Ureteral stent positioning device

Abstract

The application relates to the technical field of medical devices and discloses a ureteral stent positioning device, which comprises a ureteroscope, the ureteroscope comprises a holding part, a doctor holds the holding part with both hands during use, one end of the holding part is fixedly provided with an insertion part for insertion, observation and positioning, and the insertion part is an elongated pipeline. By arranging a rotating part, the doctor can adjust the angle of the insertion part by using the operation part and push the guide wire into the human body by the thumb while holding the ureteroscope with one hand, so that the convenience of ureteral stent placement surgery is improved, the number of doctors during the surgery can be reduced, the guide wheel one can rotate in one direction when the guide wire is pushed, the situation that the guide wire is pulled out of the insertion part due to the self weight is avoided, the doctor can also adjust the clamping force of the guide wheel one and the guide wheel two on the guide wire in real time through the ring, the situation that the guide wire is blocked is coped with in this way, and the convenience of one-handed operation of the doctor is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a ureteral stent positioning device. Background Technology

[0002] A ureteral stent is a medical catheter primarily used to support the ureter, maintain its patency, and facilitate urine drainage. By maintaining ureteral structural stability, it helps urine flow smoothly from the kidneys to the bladder, preventing complications caused by obstruction, inflammation, or surgical trauma. It is an important auxiliary tool in urological treatment. During ureteral placement surgery, the ureter is typically positioned first using a ureteroscope. Then, a guidewire is inserted through the ureteroscope's insertion port until it reaches the renal pelvis. The ureteral stent is then placed over the guidewire and pushed into the ureter along the guidewire.

[0003] In existing technologies, when controlling a ureteroscope, the attending physician needs to use one hand to control the operating part and the other hand to control the insertion part. Therefore, the insertion of the guidewire requires another physician, which causes some inconvenience. On the one hand, if the guidewire encounters an obstruction in the ureter, two physicians need to work together to change its direction, which affects the efficiency of the operation. On the other hand, the number of physicians who can perform the operation is limited, and the number of clinicians in a single operation should be reduced as much as possible. Therefore, there is an urgent need for a device that allows physicians to operate it with one hand to assist them in inserting the guidewire into the human body. Summary of the Invention

[0004] In view of the problem that the guide wire needs to be inserted into the ureter during ureteral stent placement surgery, a ureteral stent positioning device is proposed.

[0005] The purpose is to improve surgical efficiency and save medical resources by fixing an auxiliary mechanism to the outside of the ureteroscope, so that doctors can operate the ureteroscope with one hand while inserting the guide wire into the body.

[0006] The technical solution of the present invention is a ureteral stent positioning device, including a ureteroscope. The ureteroscope includes a gripping part, one end of which is fixedly provided with an insertion part for insertion, exploration and positioning. The end of the gripping part away from the insertion part is rotatably provided with an operating part for changing the angle of the front end of the insertion part. The side of the gripping part is fixedly provided with an instrument placement port for placing a guide wire and a ureteral stent. It also includes an auxiliary mechanism provided on the side of the gripping part for assisting the doctor in inserting the guide wire into the insertion part.

[0007] The auxiliary mechanism includes an installation component disposed on the side of the grip portion and used to connect the ureteroscope and the auxiliary mechanism, an arc-shaped plate disposed directly above the installation component, a positioning tube fixedly disposed on the side of the arc-shaped plate away from the ureteroscope, a guide component disposed at one end of the positioning tube and used to guide the guidewire end towards the guide, and a rotating component disposed on the side of the arc-shaped plate away from the guide component and used to force the guidewire into the insertion portion.

[0008] The bottom of the arc-shaped plate, away from the instrument insertion port, is provided with a support member for supporting the arc-shaped plate.

[0009] Furthermore, the mounting component includes a fixed plate fixedly disposed on the bottom of the arc-shaped plate near the instrument insertion port, a rotating frame rotatably disposed on the side of the fixed plate, a squeeze rubber fixedly disposed on the side of the rotating frame, an elastic sheet fixedly disposed on the side of the rotating frame away from the fixed plate, a gripping rod fixedly disposed on the side of the elastic sheet away from the rotating frame, and a pad fixedly disposed on the side of the gripping rod near the gripping part. The mounting component also includes a curved rotating plate rotatably disposed on the side of the fixed plate, and an arc-shaped clamping plate is fixedly disposed at the bottom of the curved rotating plate.

[0010] Furthermore, a pair of extruded rubbers are symmetrically arranged on both sides of the rotating frame, the elastic sheet is made of metal and is elastic, a pair of curved rotating plates are symmetrically arranged on both sides of the fixed plate, and the curved rotating plates are located directly below the rotating frame.

[0011] Furthermore, the guide includes an elastic connecting frame sleeved and fixedly disposed on the end of the positioning tube near the instrument insertion inlet, a guide tube fixedly disposed on the inner wall of the end of the elastic connecting frame away from the positioning tube, a sliding frame fixedly disposed on the side of the arc-shaped plate and located outside the guide tube, a stop plate slidably disposed on the inner wall of the sliding frame, and an adjusting screw rotatably disposed on the side of the stop plate away from the guide tube.

[0012] Furthermore, the elastic connecting frame is made of metal and is elastic, and the end of the adjusting screw away from the abutment passes through the top of the sliding frame and is threadedly connected to the sliding frame.

[0013] Furthermore, the rotating component includes a fixed frame fixedly mounted on the side of the arc-shaped plate away from the instrument insertion inlet, a guide wheel one and a guide wheel two rotatably mounted on the side of the fixed frame, a protective shell fixedly mounted on the side of the fixed frame away from the guide wheel one, a rotating wheel rotatably mounted on the side of the protective shell away from the guide wheel one, a transmission belt with its two ends respectively sleeved on the rotating side of the rotating wheel and the rotating shaft side of the guide wheel one, and a ratchet mechanism mounted on the rotating shaft side of the guide wheel one.

[0014] Furthermore, the sides of the first guide wheel and the second guide wheel are provided with a certain gap for clamping the guide wire and the ureteral stent. The ratchet teeth and the check structure of the ratchet mechanism are provided on the side of the rotating shaft of the first guide wheel. The ratchet part of the ratchet mechanism is fixedly provided on the inner wall of the protective shell. The ratchet teeth of the ratchet part are located on the inner wall of the ratchet and mesh with the ratchet teeth.

[0015] Furthermore, the rotating component also includes a sliding groove on the side of the fixed plate, a telescopic rod rotatably disposed on the side of the second guide wheel shaft, a baffle rotatably disposed on the side of the first guide wheel shaft, a fixed cylinder fixedly disposed on the side of the baffle, a winding column fixedly disposed on the side of the telescopic rod, a pull rope wound on the side of the winding column, and a finger ring fixedly disposed on the end of the pull rope away from the winding column.

[0016] Furthermore, a limiting rod is fixedly installed on the inner wall of the sliding groove. The limiting rod passes through the second rotating shaft of the guide wheel. The second rotating shaft of the guide wheel is slidably installed on the inner wall of the sliding groove through the limiting rod. The telescopic rod is slidably installed on the inner wall of the fixed cylinder. A spring is abutting between the end of the telescopic rod and the inner bottom wall of the fixed cylinder.

[0017] Furthermore, the support includes a connecting rod fixedly disposed at the bottom of the arc-shaped plate, and a support cylinder sleeved and threadedly connected to the side of the connecting rod, with the end of the support cylinder away from the connecting rod abutting against the surface of the ureteroscope.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting up the mounting components, the auxiliary mechanism can be fixedly clamped to the side of the ureteroscope via the arc-shaped clamp. The auxiliary mechanism can be connected to ureteroscopes of different sizes and models. In the mounting components, the extrusion rubber can adapt to different angles between the curved rotating plate and the fixed plate, thereby improving the adaptability of the mounting components. When the rotation angle of the rotating frame is limited, the elastic plate uses its own elasticity to provide extra rotation space for the grip, so that the grip can abut against the surface of the ureteroscope. This not only improves the adaptability of the mounting components but also ensures the grip feel of the grip.

[0020] 2. By setting up a guide, when dealing with instrument insertion ports of different heights, doctors can use the adjusting screw to adjust the angle of the guide tube, so that its opening can approach the instrument insertion port of different heights. This ensures that the guide wire can be smoothly inserted into the instrument insertion port and increases the adaptability of the auxiliary mechanism. With the installation parts, the auxiliary mechanism can be detachably connected to ureteroscopes of different models and sizes.

[0021] 3. By incorporating a rotating mechanism, the surgeon can simultaneously adjust the angle of the insertion section using the operating part and push the guidewire into the body with their thumb while holding the ureteroscope with one hand. This increases the convenience of ureteral stent placement surgery and reduces the number of surgeons required. Furthermore, when pushing the guidewire, guide wheel one can rotate in one direction to prevent the guidewire from being pulled out of the insertion section by its own weight. The surgeon can also adjust the clamping force of guide wheels one and two on the guidewire in real time using a finger ring to deal with guidewire obstruction and improve the convenience of one-handed operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the ureteral stent positioning device of the present invention;

[0023] Figure 2 This is a schematic diagram showing the positional relationship between the auxiliary mechanism of the present invention and the ureteroscope;

[0024] Figure 3 This is a schematic diagram of the auxiliary mechanism of the present invention;

[0025] Figure 4 For the present invention Figure 3 A magnified structural diagram of A in the middle;

[0026] Figure 5 For the present invention Figure 3 A magnified structural diagram of B in the diagram;

[0027] Figure 6 This is a schematic diagram of the rotating component of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the protective shell of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the support component of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the winding column of the present invention.

[0031] In the diagram: 1. Ureteroscope; 11. Holding part; 12. Insertion part; 13. Operating part; 14. Instrument placement port; 2. Auxiliary mechanism; 21. Mounting component; 211. Fixing plate; 212. Rotating frame; 213. Extrusion rubber; 214. Elastic sheet; 215. Handle; 216. Pad; 217. Curved rotating plate; 218. Arc-shaped clamp; 22. Arc-shaped plate; 221. Connecting rod; 222. Support 23. Support cylinder; 24. Positioning tube; 25. Guide component; 26. Elastic connecting frame; 27. Guide tube; 28. Sliding frame; 29. ​​Support plate; 20. Adjusting screw; 20. Rotating component; 21. Fixed frame; 22. Guide wheel one; 23. Guide wheel two; 24. Rotating wheel; 255. Transmission belt; 26. Ratchet mechanism; 27. Winding column; 28. Pull rope; 29. ​​Finger ring. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Example 1, referring to Figures 1-2 This is the first embodiment of the present invention, which provides a ureteral stent positioning device, including a ureteroscope 1. The ureteroscope 1 includes a gripping part 11, which is held by the doctor with both hands during use. One end of the gripping part 11 is fixedly provided with an insertion part 12 for insertion, exploration and positioning. The insertion part 12 is a long and thin tube, and a pinhole camera is provided at the end away from the gripping part 11. The end of the gripping part 11 away from the insertion part 12 is rotatably provided with an operating part 13 for changing the angle of the front end of the insertion part 12. An instrument placement port 14 for placing a guide wire and a ureteral stent is fixedly provided on the side of the gripping part 11. The instrument placement port is connected to the insertion part 12. The guide wire enters the insertion part 12 through the instrument placement port. The device also includes an auxiliary mechanism 2 provided on the side of the gripping part 11 to assist the doctor in inserting the guide wire into the insertion part 12.

[0034] Specifically, when using it, the doctor first installs the auxiliary mechanism 2 on the outside of the grip part 11 of the ureteroscope 1, then holds the ureteroscope 1 with one hand and adjusts the insertion part 12 with the other hand. The thumb of the hand holding the ureteroscope 1 can rotate the operating part to change the front angle of the insertion part 12, and can also transport the guide wire into the human body through the auxiliary mechanism 2.

[0035] Reference Figures 3-6The auxiliary mechanism 2 includes a mounting member 21 disposed on the side of the gripping part 11 and used to connect the ureteroscope 1 and the auxiliary mechanism 2; an arc-shaped plate 22 disposed directly above the mounting member 21; one end of the arc-shaped plate 22 is fixed to one side of the gripping part 11 by the mounting member 21, and the other end is abutted against the side of the ureteroscope 1 by a support member; the arc-shaped plate 22 is an arched structure that arches away from the ureteroscope 1; a positioning tube 23 is fixedly disposed on the side of the arc-shaped plate 22 away from the ureteroscope 1; during use, the guidewire is limited by the positioning tube 23; the inner diameter of the positioning tube 23 allows the guidewire and the guidewire fitted with the ureteral stent to pass through; a guide member 24 disposed at one end of the positioning tube 23 and used to guide the end of the guidewire toward the desired direction; a rotating member 25 disposed on the side of the arc-shaped plate 22 away from the guide member 24 and used to force the guidewire into the insertion part 12; and a support member for supporting the arc-shaped plate 22 is disposed at the bottom of the end of the arc-shaped plate 22 away from the instrument insertion port.

[0036] Specifically, before the procedure, the doctor first clamps the guidewire inside the rotating part 25, and then installs the auxiliary mechanism 2 on the side of the holding part 11 through the mounting part 21. The guide part should be located near the instrument insertion port. Then, the guide part is adjusted so that the guidewire can enter the instrument insertion port. After the doctor positions the insertion part 12 in the human body, the guidewire can be slowly pushed into the insertion part 12 through the rotating part 25 and then enter the human body through the insertion part 12. Only one person is needed to complete the operation.

[0037] Example 2, refer to Figures 3-4 This is the second embodiment of the present invention, which differs from the first embodiment in that: the mounting component 21 includes a fixing plate 211 fixedly disposed on the bottom of the arc-shaped plate 22 near the instrument insertion port, a rotating frame 212 rotatably disposed on the side of the fixing plate 211, a compression rubber 213 fixedly disposed on the side of the rotating frame 212, an elastic sheet 214 fixedly disposed on the side of the rotating frame 212 away from the fixing plate 211, a grip bar 215 fixedly disposed on the side of the elastic sheet 214 away from the rotating frame 212, and a pad 216 fixedly disposed on the side of the grip bar 215 near the grip portion 11, the pad 216 being made of rubber. The material has a certain degree of elasticity to increase the feel of the grip 215 when holding it. The mounting part 21 also includes a curved rotating plate 217 rotatably set on the side of the fixed plate 211. An arc-shaped clamp 218 is fixedly set at the bottom of the curved rotating plate 217. A pair of extruded rubbers 213 are set and symmetrically set on both sides of the rotating frame 212. The elastic sheet 214 is made of metal and has elasticity. A pair of curved rotating plates 217 are set and symmetrically set on both sides of the fixed plate 211. An arc-shaped clamp 218 is set at the bottom of each curved rotating plate 217. The curved rotating plate 217 is located directly below the rotating frame 212.

[0038] Specifically, the entire auxiliary mechanism 2 is designed to be detachable from the ureteroscope 1 via the mounting component 21. Before installation, the arc-shaped clamp 218 is clamped on the surface of the grip part 11 near the instrument insertion port (the appropriate position should be such that the thumb can simultaneously contact the operating part 13 and the rotating component 25 and the guide 24 is close to the instrument insertion port). After adjusting the position, the guide wire is fixed to the rotating component 25. The doctor uses the web of his right hand to press against the grip part 11 and uses three fingers other than the thumb and index finger to grip the handle 215. After the handle 215 is gripped, it rotates towards the grip part 11 and drives the rotating frame 212 to rotate towards the curved rotating plate 217. This causes each piece of extrusion rubber 213 to slide into the different curved rotating plates 217 and the fixing plate 211. The curved rotating plate 217 is squeezed and rotates, which drives the arc-shaped clamp 218 to rotate, thereby generating a sufficiently large clamping force on the side of the grip part 11 so that the arc-shaped plate 22 can be fixed on the side of the grip part 11.

[0039] The function of the extrusion rubber 213 is to not only compress the curved rotating plate 217, thus generating sufficient clamping force for the arc-shaped clamp 218, but also to ensure that the clamping angle between the arc-shaped clamp 218 and the curved rotating plate 217 and the fixed plate 211 varies depending on the diameter of the gripping part 11 of the different ureteroscopes 1. Since the extrusion rubber 213 is made of rubber, it is elastic. Even if the clamping between the curved clamp and the fixed plate 211 becomes smaller, the extrusion rubber 213 can still slide between the curved clamp and the fixed plate 211 to complete the clamping and fixing. Therefore, the mounting part 21 can use ureteroscopes 1 with different outer diameters, and the auxiliary mechanism 2 can be connected to different models of ureteroscopes 1, increasing its convenience and applicability.

[0040] The function of the elastic plate is that, for different models of ureteroscope 1, the angle between the curved rotating plate and the fixed plate 211 is different. Therefore, the degree to which the squeeze rubber 213 can be squeezed into the space between the fixed plate 211 and the curved rotating plate 217 is also different. This also makes the rotation angle of the rotating frame 212 different when it is fixed. Through the elastic plate, when the rotating frame 212 is rotated to the limit position, the grip 215 can bypass the restriction of the rotating frame 212 and directly use the elastic force of the elastic plate to obtain enough rotation space to make itself abut against the surface of the grip part 11, thereby increasing the doctor's grip feel.

[0041] Reference Figures 3-5The guide 24 includes an elastic connecting frame 241 sleeved and fixedly installed on the end of the positioning tube 23 near the instrument insertion inlet, and a guide tube 242 fixedly installed on the inner wall of the elastic connecting frame 241 away from the positioning tube 23. The elastic connecting frame 241 is a structure in which two circular metal rings are fixedly connected by an elastic thin plate. The circular metal rings at both ends are fixed to the positioning tube 23 and the guide tube 242 respectively, so the guide tube 242 can swing at one end of the positioning tube 23. A sliding frame 243 is fixedly installed on the side of the arc plate 22 and located outside the guide tube 242. A stop plate 244 is slidably installed on the inner wall of the sliding frame 243. An adjusting screw 245 is rotatably installed on the side of the stop plate 244 away from the guide tube 242. The elastic connecting frame 241 is made of metal and is elastic. The end of the adjusting screw 245 away from the stop plate 244 passes through the top of the sliding frame 243 and is threadedly connected to the sliding frame 243.

[0042] Specifically, for different models of ureteroscopes 1, the height of the instrument insertion port is different. In the guide 24, the doctor passes the guide wire through the positioning tube 23 and the guide tube 242 in advance. Then, according to the position of the instrument insertion port, the doctor rotates the adjusting screw 245 to change the position of the abutment 244. After the abutment 244 moves, it changes the rotation angle of the guide tube 242, so that the opening of the guide tube 242 can be close to the instrument insertion port at different heights, which allows the guide wire to enter the instrument insertion port smoothly.

[0043] Reference Figures 3-9 The rotating component 25 includes a fixed frame 251 fixedly mounted on the side of the arc-shaped plate 22 away from the instrument insertion inlet, guide wheels 252 and 253 rotatably mounted on the side of the fixed frame 251, a protective shell fixedly mounted on the side of the fixed frame 251 away from the guide wheel 252, and a rotating wheel 254 rotatably mounted on the side of the protective shell away from the guide wheel 252. The rotating wheel 254 has a certain distance between its shaft and the guide wheel 252, and its two ends are respectively sleeved on the rotating side of the rotating wheel 254. The transmission belt 255 is located on the side of the shaft of guide wheel 1 252, and the ratchet mechanism 256 is located on the side of the shaft of guide wheel 1 252. The sides of guide wheel 1 252 and guide wheel 2 253 are provided with a certain gap for clamping guide wire and ureteral stent. The ratchet and check structure of ratchet mechanism 256 are provided on the side of the shaft of guide wheel 1 252. The ratchet part of ratchet mechanism 256 is fixedly provided on the inner wall of the protective shell, and the ratchet teeth of the ratchet part are located on the inner wall of the ratchet and mesh with the ratchet teeth.

[0044] Specifically, the gripping wheel is positioned near the operating part 13, allowing the doctor's thumb to rotate both the operating part 13 and the rotating wheel 254. The rotating wheel 254, after rotating, drives the guide wheel 252 to rotate via the transmission belt 255. During use, the guide wheel 252 and guide wheel 253 clamp the guide wire in the middle. Therefore, when the guide wheel 252 rotates, the guide wire is moved by friction between the guide wheel 252 and guide wheel 253, slowly moving towards the insertion part 12. However, due to the ratchet and tooth structure, the guide wheel 252 can only rotate in one direction. The purpose of this design is that, in actual operation, doctors often need to make interactive adjustments between the operating part 13 and the rotating wheel 254, so it is impossible to keep the rotating wheel 254 rotating continuously. Without the ratchet mechanism 256, when most of the guidewire has not entered the human body, the part of the guidewire located outside the body has gravity. This gravity can pull the guidewire that has entered the human body outward. The guide wheel 252 is set to rotate in one direction to prevent the guidewire from being pulled by its own weight when the rotating wheel 254 is not under force.

[0045] The rotating component 25 also includes a sliding groove on the side of the fixed plate 211, a telescopic rod rotatably mounted on the side of the shaft of the second guide wheel 253, a baffle rotatably mounted on the side of the shaft of the first guide wheel 252, a fixed cylinder fixedly mounted on the side of the baffle, a winding column 257 fixedly mounted on the side of the telescopic rod, a pull rope 258 wound on the side of the winding column 257, and a ring 259 fixedly mounted on the end of the pull rope 258 away from the winding column 257. A limit rod is fixedly mounted on the inner wall of the sliding groove. The limit rod passes through the shaft of the second guide wheel 253. The shaft of the second guide wheel 253 is slidably mounted on the inner wall of the sliding groove through the limit rod. The telescopic rod is slidably mounted on the inner wall of the fixed cylinder. A spring abuts between the end of the telescopic rod and the inner bottom wall of the fixed cylinder.

[0046] Specifically, the rotating part 25 can clamp the guide wire. In use, the guide wire is first passed between the first guide wheel 252 and the second guide wheel 253. Then the doctor puts the ring 259 on his right index finger. When holding the grip bar 215, the index finger bends, and the pull rope 258 can naturally move the second guide wheel 253 to one side of the first guide wheel 252 through the winding post 257, so that a clamping force is formed between the first guide wheel 252 and the second guide wheel 253.

[0047] The winding post 257 is used to wind the pull rope 258. The length of the pull rope 258 between the ring 259 and the winding post 257 can be changed by winding different numbers of turns. This is designed so that the guide wheel 1 252 and guide wheel 253 can adapt to medical devices of different diameters such as guide wires and ureteral stents, thereby improving the applicability of the auxiliary mechanism 2.

[0048] Through the ring 259, the doctor can directly control the clamping force between guide wheel 1 252 and guide wheel 253 by pulling the rope 258. When the guidewire slides in the ureter, it may be obstructed by stones or the inner wall structure of the ureter. In this case, the guidewire cannot be moved forcibly. The doctor can reduce the clamping force between guide wheel 1 252 and guide wheel 253 by lifting the index finger, so that the guidewire is pulled back by its own weight. The doctor can then tighten the index finger to clamp the guidewire again. After the guidewire moves back a certain distance, the doctor can adjust the position of the insertion part 12 with the other hand or directly adjust the operation part 13 to adjust the forward position of the guidewire. This way, the doctor can overcome the obstruction and improve the convenience of the doctor's one-handed operation.

[0049] The support includes a connecting rod 221 fixedly disposed at the bottom of the arc plate 22, and a support cylinder 222 sleeved and threadedly connected to the side of the connecting rod 221. The end of the support cylinder 222 away from the connecting rod 221 abuts against the surface of the ureteroscope 1.

[0050] Specifically, to ensure the stability of the arc-shaped plate 22, one end of the arc-shaped plate 22 is fixed near the grip portion 11 by the mounting member 21, while the other end abuts against the surface of the other end of the grip portion 11 by the support member. During use, the support cylinder 222 is rotated until its bottom abuts against the surface of the grip portion 11. Since the bottom of the support cylinder 222 contacts the grip portion 11, the support cylinder 222 can adapt to various different surfaces, thereby increasing the adaptability of the auxiliary mechanism 2. The remaining structure is the same as that of Embodiment 1.

[0051] Based on embodiments 1-3, the working principle of this invention is as follows: The device is based on a ureteroscope 1, and combined with an auxiliary mechanism 2 to achieve guidewire delivery under single-person operation. In use, the doctor first mounts the auxiliary mechanism 2 onto the gripping part 11 of the ureteroscope 1 via the mounting piece 21. Holding the grip lever 215 causes the rotating frame 212 to drive the rubber 213 to compress the curved rotating plate 217. The arc-shaped clamp 218 then clamps the gripping part 11. The guidewire is limited by the positioning tube 23 and precisely inserted into the instrument insertion port via the guide 24. According to the height of the instrument insertion port, rotating the adjusting screw 245 pushes the abutment plate 244, changing the angle of the guide tube 242 connected to the elastic connecting frame 241 to ensure smooth guidewire entry. During guidewire delivery, the doctor's thumb can simultaneously adjust the ureteroscope 1. The operating unit 13 and the rotating component 25, the rotating wheel 254 drive the guide wheel 1 252 via the transmission belt 255, the guide wheel 1 252 and the guide wheel 253 clamp the guide wire, the ratchet and ratchet mechanism 256 prevents the guide wire from retracting due to its own weight, the doctor's index finger is put on the ring 259, when the index finger is bent, the pull rope 258 pulls the guide wheel 253 through the winding column 257, in this way to increase the clamping force between the guide wheel 1 252 and the guide wheel 253, when the guide wire encounters obstruction, the doctor can lift the index finger to reduce the clamping force, let the guide wire move back, adjust and re-clamp and deliver, thereby increasing the convenience of single-handed operation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A ureteral stent positioning device, comprising a ureteroscope (1), the ureteroscope (1) comprising a holding part (11), one end of the holding part (11) being fixedly provided with an insertion part (12) for insertion, viewing and positioning, the end of the holding part (11) away from the insertion part (12) being rotatably provided with an operating part (13) for changing the angle of the front end of the insertion part (12), the side of the holding part (11) being fixedly provided with an instrument placing opening (14) for placing a guide wire and a ureteral stent, characterized in that, It also includes an auxiliary mechanism (2) located on the side of the grip (11) and used to assist the doctor in inserting the guidewire into the insertion part (12). The auxiliary mechanism (2) includes a mounting member (21) disposed on the side of the gripping part (11) and used to connect the ureteroscope (1) and the auxiliary mechanism (2), an arc-shaped plate (22) disposed directly above the mounting member (21), a positioning tube (23) fixedly disposed on the side of the arc-shaped plate (22) away from the ureteroscope (1), a guide member (24) disposed at one end of the positioning tube (23) and used to guide the end of the guidewire towards the guide, and a rotating member (25) disposed on the side of the arc-shaped plate (22) away from the guide member (24) and used to force the guidewire into the insertion part (12). The bottom of the arc-shaped plate (22) away from the instrument inlet is provided with a support member for supporting the arc-shaped plate (22); The rotating component (25) includes a fixed frame (251) fixedly mounted on the side of the arc plate (22) away from the instrument insertion port, a guide wheel 1 (252) and a guide wheel 2 (253) rotatably mounted on the side of the fixed frame (251), a protective shell fixedly mounted on the side of the fixed frame (251) away from the guide wheel 1 (252), a rotating wheel (254) rotatably mounted on the side of the protective shell away from the guide wheel 1 (252), a transmission belt (255) with its two ends respectively sleeved on the rotating side of the rotating wheel (254) and the rotating shaft side of the guide wheel 1 (252), and a ratchet mechanism (256) mounted on the rotating shaft side of the guide wheel 1 (252). The rotating component (25) also includes a sliding groove on the side of the fixed plate (211), a telescopic rod rotatably disposed on the side of the shaft of the second guide wheel (253), a baffle rotatably disposed on the side of the shaft of the first guide wheel (252), a fixed cylinder fixedly disposed on the side of the baffle, a winding column (257) fixedly disposed on the side of the telescopic rod, a pull rope (258) wound on the side of the winding column (257), and a finger ring (259) fixedly disposed on the end of the pull rope (258) away from the winding column (257).

2. A ureteral stent positioning device according to claim 1, wherein: The mounting component (21) includes a fixed plate (211) fixedly disposed on the bottom of the arc plate (22) near the instrument insertion port, a rotating frame (212) rotatably disposed on the side of the fixed plate (211), a squeeze rubber (213) fixedly disposed on the side of the rotating frame (212), an elastic sheet (214) fixedly disposed on the side of the rotating frame (212) away from the fixed plate (211), a grip bar (215) fixedly disposed on the side of the elastic sheet (214) away from the rotating frame (212), and a pad (216) fixedly disposed on the side of the grip bar (215) near the grip part (11). The mounting component (21) also includes a curved rotating plate (217) rotatably disposed on the side of the fixed plate (211), and an arc-shaped clamping plate (218) is fixedly disposed at the bottom of the curved rotating plate (217).

3. A ureteral stent positioning device according to claim 2, wherein: The extruded rubber (213) is provided in a pair and symmetrically arranged on both sides of the rotating frame (212). The elastic sheet (214) is made of metal and has elasticity. The curved rotating plate (217) is provided in a pair and symmetrically arranged on both sides of the fixed plate (211). The curved rotating plate (217) is located directly below the rotating frame (212).

4. The ureteral stent positioning device according to claim 1, characterized in that: The guide (24) includes an elastic connecting frame (241) sleeved and fixedly installed on the end of the positioning tube (23) near the instrument insertion port, a guide tube (242) fixedly installed on the inner wall of the end of the elastic connecting frame (241) away from the positioning tube (23), a sliding frame (243) fixedly installed on the side of the arc plate (22) and located outside the guide tube (242), a stop plate (244) slidably installed on the inner wall of the sliding frame (243), and an adjusting screw (245) rotatably installed on the side of the stop plate (244) away from the guide tube (242).

5. A ureteral stent positioning device according to claim 4, characterized in that: The elastic connecting frame (241) is made of metal and is elastic. The end of the adjusting screw (245) away from the abutment (244) passes through the top of the sliding frame (243) and is threadedly connected to the sliding frame (243).

6. The ureteral stent positioning device according to claim 1, characterized in that: The guide wheel one (252) and guide wheel two (253) have a certain gap on their sides for clamping the guide wire and ureteral stent. The ratchet teeth and check structure of the ratchet mechanism (256) are provided on the side of the rotating shaft of the guide wheel one (252). The ratchet part of the ratchet mechanism (256) is fixedly provided on the inner wall of the protective shell. The ratchet teeth of the ratchet part are located on the inner wall of the ratchet and mesh with the ratchet teeth.

7. The ureteral stent positioning device according to claim 1, characterized in that: A limiting rod is fixedly installed on the inner wall of the sliding groove. The limiting rod passes through the rotating shaft of the second guide wheel (253). The rotating shaft of the second guide wheel (253) is slidably installed on the inner wall of the sliding groove through the limiting rod. The telescopic rod is slidably installed on the inner wall of the fixed cylinder. A spring abuts between the end of the telescopic rod and the inner bottom wall of the fixed cylinder.

8. A ureteral stent positioning device according to claim 1, characterized in that: The support includes a connecting rod (221) fixedly disposed at the bottom of the arc plate (22), and a support cylinder (222) sleeved and threadedly connected to the side of the connecting rod (221). The end of the support cylinder (222) away from the connecting rod (221) abuts against the surface of the ureteroscope (1).

Images