A stone removal device capable of avoiding urinary tract damage

Abstract

The present invention discloses a stone removal device capable of avoiding urinary tract damage, characterized in that it comprises: a clamping head, a connecting tube, a holding handle, a connecting line, and a controller; the clamping head is controllably rotatably connected to the end of the connecting tube, the holding handle is fixedly connected to the tail end of the connecting tube, the holding handle is connected to the connecting line, and the connecting line is connected to the controller; the present invention removes stones in a physical form by designing a clamping head that opens and closes to clamp objects, thereby avoiding the use of laser lithotripsy that has a risk of damaging the human urethra; at the same time, the clamping end of the device is provided with a vibration module to help the clamping head loosen the stone on the urethral surface when clamping the stone, thereby avoiding hard tearing and damaging the urethral side wall; the inner side of the clamping head of the device is also provided with a holmium laser optical fiber, and at the same time, the entire clamping head is composed of an arc-shaped clamping handle, so that the stone can be covered in the clamping head during lithotripsy, thereby avoiding damage to the patient's urethra during the laser lithotripsy action.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a stone removal device capable of avoiding urinary tract damage. Background Art

[0002] Urinary tract stones are a general term for stone diseases in various parts of the urinary system. According to the different locations of the stones, they are divided into kidney stones, ureteral stones, bladder stones, and urethral stones. The formation of this disease is closely related to environmental factors, systemic lesions, and urinary system diseases. Its typical clinical manifestations include lumbar and abdominal colic, hematuria, or symptoms of urinary system obstruction and infection such as frequent urination, urgency, and pain. There are many factors that affect the formation of urinary stones, such as the supersaturation of salts in the urine that form stone crystals, the lack of substances that inhibit crystal formation in the urine, and the presence of nuclear matrix, which are all causes of stone formation.

[0003] Urinary tract stones are usually treated with surgery, including the following:

[0004] 1. For small stones lodged in the anterior urethra, the external urethral opening can be enlarged or incised, and the stone can be removed by clamping, hooking or squeezing. Lubricant should be injected before removal to facilitate stone removal.

[0005] 2. If the stone is large and cannot be moved after effort, urethral lithotomy can be performed.

[0006] 3. For posterior urethral stones, it is recommended to use a probe to push the stones back into the bladder and then treat them as bladder stones. You can also use a urethroscopy under direct vision to remove or crush the stones.

[0007] At present, the commonly used method is extracorporeal shock wave lithotripsy in a semi-sitting position, which has good lithotripsy effect, few side effects, and is relatively simple. For surgical lithotripsy and stone removal, holmium laser lithotripsy is currently used more often, but this type of laser lithotripsy has no protective components to cover the urethra, which will cause varying degrees of damage to the patient's urethral surface tissue during the lithotripsy process. The scar left in the urethra after the wound heals will cause urinary tract blockage or even urinary tract obstruction. In order to avoid such problems, a device that can avoid urethral damage and effectively remove stones is needed. Summary of the invention

[0008] In order to solve the above technical problems, the present invention designs a stone removal device that can avoid urinary tract damage. The stone is clamped by a cylindrical clamping end and crushed at the side to protect the patient's urethra from damage. At the same time, it can be used as a grasping claw to grasp the stone by mechanical and physical acquaintance. A vibration module is designed to cooperate with the stone removal, so that the stone can be better separated from the urethral surface to avoid damage to the urethra.

[0009] In order to achieve the technical effect of solving the above technical problems, the present invention is implemented by the following technical solutions: A stone removal device capable of avoiding urinary tract damage, characterized in that it comprises: a clamping head, a connecting tube, a holding handle, a connecting line, and a controller;

[0010] The clamping head is controllably rotatably connected to the end of the connecting tube, the holding handle is fixedly connected to the tail end of the connecting tube, the holding handle is connected to the connecting wire, and the connecting wire is connected to the controller;

[0011] The clamping head comprises a base and an arc-shaped clamping block movably connected to the base and capable of moving and expanding in parallel to both sides, and the expansion distance of the head end of the arc-shaped clamping block is greater than the expansion distance of the tail end, the end of the arc-shaped clamping block is fixedly provided with a tooth claw, and the inner side surface of the end is provided with a vibration module and a holmium laser optical fiber, the inner side surface of the vibration module is fixedly provided with a sharp protrusion, and the base is provided with a camera; the control is provided with a display to receive image information received by the real camera, and the controller is provided with a holmium laser emission module electrically connected to the laser optical fiber; the arc-shaped clamping block is connected with a pull rope, and the pull rope is connected to the holding handle to control the opening and closing of the clamping head; the holmium laser optical fiber and the vibration module are electrically connected to the controller through wires;

[0012] Furthermore, a bearing cylinder extending outward is fixedly provided at the bottom of the base of the arc-shaped clamping block, a driving rod is movably sleeved in the bearing cylinder, a guide block is fixedly provided at the outer periphery, a connecting rod is hingedly connected to the opposite side of the driving rod, the arc-shaped clamping block is slidably connected to the guide block of the bearing cylinder, and the other end of the connecting rod is hingedly connected to the side edge of the arc-shaped clamping block, the pull rope is fixedly connected to the tail end of the driving rod, and a return spring limited to the inner cavity of the bearing cylinder is provided at the tail end of the driving rod;

[0013] Further, the arc-shaped clamping block includes a primary arc block, a secondary arc block hinged to the primary arc block on the outer side surface, and an end arc block hinged to the secondary arc block on the inner side surface, the tooth claw is fixedly arranged on the outer side surface of the end arc block, the vibration module is fixedly arranged on the inner side surface of the end arc block, the holmium laser optical fiber is fixedly arranged on the secondary arc block and the inner side surface of the primary arc block, the primary arc block is movably connected to the counter-position side surface of the bearing cylinder, the head end of the driving rod is counter-positioned and hinged with a guide rod, and the other end of the guide rod is rotatably connected to the bottom of the secondary arc block, the head end side edge of the guide rod is also hinged with a transition rod, and the other end of the transition rod is rotatably connected to the bottom of the end arc block;

[0014] Furthermore, a bearing net is fixedly provided between the inner end faces of the secondary arc block and the end arc block;

[0015] Furthermore, a barbed tooth is fixedly provided on the inner end surface of the tooth claw;

[0016] Furthermore, a stepper motor is fixedly provided at the end of the connecting tube, and a rotating shaft of the stepper motor is fixedly connected to the base of the clamping head; the stepper motor is electrically connected to the controller through a wire;

[0017] Furthermore, the holding handle includes a handle and a trigger hingedly connected to the handle, a driver is fixedly provided at the top of the trigger, and a cylinder is fixedly provided at the top of the driver, and a section of the pull rope not connected to the clamping head passes around the cylinder and is fixedly connected to the side wall of the inner cavity of the handle;

[0018] Furthermore, a control button is fixedly provided on the outer side wall of the handle;

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention clamps the calculus in the urethra by designing a clamping head that opens and closes to clamp objects, and removes the calculus in a physical form. It is used when stone removal is convenient and the calculus is not stubbornly attached, avoiding the use of laser lithotripsy that has a risk of damaging the human urethra. At the same time, the clamping end of the device is provided with a vibration module to help the clamping head loosen the calculus on the urethra surface when clamping the calculus, avoiding hard tearing and damaging the urethra side wall. The inner side of the clamping head of the device is also provided with a holmium laser optical fiber, and laser lithotripsy is performed when encountering stubbornly attached calculi. At the same time, the entire clamping head is composed of an arc-shaped clamping head. When crushing the calculus, the calculus can be wrapped in the clamping head, that is, the clamping head forms an isolation body between the calculus and the urethra, avoiding damage to the patient's urethra during the laser lithotripsy action.

[0021] 2. The controllable rotation of the clamping end of the present invention can, on the one hand, flip the entire clamping head to wrap the stone, and on the other hand, change the body position of the stone clamped, so as to facilitate stable stone clamping. At the same time, a camera is provided on the clamping head of the device, and a display screen is provided to match the camera. In the actual stone removal process, the graphics collected by the camera can be used for visualization operations, thereby improving the success rate of stone removal. At the same time, there is no need to re-insert the image acquisition device, which provides convenience for the entire stone removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of a stone removal device capable of avoiding urinary tract damage;

[0024] Figure 2 It is a schematic cross-sectional view of a stone removal device capable of avoiding urinary tract damage;

[0025] Figure 3 The present invention is a schematic diagram of a clamping head and its accessory structure of a stone removal device capable of avoiding urinary tract damage;

[0026] Figure 4 The present invention is a schematic diagram of a clamping head and its accessory structure of a stone removal device capable of avoiding urinary tract damage;

[0027] Figure 5 It is a schematic diagram of the internal structure of the clamping head of a stone removal device that can avoid urinary tract damage;

[0028] Figure 6 It is a schematic diagram of the internal structure of the clamping head of a stone removal device that can avoid urinary tract damage;

[0029] Figure 7 Yes Figure 1 A partial enlarged schematic diagram of the middle portion 8;

[0030] Figure 8 Yes Figure 2 A partial enlarged schematic diagram of the middle portion 9;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1-clamping head, 11-base, 111-camera, 112-carrying cylinder, 1121-guide block, 1122-rectangular hole, 113-driving rod, 1131-rectangular groove, 12-primary arc block, 13-secondary arc block, 14-end arc block, 141-vibration module, 142-tooth claw, 143-sharp protrusion, 144-barb tooth, 15-carrying net, 16-guide rod, 161-transition rod, 17-pull rope, 18-holmium laser fiber, 19-connecting rod, 2-connecting tube, 21-stepping motor, 3-holding handle, 31-trigger, 311-driver, 32-control button, 33-handle, 4-connecting line, 5-controller, 51-display screen, 6-wire, 7-reset spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figures 1 to 8As shown, a stone removal device capable of avoiding urinary tract damage is characterized in that it comprises: a clamping head 1, a connecting tube 2, a holding handle 3, a connecting line 4, and a controller 5;

[0036] The clamping head 1 is controllably rotatably connected to the end of the connecting tube 2, and the holding handle 3 is fixedly connected to the tail end of the connecting tube 2. The holding handle 3 is connected to the connecting line 4, and the connecting line 4 is connected to the controller 5. The holding handle 3 is held to operate the clamping head 1 to perform the stone removal operation, and the clamping head 1 is controlled by the controller 5.

[0037] The clamping head 1 includes a base 11 and an arc-shaped clamping block movably connected to the base 11 and capable of moving and expanding in parallel to both sides, and the expansion distance of the head end of the arc-shaped clamping block is greater than the expansion distance of the tail end. The arc-shaped design is to provide a protective space to cover the stone in its inner cavity. The end of the arc-shaped clamping block is fixedly provided with a tooth claw 142, and the inner side of the end is provided with a vibration module 141 and a holmium laser optical fiber 18. The claw teeth form a small-area clamping claw at the end of the clamping head 1 to make up for the clumsy clamping of the arc-shaped block. The inner side of the vibration module 141 is fixedly provided with a sharp protrusion, which is used to clamp and transfer the stone to the vibration module 1. 41, this sharp protrusion 143 is nailed into the stone, which improves the stability of the overall clamping of the stone. The base 11 is provided with a camera 111; the control is provided with a display, which receives the image information received by the real camera 111 and performs visual guidance for stone removal. The controller 5 is provided with a holmium laser emission module, which is electrically connected to the holmium laser optical fiber 18 to control the holmium laser optical fiber 18 to emit laser to break the stone; the arc-shaped clamping block is connected to a pull rope 17, and the pull rope 17 is connected to the holding handle 3 to control the opening and closing of the clamping head 1; the holmium laser optical fiber 18 and the vibration module 141 are electrically connected to the controller 5 through the wire 6;

[0038] The bottom of the base 11 of the arc-shaped clamping block is fixedly provided with a bearing cylinder 112 extending outward, a driving rod 113 is movably sleeved in the bearing cylinder 112, and a guide block 1121 is fixedly provided on the outer periphery. The opposing side of the driving rod 113 is hingedly connected with a connecting rod 19. The arc-shaped clamping block is slidably connected to the guide block 1121 of the bearing cylinder 112, and slides outward along the slider to expand to realize the opening and closing of the clamping block. The other end of the connecting rod 19 is hingedly connected to the side edge of the arc-shaped clamping block. When the driving rod 113 is pushed forward, The arc-shaped clamping block is stretched outward by the connecting rod 19 to realize the opening of the clamping head 1. When the driving rod 113 moves backward, the connecting rod 19 is pulled in the same way, and the arc-shaped clamping block is retracted inward by the connecting rod 19 to realize the locking of the clamping head 1. The pull rope 17 is fixedly connected to the tail end of the driving rod 113, and the tail end of the driving rod 113 is provided with a reset spring 7 limited in the inner cavity of the bearing cylinder 112. The reset spring 7 always pushes the driving rod 113 forward, giving the entire clamping head 1 a restoring torque in the open state, so that the clamping head 1 is in a normally open state.

[0039] The arc-shaped clamping block includes a primary arc block 12, a secondary arc block 13 hingedly connected to the primary arc block 12 on the outer side, and an end arc block 14 hingedly connected to the secondary arc block 13 on the inner side, the tooth claw 142 is fixedly arranged on the outer side of the end arc block 14, the vibration module 141 is fixedly arranged on the inner side of the end arc block 14, the holmium laser fiber 18 is fixedly arranged on the inner side of the secondary arc block 13 and the primary arc block 12, the primary arc block 12 is movably connected to the opposing side of the bearing cylinder 112, the head end of the driving rod 113 is hingedly connected to the guide rod 16, and the other end of the guide rod 16 is rotatably connected to the bottom of the secondary arc block 13, the head end side of the guide rod 16 is also hingedly connected to the transition rod 161, and the other end of the transition rod 161 is rotatably connected to the bottom of the end arc block 14; while the driving rod 113 is pushed forward , driving the guide rod 16 to move, the guide rod 16 pushes the secondary arc block 13 outward, that is, at this time, the second arc block is in an open state of outward rotation and expansion; for the end arc block 14, after its hinged point expands outward, if its other section does not move, the overall state presents a tilted open state like the secondary arc block 13, but under the traction of the transition rod 161, the tilted opening angle of the end arc block 14 is smaller than the opening angle of the secondary arc block 13, that is, the final clamping head 1 presents a tilted transition opening and closing of the secondary slider, and the opening and closing amplitude of the end arc block 14 is greater than the opening and closing amplitude of the primary arc block 12, so that the clamping head 1 presents a stepped opening state when it is in operation, and a larger expansion of the end is achieved within a limited expansion range, which can ensure that the entire clamping end is attached to the inner wall of the urethra for stable clamping of larger stones;

[0040] A bearing net 15 is fixed between the inner end faces of the secondary arc block 13 and the end arc block 14. The bearing net 15 is combined with the primary arc block 12, the secondary arc block 13 and the end arc block 14 to form a three-quarter cylindrical bearing end, which is convenient for stably covering and removing the stone.

[0041] The inner end surface of the tooth claw 142 is fixedly provided with a barbed tooth 144, which is convenient for stably clamping and dragging the stone.

[0042] Example 2

[0043] See also Figures 1 to 8 As shown, a stone removal device capable of avoiding urinary tract damage is characterized in that it comprises: a clamping head 1, a connecting tube 2, a holding handle 3, a connecting line 4, and a controller 5;

[0044] The clamping head 1 is controllably rotatably connected to the end of the connecting tube 2, the holding handle 3 is fixedly connected to the tail end of the connecting tube 2, the holding handle 3 is connected to the connecting line 4, and the connecting line 4 is connected to the controller 5;

[0045] The clamping head 1 includes a base 11 and an arc-shaped clamping block movably connected to the base 11 and capable of moving and expanding in parallel to both sides, and the expansion distance of the head end of the arc-shaped clamping block is greater than the expansion distance of the tail end. The end of the arc-shaped clamping block is fixedly provided with a tooth claw 142, and the inner side surface of the end is provided with a vibration module 141 and a holmium laser optical fiber 18. The inner side surface of the vibration module 141 is fixedly provided with a sharp protrusion, and a camera 111 is provided on the base 11; the control is provided with a display to receive image information received by the real camera 111, and a holmium laser emitting module is provided in the controller 5, which is electrically connected to the laser optical fiber; the arc-shaped clamping block is connected with a pull rope 17, and the pull rope 17 is connected to the holding handle 3 to control the opening and closing of the clamping head 1; the holmium laser optical fiber 18 and the vibration module 141 are electrically connected to the controller 5 through the wire 6; the camera 111 is a type with a built-in aperture, which has a lighting effect during the insertion process;

[0046] The end of the connecting tube 2 is fixedly provided with a stepper motor 21, and the rotating shaft of the stepper motor 21 is fixedly connected to the base 11 of the clamping head 1; the stepper motor 21 is electrically connected to the controller 5 through the wire 6; the stepper motor 21 is both a connecting structure and a rotating joint, and the key is to drive the clamping head 1 to rotate and change its clamping direction, such as turning the entire clamping head 1 over to cover the stone in a closed form, laser crushing the stone, and protecting the patient's urine bag from damage by the clamping head 1; or after the claws clamp the stone, a slight left and right rotation movement helps to help the stone better detach from the patient's urethral side wall;

[0047] The holding handle 3 includes a handle 33 and a trigger 31 hingedly connected to the handle 33, a driver 311 is fixedly provided at the top of the trigger 31, and a cylinder is fixedly provided at the top of the driver 311, and a section of the pull rope 17 that is not connected to the clamping head 1 passes around the cylinder and is fixedly connected to the side wall of the inner cavity of the handle 33; when the trigger 31 is pressed, the driver 311 at the end of the trigger 31 drags the pull rope 17, and the pull rope 17 drags the driving rod 113 of the clamping head 1 to realize the opening and closing design of the clamping head 1;

[0048] A control button 32 is fixedly provided on the outer wall of the handle 33 to control the rotation, vibration and laser crushing of the clamping head 1 of the device.

[0049] Example 3

[0050] This embodiment is a specific method and process for using a stone removal device that can avoid urinary tract damage based on the above-mentioned embodiments 1 and 2;

[0051] 1. Disinfect and sterilize the holding handle 3, the clamping head 1, and the connecting tube 2 of the device;

[0052] 2. Hold the grip handle 3, press the trigger 31, and insert the clamping head 1 and the connecting tube 2 into the patient's urethra;

[0053] 3. At the same time, the display screen 51 of the controller 5 is turned on to observe the urethra and guide the insertion of the device;

[0054] 4. After the clamping head 1 reaches the stone, release the trigger 31 to fully open the clamping head 1;

[0055] 5. Operate the clamping head 1 to continue entering, first clamp the stone with the claws 142, and explore its attachment to the patient's urethra. If it is relatively loose, directly clamp the stone with the claws 142 and remove it;

[0056] 6. If the attachment is relatively firm, open the clamping head 1 and push the clamping head 1 further to make the vibration module 141 contact the stone, loosen the stone through vibration, and finally clamp the stone out of the body;

[0057] 7. If the stone is still held in place despite the vibration, the clamping head 1 is flipped over by the control button to cover the stone and the stone is broken by the laser;

[0058] 8. After the stones are broken or taken out, the clamping head 1 is opened to the maximum state, and pushed into the urethra in close contact with the side wall of the urine bag. The remaining stones can be shoveled into the clamping head 1 and finally taken out.

[0059] In summary, 1. The present invention clamps the calculus in the urethra by designing a clamping head that opens and closes to clamp objects, and removes the calculus in a physical form. It is used when stone removal is convenient and the calculus is not stubbornly attached, avoiding the use of laser lithotripsy that has a risk of damaging the human urethra. At the same time, the clamping end of the device is provided with a vibration module to help the clamping head loosen the calculus on the urethra surface when clamping the calculus, avoiding hard tearing and damaging the urethra side wall. The inner side of the clamping head of the device is also provided with a holmium laser optical fiber, and laser lithotripsy is performed when encountering stubbornly attached calculi. At the same time, the entire clamping head is composed of an arc-shaped clamping head. When crushing the calculus, the calculus can be wrapped in the clamping head, that is, the clamping head forms an isolation body between the calculus and the urethra, avoiding damage to the patient's urethra during the laser lithotripsy action.

[0060] 2. The controllable rotation of the clamping end of the present invention can, on the one hand, flip the entire clamping head to wrap the stone, and on the other hand, change the body position of the stone clamped, so as to facilitate stable stone clamping. At the same time, a camera is provided on the clamping head of the device, and a display screen is provided to match the camera. In the actual stone removal process, the graphics collected by the camera can be used for visualization operations, thereby improving the success rate of stone removal. At the same time, there is no need to re-insert the image acquisition device, which provides convenience for the entire stone removal process.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A stone removal device capable of avoiding urinary tract damage, characterized in that: include: Clamping head, connecting tube, holding handle, connecting wire, controller; The clamping head is controllably rotatably connected to the end of the connecting tube, the holding handle is fixedly connected to the tail end of the connecting tube, the holding handle is connected to the connecting wire, and the connecting wire is connected to the controller; The clamping head comprises a base and an arc-shaped clamping block movably connected to the base and capable of moving and expanding in parallel to both sides, and the expansion distance of the head end of the arc-shaped clamping block is greater than the expansion distance of the tail end, the end of the arc-shaped clamping block is fixedly provided with a tooth claw, and the inner side surface of the end is provided with a vibration module and a holmium laser optical fiber, the inner side surface of the vibration module is fixedly provided with a sharp protrusion, and the base is provided with a camera; the control is provided with a display to receive image information received by the real camera, and the controller is provided with a holmium laser emission module electrically connected to the laser optical fiber; the arc-shaped clamping block is connected with a pull rope, and the pull rope is connected to the holding handle to control the opening and closing of the clamping head; the holmium laser optical fiber and the vibration module are electrically connected to the controller through wires; The bottom of the base of the arc-shaped clamping block is fixedly provided with a bearing cylinder extending outward, a driving rod is movably sleeved in the bearing cylinder, a guide block is fixedly provided at the outer periphery, a connecting rod is hingedly connected to the opposite side of the driving rod, the arc-shaped clamping block is slidably connected to the guide block of the bearing cylinder, and the other end of the connecting rod is hingedly connected to the side edge of the arc-shaped clamping block, the pull rope is fixedly connected to the tail end of the driving rod, and the tail end of the driving rod is provided with a reset spring limited in the inner cavity of the bearing cylinder; The arc-shaped clamping block includes a primary arc block, a secondary arc block hinged to the primary arc block on the outer side surface, and an end arc block hinged to the secondary arc block on the inner side surface, the tooth claw is fixedly arranged on the outer side surface of the end arc block, the vibration module is fixedly arranged on the inner side surface of the end arc block, the holmium laser optical fiber is fixedly arranged on the secondary arc block and the inner side surface of the primary arc block, the primary arc block is movably connected to the counter-position side surface of the bearing cylinder, the head end of the driving rod is counter-positioned and hinged with a guide rod, and the other end of the guide rod is rotatably connected to the bottom of the secondary arc block, the head end side edge of the guide rod is also hinged with a transition rod, and the other end of the transition rod is rotatably connected to the bottom of the end arc block; A bearing net is fixedly provided between the inner end surfaces of the secondary arc block and the end arc block; The inner end surface of the tooth claw is fixedly provided with a barbed tooth.

2. A stone removal device capable of avoiding urinary tract damage according to claim 1, characterized in that: A stepper motor is fixedly arranged at the end of the connecting pipe, and a rotating shaft of the stepper motor is fixedly connected to the base of the clamping head; the stepper motor is electrically connected to the controller through a wire.

3. A stone removal device capable of avoiding urinary tract damage according to claim 1, characterized in that: The holding handle comprises a handle and a trigger hinged on the handle, a driver is fixedly provided on the top of the trigger, and a cylinder is fixedly provided on the top of the driver, and a section of the pull rope not connected to the clamping head passes around the cylinder and is fixedly connected to the side wall of the inner cavity of the handle.

4. A stone removal device capable of avoiding urinary tract damage according to claim 3, characterized in that: A control button is fixedly arranged on the outer side wall of the handle.

Images