, the expansion tube fixing seat (280) is provided with a fixing plate (281) connected with the handle shell (220), and the expansion tube fixing seat (280) is provided with two buckle grooves (282) for fixing the expansion tube (300).

8. A single-use ureteroscope according to claim 7, characterized in that: The wire pulling disc (270) comprises: a disc body (271) connected to the handle shell (220); A rotating hole (272) rotationally connected with the handle shell (220); At least one wire slot provided on the disc body (271); And an adjusting slot (275) for adjusting the length of the wire (290); The direction adjuster (260) comprises: a rotating seat (262) connected with the hose (150) and the handle shell (220) respectively, an adjusting knob (261) fixed on the rotating seat (262) for rotating the rotating seat (262), and a limiting slot (263) provided at the end of the rotating seat (262) away from the hose (150) for positioning the rotating seat (262).

9. A single-use ureteroscope according to claim 7 or 8, characterized in that: The channel connector (210) comprises: a connector main body (211); A connector water injection cavity (212) provided in the connector main body (211) for connecting the water injection pipe (250); An instrument cavity (213) provided in the connector main body (211); An aspiration cavity (214) provided in the connector main body (211) for connecting the aspiration intervention pipe (240); Wherein, the instrument cavity (213) and the aspiration cavity (214) are in communication.

10. A stone crushing and discharging device, characterized in that: It comprises: The ureteroscope of any one of claims 1-9.

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