A clinical stone extraction device for hepatobiliary surgery

Abstract

The application discloses a clinical calculus removing device for hepatobiliary surgery and relates to the technical field of medical apparatuses, which is characterized in that the technical scheme comprises a core rod, the end of the core rod is provided with a mesh basket wire, the outside of the core rod is provided with a sheath tube, the sheath tube is provided with a sleeve, the sleeve is provided with a calculus removing protection mechanism, a hierarchical linkage mechanism is arranged between the calculus removing protection mechanism and the sheath tube, and the end of the sleeve away from the calculus removing protection mechanism is provided with an operation control mechanism. The hierarchical linkage mechanism is arranged to link the mesh basket wire and the calculus removing protection mechanism, so that the continuous operation of accurate calculus removing first and automatic wrapping later is realized, the calculus is prevented from falling off or remaining in the process of being removed, the operation success rate and safety are remarkably improved, the calculus removing protection mechanism itself can be used as an independent calculus removing forceps, the calculus removing forceps can be separately controlled to grasp the scattered calculus around the mesh basket which is difficult to handle, and the operation difficulty and the patient risk are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a clinical stone removal device for hepatobiliary surgery. Background Technology

[0002] In hepatobiliary surgery, gallstones and hepatobiliary duct stones are common clinical conditions. If stones obstruct the bile duct, they can easily cause serious complications such as obstructive jaundice and cholangitis, requiring minimally invasive surgery to remove them. With the development of endoscopic technology, minimally invasive stone removal has become the preferred option due to its small trauma and rapid recovery. Its core relies on basket-type stone retrieval devices to grasp and remove the stones.

[0003] However, due to the narrow and complex environment of the hepatobiliary ducts and the fragility of stones, during the removal process, stones are very likely to break due to friction and compression with the bile duct wall or fall out of the mesh due to insufficient tightening of the basket, leading to surgical failure, stone residue, and potentially causing serious complications such as inflammation and obstruction, or even requiring a second surgery, increasing the patient's suffering and medical costs.

[0004] Existing technologies have introduced several improvements to stone retrieval procedures, including adding a fixed or sliding protective sleeve to the outside of the basket to shield the stone during retrieval. However, these protective sleeves are usually single-function, providing only limited protection and failing to completely enclose the stone, offering poor protection against small, fragmented stones. Another approach is to design more complex multi-claw protective mechanisms, but these mechanisms are often disconnected from the stone retrieval process, requiring additional, independent procedures from medical personnel, increasing the complexity and difficulty of the surgery.

[0005] The existing hepatobiliary stone removal devices still have the following problems: (1) Poor anti-drop effect: The existing protective structure cannot form a complete and reliable wrap around the captured stones, and there is still a risk of the stones falling off or remaining in the removal path; (2) Single function: The device lacks the ability to completely remove stones in a single operation and cannot effectively handle scattered stones other than the main target of the basket; (3) Cumbersome operation: The stone removal action and the protective action need to be carried out step by step or are difficult to coordinate, which increases the operational burden of medical staff and the operation time, and is prone to failure due to improper operation.

[0006] Therefore, the present invention aims to provide a clinical stone removal device for hepatobiliary surgery to solve the above-mentioned problems. Summary of the Invention

[0007] The purpose of this invention is to provide a clinical stone retrieval device for hepatobiliary surgery. This invention, through a graded linkage mechanism, links the stone retrieval basket with a protective mechanism consisting of three arc-shaped grippers, achieving a continuous operation of precise stone retrieval followed by automatic encapsulation. This greatly prevents stones from falling out or remaining during the removal process, significantly improving the success rate and safety of the surgery. Simultaneously, the stone retrieval protective mechanism itself can be used as an independent stone retrieval forceps, independently operable to grasp scattered stones around the periphery that are difficult to handle by the basket. The overall structure of the device is compact, and its clear force feedback and locking mechanism ensure precise and labor-saving operation, effectively reducing the difficulty of surgery and patient risk, providing more comprehensive and efficient instrumental support for minimally invasive hepatobiliary surgery.

[0008] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a clinical stone removal device for hepatobiliary surgery, comprising a core rod, a mesh wire at the end of the core rod, a sheath tube outside the core rod, a sleeve on the sheath tube, a stone removal protection mechanism on the sleeve, the stone removal protection mechanism being used to prevent stones from falling during the stone removal process, a graded linkage mechanism being provided between the stone removal protection mechanism and the sheath tube, the graded linkage mechanism being used to first control the mesh wire to remove stones, and then control the stone removal protection mechanism to protect the mesh wire during the stone removal operation, an operation control mechanism being provided at the end of the sleeve away from the stone removal protection mechanism, the operation control mechanism being used to control the operation of the graded linkage mechanism.

[0009] By adopting the above technical solution, the stone retrieval process performed by the basket wire and the protection process performed by the stone retrieval protection mechanism are integrated into a continuous and automated operation process through a hierarchical linkage mechanism. The operator only needs to control the action of the single operation control mechanism to first accurately control the basket to grab the stone, and then automatically trigger the stone retrieval protection mechanism to wrap the entire basket wire. This effectively prevents the stone from falling off or remaining due to loosening, breaking, or scraping against tissue during the retrieval path, which greatly improves the success rate and safety of stone retrieval surgery, avoids complications such as inflammation and obstruction caused by secondary stone retrieval surgery or stone residue, reduces the patient's treatment risk and medical costs, and simplifies the operation steps for medical staff and reduces the difficulty of the operation.

[0010] The invention is further configured such that: the stone-retrieving protection mechanism includes multiple arc-shaped grippers and multiple support rods corresponding to the number of arc-shaped grippers; the multiple arc-shaped grippers are all hinged to the sleeve and cooperate with each other to form a spherical enclosing space for wrapping the basket wire; the two ends of the support rods are respectively hinged to the arc-shaped grippers and the sheath; the sheath is provided with a strip-shaped groove, and the strip-shaped groove matches the shape and size of the support rod.

[0011] By adopting the above technical solution, multiple hinged arc-shaped grippers and support rods are used to form an expandable and retractable spherical protective shield. In the retracted state, the entire mechanism can be compactly stored around the sheath, ensuring that the device can be smoothly inserted into the body. In the expanded state, the multiple arc-shaped grippers can work together to form a complete spherical enclosing space, completely enclosing the basket and the captured stones, providing a smooth and sealed channel for stone removal. This not only prevents stones from falling out but also reduces scratches and damage to surrounding healthy tissues. At the same time, the strip grooves on the sheath match the shape and size of the support rods, which can limit the storage of the support rods when the grippers are retracted, reducing the overall radial space occupied by the device, adapting to the anatomical environment of hepatobiliary stenosis, and improving the clinical applicability of the device.

[0012] The present invention is further configured such that the number of the arc-shaped grippers is three.

[0013] By adopting the above technical solution, three grippers can stably form a spherical wrapping space through a triangular force-bearing structure. This ensures the tightness of the wrapping and avoids the opening and closing jamming caused by the linkage of multiple grippers. At the same time, the opening and closing angle of the three grippers is larger and the movement is more flexible. They can be adapted to different sizes of mesh wire and stones, making them more widely applicable. Furthermore, they can form uniform wrapping pressure when closing, avoiding excessive local pressure that could cause stone breakage or mesh wire deformation, thus improving the movement accuracy of the protection mechanism.

[0014] The present invention is further configured such that: the graded linkage mechanism includes a first sliding block, a first helical spring, a second sliding block, a second helical spring, and a connecting rod; the first sliding block slides inside the sheath, and its two sides are respectively connected to the core rod and the connecting rod; the second sliding block is sleeved on the connecting rod and slides inside the sheath; the second helical spring is sleeved on the connecting rod and its two ends are respectively connected to the first sliding block and the second sliding block; the second helical spring is sleeved on the connecting rod and its two ends are respectively connected to the second sliding block and the sheath.

[0015] By adopting the above technical solution, and utilizing the combination of sliding block one, sliding block two, and helical springs one and two with different stiffness coefficients, the single input force of the operating handle is decomposed into two clear and orderly action stages. The initial force first overcomes the softer helical spring one, pushing the core rod and the basket wire to complete the stone retrieval. When the force increases to a certain extent, it continues to overcome the harder helical spring two, thereby activating the stone retrieval protection mechanism. This mechanical sequential control ensures that the stone retrieval action must be completed first and independently, avoiding premature interference of the protection mechanism with the basket stone retrieval due to misoperation. The action is precise and reliable.

[0016] The present invention is further configured such that the stiffness coefficient of the first helical spring is less than that of the second helical spring.

[0017] By adopting the above technical solution, the stiffness coefficient of the first helical spring controlling the action of the basket is set to be less than that of the second helical spring controlling the action of the protective mechanism. This physically ensures the sequence of force transmission. When medical personnel apply a small force, only the basket will move to grab the stone. Only when the stone is confirmed to be firmly grasped and a larger force is required will the protective mechanism be activated. This provides clear force feedback to medical personnel, making the switching between the two stages intuitive and controllable, effectively preventing the accidental activation of the protective mechanism and improving the accuracy of operation.

[0018] The present invention is further configured such that: the sliding block 2 is provided with a snap-fit ​​protrusion, and the inner wall of the sleeve is provided with a snap-fit ​​groove that matches the size of the snap-fit ​​protrusion.

[0019] By adopting the above technical solution, a locking protrusion and groove structure is set on the sliding block 2. When the stone retrieval protection mechanism is fully extended, the locking protrusion will be embedded in the locking groove, producing a clear tactile or audible feedback, clearly informing medical personnel that the stone retrieval protection mechanism has been successfully locked in the extended position and the stone retrieval operation can begin. During the retrieval process, it prevents the protection mechanism from accidentally retracting due to external force fluctuations. Furthermore, it provides resistance to the stone retrieval protection mechanism when using a wire mesh for stone retrieval, ensuring that the stone retrieval protection mechanism will only be activated after the stone retrieval is completed. This further guarantees the priority of the stone retrieval action and enhances the reliability and accuracy of the device for stone retrieval.

[0020] The present invention is further configured such that: the operation control mechanism includes a first handle and a second handle; the end of the sleeve is fixedly connected to the second handle, the first handle and the second handle are hinged together, and the first handle is connected to the connecting rod.

[0021] By adopting the above technical solution, the operation control mechanism is set as a hinged first and second handle. The handle design is similar to scissors or pliers, which conforms to the ergonomic principle. Medical staff can complete all operations with one hand, which is intuitive and labor-saving. By squeezing the handle, the internal connecting rod can be pushed and pulled naturally, thereby remotely and precisely controlling the basket and protection mechanism located deep in the body. This simplifies the complex intracavitary operation into a hand movement that is in line with the medical staff's habits, greatly improving the operability and convenience of the operation.

[0022] The present invention is further configured such that: a sliding groove is provided at the connection between the second handle and the sleeve, and a sliding block three and a spiral spring three are provided in the sliding groove. The sliding block three is fixedly sleeved on the connecting rod and slides in the sliding groove. The two ends of the spiral spring three are fixedly connected to the sleeve and the sliding block three, respectively.

[0023] By adopting the above technical solution, the helical spring provides a normal return force, so that when medical staff release the handle, the entire linkage mechanism, including the basket wire and the stone retrieval protection mechanism, can automatically return to the initial retracted state under the action of the spring force. This not only facilitates the reuse of the device, but also allows for quick and safe retraction of the instrument when it is necessary to temporarily adjust the position or re-grasp during surgery, avoiding unnecessary pulling or damage to the tissue and improving the efficiency and safety of the surgery.

[0024] The present invention is further configured such that: a sliding lock is provided between the first handle and the second handle, the sliding lock being used to control the relative movement and positioning between the first handle and the second handle.

[0025] By adopting the above technical solution, a sliding lock is set between the first and second handles. After the medical staff successfully grasps the stone, they can use the sliding lock to lock the relative positions of the first and second handles. This function can free the medical staff's hands, eliminating the need to continuously squeeze the handles, reducing operational fatigue. More importantly, it can ensure that the state of the basket and the protective mechanism remains unchanged throughout the entire process of removing the stone from the body, completely eliminating the risk of stone loosening due to unstable hand strength, and providing the ultimate guarantee for the safe removal of the stone.

[0026] The present invention is further configured such that a supporting spring is provided between the first handle and the second handle.

[0027] By adopting the above technical solution, the support spring between the first and second handles provides continuous elastic support, allowing the handles to remain naturally open when not in use. This facilitates quick gripping and initial positioning by medical personnel, avoids operational inconvenience caused by handle contact, and improves surgical preparation efficiency. At the same time, the elastic buffering effect of the support spring absorbs the impact force during operation, preventing wear caused by hard contact between the handles and extending the service life of the handles. It also reduces vibration transmission during operation, improves the stability and comfort of the grip for medical personnel, and effectively adapts to the different operating force habits of medical personnel.

[0028] In summary, the present invention has the following beneficial effects:

[0029] 1. This invention uses a stone removal protection mechanism composed of arc-shaped grippers to completely wrap the basket after stone removal, providing a smooth and closed channel for stone removal. This fundamentally solves the problem of stone detachment caused by loosening, fragmentation, or scraping against tissue, greatly improving the success rate of single stone removal, significantly reducing the risk of needing a second surgery due to residual stones, and avoiding complications such as biliary inflammation and obstruction, thus alleviating the patient's pain and economic burden.

[0030] 2. This invention can reduce tissue damage. The stone retrieval protection mechanism in its retracted state has a small cross-section, and its spherical surface is smooth when unfolded, which can effectively reduce scratches and damage to healthy tissues such as the bile duct during entry, operation and retrieval. At the same time, the stone retrieval protection mechanism has an independent auxiliary stone retrieval function. The stone retrieval protection mechanism is composed of three arc-shaped grippers, which is itself an independently controllable robotic arm. After the basket grabs the main stone, or when facing stones that are difficult to directly wrap with the basket, located in corners or embedded, medical personnel can directly operate the arc-shaped grippers to open, approach and close after using the basket, so as to grab and remove these scattered stones in the surrounding area. This device integrates the functions of basket stone retrieval and gripper stone retrieval, expands its application scenarios, and achieves more thorough cleaning of stones in the surgical area.

[0031] 3. The hierarchical linkage mechanism of this invention ensures the automated process of first retrieving stones with the basket and then activating the protection mechanism. Based on this, medical personnel can choose to activate only the stone retrieval protection mechanism composed of arc-shaped grippers for independent stone retrieval by precisely controlling the operating force. This achieves seamless switching between the two stone retrieval modes, significantly shortening the operation time. At the same time, the difference in spring stiffness coefficient provides clear tactile feedback to medical personnel, which not only distinguishes between basket operation and protection actions, but also makes the force more precise and controllable when controlling the arc-shaped grippers for retrieval, improving the accuracy of all operation modes.

[0032] 4. This invention adopts a hinged handle design, which can complete all complex operations with one hand, making it intuitive and labor-saving. The sliding lock can lock the handle, freeing up the hands of medical staff. Whether in the protective state or after using the grabber to remove stones, it can ensure a constant state and prevent accidental loosening. At the same time, the setting of the three spiral springs allows the device to automatically reset after the handle is released, which facilitates quick switching between different stone removal modes and reuse, improving surgical efficiency.

[0033] 5. In this invention, the support rod can be completely stored in the strip groove when the stone retrieval protection mechanism is retracted, which greatly reduces the radial dimension of the device, making it flexible for use in the narrow space of the hepatobiliary lumen. It has strong clinical applicability. At the same time, the stone retrieval protection mechanism adopts three arc-shaped grippers, which utilize the principle of triangular stability. It can form a tight wrap when used as a protective cover, and can also provide a stable and uniform clamping force when used as stone retrieval forceps, avoiding movement jamming, opening and closing flexibly, and adapting to stones of different sizes and locations.

[0034] 6. The present invention provides a locking sensation when the mechanism is fully extended by using the locking protrusion and groove inside the sleeve with the sliding block two. This serves as a confirmation signal of successful operation and also prevents the mechanism from accidentally retracting during operation, resulting in extremely high reliability. At the same time, the support spring between the handles not only keeps the handles naturally open for easy operation, but also plays a role in buffering and shock absorption, improving the comfort of medical staff during long-term, multi-mode operation and extending the service life of the device. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the appearance of a hepatobiliary surgery clinical stone removal device according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the operation of a hepatobiliary surgery clinical stone removal device according to an embodiment of the present invention.

[0037] Figure 3 This is a structural cross-sectional view of a hepatobiliary surgical lithotripsy device according to an embodiment of the present invention;

[0038] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0039] Figure 5 yes Figure 3 Enlarged diagram of point B in the middle.

[0040] In the diagram: 1. Core rod; 2. Basket wire; 3. Sheath; 4. Sleeve; 5. Arc-shaped gripper; 6. Support rod; 7. Sliding block one; 8. Helical spring one; 9. Sliding block two; 10. Helical spring two; 11. Connecting rod; 12. Snap-fit ​​protrusion; 13. First handle; 14. Second handle; 15. Sliding through groove; 16. Sliding block three; 17. Helical spring three; 18. Sliding lock; 19. Support spring; 20. Strip groove; 21. Snap-fit ​​groove. Detailed Implementation

[0041] The following is in conjunction with the appendix Figures 1-5 The present invention will be described in further detail below.

[0042] Example: A clinical stone retrieval device for hepatobiliary surgery includes a core rod 1, a basket wire 2 at the left end of the core rod 1, a sheath 3 sleeved on the outside of the core rod 1, and a sleeve 4 sleeved on the sheath 3. A stone retrieval protection mechanism is provided at the left end of the sleeve 4 to prevent stones from falling during the stone retrieval process. A graded linkage mechanism is installed between the stone retrieval protection mechanism and the sheath 3. The graded linkage mechanism first controls the basket wire 2 to retrieve the stone, and then controls the stone retrieval protection mechanism to protect the basket wire 2 during the stone retrieval operation. The sleeve 4 is located away from the stone retrieval protection mechanism. An operation control mechanism is provided at the end. The operation control mechanism is used to control the operation of the hierarchical linkage mechanism. The hierarchical linkage mechanism integrates the stone retrieval process performed by the basket wire 2 and the protection process performed by the stone retrieval protection mechanism into a continuous and automated operation process. The operator only needs to use a single operation control mechanism to first accurately control the basket to grab the stone, and then automatically trigger the stone retrieval protection mechanism to wrap the entire basket wire 2, effectively preventing the stone from falling off or remaining due to loosening, breaking, or scraping against tissue during the retrieval path.

[0043] In this preferred embodiment, the stone-removing protection mechanism includes multiple arc-shaped grippers 5 and multiple support rods 6 corresponding to the number of arc-shaped grippers 5. The multiple arc-shaped grippers 5 are all hinged to the left end of the sleeve 4 and cooperate with each other to form a spherical enclosing space for wrapping the net basket wire 2. The two ends of the support rods 6 are respectively hinged to the arc-shaped grippers 5 and the sheath 3. The sheath 3 is provided with a strip groove 20, and the shape and size of the strip groove 20 match the support rod 6. By using multiple hinged arc-shaped grippers 5 and support rods 6, a spherical protective cover that can be unfolded and retracted is formed. In the retracted state, the entire mechanism can be compactly stored around the sleeve 4 to ensure that the device can be smoothly inserted into the body. In the unfolded state, the multiple arc-shaped grippers 5 can work together to form a complete spherical enclosing space, completely wrapping the net basket and the stones it captures.

[0044] In this preferred embodiment, the number of arc-shaped grippers 5 is 3. The 3 grippers can stably form a spherical wrapping space through the triangular force structure, which can not only ensure the tightness of the wrapping, but also avoid the opening and closing jamming caused by the linkage of multiple grippers. At the same time, the opening and closing angle of the 3 grippers is larger and the movement is more flexible, which can be adapted to different sizes of mesh wire 2 and stones, thus having a wider range of applications. Moreover, it can form a uniform wrapping pressure when closing, avoiding excessive local pressure that could cause stone breakage or mesh wire 2 deformation, thereby improving the action accuracy of the protection mechanism.

[0045] In this preferred embodiment, the graded linkage mechanism includes a sliding block 7, a spiral spring 8, a sliding block 9, a spiral spring 10, and a connecting rod 11. The sliding block 7 slides inside the sheath 3, and its two sides are connected to the core rod 1 and the connecting rod 11, respectively. The sliding block 9 is sleeved on the connecting rod 11 and slides inside the sleeve 4. The spiral spring 8 is sleeved on the connecting rod 11, and its two ends are connected to the sliding block 7 and the sliding block 9, respectively. The spiral spring 10 is sleeved on the connecting rod 11, and its two ends are connected to the sliding block 9 and the sleeve 4, respectively. By using the combination of the sliding block 7, the sliding block 9, and the spiral springs 8 and 10 with different stiffness coefficients, the single input force of the operating handle is decomposed into two clear and orderly action stages. The initial force first overcomes the softer spiral spring 8, pushing the core rod 1 and the wire mesh 2 to complete the stone removal. When the force increases to a certain extent, it continues to overcome the harder spiral spring 10, thereby activating the stone removal protection mechanism.

[0046] In this preferred embodiment, the stiffness coefficient of helical spring 8 is less than that of helical spring 10. By setting the stiffness coefficient of helical spring 8, which controls the action of the basket, to be less than that of helical spring 10, which controls the action of the protective mechanism, the transmission sequence of the operating force is physically ensured. When the medical staff applies a small force, only the basket will move to grab the stone. Only when it is confirmed that the stone is firmly grasped and a larger force is required will the protective mechanism be activated. This provides clear force feedback to the medical staff, making the switching between the two stages intuitive and controllable, and effectively preventing the accidental activation of the protective mechanism.

[0047] In this preferred embodiment, the sliding block 2 9 is provided with a locking protrusion 12, and the inner wall of the sleeve 4 is provided with a locking groove 21 that matches the size of the locking protrusion 12. When the stone removal protection mechanism is fully extended, the locking protrusion 12 will be embedded in the locking groove 21, producing a clear tactile or auditory feedback, clearly informing medical personnel that the stone removal protection mechanism has been successfully locked in the extended position and the stone removal operation can begin. During the removal process, it prevents the protection mechanism from accidentally retracting due to external force fluctuations. Furthermore, when using the wire mesh 2 to remove stones, it also provides a resistance limit to the stone removal protection mechanism, ensuring that the stone removal protection mechanism will only be activated after the stone removal is completed, further guaranteeing the priority order of the stone removal action.

[0048] In this preferred embodiment, the operation control mechanism includes a first handle 13 and a second handle 14; the end of the sleeve 4 is fixedly connected to the second handle 14, the first handle 13 and the second handle 14 are hinged, the first handle 13 is connected to the connecting rod 11, and the operation control mechanism is provided as the hinged first and second handles 14. The handle design is similar to scissors or pliers, which conforms to the ergonomic principle. Medical personnel can complete all operations with one hand, which is intuitive and labor-saving. By squeezing the handle, the internal connecting rod 11 can be pushed and pulled naturally, thereby remotely and accurately controlling the basket and protective mechanism located deep in the body.

[0049] In this preferred embodiment, a sliding groove 15 is provided at the connection between the second handle 14 and the sleeve 4. A sliding block 3 16 and a spiral spring 3 17 are provided in the sliding groove 15. The sliding block 3 16 is fixedly sleeved on the connecting rod 11 and slides within the sliding groove 15. The two ends of the spiral spring 3 17 are fixedly connected to the sleeve 4 and the sliding block 3 16, respectively. The spiral spring 3 17 provides a normal return elastic force, so that when the medical staff releases the handle, the entire linkage mechanism, including the basket wire 2 and the stone retrieval protection mechanism, can automatically return to the initial retracted state under the action of the elastic force. This not only facilitates the reuse of the device, but also allows for quick and safe retraction of the instrument if the position needs to be temporarily adjusted or the instrument needs to be re-grasped during surgery.

[0050] In this preferred embodiment, a sliding lock 18 is provided between the first handle 13 and the second handle 14. The sliding lock 18 is used to control the relative movement and positioning between the first handle 13 and the second handle 14. With the sliding lock 18 provided between the first handle 13 and the second handle 14, after the medical staff successfully grasps the stone, the relative position of the first and second handles 14 can be locked using the sliding lock 18. This function can free the medical staff's hands, eliminating the need to continuously squeeze the handles, reducing operational fatigue. More importantly, it can ensure that the state of the basket and the protective mechanism remains unchanged throughout the entire process of removing the stone from the body.

[0051] In this preferred embodiment, a support spring 19 is fixedly installed between the first handle 13 and the second handle 14 to provide continuous elastic support, so that the handle remains in a naturally open state when not in operation, which makes it convenient for medical personnel to quickly grasp and initially position the handle, avoids the inconvenience caused by the handle being too close, and improves the efficiency of surgical preparation. At the same time, the elastic buffering effect of the support spring 19 can absorb the impact of the force during operation, avoid wear caused by hard contact between the handles, and extend the service life of the handles.

[0052] Working principle: In the initial state, under the action of the helical spring 17, the basket wire 2 is retracted into the sheath 3, and the three arc-shaped grippers 5 are also retracted and nested outside the sleeve 4. The overall cross-section of the device is minimized, making it easy to enter the target location inside the body. During the stone removal stage, the medical staff gently squeezes the first handle 13 and the second handle 14, which pushes the sliding block 7 and the core rod 1 forward through the connecting rod 11, causing the basket wire 2 to extend and open, and after it covers the stone, the handles are gently squeezed again. The force first overcomes the elasticity of the helical spring 8. The net basket wire 2 tightens to capture the stone. After confirming a firm grip, the medical staff increases the squeezing force to overcome the resistance of the spiral spring 10 and push the sliding block 9 to move. This action drives the three arc-shaped gripping plates 5 to expand radially through the support rod 6, forming a spherical protective cover that completely wraps the net basket and the stone inside, preventing it from falling off during removal. When locking and resetting, the handle is locked by the sliding lock 18 to maintain the protective or gripping state. After releasing the handle, all mechanisms automatically reset to the initial state under the action of each spiral spring.

[0053] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A clinical stone removal device for hepatobiliary surgery, characterized in that: Includes a core rod (1), with a wire mesh (2) at the end of the core rod (1), a sheath (3) outside the core rod (1), a sleeve (4) on the sheath (3), and a stone-removing protection mechanism on the sleeve (4). The stone-removing protection mechanism is used to prevent stones from falling during the stone-removing process. A graded linkage mechanism is provided between the stone-removing protection mechanism and the sheath (3). The graded linkage mechanism is used to first control the wire mesh (2) to remove stones, and then control the stone-removing protection mechanism to protect the wire mesh (2) from removing stones. An operation control mechanism is provided at the end of the sleeve (4) away from the stone-removing protection mechanism. The operation control mechanism is used to control the operation of the graded linkage mechanism.

2. The hepatobiliary surgical lithotripsy device according to claim 1, characterized in that: The stone-collecting protection mechanism includes multiple arc-shaped grippers (5) and multiple support rods (6) corresponding to the number of arc-shaped grippers (5); the multiple arc-shaped grippers (5) are all hinged to the sleeve (4) and cooperate with each other to form a spherical enclosing space for wrapping the net wire (2). The two ends of the support rod (6) are respectively hinged to the arc-shaped grippers (5) and the sheath (3). The sheath (3) is provided with a strip groove (20), and the shape and size of the strip groove (20) match the support rod (6).

3. The hepatobiliary surgical lithotripsy device according to claim 2, characterized in that: The number of the arc-shaped gripper (5) is 3.

4. The hepatobiliary surgical lithotripsy device according to claim 1, characterized in that: The graded linkage mechanism includes a sliding block 1 (7), a spiral spring 1 (8), a sliding block 2 (9), a spiral spring 2 (10), and a connecting rod (11). The sliding block 1 (7) slides inside the sheath (3), and its two sides are connected to the core rod (1) and the connecting rod (11) respectively. The sliding block 2 (9) is sleeved on the connecting rod (11) and slides inside the sleeve (4). The spiral spring 1 (8) is sleeved on the connecting rod (11) and its two ends are connected to the sliding block 1 (7) and the sliding block 2 (9) respectively. The spiral spring 2 (10) is sleeved on the connecting rod (11) and its two ends are connected to the sliding block 2 (9) and the sleeve (4) respectively.

5. The hepatobiliary surgical lithotripsy device according to claim 4, characterized in that: The spring constant of the first helical spring (8) is less than that of the second helical spring (10).

6. The hepatobiliary surgical lithotripsy device according to claim 4, characterized in that: The sliding block 2 (9) is provided with a snap-fit ​​protrusion (12), and the inner wall of the sleeve (4) is provided with a snap-fit ​​groove (21) that matches the size of the snap-fit ​​protrusion (12).

7. The hepatobiliary surgical lithotripsy device according to claim 1, characterized in that: The operation control mechanism includes a first handle (13) and a second handle (14); the end of the sleeve (4) is fixedly connected to the second handle (14), the first handle (13) and the second handle (14) are hinged, and the first handle (13) is connected to the connecting rod (11).

8. A clinical stone removal device for hepatobiliary surgery according to claim 7, characterized in that: The second handle (14) is provided with a sliding groove (15) at the connection between it and the sleeve (4). The sliding groove (15) is provided with a sliding block three (16) and a spiral spring three (17). The sliding block three (16) is fixedly sleeved on the connecting rod (11) and slides in the sliding groove (15). The two ends of the spiral spring three (17) are fixedly connected to the sleeve (4) and the sliding block three (16) respectively.

9. A clinical stone removal device for hepatobiliary surgery according to claim 7, characterized in that: A sliding latch (18) is provided between the first handle (13) and the second handle (14), and the sliding latch (18) is used to control the relative movement and positioning between the first handle (13) and the second handle (14).

10. A clinical stone removal device for hepatobiliary surgery according to claim 7, characterized in that: A support spring (19) is provided between the first handle (13) and the second handle (14).

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