Negative pressure tumor resection device for hepatobiliary surgery department

Abstract

The invention discloses a hepatobiliary surgery department negative pressure tumor resection device, which comprises a cutting assembly, a negative pressure generation assembly and a blade flushing assembly, the cutting assembly is composed of a fixed handle, a fixed cutting arm, a fixed blade, a movable handle, a movable cutting arm and a movable blade, and is used for cutting connective tissues and tumors. By means of the integrated driving transmission mechanism, opening and closing of the movable shear arm and reciprocating motion of the piston are in synchronous linkage, negative pressure is automatically generated when the movable shear arm is opened, tumor tissue is stably fixed in a shear opening through a targeted adsorption port, the problem that the tumor tissue is prone to displacement and slipping in the background technology is fundamentally solved, and the tumor tissue treatment efficiency is improved. The excision range deviation and the damage to surrounding normal liver and gall tissues and blood vessels are effectively avoided; meanwhile, an external negative pressure power mechanism is not needed, the structure is simplified, meanwhile, the small surgical scissors specification is adapted, the surgical requirements of deep and narrow surgical areas can be met, the equipment failure risk is reduced, and the surgical continuity is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a negative pressure tumor resection device for hepatobiliary surgery. Background Technology

[0002] In hepatobiliary surgery, the precision of tumor tissue shearing, the stability of intraoperative negative pressure adsorption, and the timely cleaning effect of the blade between multiple shearing intervals directly affect surgical efficiency, operational safety, and postoperative recovery. Currently used hepatobiliary tumor resection instruments have significant shortcomings in the adaptation and coordination of these three core functions, making it difficult to meet the needs of complex surgeries.

[0003] In terms of cutting function, traditional surgical scissors and simple integrated instruments rely on manual operation by medical staff to open and close the cutting mechanism. Their structures are simple and lack auxiliary positioning. When dealing with small, fragile tumors in the liver and gallbladder, tissue adhesion, changes in body position, or uneven manual force application during the cutting process can easily lead to tumor displacement and slippage. This not only causes deviations in the resection area but may also damage surrounding normal liver and gallbladder tissue, blood vessels, and bile ducts, significantly increasing the risk of surgical complications. Furthermore, the entire opening and closing of the scissor arm requires manual maintenance of force, which can easily lead to hand fatigue over prolonged operation, further reducing the accuracy of the cutting action and resulting in extremely poor adaptability.

[0004] Regarding negative pressure adsorption, existing integrated negative pressure resection devices have two major drawbacks: First, most use independent power mechanisms such as external negative pressure pumps and built-in electric negative pressure components, resulting in large and complex instruments that cannot be adapted to small surgical scissors and are difficult to apply to deep and narrow hepatobiliary surgical areas. Furthermore, independent power sources pose a risk of malfunction, easily interrupting the surgical process. Second, the generation of negative pressure and the shearing action lack precise mechanical linkage, making it impossible to synchronize the adsorption timing and shearing rhythm. This results in either insufficient adsorption to fix tumor tissue or excessive adsorption that damages normal tissue, significantly reducing practicality. Some simpler instruments lack integrated negative pressure functionality, requiring additional suction equipment, increasing the number of instruments and the complexity of the operation, and also interfering with the shearing operation field of vision.

[0005] Crucially, current technologies generally neglect the need for blade cleaning during multiple shearing intervals, leaving a significant technological gap. Hepatobiliary tumor tissue is rich in mucus, and after multiple shearings, tissue debris, mucus, and residual tissue easily adhere to the blade edge. If these are not cleaned in time, it can lead to decreased blade adhesion and insufficient shearing force during subsequent shearings, and even tissue tearing and adhesion of the blade edge. This not only affects the resection effect but may also cause damage to surrounding tissues due to tearing. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a negative pressure tumor resection device for hepatobiliary surgery.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A negative pressure tumor resection device for hepatobiliary surgery includes a cutting assembly, a negative pressure generating assembly, and a blade rinsing assembly. The cutting assembly consists of a fixed handle, a fixed shear arm, a fixed blade, a movable handle, a movable shear arm, and a movable blade, and is used for cutting connective tissue and tumors. The fixed handle, fixed shear arm, and fixed blade are integrally connected. The movable shear arm is hollow and slidably sleeved on the outside of the fixed shear arm. The fixed handle and the movable handle are rotatably connected, and a first connecting rod is rotatably connected at the connection point. The other end of the first connecting rod is rotatably connected to a second connecting rod, and the other end of the second connecting rod is rotatably connected to the side wall of the movable shear arm. The negative pressure generating component consists of a negative pressure cylinder, a negative pressure groove, a negative pressure suction port, and a negative pressure conduit. It is used to generate negative pressure during shearing to adsorb connective tissue for easier shearing. The negative pressure cylinder is fixedly connected to the side wall of the movable shear arm. The negative pressure groove is opened in the end wall of the fixed shear arm. The negative pressure suction port is opened at the lower end of the fixed shear arm and communicates with the negative pressure groove. The negative pressure conduit is connected between the negative pressure cylinder and the negative pressure groove. A negative pressure mechanism for generating negative pressure is installed inside the negative pressure cylinder. A fixing mechanism for fixing the movable shear arm, the fixed shear arm, and the negative pressure mechanism is installed on the other side of the movable shear arm. The blade rinsing assembly consists of a pair of rinsing nozzles, a water storage tank, and a pump cylinder. It is used to rinse the fixed blade and the movable blade after shearing is completed. The pair of rinsing nozzles are symmetrically fixed on both sides of the end of the movable shear arm, and each end of the nozzle has an angled spray nozzle. The water storage tank is fixedly connected to the lower end of the movable shear arm. The pump cylinder is fixedly connected to the side wall of the movable shear arm and is on the same side as the negative pressure cylinder. A pumping mechanism for pumping rinsing water into the rinsing nozzles is installed inside the pump cylinder.

[0008] Preferably, the negative pressure mechanism includes a negative pressure piston, a negative pressure spring, a piston rod, and a connecting block. The negative pressure piston is slidably connected to the inner wall of the negative pressure cylinder. The negative pressure spring is elastically connected between the negative pressure piston and the inner wall of the negative pressure cylinder. One end of the piston rod is fixedly connected to the negative pressure piston, and the other end extends through to the outside of the negative pressure cylinder and is fixedly connected to the connecting block.

[0009] Preferably, the fixing mechanism includes a fixing pin, a fixing spring, and a pair of pin holes. The pair of pin holes are respectively opened on the side wall of the movable scissor arm and the side wall of the connecting block. The fixing pin is inserted into the pair of pin holes and its end is fixedly connected to an end head. The fixing spring is elastically connected to the end head and the side wall of the movable scissor arm. A control mechanism for controlling the insertion and removal of the fixing pin is installed on the side wall of the movable scissor arm.

[0010] Preferably, the control mechanism includes a miniature electric push rod, a sliding block, and a diagonal rod. The miniature electric push rod is fixedly connected to the side wall of the movable scissor arm. The side wall of the movable scissor arm is provided with a sliding groove. The sliding block is slidably connected in the sliding groove. One end of the diagonal rod is rotatably connected to the sliding block, and the other end is rotatably connected to the end.

[0011] Preferably, the pumping mechanism includes a pumping piston, a pumping impeller, a pumping rod, an inlet pipe, and an outlet pipe. The pumping piston is slidably and sealed within the inner wall of the pumping cylinder. The pumping impeller is rotatably connected to the top of the pumping cylinder. One end of the pumping rod is rotatably connected to the pumping impeller and eccentrically connected thereto, while the other end is rotatably connected to the pumping piston. The inlet pipe is connected between the pumping cylinder and the water storage cylinder. The outlet pipe is connected between the pumping cylinder and a pair of flushing nozzles. A drive mechanism for driving the pumping impeller to rotate in one direction is installed on the connecting block.

[0012] Preferably, the drive mechanism includes a gear and a rack. The gear is rotatably connected to the upper end of the pump cylinder and coaxially connected to the pump impeller via a one-way bearing. The rack is fixedly connected to the connecting block and meshes with the rack.

[0013] Preferably, the inlet pipe is equipped with a one-way valve that allows liquid to flow only from the water storage tank to the pump cylinder, and the outlet pipe is equipped with a one-way valve that allows liquid to flow only from the pump cylinder to the flushing nozzle.

[0014] Preferably, the movable shear arm is provided with a control button, which is electrically connected to the miniature electric actuator.

[0015] Preferably, a limit baffle is fixedly connected to the side wall of the movable shear arm between the negative pressure cylinder and the connecting block.

[0016] Preferably, a miniature air pump is fixedly installed at the upper end of the negative pressure cylinder near the connecting block, and the miniature air pump is connected to the end of the negative pressure cylinder near the connecting block through a pumping pipe.

[0017] The present invention has the following beneficial effects: 1. This invention utilizes an integrated drive transmission mechanism to synchronize the opening and closing of the movable scissor arm with the reciprocating motion of the piston. When the movable scissor arm opens, it automatically generates negative pressure, which stably fixes the tumor tissue within the cutting opening through the targeted adsorption port. This fundamentally solves the problem of easy displacement and slippage of tumor tissue in the prior art, effectively avoiding deviations in the resection range and damage to surrounding normal liver and gallbladder tissue and blood vessels. At the same time, it eliminates the need for an external negative pressure power mechanism, simplifying the structure while adapting to small surgical scissor specifications. This can meet the surgical needs of deep and narrow surgical areas, reduce the risk of equipment failure, and ensure the continuity of surgery.

[0018] 2. This invention can clean the blade during multiple shearing intervals without the need for an additional external liquid storage and pump structure, or by pausing the core surgical procedure. It solves the problems of insufficient shearing force and tissue tearing caused by tissue mucus and debris adhering to the blade in the prior art, and avoids the drawbacks of the irrigation fluid spreading and blurring the field of vision and prolonging the operation time. It ensures that the blade edge remains clean and sharp with each shearing, improves shearing efficiency and effect, and reduces surgical trauma.

[0019] 3. This invention, through the setting of a miniature electric push rod and a miniature air pump, can realize the automated control of negative pressure generation and structural repositioning of the device, significantly reducing the manual operation intensity of medical staff, completely relieving hand fatigue during long-term surgery, and reducing medical staff's contact with the resection device components, avoiding hand contamination of instruments. With the hollow connecting rod and detachable structure, it is convenient to carry out comprehensive flushing and cleaning of the tubing, cutting edge and the area around the automated components after surgery, reducing the risk of cross-infection from both operation and cleaning aspects, effectively meeting the strict aseptic requirements of hepatobiliary surgery, and adapting to various complex surgical scenarios. Attached Figure Description

[0020] Figure 1 This is a front view of a negative pressure tumor resection device for hepatobiliary surgery proposed in this invention. Figure 2 This is a schematic diagram of the back structure of a negative pressure tumor resection device for hepatobiliary surgery proposed in this invention; Figure 3 This is a schematic diagram of the integrated connection of the fixed handle, fixed shear arm and fixed blade proposed in this invention; Figure 4 The present invention includes a movable handle, a movable shear arm, and a movable blade; a connection diagram is also provided. Figure 5 This is a cross-sectional view of the end of the fixed shear arm proposed in this invention; Figure 6 This is a schematic diagram showing the connection between the negative pressure mechanism and the fixing mechanism proposed in this invention; Figure 7 This is a schematic diagram of the blade rinsing assembly proposed in this invention; Figure 8 This is a schematic diagram showing the connection between the pump mechanism and the gear proposed in this invention; Figure 9 This is a schematic diagram showing the connection between the air pump and the negative pressure cylinder proposed in this invention.

[0021] In the diagram: 1. Fixed handle; 2. Fixed shear arm; 3. Fixed blade; 4. Movable handle; 5. Movable shear arm; 6. Movable blade; 7. First connecting rod; 8. Second connecting rod; 9. Negative pressure cylinder; 10. Rack; 11. Miniature electric actuator; 12. Sliding block; 13. End; 14. Diagonal rod; 15. Sliding groove; 16. Pin hole; 17. Negative pressure groove; 18. Negative pressure suction port; 19. Negative pressure conduit; 20. 21. Rinsing nozzle; 22. Fixing pin; 23. Fixing spring; 24. Negative pressure piston; 25. Negative pressure spring; 26. Piston rod; 27. Connecting block; 28. Limiting baffle; 29. ​​Water storage tank; 30. Gear; 31. Pump cylinder; 32. Inlet pipe; 33. Outlet pipe; 34. Angled spray nozzle; 35. Pump impeller; 36. Pump rod; 37. Pump piston; 38. Miniature air pump; 39. Air pump pipe. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1 Reference Figure 1-6 A negative pressure tumor resection device for hepatobiliary surgery includes a shearing assembly and a negative pressure generating assembly. The shearing assembly consists of a fixed handle 1, a fixed shear arm 2, a fixed blade 3, a movable handle 4, a movable shear arm 5, and a movable blade 6, and is used for shearing connective tissue and tumors. The fixed handle 1, the fixed shear arm 2, and the fixed blade 3 are integrated and connected. The movable shear arm 5 is hollow and slidably sleeved on the outside of the fixed shear arm 2. The fixed handle 1 and the movable handle 4 are rotatably connected, and a first connecting rod 7 is also rotatably connected at the connection point. The other end of the first connecting rod 7 is rotatably connected to a second connecting rod 8, and the other end of the second connecting rod 8 is rotatably connected to the side wall of the movable shear arm 5.

[0024] The negative pressure generating component consists of a negative pressure cylinder 9, a negative pressure groove 17, a negative pressure suction port 18, and a negative pressure conduit 19. It is used to generate negative pressure during shearing to adsorb connective tissue for easy shearing. The negative pressure cylinder 9 is fixedly connected to the side wall of the movable shear arm 5. The negative pressure groove 17 is opened in the end wall of the fixed shear arm 2. The negative pressure suction port 18 is opened at the lower end of the fixed shear arm 2 and communicates with the negative pressure groove 17. The negative pressure conduit 19 is connected and arranged between the negative pressure cylinder 9 and the negative pressure groove 17. A negative pressure mechanism for generating negative pressure is installed inside the negative pressure cylinder 9. A fixing mechanism for fixing the movable shear arm 5, the fixed shear arm 2, and the negative pressure mechanism is installed on the other side of the movable shear arm 5.

[0025] The negative pressure mechanism includes a negative pressure piston 23, a negative pressure spring 24, a piston rod 25, and a connecting block 26. The negative pressure piston 23 is slidably connected to the inner wall of the negative pressure cylinder 9. The negative pressure spring 24 is elastically connected between the negative pressure piston 23 and the inner wall of the negative pressure cylinder 9. One end of the piston rod 25 is fixedly connected to the negative pressure piston 23, and the other end extends through to the outside of the negative pressure cylinder 9 and is fixedly connected to the connecting block 26.

[0026] The fixing mechanism includes a fixing pin 21, a fixing spring 22, and a pair of pin holes 16. The pair of pin holes 16 are respectively opened on the side wall of the movable scissor arm 5 and the side wall of the connecting block 26. The fixing pin 21 is inserted into the pair of pin holes 16 and its end is fixedly connected to the end head 13. The fixing spring 22 is elastically connected to the end head 13 and the side wall of the movable scissor arm 5. A control mechanism for controlling the insertion and removal of the fixing pin 21 is installed on the side wall of the movable scissor arm 5.

[0027] The control mechanism includes a miniature electric push rod 11, a sliding block 12, and a diagonal rod 14. The miniature electric push rod 11 is fixedly connected to the side wall of the movable shear arm 5. The side wall of the movable shear arm 5 is provided with a sliding groove 15. The sliding block 12 is slidably connected in the sliding groove 15. One end of the diagonal rod 14 is rotatably connected to the sliding block 12, and the other end is rotatably connected to the end 13.

[0028] The movable shear arm 5 is equipped with a control button, which is electrically connected to the miniature electric push rod 11. A limit baffle 27 is fixedly connected to the side wall of the movable shear arm 5 between the negative pressure cylinder 9 and the connecting block 26.

[0029] In this embodiment, during the surgical procedure, the medical staff holds the fixed handle 1 and the movable handle 4, aligns the fixed blade 3 and the movable blade 6 with the target tumor tissue area, and then presses the control button on the movable scissor arm 5. The micro electric push rod 11 is activated and pushes the sliding block 12 to slide along the sliding groove 15. The sliding block 12 pulls the end 13 through the push rod 14, so that the fixed pin 21 overcomes the elastic force of the fixed spring 22 and is pulled out from a pair of pin holes 16, releasing the fixation restriction on the connecting block 26 and the movable scissor arm 5.

[0030] At this time, the negative pressure spring 24 releases its elastic potential energy, pushing the negative pressure piston 23 to slide inside the negative pressure cylinder 9. This energy is then transmitted to the negative pressure suction port 18 through the negative pressure conduit 19 and the negative pressure groove 17, causing the negative pressure suction port 18 to generate negative pressure. Since the negative pressure spring 24 releases its potential energy instantaneously, and the diameter of the negative pressure conduit 19 is relatively small, the negative pressure suction port 18 will remain in a negative pressure adsorption state for a period of time.

[0031] Medical staff push the movable handle 4, which rotates around its connection with the fixed handle 1. Through the transmission action of the first link 7 and the second link 8, the movable shear arm 5 slides along the fixed shear arm 2, causing the movable blade 6 to move closer to the fixed blade 3, thus preparing for the shearing action. The suction force of the negative pressure suction port 18 adsorbs and fixes the target tumor tissue between the fixed blade 3 and the movable blade 6, preventing tissue displacement or slippage.

[0032] It should be noted that, firstly, the negative pressure suction port 18 is located at the lower end of the fixed shear arm 2, and corresponds to the position of the cutting edge of the fixed blade 3. The shearing trajectory of the fixed blade 3 and the movable blade 6 is a preset precise engagement path, and the suction range of the negative pressure suction port 18 is strictly limited to the area directly in front of the shearing trajectory, ensuring that the suction target and the cutting area completely overlap.

[0033] Secondly, when the movable scissor arm 5 opens to prepare for cutting, the negative pressure spring 24 releases potential energy, driving the negative pressure piston 23 to slide and generate negative pressure. The negative pressure suction port 18 generates suction force. At this time, the movable blade 6 has not yet approached the fixed blade 3. Medical staff can finely adjust the position of the scissor arm through the handle to ensure that the dividing line falls precisely into the suction range before driving the movable blade 6 to approach and cut.

[0034] Finally, if a deviation in the adsorption position is found, medical staff can activate the miniature electric push rod 11 through the control button to lock the movable scissor arm 5. At this time, the negative pressure can be released by the miniature air pump 37 to release the incorrectly adsorbed tissue position, making it convenient to readjust and continue the operation.

[0035] After confirming precise adsorption, medical staff continue to operate the movable handle 4, driving the movable blade 6 to precisely engage with the fixed blade 3, completing the shearing of the tumor tissue. After shearing, the connecting block 26 can be pulled by external force, causing the piston rod 25 and the negative pressure piston 23 to reset, compressing the negative pressure spring 24 to prepare for the next generation of negative pressure. At this time, the control button is turned off, the micro electric push rod 11 resets, and the fixed spring 22 pushes the fixed pin 21 to re-insert into the pin hole 16, fixing the position of the connecting block 26, the movable shear arm 5, and the negative pressure mechanism. At the same time, the limiting baffle 27 can limit the sliding stroke of the connecting block 26, preventing excessive movement of the negative pressure piston 23 that could damage the mechanism and ensuring the stability of the device operation.

[0036] Example 2 Reference Figure 6-8A negative pressure tumor resection device for hepatobiliary surgery, which differs from Embodiment 1 in that it also includes a blade flushing assembly. The blade flushing assembly consists of a pair of flushing nozzles 20, a water storage tank 28, and a pump cylinder 30, which is used to flush the fixed blade 3 and the movable blade 6 after the cutting is completed. The pair of flushing nozzles 20 are symmetrically fixed on both sides of the end of the movable shear arm 5, and each end of the nozzle has an angled spray nozzle 33. The water storage tank 28 is fixedly connected to the lower end of the movable shear arm 5. The pump cylinder 30 is fixedly connected to the side wall of the movable shear arm 5 and is on the same side as the negative pressure cylinder 9. A pumping mechanism for pumping flushing water into the flushing nozzles 20 is installed inside the pump cylinder 30.

[0037] The water pumping mechanism includes a pumping piston 36, a pumping impeller 34, a pumping rod 35, an inlet pipe 31, and an outlet pipe 32. The pumping piston 36 is slidably connected to the inner wall of the pumping cylinder 30. The pumping impeller 34 is rotatably connected to the top of the pumping cylinder 30. One end of the pumping rod 35 is rotatably connected to the pumping impeller 34 and eccentrically connected to it, and the other end is rotatably connected to the pumping piston 36. The inlet pipe 31 is connected between the pumping cylinder 30 and the water storage tank 28. The outlet pipe 32 is connected between the pumping cylinder 30 and a pair of flushing nozzles 20. A drive mechanism for driving the pumping impeller 34 to rotate in one direction is installed on the connecting block 26.

[0038] The drive mechanism includes a gear 29 and a rack 10. The gear 29 is rotatably connected to the upper end of the pump cylinder 30 and is coaxially connected to the pump impeller 34 through a one-way bearing. The rack 10 is fixedly connected to the connecting block 26 and meshes with the rack 10.

[0039] The inlet pipe 31 is equipped with a one-way valve that allows liquid to flow only from the water storage tank 28 to the pump cylinder 30, and the outlet pipe 32 is equipped with a one-way valve that allows liquid to flow only from the pump cylinder 30 to the flushing nozzle 20.

[0040] In this embodiment, the surgical cutting process is the same as in Embodiment 1. Since gear 29 and pump wheel 34 are coaxially connected through a one-way bearing, gear 29 drives pump wheel 34 to rotate in one direction. Therefore, when rack 10 drives gear 29 to rotate in the forward direction before cutting, gear 29 idles and does not drive pump wheel 34, and the pumping mechanism is in a non-working state.

[0041] When the blade is rinsed after the cutting is completed, the medical staff pulls the connecting block 26 to drive the piston rod 25 and the negative pressure piston 23 to reset. At the same time, the connecting block 26 drives the rack 10 to move. The rack 10 meshes with the gear 29 to drive the gear 29 to rotate in the opposite direction, which in turn drives the pump wheel 34 to rotate in the opposite direction.

[0042] When the pump impeller 34 rotates, its eccentrically connected pump rod 35 pulls the pump piston 36 to slide back and forth inside the pump cylinder 30. When the pump piston 36 moves away from the pump impeller 34, a negative pressure is formed inside the pump cylinder 30. Under the action of the negative pressure, the flushing water in the water storage tank 28 opens the one-way valve in the inlet pipe 31 and flows into the pump cylinder 30. When the pump piston 36 moves closer to the pump impeller 34, the pressure inside the pump cylinder 30 increases, pushing the flushing water to open the one-way valve in the outlet pipe 32. The flushing water is then delivered to a pair of flushing nozzles 20 through the outlet pipe 32. Finally, the flushing water is precisely sprayed towards the cutting edges of the fixed blade 3 and the movable blade 6 through the angled spray nozzles 33 at the end of the flushing nozzles 20, quickly rinsing away tissue debris, mucus and residual tissue attached to the cutting edges.

[0043] The one-way valves in the inlet pipe 31 and outlet pipe 32 ensure that the flushing water flows in one direction, avoiding backflow and ensuring pump efficiency and flushing effect. The blade can be cleaned during the shearing interval without having to stop the operation or add an external pump. This ensures the cleanliness and sharpness of the blade in subsequent shearing actions, improving the continuity of the operation and the precision of the shearing.

[0044] Example 3 Reference Figure 9 A negative pressure tumor resection device for hepatobiliary surgery, which differs from embodiments 1 and 2 in that a miniature air pump 37 is fixedly installed at the upper end of the negative pressure cylinder 9 near the connecting block 26, and the miniature air pump 37 is connected to the end of the negative pressure cylinder 9 near the connecting block 26 through the air pump pipe 38.

[0045] In this embodiment, the surgical cutting and blade rinsing process is consistent with that in Embodiment 2, with the key difference being that the reset method of the negative pressure mechanism is more automated.

[0046] After the shearing and rinsing operations are completed, medical staff do not need to use external force to pull the connecting block 26 to reset the negative pressure piston 23. They only need to start the micro air pump 37. The micro air pump 37 injects gas into the end of the negative pressure cylinder 9 near the connecting block 26 through the air pump pipe 38. The gas pressure pushes the negative pressure piston 23 to slide away from the connecting block 26, which simultaneously drives the piston rod 25 and the connecting block 26 to reset, so that the negative pressure spring 24 is compressed and stored, preparing for the next generation of negative pressure.

[0047] After the negative pressure piston 23 returns to the preset position, turn off the control button, the micro electric push rod 11 returns to its original position, and the fixing spring 22 pushes the fixing pin 21 to re-insert into the pin hole 16, thus completing the position fixing of the connecting block 26, the movable shear arm 5 and the negative pressure mechanism.

[0048] The miniature air pump 37 further reduces the manual operation steps for medical staff, reduces hand fatigue, and avoids the mechanism displacement that may be caused by manually pulling the connecting block 26, thereby improving the stability and ease of operation of the device. It is especially suitable for complex hepatobiliary surgical scenarios involving long-term, high-frequency shearing operations.

[0049] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A negative pressure tumor resection device for hepatobiliary surgery, comprising a shearing assembly, a negative pressure generating assembly, and a blade flushing assembly, characterized in that: The shearing assembly consists of a fixed handle (1), a fixed shear arm (2), a fixed blade (3), a movable handle (4), a movable shear arm (5), and a movable blade (6), and is used for shearing connective tissue and tumors. The fixed handle (1), the fixed shear arm (2), and the fixed blade (3) are integrated and connected. The movable shear arm (5) is hollow and is slidably sleeved on the outside of the fixed shear arm (2). The fixed handle (1) and the movable handle (4) are rotatably connected, and a first connecting rod (7) is also rotatably connected at the connection point. The other end of the first connecting rod (7) is rotatably connected to a second connecting rod (8), and the other end of the second connecting rod (8) is rotatably connected to the side wall of the movable shear arm (5). The negative pressure generating component consists of a negative pressure cylinder (9), a negative pressure groove (17), a negative pressure suction port (18), and a negative pressure conduit (19). It is used to generate negative pressure during shearing to adsorb connective tissue for easy shearing. The negative pressure cylinder (9) is fixedly connected to the side wall of the movable shear arm (5). The negative pressure groove (17) is opened in the end wall of the fixed shear arm (2). The negative pressure suction port (18) is opened at the lower end of the fixed shear arm (2) and communicates with the negative pressure groove (17). The negative pressure conduit (19) is connected and arranged between the negative pressure cylinder (9) and the negative pressure groove (17). A negative pressure mechanism for generating negative pressure is installed inside the negative pressure cylinder (9). A fixing mechanism for fixing the movable shear arm (5), the fixed shear arm (2), and the negative pressure mechanism is installed on the other side of the movable shear arm (5). The blade rinsing assembly consists of a pair of rinsing nozzles (20), a water storage tank (28), and a pump cylinder (30), used to rinse the fixed blade (3) and the movable blade (6) when the shearing is completed. The pair of rinsing nozzles (20) are symmetrically fixed on both sides of the end of the movable shear arm (5), and each end of the nozzle has an angled spray nozzle (33). The water storage tank (28) is fixedly connected to the lower end of the movable shear arm (5), and the pump cylinder (30) is fixedly connected to the side wall of the movable shear arm (5) and on the same side as the negative pressure cylinder (9). The pump cylinder (30) is equipped with a pumping mechanism for pumping rinsing water into the rinsing nozzles (20).

2. The negative pressure tumor resection device for hepatobiliary surgery according to claim 1, characterized in that: The negative pressure mechanism includes a negative pressure piston (23), a negative pressure spring (24), a piston rod (25), and a connecting block (26). The negative pressure piston (23) is slidably connected to the inner wall of the negative pressure cylinder (9). The negative pressure spring (24) is elastically connected between the negative pressure piston (23) and the inner wall of the negative pressure cylinder (9). One end of the piston rod (25) is fixedly connected to the negative pressure piston (23), and the other end extends through to the outside of the negative pressure cylinder (9) and is fixedly connected to the connecting block (26).

3. The negative pressure tumor resection device for hepatobiliary surgery according to claim 2, characterized in that: The fixing mechanism includes a fixing pin (21), a fixing spring (22), and a pair of pin holes (16). The pair of pin holes (16) are respectively opened on the side wall of the movable scissor arm (5) and the side wall of the connecting block (26). The fixing pin (21) is inserted into the pair of pin holes (16) and its end is fixedly connected to an end head (13). The fixing spring (22) is elastically connected to the end head (13) and the side wall of the movable scissor arm (5). A control mechanism for controlling the insertion and removal of the fixing pin (21) is installed on the side wall of the movable scissor arm (5).

4. A negative pressure tumor resection device for hepatobiliary surgery according to claim 3, characterized in that: The control mechanism includes a miniature electric push rod (11), a sliding block (12), and a diagonal rod (14). The miniature electric push rod (11) is fixedly connected to the side wall of the movable shear arm (5). The side wall of the movable shear arm (5) is provided with a sliding groove (15). The sliding block (12) is slidably connected in the sliding groove (15). One end of the diagonal rod (14) is rotatably connected to the sliding block (12), and the other end is rotatably connected to the end (13).

5. A negative pressure tumor resection device for hepatobiliary surgery according to claim 2, characterized in that: The pumping mechanism includes a pumping piston (36), a pumping wheel (34), a pumping rod (35), an inlet pipe (31), and an outlet pipe (32). The pumping piston (36) is sealed and slidably connected to the inner wall of the pumping cylinder (30). The pumping wheel (34) is rotatably connected to the top of the pumping cylinder (30). One end of the pumping rod (35) is rotatably connected to the pumping wheel (34) and eccentrically connected to it, and the other end is rotatably connected to the pumping piston (36). The inlet pipe (31) is connected between the pumping cylinder (30) and the water storage cylinder (28). The outlet pipe (32) is connected between the pumping cylinder (30) and a pair of flushing nozzles (20). A drive mechanism for driving the pumping wheel (34) to rotate in one direction is installed on the connecting block (26).

6. A negative pressure tumor resection device for hepatobiliary surgery according to claim 5, characterized in that: The drive mechanism includes a gear (29) and a rack (10). The gear (29) is rotatably connected to the upper end of the pump cylinder (30) and coaxially connected to the pump impeller (34) through a one-way bearing. The rack (10) is fixedly connected to the connecting block (26) and meshes with the rack (10).

7. A negative pressure tumor resection device for hepatobiliary surgery according to claim 5, characterized in that: The inlet pipe (31) is equipped with a one-way valve that allows liquid to flow only from the water storage tank (28) to the pump cylinder (30), and the outlet pipe (32) is equipped with a one-way valve that allows liquid to flow only from the pump cylinder (30) to the flushing nozzle (20).

8. A negative pressure tumor resection device for hepatobiliary surgery according to claim 7, characterized in that: The movable shear arm (5) is equipped with a control button, which is electrically connected to the miniature electric push rod (11).

9. A negative pressure tumor resection device for hepatobiliary surgery according to claim 8, characterized in that: A limit baffle (27) is fixedly connected to the side wall of the movable shear arm (5) between the negative pressure cylinder (9) and the connecting block (26).

10. A negative pressure tumor resection device for hepatobiliary surgery according to claim 9, characterized in that: A micro air pump (37) is fixedly installed at the upper end of the negative pressure cylinder (9) near the connecting block (26). The micro air pump (37) is connected to the end of the negative pressure cylinder (9) near the connecting block (26) through the air pump pipe (38).

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