Anti-falling calculus taking-out device for hepatobiliary surgery

Abstract

The invention belongs to the technical field of medical auxiliary instruments, and discloses an anti-falling calculus taking-out device for hepatobiliary surgery, which comprises an operating forceps main body and a fixed grip at the upper part of the operating forceps main body, and further comprises a clamping assembly mounted on the operating forceps main body, and an extension section is fixedly connected to the bottom end of a rod body part of the operating forceps main body; a pressure relief assembly capable of exhausting redundant gas in the clamping assembly is arranged at the top end of the clamping assembly. According to the scheme, the movable grip main body is held to rotate, so that a straight notch drives a convex shaft and the whole clamping assembly descends, after the stone is clamped by the bottom of a semicircular rod and a supporting and lifting piece, gas in a spring telescopic rod is compressed, and after the pressure in the spring telescopic rod and the pressure in a hollow cylindrical rod exceed a set value, gas in the spring telescopic rod is compressed. The gas can be discharged outwards through the pressure relief assembly, so that the continuous and stable clamping operation of the device on the stone is ensured, and the situation that the stone falls off due to the fact that the clamping force of the device on the stone is too large and the stone slips is avoided.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary device technology, specifically a stone removal device for hepatobiliary surgery that prevents dislodgement. Background Technology

[0002] Surgical forceps are among the most basic and important instruments in surgery. Essentially, they are precision clamping tools used to grasp, fix, move, or compress tissues during surgery. In cases where stones are located in the common bile duct, the surgeon will cut open the common bile duct and use long, curved surgical forceps to reach deep into the duct and remove the stones.

[0003] For example, the invention disclosed in CN102525595A relates to a groundbreaking, minimally invasive surgical forceps. A flexible, visual surgical forceps includes a main tube connected to an endoscope, a flexible tube connected to the other end of the main tube, a front end head at the end of the flexible tube, a forceps head and a lens assembly connected to the front end head, a water spray nozzle connected to an irrigation port located on the endoscope, a traction cable connected to the flexible tube and a lever, and a forceps handle on the endoscope. This invention provides a flexible, visual surgical forceps that can be both flexible and rigid, adaptable to various situations, allowing the surgical instrument to be rotated to any angle for easy observation, improving the safety and stability of the surgery, ensuring that the channels within the main tube do not interfere with each other, and facilitating cleaning; it solves the technical problems of existing surgical forceps that cannot be bent at angles, are inconvenient for doctors to observe, require surgical instruments to be used in conjunction with an endoscope, involve multiple instruments, and cause significant trauma to the patient.

[0004] When operators use the aforementioned surgical forceps to remove stones from a patient's liver and gallbladder, the clamping mechanism of the device may cause the clamps to slip and fall off due to excessive force applied by the operator. Additionally, the excessive outward opening of the clamps can easily lead to accidental injuries during surgery.

[0005] Therefore, in order to solve the above problems, a stone removal device for hepatobiliary surgery that prevents dislodgement has been proposed. Summary of the Invention

[0006] To address the problems mentioned in the background art, the present invention provides a stone removal device for hepatobiliary surgery that prevents slippage, solving the problem that when operators use surgical forceps to clamp and remove stones from the liver and gallbladder, excessive force causes the clamps to slip on the stone surface.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a stone removal device for hepatobiliary surgery that prevents detachment, comprising a surgical forceps body and a fixed handle on its upper part, wherein an extension section is fixedly connected to the bottom end of the rod portion of the surgical forceps body, and further comprising a clamping assembly installed on the surgical forceps body, wherein a pressure relief assembly is provided at the top end of the clamping assembly to discharge excess gas in the clamping assembly, and the pressure relief assembly can move vertically within the surgical forceps body, and a movable handle assembly for driving the clamping assembly downward is also provided at the top of the surgical forceps body; The clamping assembly includes a hollow cylindrical rod, a spring telescopic rod, and a semi-circular rod with its bottom end extending to the outside of the surgical forceps body, which are vertically movably installed in the main body of the surgical forceps. The two ends of the spring telescopic rod are fixedly connected to the bottom of the hollow cylindrical rod and the top of the semi-circular rod, respectively. In the initial state, the spring telescopic rod is in an extended state, and the sleeve part of the spring telescopic rod is connected to the bottom of the hollow cylindrical rod. The top of the hollow cylindrical rod is connected to the pressure relief assembly. The bottom of the extension section is provided with a support member, which can overlap with the semi-circular rod in the vertical direction when the semi-circular rod moves downward.

[0008] Preferably, the hollow cylindrical rod has a convex shaft at its top end; The movable grip assembly includes a movable grip body hinged to the top of the surgical forceps body, and one end of the movable grip body extends into the surgical forceps body and has a straight groove. A tension spring is fixedly connected to the upper surface of the movable grip body, and the other end of the tension spring is fixedly connected to the surgical forceps body. The convex shaft can slide within the straight groove.

[0009] Preferably, the pressure relief assembly includes a cylindrical component fixedly connected to the top end of a hollow cylindrical rod. The bottom of the cylindrical component is provided with an annular flange. A hollow sealing component capable of sealing the annular flange is movably installed at the bottom of the cylindrical component. A one-way valve disc capable of unidirectional downward conduction is also provided in the cavity of the hollow sealing component. A limiting component is provided at the top of the cylindrical component. An elastic support component is provided between the bottom of the limiting component and the top end of the hollow sealing component, and the bottom of the elastic support component is a circular annular gasket. The outer diameter of the bottom annular gasket of the hollow sealing component and the elastic support component is smaller than the inner diameter of the cylindrical component.

[0010] Preferably, the outer periphery of the limiting member is externally threaded, and the upper part of the inner part of the cylindrical member is internally threaded to cooperate with the limiting member. Rotating the limiting member downward can compress and store force in the elastic support member. In its initial state, the upper end of the limiting member is located outside the main body of the surgical forceps.

[0011] Preferably, the portion of the hollow sealing member located above the annular flange is disc-shaped with a diameter greater than the inner diameter of the annular flange, and the portion of the hollow sealing member located below the annular flange is conical with a diameter smaller than the inner diameter of the annular flange.

[0012] Preferably, the limiting member has a through cavity, through which the cavity of the cylindrical member can communicate with the outside.

[0013] Preferably, the support member is hinged to the bottom of the extension section, and the main body of the surgical forceps is also provided with a connecting rod 2 that can be driven by the semi-circular rod and move downward. When the connecting rod 2 moves downward, it can drive the support member to rotate and overlap with the bottom of the semi-circular rod in the vertical direction.

[0014] Preferably, the top of the support member is hinged with a connecting rod one, and the bottom of the connecting rod two extends into the extension section and can be hinged with the top of the connecting rod one. In the initial state, the connecting rod one has an angle with the axial direction of the extension section. The semi-circular rod has a groove, and the top of the connecting rod has an inclined surface. Initially, the bottom of the inclined surface coincides with the groove in the vertical direction. When the groove moves downward, it can drive the inclined surface downward.

[0015] Preferably, the top of the second connecting rod and the side away from the semicircular rod are provided with an arc-shaped notch, and the main body of the surgical forceps is also provided with a receiving cavity; As the inclined plane descends, its lower top surface will abut against the main body of the surgical forceps, and as the groove continues to descend, it can squeeze the inclined plane and cause the top ends of the connecting rods to bend into the receiving cavity; The second connecting rod is initially in a vertical position.

[0016] Preferably, a limiting end is provided at the bottom of the extension section, and after the support member rotates 90 degrees around the axis, its connection end with the connecting rod can be limited by the limiting end.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The above solution involves gripping the main body of the movable handle and rotating it, which drives the straight groove to drive the convex shaft and lower the entire clamping assembly. After the bottom of the semi-circular rod and the support member clamp the stone, the continued downward movement of the hollow cylindrical rod will compress the spring telescopic rod, thereby compressing the gas inside the spring telescopic rod. When the pressure inside the spring telescopic rod and the hollow cylindrical rod exceeds the set value, the gas will be discharged outward through the pressure relief component, ensuring that the device can continuously and stably clamp the stone, thus avoiding the situation where the device slips due to excessive clamping force and the stone falls out. In the above scheme, when the gas inside the spring telescopic rod and the hollow cylindrical rod is compressed and reaches a threshold, the gas will push the hollow sealing component upward. At this time, the gas will be discharged through the gap between the annular flange and the hollow sealing component. When the spring telescopic rod returns to its original position and extends, the pressure inside the spring telescopic rod will first return to normal, and then its internal pressure will decrease again. At this time, the external gas will enter the hollow cylindrical rod in one direction through the one-way valve to replenish the discharged gas, thereby ensuring that the device can work continuously and stably. In the above-described scheme, as the semi-circular rod descends, the inclined surface at the top of the groove pushes the second connecting rod downwards. When the height of the top of the inclined surface is lower than the height of the top of the receiving cavity, and the lower surface of the top of the second connecting rod contacts the main body of the surgical forceps, the continued downward movement of the groove will squeeze the inclined surface and deflect it into the receiving cavity. Subsequently, the inclined surface disengages from the groove, and the outer periphery of the semi-circular rod restricts the top of the inclined surface, thereby locking the second connecting rod. When the second connecting rod descends, it will push the support and lifting component to rotate 90 degrees through the first connecting rod, so that the bottom of the semi-circular rod and the support and lifting component overlap in the vertical direction, which can achieve the clamping of the stone. This avoids the situation where the existing clamps expand outwards to clamp the stone, occupying too much space and easily causing surgical accidents. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the frontal planar structure of the present invention; Figure 3 This is the formal plan perspective view of the present invention; Figure 4 This is a schematic diagram of the clamping assembly of the present invention; Figure 5 This is a front cross-sectional view of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 for Figure 5 Enlarged view of point B in the middle; Figure 8 for Figure 5 Enlarged view of point C in the middle; Figure 9 This is a partial cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1. Surgical forceps body; 11. Fixed grip; 12. Extension section; 121. Limiting end; 13. Receiving cavity; 2. Clamping assembly; 21. Hollow cylindrical rod; 211. Convex shaft; 22. Spring telescopic rod; 23. Semi-circular rod; 231. Groove; 3. Pressure relief assembly; 31. Cylinder component; 32. Hollow sealing component; 33. One-way valve disc; 34. Limiting component; 341. Through cavity; 35. Elastic support component; 4. Moving grip assembly; 41. Moving grip body; 42. Tension spring; 43. Straight groove; 5. Support and lifting component; 51. Connecting rod one; 6. Connecting rod two; 61. Inclined surface; 62. Arc-shaped notch. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 9 As shown, the present invention provides a stone removal device for hepatobiliary surgery that prevents detachment, including a surgical forceps body 1 and a fixed handle 11 on its upper part. An extension section 12 is fixedly connected to the bottom end of the rod part of the surgical forceps body 1. It also includes a clamping component 2 installed on the surgical forceps body 1. The top end of the clamping component 2 is provided with a pressure relief component 3 that can discharge excess gas in the clamping component 2. The pressure relief component 3 can move vertically within the surgical forceps body 1. The top of the surgical forceps body 1 is also provided with a movable handle component 4 for driving the clamping component 2 downward. The clamping assembly 2 includes a hollow cylindrical rod 21 vertically movably installed in the surgical forceps body 1, a spring telescopic rod 22, and a semi-circular rod 23 extending to the outside of the surgical forceps body 1. The two ends of the spring telescopic rod 22 are fixedly connected to the bottom of the hollow cylindrical rod 21 and the top of the semi-circular rod 23, respectively. In the initial state, the spring telescopic rod 22 is in an extended state, and the sleeve part of the spring telescopic rod 22 is connected to the bottom of the hollow cylindrical rod 21. The top of the hollow cylindrical rod 21 is connected to the pressure relief assembly 3. The bottom of the extension section 12 is provided with a support member 5, which can overlap with the semi-circular rod 23 in the vertical direction when the semi-circular rod 23 moves downward. The hollow cylindrical rod 21 has a convex shaft 211 at its top end; the movable grip assembly 4 includes a movable grip body 41 hinged to the top of the surgical forceps body 1, and one end of the movable grip body 41 extends into the surgical forceps body 1 and has a straight groove 43. A tension spring 42 is fixedly connected to the upper surface of the movable grip body 41, and the other end of the tension spring 42 is fixedly connected to the surgical forceps body 1; the convex shaft 211 can slide within the straight groove 43.

[0022] Using the above scheme, by gripping the main body 41 of the moving handle and rotating it, the straight groove 43 drives the convex shaft 211 and causes the clamping assembly 2 to move downward as a whole. After the bottom of the semi-circular rod 23 clamps the stone with the support and lifting member 5, the continued downward movement of the hollow cylindrical rod 21 will compress the spring telescopic rod 22, thereby compressing the gas inside the spring telescopic rod 22. When the pressure inside the spring telescopic rod 22 and the hollow cylindrical rod 21 exceeds the set value, the gas will be discharged outward through the pressure relief assembly 3, ensuring that the device can continuously and stably clamp the stone, thereby avoiding the situation where the device slips due to excessive clamping force on the stone, causing the stone to fall off.

[0023] like Figures 1-6 As shown, the pressure relief assembly 3 includes a cylindrical component 31 fixedly connected to the top end of the hollow cylindrical rod 21. The bottom of the cylindrical component 31 is provided with an annular flange. A hollow sealing component 32 that can seal the annular flange is movably installed at the bottom of the cylindrical component 31. A one-way valve disc 33 that can conduct downward in one direction is also provided in the cavity of the hollow sealing component 32. A limiting component 34 is provided at the top of the cylindrical component 31. An elastic support component 35 is provided between the bottom of the limiting component 34 and the top end of the hollow sealing component 32, and the bottom of the elastic support component 35 is a circular annular gasket. The portion of the hollow sealing component 32 located above the annular flange is disc-shaped with a diameter larger than the inner diameter of the annular flange, while the portion of the hollow sealing component 32 located below the annular flange is cone-shaped with a diameter smaller than the inner diameter of the annular flange. The limiting member 34 has a through cavity 341, through which the cavity of the cylindrical member 31 can communicate with the outside. Using the above scheme, when the gas inside the spring telescopic rod 22 and the hollow cylindrical rod 21 is compressed and reaches the threshold, the gas will push the hollow sealing member 32 upward. At this time, the gas will be discharged through the gap between the annular flange and the hollow sealing member 32. When the spring telescopic rod 22 returns to its original position and extends, the pressure inside it will decrease again. At this time, the external gas will enter the hollow cylindrical rod 21 in one direction through the one-way valve 33 to replenish the discharged gas, thereby ensuring that the device can work continuously and stably.

[0024] like Figures 1-6 As shown, the outer diameter of the bottom annular gasket of the hollow sealing member 32 and the elastic support member 35 is smaller than the inner diameter of the cylindrical member 31; the outer periphery of the limiting member 34 is externally threaded, and the upper part of the inner part of the cylindrical member 31 is internally threaded to cooperate with the limiting member 34. Rotating the limiting member 34 downward can compress and store force in the elastic support member 35. In the initial state, the upper end of the limiting member 34 is located outside the surgical forceps body 1; By adopting the above scheme, the design of the limiting member 34 allows it to move up and down within the cylindrical member 31, thereby changing the compression state of the elastic support member 35 and adjusting the downward pressure on the hollow sealing member 32, so that the operator can change and limit the gripping force of the gripper according to different situations.

[0025] like Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the support member 5 is hinged to the bottom of the extension section 12. The main body of the surgical forceps 1 is also provided with a connecting rod 6 that can be driven by the semi-circular rod 23 and move downward. When the connecting rod 6 moves downward, it can drive the support member 5 to rotate and overlap with the bottom of the semi-circular rod 23 in the vertical direction. The top of the support member 5 is hinged with a connecting rod 51, and the bottom of the connecting rod 6 extends into the extension section 12 and can be hinged with the top of the connecting rod 51. In the initial state, the connecting rod 51 and the axial direction of the extension section 12 are at an angle. The semi-circular rod 23 has a groove 231, and the top of the connecting rod 6 has an inclined surface 61. Initially, the bottom of the inclined surface 61 coincides with the groove 231 in the vertical direction. When the groove 231 moves downward, it can drive the inclined surface 61 to move downward. An arc-shaped notch 62 is provided on the top of the connecting rod 26 and on the side away from the semi-circular rod 23, and a receiving cavity 13 is also provided on the main body of the surgical forceps 1; When the inclined plane 61 descends, its lower top surface will abut against the surgical forceps body 1, and the groove 231 continues to descend, which can squeeze the inclined plane 61 and cause the top of the connecting rod 6 to bend into the receiving cavity 13; the connecting rod 6 is in a vertical state in the initial state. The bottom of the extension section 12 is provided with a limiting end 121. After the support member 5 rotates 90 degrees around the axis, its connection end with the connecting rod 51 can be limited by the limiting end 121. Using the above scheme, when the semicircular rod 23 descends, the inclined surface at the top of the groove 231 pushes the connecting rod 6 downwards. When the height of the top of the inclined surface 61 is lower than the height of the top of the receiving cavity 13, and the lower surface of the top of the connecting rod 6 contacts the surgical forceps body 1, the continued downward movement of the groove 231 will squeeze the inclined surface 61 and deflect it into the receiving cavity 13. Subsequently, the inclined surface 61 disengages from the groove 231, and the outer periphery of the semicircular rod 23 restricts the top of the inclined surface 61, thereby locking the connecting rod 6. When the connecting rod 6 descends, it will push the support member 5 to rotate 90 degrees through the connecting rod 51, so that the bottom of the semicircular rod 23 and the support member 5 overlap in the vertical direction, which can achieve the clamping of the stone and avoid the situation where the existing claws expand outward to clamp the stone and occupy too much space. The extension section 12 has a smaller cross-sectional area than the annular section, making it easier to bypass the stones in the patient's body and thus easier to clamp the stones.

[0026] Working principle and usage process of this invention: The operator grips the main body 41 of the movable handle and rotates it, thereby driving the straight groove 43 to drive the convex shaft 211 and causing the clamping assembly 2 to descend as a whole. After the bottom of the semi-circular rod 23 clamps the stone with the support 5, the continued descent of the hollow cylindrical rod 21 will compress the spring telescopic rod 22, thereby compressing the gas inside the spring telescopic rod 22. When the pressure inside the spring telescopic rod 22 and the hollow cylindrical rod 21 exceeds the set value, the gas will be discharged outward through the pressure relief assembly 3, ensuring the continuous and stable clamping operation of the device on the stone, thus avoiding the situation where the device slips due to excessive clamping force on the stone, causing the stone to fall out; the specific method is as follows: During the downward movement of the hollow cylindrical rod 21, when the gas inside the spring telescopic rod 22 and the hollow cylindrical rod 21 is compressed and reaches the threshold, the gas will push the hollow sealing component 32 upward. At this time, the gas will be discharged through the gap between the annular flange and the hollow sealing component 32. When the spring telescopic rod 22 returns to its original position and extends, the pressure inside the spring telescopic rod 22 will first return to normal, and then the internal pressure will decrease. At this time, the external gas will enter the hollow cylindrical rod 21 in one direction through the one-way valve 33 to replenish the discharged gas, thereby ensuring that the device can work continuously and stably. As the semicircular rod 23 descends, the inclined surface at the top of the groove 231 also engages with the inclined surface 61, thereby pushing the connecting rod 6 downwards. When the height of the top of the inclined surface 61 is lower than the height of the top of the receiving cavity 13, and the lower surface of the top of the connecting rod 6 contacts the surgical forceps body 1, the continued descent of the groove 231 will squeeze the inclined surface 61 and deflect its end, thereby deflecting the top of the inclined surface 61 into the receiving cavity 13. Subsequently, the inclined surface 61 disengages from the groove 231, and the outer periphery of the semicircular rod 23 restricts the top of the inclined surface 61, thereby locking the connecting rod 6. When the connecting rod 6 descends, it will push the support member 5 to rotate 90 degrees through the connecting rod 51, so that the bottom of the semicircular rod 23 and the support member 5 overlap in the vertical direction, which can achieve the clamping of the stone. This avoids the situation where the existing claws expand outwards to clamp the stone, occupying too much space and easily causing surgical accidents.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stone removal device for hepatobiliary surgery that prevents detachment, comprising a surgical forceps body (1) and a fixed handle (11) on its upper part, wherein an extension section (12) is fixedly connected to the bottom end of the rod portion of the surgical forceps body (1), characterized in that: It also includes a clamping assembly (2) installed on the surgical forceps body (1), the top of the clamping assembly (2) is provided with a pressure relief assembly (3) that can discharge excess gas in the clamping assembly (2), and the pressure relief assembly (3) can move vertically inside the surgical forceps body (1). The top of the surgical forceps body (1) is also provided with a movable grip assembly (4) for driving the clamping assembly (2) downward. The clamping assembly (2) includes a hollow cylindrical rod (21) vertically movably installed in the surgical forceps body (1), a spring telescopic rod (22), and a semi-circular rod (23) extending to the outside of the surgical forceps body (1). The two ends of the spring telescopic rod (22) are fixedly connected to the bottom of the hollow cylindrical rod (21) and the top of the semi-circular rod (23), respectively. In the initial state, the spring telescopic rod (22) is in an extended state, and the sleeve part of the spring telescopic rod (22) is connected to the bottom of the hollow cylindrical rod (21). The top of the hollow cylindrical rod (21) is connected to the pressure relief assembly (3). The bottom of the extension section (12) is provided with a support member (5), which can overlap with the semi-circular rod (23) in the vertical direction when the semi-circular rod (23) moves downward.

2. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 1, characterized in that: The hollow cylindrical rod (21) has a convex shaft (211) at its top end. The movable grip assembly (4) includes a movable grip body (41) hinged to the top of the surgical forceps body (1), and one end of the movable grip body (41) extends into the surgical forceps body (1) and is provided with a straight slot (43). A tension spring (42) is fixedly connected to the upper surface of the movable grip body (41), and the other end of the tension spring (42) is fixedly connected to the surgical forceps body (1). The convex shaft (211) can slide within the straight groove (43).

3. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 1, characterized in that: The pressure relief assembly (3) includes a cylindrical component (31) fixedly connected to the top of a hollow cylindrical rod (21). The bottom of the cylindrical component (31) is provided with an annular flange. A hollow sealing component (32) capable of sealing the annular flange is movably installed at the bottom of the cylindrical component (31). A one-way valve disc (33) capable of unidirectional downward conduction is also provided in the cavity of the hollow sealing component (32). A limiting component (34) is provided at the top of the cylindrical component (31). An elastic support component (35) is provided between the bottom of the limiting component (34) and the top of the hollow sealing component (32). The bottom of the elastic support component (35) is a circular gasket. The outer diameter of the bottom annular gasket of the hollow sealing member (32) and the elastic support member (35) is smaller than the inner diameter of the cylindrical member (31).

4. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 3, characterized in that: The outer periphery of the limiting member (34) is externally threaded, and the upper part of the inner part of the cylindrical member (31) is internally threaded to cooperate with the limiting member (34). Rotating the limiting member (34) downward can compress and store force in the elastic support member (35). In the initial state, the upper end of the limiting member (34) is located outside the surgical forceps body (1).

5. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 3, characterized in that: The hollow sealing element (32) located on the upper part of the annular flange is disc-shaped with a diameter greater than the inner diameter of the annular flange, and the hollow sealing element (32) located below the annular flange is cone-shaped with a diameter smaller than the inner diameter of the annular flange.

6. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 3, characterized in that: The limiting member (34) has a through cavity (341), and the cavity of the cylindrical member (31) can be connected to the outside through the through cavity (341).

7. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 1, characterized in that: The support member (5) is hinged to the bottom of the extension section (12). The main body (1) of the surgical forceps is also provided with a connecting rod 2 (6) that can be driven by the semi-circular rod (23) and move downward. When the connecting rod 2 (6) moves downward, it can drive the support member (5) to rotate and overlap with the bottom of the semi-circular rod (23) in the vertical direction.

8. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 7, characterized in that: The top of the support member (5) is hinged with a connecting rod one (51), and the bottom of the connecting rod two (6) extends into the extension section (12) and can be hinged with the top of the connecting rod one (51). In the initial state, the connecting rod one (51) and the extension section (12) have an angle in the axial direction. The semi-circular rod (23) has a groove (231) and the top of the connecting rod (6) has an inclined surface (61). Initially, the bottom of the inclined surface (61) and the groove (231) overlap in the vertical direction. When the groove (231) moves downward, it can drive the inclined surface (61) to move downward.

9. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 8, characterized in that: An arc-shaped notch (62) is provided on the top of the connecting rod 2 (6) and on the side away from the semi-circular rod (23), and a receiving cavity (13) is also provided on the main body of the surgical forceps (1). When the inclined plane (61) descends, its lower surface at the top will abut against the main body (1) of the surgical forceps, and the groove (231) continues to descend, which can squeeze the inclined plane (61) and cause the top of the connecting rod (6) to bend into the receiving cavity (13); The connecting rod 2 (6) is in a vertical state in the initial state.

10. The anti-dislodgement stone removal device for hepatobiliary surgery according to claim 7, characterized in that: The bottom of the extension section (12) is provided with a limiting end (121). After the support member (5) rotates ninety degrees around the axis, its connection end with the connecting rod (51) can be limited by the limiting end (121).

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