Stone removal device

Abstract

The stone removal device of this invention includes a removal mechanism, an outer sheath, a handle grip, and a control mechanism. The removal mechanism includes a removal end and a connecting part; the removal end is located at the distal end of the connecting part, and the proximal end of the connecting part is connected to the control mechanism; the removal mechanism is built into the outer sheath; the handle grip is located at the proximal end of the outer sheath. Before entering the cavity, the removal end is built into the outer sheath; after entering the cavity, the control mechanism controls the removal end to enter and unfold within the cavity via the connecting part, thus removing the attached stone. The removal end is made of medical-grade elastic material, which not only has good strength to ensure the removal effect, but also has deformation capability. When the force is too great, it can undergo moderate elastic deformation, preventing accidental damage to surrounding tissues due to excessive force or sharp edges, making clinical use safer.

Description

Technical Field

[0001] This invention relates to a surgical instrument, and more particularly to a stone removal device for use in stone removal surgery. Background Technology

[0002] Patients with rheumatic diseases are prone to developing tophi (gouty tophi) in their joints due to high uric acid levels, leading to severe joint pain. Removing these tophi is necessary to alleviate the pain. Currently, this is usually achieved through endoscopic surgery to surgically remove tophi attached to the articular cartilage, bursa, or surrounding tissues.

[0003] Because gouty tophi typically adhere to articular cartilage, bursae, or surrounding joint tissues with considerable adhesion, the commonly used tool for removal is a curette. The curette's scraping action physically detaches the tophi from the attachment. To ensure effective removal, curettes are usually made of rigid materials and often have sharp edges. Therefore, during the removal process, there is a risk of accidental damage to the articular cartilage, bursae, or surrounding joint tissues to which the tophi are attached.

[0004] Therefore, the purpose of this invention is to develop a safer and non-invasive tophi removal device that can minimize the risk of damage to surrounding tissues while ensuring the removal effect. Summary of the Invention

[0005] The stone removal device of this invention, through its smooth and elastic removal end, ensures the removal effect while employing an elastic material design that allows for slight elastic deformation when excessive force is applied, effectively preventing accidental damage to surrounding tissues caused by excessive force or sharp edges, making it safer for clinical use.

[0006] The stone removal device of the present invention is characterized in that: the stone removal device 100 includes a removal mechanism 1, an outer sheath tube 2, a handle gripping part 3, and a control mechanism 4;

[0007] A. The peeling mechanism 1 includes a peeling end 11 and a connecting part 12; the peeling end 11 is disposed at the distal end of the connecting part 12, and the proximal end of the connecting part 12 is connected to the control mechanism 4.

[0008] B. The peeling mechanism 1 is built into the outer sheath tube 2; the handle grip 3 is located at the proximal end of the outer sheath tube 2;

[0009] C. Before entering the cavity, the peeling end 11 is built into the outer sheath tube 2; after entering the cavity, the control mechanism 4 controls the peeling end 11 to enter the cavity and unfold through the connecting part 12 to peel off the attached stones.

[0010] The unfolded peeling end 11 typically has a smooth, rounded shape, such as an oval, without sharp corners or edges, thus avoiding damage to surrounding tissues during unfolding. The connecting part 12 is usually made of a rigid material, and it does not deform during the process of the control mechanism 4 pushing the peeling end 11 out of the outer sheath 2, providing good delivery force. The unfolded peeling end 11 has sufficient strength to effectively peel away tophi in and around the joint cavity.

[0011] The peeling end 11 is made of a smooth filamentous material.

[0012] The stripping end 11 is made of smooth round wire, smooth flat wire, or smooth shaped wire.

[0013] Smooth filamentous materials, due to their smooth contours, do not damage surrounding tissues while ensuring rigidity and sufficient planing and peeling capabilities.

[0014] The peeling end 11 is made of medical-grade elastic material. This material not only possesses good strength to ensure effective peeling, but also has deformability. This allows the peeling end 11 to be compressed within the outer sheath 2 and then unfolded well upon ejection. Furthermore, due to its elastic deformation capability, it can undergo moderate elastic deformation when excessive force is applied, preventing accidental damage to surrounding tissues caused by excessive force or sharp edges, thus enhancing safety in clinical use.

[0015] The medical elastic material is medical stainless steel, medical shape memory alloy, medical polymer material, or medical composite material. Medical composite materials can typically be manufactured by combining different elastic materials. The applicant has only specifically described the above-mentioned medical elastic materials here. In practical applications, those skilled in the art can select other medical elastic materials for manufacturing as needed. The applicant will not provide specific examples here, but none of them depart from the scope of protection of this application.

[0016] The peeling end 11 is a component that can be preset into different shapes to adapt to different cavity shapes. The peeling end 11 can be preset into various shapes such as circular, elliptical, petal-shaped, polygonal, etc., to adapt to different cavity shape requirements and better peel off gouty tophi in different parts.

[0017] Preferably, the peeling end 11 is made of medical shape memory alloy. When in vitro, the peeling end 11 is compressed and internally placed within the channel of the outer sheath 2. After entering the cavity, under the influence of body temperature, the peeling end 11 automatically unfolds and returns to a pre-set shape, expanding the cavity. When the peeling end 11 is made of shape memory alloy, it can be pre-set to the desired shape through shape memory alloy training. Then, the peeling end 11 is compressed into the channel of the outer sheath 2. After entering the cavity, the peeling end 11 is pushed out via the connecting part 12 using the control mechanism 4. Under the influence of body temperature, the peeling end 11 automatically unfolds and returns to the pre-set shape. This is very convenient to use, and the shape memory alloy has good strength and elasticity, ensuring a good peeling effect while minimizing the risk of accidental tissue damage.

[0018] The shape and size of the dissection end 11 can be adjusted in real time by the control mechanism 4. The control mechanism 4 allows for real-time adjustment of the shape and size of the dissection end 11 as needed during the surgical procedure.

[0019] The control mechanism 4 adjusts the working size of the dissecting end 11 by adjusting the extension length of the dissecting end 11. When the extension length of the dissecting end 11 is small, the shape of the dissecting end 11 entering the body is smaller, and the working length of the dissecting end 11 is correspondingly smaller. When the extension length of the dissecting end 11 is large, the shape of the dissecting end 11 entering the body is correspondingly larger, and the working length of the dissecting end 11 is correspondingly larger. This control method can be achieved with only very simple pushing and pulling actions, making it very convenient to use during surgery.

[0020] The peeling end 11 has a smooth edge. The smooth edge will not cause damage to the tissue during the unfolding of the peeling end 11, and since there is no sharp edge, no local tissue trauma will be caused during the removal of gouty tophi.

[0021] The cross-section of the peeling end 11 is flat. The flat design makes vertical deformation more difficult, thus providing better vertical peeling force.

[0022] The stone removal device 100 also includes a restraint / locking device 5. The restraint / locking device 5 can ensure that the removal mechanism 1 will not be accidentally pushed out when it is compressed and built into the outer sheath 2, and can also lock the working size of the removal end 11 in the working state to prevent the removal end 11 from being retracted under external force, thus preventing the interruption of clinical operation.

[0023] The stone removal device 100 also includes a lighting device 6. The lighting device 6 can provide illumination for the surgical space within the cavity.

[0024] The lighting device 6 includes a light source 61, a control system 62, and a power supply / circuit system 63. The light source 61 is connected to and disconnected from the power supply / circuit system 63 via the control system 62. The control system 62 is equipped with a switch 62-1, which controls the connection and disconnection of the power supply / circuit system 63, thereby turning off the operation of the light source 61.

[0025] The color of the light source 61 can be set to different colors as needed, and the control system 62 enables switching between different colors. The control system 62 is equipped with a color mode control button 62-2, which can be set to different colors as needed, such as green fluorescence, eye-protecting blue light, white, etc., to adapt to different surgical environments.

[0026] The light source 61 is an LED light source and is located at the distal end of the outer sheath 2. When the light source 61 is designed as an LED light source, since LED light sources have the advantage of low heat generation, the LED light source can be directly placed at the distal end of the outer sheath 2 near the cavity of the surgical site to directly illuminate the surgical site.

[0027] The stone removal device 100 also includes an observation device 7.

[0028] The observation device 7 is a camera system 71.

[0029] The camera system 71 includes a lens module 71-1, an illumination module 71-2, a signal processing and transmission module 71-3, and a power supply circuit module 71-4. The images and videos observed by the lens module 71-1 within the light field of the illumination module 71-2 are processed by the signal processing and transmission module 71-3 and then output to the display system 200 for display.

[0030] The peeling end 11 is within the working field of view of the lens module 71-1 of the camera system 71. In clinical use, the peeling end 11 can be used to peel off attached tophi and other substances under direct vision, making clinical use safer and more convenient. The display system 200 is typically a monitor or a high-definition television screen.

[0031] The stone removal device 100 also includes a vibration device 8. The vibration device 8 can vibrate the attached tophi and other objects while removing the stones, and especially when a resonance effect is generated, it can effectively accelerate the loosening and detachment of the attached objects such as tophi.

[0032] The vibration device 8 is an acoustic vibration device 81; the acoustic vibration device 81 includes a vibration source 81-1 and a transducer 81-2. The transducer 81-2 is connected to the proximal end of the connecting part 12. The connecting part 12 is made of rigid material and can transmit the vibration wave generated by the vibration source 81 to the peeling end 11, causing the peeling end 11 to vibrate and treat the attached stones.

[0033] The vibration frequency range of the vibration device 8 is 1000 times / second to 50000 times / second.

[0034] The vibration device 8 is preferably an acoustic vibration device 81. Since the vibration frequency can be adjusted over a wide range, it is very convenient for clinical use. Different vibration frequencies can be selected according to the characteristics of different stones or attachments to achieve good vibration, especially resonance effect.

[0035] In clinical use, the handle grip 3 is held, the outer sheath 2 is inserted into the body, and the control mechanism 4 is pushed forward, causing the connecting part 12 to extend the peeling end 11. Under the action of elastic recovery force or the shape memory function of shape memory alloy, the peeling end 11 unfolds. Then, the constraint / locking device 5 is locked to fix the peeling end 11. Then, by controlling the outer sheath 2, the peeling end 11 can peel off tophi and other attachments. During the operation, the working length of the peeling end 11 can be adjusted in real time according to different surgical sites to ensure that attachments in different sites can be peeled off. After the operation, the constraint / locking device 5 is released, the control mechanism 4 is pulled back, and the peeling end 11 is retracted into the outer sheath 2, thus removing the stone removal device of the present invention from the body.

[0036] The stone removal device of the present invention includes a removal mechanism 1, an outer sheath 2, a handle gripping part 3, and a control mechanism 4. The removal mechanism 1 includes a removal end 11 and a connecting part 12; the removal end 11 is located at the distal end of the connecting part 12, and the proximal end of the connecting part 12 is connected to the control mechanism 4; the removal mechanism 1 is built into the outer sheath 2; the handle gripping part 3 is located at the proximal end of the outer sheath 2. Before entering the cavity, the removal end 11 is built into the outer sheath 2; after entering the cavity, the control mechanism 4 controls the removal end 11 to enter and unfold within the cavity via the connecting part 12, thereby removing the attached stones. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of the stone removal device of the present invention in its recovery state.

[0038] Figure 1-1 yes Figure 1 The main view.

[0039] Figure 1-2 yes Figure 1-1 AA sectional view.

[0040] Figure 1-3 yes Figure 1 Exploded view.

[0041] Figure 2 yes Figure 1 A three-dimensional structural diagram of the fully unfolded peeled-off end.

[0042] Figure 2-1 yes Figure 2 BB cross-sectional view.

[0043] Figure 2-2 yes Figure 2 The main view.

[0044] Figure 2-3 yes Figure 2-2 CC section view.

[0045] Figure 2-4 yes Figure 2-2 DD sectional view.

[0046] Figure 2-5 yes Figure 2 A schematic diagram showing the locking knob in the locked state.

[0047] Figure 2-6 yes Figure 2-5 The main view.

[0048] Figure 2-7 yes Figure 2-6 EE sectional view.

[0049] Figure 2-8 yes Figure 2-6 FF sectional view.

[0050] Figure 2-9 This is a schematic diagram of a three-dimensional structure with irregularly shaped wires pre-formed at the peeling end.

[0051] Figure 2-1 0 is Figure 2-9 GG cross-sectional view.

[0052] Figure 3 This is a schematic diagram of the stone removal device of the present invention, which includes a lighting device.

[0053] Figure 3-1 yes Figure 3 Enlarged view of point H.

[0054] Figure 4 This is a schematic diagram of the stone removal device of the present invention, which includes an observation device.

[0055] Figure 4-1yes Figure 4 Section II.

[0056] Figure 4-2 yes Figure 4-1 Enlarged view of point J.

[0057] Figure 4-3 yes Figure 4 Working principle diagram.

[0058] Figure 5 This is a schematic diagram of the stone removal device of the present invention, which includes a vibration device.

[0059] Figure 5-1 yes Figure 5 KK sectional view.

[0060] Figure 5-2 yes Figure 5-1 Enlarged view of point L.

[0061] Figure 5-3 yes Figure 5 Working principle diagram.

[0062] In the above figure:

[0063] 100 is the stone removal device of the present invention, and 200 is the display system.

[0064] 1 is the peeling mechanism, 2 is the outer sheath, 3 is the handle grip, 4 is the control mechanism, 5 is the restraint / locking device, 6 is the lighting device, 7 is the observation device, and 8 is the vibration device.

[0065] 11 is the stripping end, 12 is the connecting part, and 51 is the locking knob.

[0066] 61 is the light source, 62 is the control system, 63 is the power supply / circuit system, 71 is the camera system, and 81 is the acoustic vibration device.

[0067] 51-1 is the locking surface; 62-1 is the switch; 62-2 is the color mode control button; 71-1 is the lens module; 71-2 is the lighting module; 71-3 is the signal processing and transmission module; 71-4 is the power circuit module; 81-1 is the vibration source; 81-2 is the transducer. Detailed Implementation

[0068] Example 1: Stone Removal Device of the Invention

[0069] refer to Figures 1 to 2-8 The stone removal device in this embodiment includes a removal mechanism 1, an outer sheath tube 2, a handle grip 3, and a control mechanism 4.

[0070] The peeling mechanism 1 includes a peeling end 11 and a connecting part 12; the peeling end 11 is fixedly disposed at the distal end of the connecting part 12 by injection molding, and the proximal end of the connecting part 12 is connected to the control mechanism 4 by injection molding.

[0071] The peeling mechanism 1 is built into the outer sheath tube 2, and the handle grip 3 is located at the proximal end of the outer sheath tube 2.

[0072] The peeling end 11 is made of a smooth filamentous material.

[0073] Smooth filamentous materials, due to their smooth contours, do not damage surrounding tissues while ensuring rigidity and sufficient planing and peeling capabilities.

[0074] refer to Figure 2-1 In this embodiment, the peeling end 11 is made of smooth flat wire with a flat cross-section. The flat design makes vertical deformation more difficult, thus providing better vertical peeling force.

[0075] The peeling end 11 can also be made of shaped wires, such as a serrated design, which can provide better glass properties. (See reference...) Figure 2-1 0.

[0076] The peeling end 11 is made of medical-grade elastic material. This material not only possesses good strength to ensure effective peeling, but also has deformability. This allows the peeling end 11 to be compressed within the outer sheath 2 and then unfolded well upon ejection. Furthermore, due to its elastic deformation capability, it can undergo moderate elastic deformation when excessive force is applied, preventing accidental damage to surrounding tissues caused by excessive force or sharp edges, thus enhancing safety in clinical use.

[0077] The medical elastic material can be medical stainless steel, medical shape memory alloy, medical polymer material, or medical composite material. Medical composite materials are typically made by coating stainless steel or medical shape memory alloy with medical polymer materials such as silicone or TPU. This ensures the support of the peeling end 11 while providing a soft surface, making it more flexible in contact with tissue and less likely to cause accidental tissue damage. The applicant has only specifically described the above-mentioned medical elastic materials. In practical applications, those skilled in the art can select other medical elastic materials as needed for manufacturing. The applicant will not provide specific examples here, but all will fall within the scope of protection of this application.

[0078] In this embodiment, the peeling end 11 is made of medical shape memory alloy. When outside the body, the peeling end 11 is compressed and built into the channel of the outer sheath 2. After entering the cavity, under the action of body temperature, the peeling end 11 automatically unfolds and restores to the preset shape, expanding the cavity. When the peeling end 11 is made of shape memory alloy, it can be preset to the required shape through shape memory alloy training. Then, the peeling end 11 is compressed into the channel of the outer sheath 2. After entering the cavity, the peeling end 11 is pushed out by the control mechanism 4 through the connecting part 12. Under the action of body temperature, the peeling end 11 automatically unfolds and restores to the preset shape. It is very convenient to use, and the shape memory alloy has good support and elasticity, with good expansion effect, while not easily causing accidental damage to tissues.

[0079] refer to Figure 2-9 The peeling end 11 is a component that can be preset into different shapes to adapt to different cavity shapes. The peeling end 11 can be preset into various shapes such as circular, elliptical, petal-shaped, and polygonal to adapt to different cavity shape requirements.

[0080] The shape and size of the dissection end 11 can be adjusted in real time by the control mechanism 4. The control mechanism 4 allows for real-time adjustment of the shape and size of the dissection end 11 as needed during the surgical procedure.

[0081] The connecting part 12 is typically made of a rigid material, and it does not deform during the process of the control mechanism 4 pushing the peeling end 11 out of the outer sheath tube 2, thus having good delivery force.

[0082] In this embodiment, the control mechanism 4 adjusts the working length of the dissecting end 11 by adjusting the extension length of the dissecting end 11. When the extension length of the dissecting end 11 is small, the shape of the dissecting end 11 entering the body is smaller, the working length of the dissecting end 11 is correspondingly smaller, and the dissecting force is increased. When the extension length of the dissecting end 11 is large, the shape of the dissecting end 11 entering the body is correspondingly larger, the working length of the dissecting end 11 is correspondingly larger, and the dissecting force is correspondingly smaller. This control method can be achieved with only very simple pushing and pulling actions, making it very convenient to use during surgery.

[0083] refer to Figures 2 to 2-8The stone removal device 100 also includes a constraint / locking device 5. In this embodiment, the constraint / locking device 5 is a locking knob 51. The locking knob 51 has a shape that matches the driving connecting part 12. When it is in the locked state, the locking surface 51-1 of the locking knob 51 presses against the outer surface of the connecting part 12, the connecting part 12 cannot move, the peeling end 11 is locked, and the peeling operation can be performed. When the locking knob 51 is in the released state, the locking surface 51-1 separates from the outer surface of the connecting part 12, the connecting part 12 can move, and the peeling end 11 can be adjusted or retracted.

[0084] In clinical use, the handle grip 3 is held, the outer sheath 2 is inserted into the body, and the control mechanism 4 is pushed forward, causing the connecting part 12 to extend the peeling end 11. Under the action of elastic recovery force or the shape memory function of shape memory alloy, the peeling end 11 unfolds. Then, the constraint / locking device 5 is locked to fix the peeling end 11. Then, by controlling the outer sheath 2, the peeling end 11 can peel off tophi and other attachments. During the operation, the working length of the peeling end 11 can be adjusted in real time according to different surgical sites to ensure that attachments in different sites can be peeled off. After the operation, the constraint / locking device 5 is released, the control mechanism 4 is pulled back, and the peeling end 11 is retracted into the outer sheath 2, thus removing the stone removal device of the present invention from the body.

[0085] In this embodiment, the unfolded peeling end 11 typically has a smooth, rounded shape, such as an ellipse, without sharp edges, thus avoiding impact on surrounding tissues during the unfolding process. The connecting part 12 is typically made of a rigid material, and will not deform during the process of the control mechanism 4 pushing the peeling end 11 out of the outer sheath 2, providing good delivery force. The unfolded peeling end 11 has sufficient strength to effectively peel away tophi in and around the joint cavity. Moreover, due to its elastic deformation capability, it can undergo moderate elastic deformation when the force is too great, preventing accidental damage to surrounding tissues caused by excessive force or sharp edges, making it safer for clinical use. Example 2: Stone peeling device of the present invention with illumination device

[0086] refer to Figures 2 to 2-4 The difference between this embodiment and embodiment 1 is that in this embodiment, the stone removal device 100 also includes a lighting device 6.

[0087] refer to Figure 2-1The lighting device 6 includes a light source 61, a control system 62, and a power supply / circuit system 63. The light source 61 is connected to and disconnected from the power supply / circuit system 63 via the control system 62. The control system 62 is equipped with a switch 62-1, which controls the connection and disconnection of the power supply / circuit system 63, thereby turning off the operation of the light source 61.

[0088] The color of the light source 61 can be set to different colors as needed, and the control system 62 enables switching between different colors. The control system 62 is equipped with a color mode control button 62-2, which can be set to different colors as needed, such as green fluorescence, eye-protecting blue light, white, etc., to adapt to different surgical environments.

[0089] The light source 61 is an LED light source and is located at the distal end of the outer sheath 2. When the light source 61 is designed as an LED light source, since LED light sources have the advantage of low heat generation, the LED light source can be directly placed at the distal end of the outer sheath 2 near the cavity of the surgical site to directly illuminate the surgical site.

[0090] In this embodiment, the lighting device 6 can provide illumination in clinical applications, and different light sources can be selected as needed, making clinical use more convenient.

[0091] Example 3: Stone removal device of the present invention with observation device

[0092] refer to Figures 2 to 2-4 The difference between this embodiment and embodiment 1 is that in this embodiment, the stone removal device 100 also includes an observation device 7.

[0093] The observation device 7 is a camera system 71.

[0094] The camera system 71 includes a lens module 71-1, an illumination module 71-2, a signal processing and transmission module 71-3, and a power supply circuit module 71-4. The images and videos observed by the lens module 71-1 within the light field of the illumination module 71-2 are processed by the signal processing and transmission module 71-3 and then output to the display system 200 for display. The display system 200 is typically a monitor or a high-definition television screen.

[0095] The peeling end 11 is within the working field of view of the lens module 71-1 of the camera system 71. In clinical use, the peeling end 11 can be used to peel off attached tophi and other substances under direct vision, making clinical use safer and more convenient.

[0096] Example 4: Stone removal device of the present invention with vibration device

[0097] refer to Figures 2 to 2-4 The difference between this embodiment and embodiment 1 is that in this embodiment, the stone removal device 100 also includes a vibration device 8.

[0098] In this embodiment, the vibration device 8 is an acoustic vibration device 81; the acoustic vibration device 81 includes a vibration source 81-1 and a transducer 81-2. The transducer 81-2 is connected to the proximal end of the connecting part 12. The connecting part 12 is made of a rigid material and can transmit the vibration wave generated by the vibration source 81 to the peeling end 11, causing the peeling end 11 to vibrate and treat the attached stones.

[0099] The vibration frequency range of the vibration device 8 is 1000 times / second to 50000 times / second.

[0100] The vibration device 8 is preferably an acoustic vibration device 81. Since the vibration frequency can be adjusted over a wide range, it is very convenient for clinical use. Different vibration frequencies can be selected according to the characteristics of different stones or attachments to achieve good vibration, especially resonance effect.

[0101] In this embodiment, since the vibration device 8 can vibrate the attached tophi and other objects while peeling them off, especially when a resonance effect is generated, it can effectively accelerate the loosening and detachment of the attached objects such as tophi, resulting in a better peeling effect in clinical use.

[0102] It should be noted that the structures disclosed and described herein can be replaced by other structures with the same effect, and the embodiments described herein are not the only structures for implementing the present invention. Although preferred embodiments of the present invention have been described and illustrated herein, those skilled in the art will understand that these embodiments are merely illustrative, and those skilled in the art can make numerous variations, modifications, and substitutions without departing from the present invention. Therefore, the scope of protection of the present invention should be defined in accordance with the spirit and scope of the appended claims.

Claims

1. A stone removal device, characterized in that: The stone removal device (100) includes a removal mechanism (1), an outer sheath (2), a handle grip (3), and a control mechanism (4). A. The peeling mechanism (1) includes a peeling end (11) and a connecting part (12); the peeling end (11) is located at the distal end of the connecting part (12), and the proximal end of the connecting part (12) is connected to the control mechanism (4); the peeling end (11) is made of medical elastic material, and the peeling end (11) has sufficient strength after unfolding to effectively peel the tophi in the joint cavity and surrounding area. Moreover, due to its elastic deformation ability, when the force is too great, it can undergo moderate elastic deformation to prevent accidental damage to surrounding tissues caused by excessive force or sharp edges. B. The peeling mechanism (1) is built into the outer sheath (2); the handle grip (3) is located at the proximal end of the outer sheath (2); the peeling end (11) is annular after unfolding and has no sharp edges. The shape and size of the peeling end (11) are adjusted in real time by the control mechanism (4); when the extension length of the peeling end (11) is small, the shape of the peeling end (11) entering the body is smaller, the working length of the peeling end (11) is correspondingly smaller, and the peeling force is increased; when the extension length of the peeling end (11) is large, the shape of the peeling end (11) entering the body is correspondingly larger, the working length of the peeling end (11) is correspondingly larger, and the peeling force is correspondingly smaller. C. Before entering the cavity, the peeling end (11) is built into the outer sheath (2); after entering the cavity, the control mechanism (4) controls the peeling end (11) to enter the cavity and unfold through the connecting part (12) to peel off the attached stones.

2. The stone removal device according to claim 1, characterized in that: The peeling end (11) is made of a smooth filamentous material.

3. The stone removal device according to claim 1, characterized in that: The stripping end (11) is made of smooth round wire, smooth flat wire, or smooth shaped wire.

4. The stone removal device according to claim 1, characterized in that: The medical elastic material is medical stainless steel, medical shape memory alloy, medical polymer material, or medical composite material.

5. The stone removal device according to claim 4, characterized in that: The stripping end (11) is a component that can be pre-shaped into different shapes to adapt to different cavity shapes.

6. The stone removal device according to claim 5, characterized in that: The peeling end (11) is made of medical shape memory alloy. When outside the body, the peeling end (11) is compressed and built into the channel of the outer sheath (2). After entering the cavity, under the action of body temperature, the peeling end (11) automatically unfolds and restores to the preset shape to peel off the attached stones.

7. The stone removal device according to claim 1, characterized in that: The control mechanism (4) adjusts the space of the cavity by adjusting the extension length of the peeling end (11).

8. The stone removal device according to claim 1, characterized in that: The stripping end (11) has a smooth edge.

9. The stone removal device according to claim 8, characterized in that: The cross-section of the stripped end (11) is flat.

10. The stone removal device according to claim 1, characterized in that: The stone removal device (100) also includes a restraint / locking device (5).

11. The stone removal device according to claim 1, characterized in that: The stone removal device (100) also includes a lighting device (6).

12. The stone removal device according to claim 11, characterized in that: The lighting device (6) includes a light source (61), a control system (62), and a power supply / circuit system (63); the light source (61) is connected to and disconnected from the power supply / circuit system (63) via the control system (62).

13. The stone removal device according to claim 12, characterized in that: The color of the light source (61) can be set to different colors as needed, and the switching between different colors can be achieved through the control system (62).

14. The stone removal device according to claim 13, characterized in that: The light source (61) is an LED light source, which is located at the far end of the outer sheath (2).

15. The stone removal device according to claim 1, characterized in that: The stone removal device (100) also includes an observation device (7).

16. The stone removal device according to claim 15, characterized in that: The observation device (7) is a camera system (71).

17. The stone removal device according to claim 16, characterized in that: The camera system (71) includes a lens module (71-1), an illumination module (71-2), a signal processing and transmission module (71-3), and a power supply circuit module (71-4). The images and videos observed by the lens module (71-1) within the light field of the illumination module (71-2) are processed by the signal processing and transmission module (71-3) and then output to the display system (200) for display.

18. The stone removal device according to claim 1, characterized in that: The stone removal device (100) also includes a vibration device (8).

19. The stone removal device according to claim 18, characterized in that: The vibration device (8) is an acoustic vibration device (81); the acoustic vibration device (81) includes a vibration source (81-1) and a transducer (81-2). The transducer (81-2) is connected to the proximal end of the connecting part (12). The connecting part (12) is made of rigid material and can transmit the vibration wave generated by the vibration source (81) to the peeling end (11), causing the peeling end (11) to vibrate and treat the attached stones.

20. The stone removal device according to claim 18, characterized in that: The vibration frequency range of the vibration device (8) is 1000 times / second to 50000 times / second.

Images