A prosthesis removal device for knee revision surgery based on high-frequency electrosurgical unit

Abstract

This invention provides a prosthesis removal device for knee replacement revision surgery based on a high-frequency electrosurgical unit, belonging to the field of medical device technology. It includes a high-frequency electrosurgical pen tip, with a high-frequency electrosurgical pen body fixedly connected to the top of the tip. A connecting plate is located at the top of the pen body, and a first negative pressure tube is mounted on the connecting plate, passing through it. A fixing cap is threadedly connected to the top of the pen body, movably sleeved with the first negative pressure tube, and positioned at the top of the pen body and fitting against the connecting plate. The bottom end of the first negative pressure tube extends to the outside of the bottom end of the pen body, and a suction component is located at the lower end of the tube. This invention uses the high-frequency electrosurgical pen tip to heat and melt the bone cement in the prosthesis, reducing the difficulty of removing the main bone from the prosthesis and lowering the requirements for operator experience and skill. The suction component absorbs the melted bone cement.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit. Background Technology

[0002] With the accelerating aging of the population and the increase in sports injuries, total knee replacement surgery has become the standard surgery for treating end-stage knee joint diseases (such as severe osteoarthritis, rheumatoid arthritis, etc.). However, revision surgery is an inevitable issue after the initial replacement. In current clinical practice, most knee prostheses are fixed with bone cement. Bone cement, as a filling material, forms a mechanical interlocking layer between the prosthesis and the host bone, providing immediate and stable fixation. However, in revision surgery, this strong fixation becomes a "double-edged sword." In order to remove the prosthesis, the surgeon must break the interface between the prosthesis, bone cement, and bone.

[0003] In existing technologies, the most widely used basic method in knee revision surgery is mechanical transection and manipulation. The specific operation process is as follows: During the operation, the joint cavity is fully exposed, hyperplastic synovium and scar tissue are removed, and the polyethylene gasket is taken out. Then, a series of special instruments are used, such as bone scalpels, thin oscillating saws, wire saws, Gigli saws, and various sizes of bone chisels and hammers. The surgeon first needs to use the oscillating saw or bone scalpel to attempt artificial and mechanical separation at the prosthesis-bone cement interface or bone cement-bone interface. Through precise tapping and prying, the interface gap is gradually widened, and finally the prosthesis is loosened and removed. For prostheses with medullary stems, special long-handled bone scalpels or ultrasonic equipment are also needed to treat the bone cement around the stem. The core of this technique is to rely on mechanical force for hard separation, and its effectiveness is highly dependent on the surgeon's experience, feel, and control over the instruments.

[0004] Mechanical methods rely on physical prying and striking, making it difficult to precisely control the transmission of force. This results in a high risk of host bone damage during prosthesis removal and excessive reliance on the surgeon's experience. It also makes the procedure of peeling off the main bone of the prosthesis patient quite difficult. Therefore, this invention provides a prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit. By setting the high-frequency electrosurgical pen tip to heat the prosthesis and then heat-melt the bone cement, the above-mentioned setup can solve the problem of the high difficulty of the operation of dissecting the main bone of the prosthesis patient.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit includes a high-frequency electrosurgical pen tip. A high-frequency electrosurgical pen body is fixedly connected to the top of the tip. A connecting plate is provided at the top of the pen body, and a first negative pressure tube is mounted on the connecting plate, passing through it. A fixing cap is threadedly connected to the top of the pen body, movably sleeved with the first negative pressure tube. The fixing cap is located at the top of the pen body and fits against the connecting plate. The bottom end of the first negative pressure tube extends to the outside of the bottom end of the pen body. A suction component is provided at the lower end of the first negative pressure tube, used to suction the bone cement melted by the high-frequency electrosurgical pen tip through heating the prosthesis.

[0008] Optionally, the suction assembly includes a first connecting sleeve that is movably engaged with the first negative pressure tube located outside the body of the high-frequency electrosurgical pen. The second negative pressure tube is connected to the first negative pressure tube through the first connecting sleeve. A ball table is fixedly connected to the bottom end of the second negative pressure tube. A ball head is movably engaged inside the ball table. One end of the ball head extending out of the ball table is connected to a third negative pressure tube. A second connecting sleeve is movably engaged to the bottom end of the third negative pressure tube. A fourth negative pressure tube is connected to the third negative pressure tube through the second connecting sleeve. The bottom end of the fourth negative pressure tube is connected to a negative pressure tube head through a corrugated negative pressure tube.

[0009] Optionally, the outer walls of the bottom ends of the first negative pressure pipe and the third negative pressure pipe are provided with a plurality of annularly distributed limiting slots and guide slots. The inner walls of the first connecting sleeve and the second connecting sleeve are fixedly connected with a plurality of annularly distributed limiting blocks and guide blocks. The limiting blocks are movably engaged with the limiting slots, and the guide blocks are slidably connected in the guide slots.

[0010] Optionally, the outer walls of both the first connecting sleeve and the second connecting sleeve are fixedly connected with a number of anti-slip ridges.

[0011] Optionally, an electric knife wire is fixedly connected to the side wall of the high-frequency electric knife pen body, the electric knife wire is electrically connected to the high-frequency electric knife pen tip, a plurality of anti-slip rods are fixedly connected to the outer wall of the fixing cap, a fixing ring is sleeved on the outer wall of the first negative pressure tube, the fixing ring is located in the high-frequency electric knife pen body, and the high-frequency electric knife pen body limits the fixing ring.

[0012] Optionally, the high-frequency electrosurgical pen tip is a curved rod shape, the high-frequency electrosurgical pen tip is located in the middle of the bottom end of the high-frequency electrosurgical pen body, the high-frequency electrosurgical pen tip is bent towards the outer wall of the high-frequency electrosurgical pen body, and the second negative pressure tube is a curved tube.

[0013] Optionally, a heat-conducting ball is installed at the bottom end of the high-frequency electrosurgical pen tip, the diameter of the high-frequency electrosurgical pen tip is smaller than the diameter of the heat-conducting ball, and the heat-conducting ball is located below the outer wall of the high-frequency electrosurgical pen body.

[0014] Optionally, the bottom end of the negative pressure tube head is fixedly connected to a sphere with a hole in the middle.

[0015] Optionally, a digging rod is fixedly connected to one end of the negative pressure pipe head, and a digging spoon is fixedly connected to one end of the digging rod. A groove is opened on one side of the digging spoon, and a limiting hole and a protective hole are respectively opened at the upper and lower ends of one side of the digging spoon. The groove, the limiting hole and the protective hole are connected. The length of the protective hole is greater than the length of the limiting hole. The groove is located below the heat-conducting ball, and the limiting hole fits with the prosthesis.

[0016] Optionally, reinforcing ribs are fixedly connected to both sides of the excavator rod, and the reinforcing ribs are fixedly connected to the negative pressure pipe head. The reinforcing ribs are triangular.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, by aligning the end of the high-frequency electrosurgical pen tip with the prosthesis above the interface between the prosthesis and the bone cement, the high-frequency electrosurgical pen tip heats the prosthesis and melts the bone cement located between the prosthesis and the host bone, so that the bone cement at that point is in a molten state, reducing the adhesion strength between the prosthesis and the host bone. This facilitates the subsequent separation of the prosthesis from the patient's main bone using other medical instruments, thereby reducing the operational experience and technical requirements and improving the ease of operation.

[0019] By setting up an aspiration component that picks up the molten bone cement, the operator can easily observe the amount of bone cement between the prosthesis and the host bone, and thus determine whether to continue heating the bone cement. This helps reduce the number of heating cycles and avoids damage to the host bone from repeated or prolonged heating. It also prevents a large amount of molten bone cement from falling onto the host bone, reducing the difficulty of subsequent bone cement cleaning operations.

[0020] By setting up a third negative pressure tube, a second connecting sleeve, a fourth negative pressure tube, a corrugated negative pressure tube, and a ball head for easy disassembly of the second connecting sleeve, the fourth negative pressure tube, the corrugated negative pressure tube, and the ball head, facilitating future replacement. The ball head allows for angle adjustment and has a certain interference fit, which fixes the relative position after angle adjustment. The corrugated tube can adjust the relative distance between the fourth negative pressure tube and the ball head, facilitating the adjustment of the position of the ball head to the bone cement. By adjusting the angle of the ball head and the length of the ball head and the fourth negative pressure tube, it is possible to effectively absorb the heat-fused bone cement and increase the adaptability of the prosthesis during removal for different patients.

[0021] By setting up a digging rod and a digging spoon, a certain amount of the heat-fused bone cement located between the prosthesis and the host bone can be further scraped away, making it easier for the suction component to pick up the cement and for the operator to observe the amount of bone cement located between the prosthesis and the host bone.

[0022] When the high-frequency electrosurgical pen body is moved, the negative pressure tube head and the digging spoon are also moved. The digging spoon digs out the molten bone cement, which makes the bone cement absorption effect better. The front end of the digging spoon can be embedded in the bone cement to dig deeper into the bone cement, which improves the absorption effect of the negative pressure tube head on the bone cement. The fitting of the limiting hole with the prosthesis limits the embedding depth of the digging groove and avoids the digging spoon from damaging the host bone.

[0023] Before use, the guide groove restricts the movement of the first and second connecting sleeves by the guide block, ensuring the engagement of the limit slot and the limit block. This ensures that the first connecting sleeve and the first negative pressure pipe, as well as the second connecting sleeve and the third negative pressure pipe, can be successfully engaged in one go, making operation convenient. It also allows the suction component to be quickly disassembled and replaced after operation, making it easy to use. Attached Figure Description

[0024] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0025] Figure 1 A three-dimensional structural diagram of a prosthesis removal device for knee replacement revision surgery based on a high-frequency electrosurgical unit;

[0026] Figure 2 A schematic diagram of a partial cross-section of the high-frequency electrosurgical pen body;

[0027] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the second negative pressure pipe;

[0028] Figure 4 A schematic diagram of the connection structure of the corrugated negative pressure pipe, the negative pressure pipe head, and the excavator rod;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure connecting the digging rod, digging spoon, and reinforcing ribs.

[0030] Figure label:

[0031] 1. High-frequency electrosurgical tip; 2. High-frequency electrosurgical body; 3. Heat-conducting ball; 4. First negative pressure tube; 5. Connecting plate; 6. Fixing cap; 7. Electrosurgical wire; 8. Fixing ring; 9. Limiting slot; 10. Limiting block; 11. Guide groove; 12. Guide block; 13. First connecting sleeve; 14. Second negative pressure tube; 15. Ball table; 16. Ball head; 17. Third negative pressure tube; 18. Second connecting sleeve; 19. Fourth negative pressure tube; 20. Corrugated negative pressure tube; 21. Negative pressure tube head; 22. Digging rod; 23. Digging spoon; 24. Reinforcing rib; 25. Digging groove; 26. Limiting hole; 27. Protective hole.

[0032] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0033] The following is a detailed description of a prosthesis removal device for knee joint revision surgery based on a high-frequency electrosurgical unit, provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0034] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0035] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0036] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0037] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0038] like Figures 1 to 5As shown, an embodiment of the present invention provides a prosthesis removal device for knee joint revision surgery based on a high-frequency electrosurgical unit, including a high-frequency electrosurgical pen tip 1. A high-frequency electrosurgical pen body 2 is fixedly connected to the top of the high-frequency electrosurgical pen tip 1, such that the position of the high-frequency electrosurgical pen tip 1 is fixed by the high-frequency electrosurgical pen body 2. A connecting plate 5 is provided at the top of the high-frequency electrosurgical pen body 2, and a first negative pressure tube 4 is installed on the connecting plate 5, passing through the connecting plate 5. A fixing cap 6 is threadedly connected to the top of the high-frequency electrosurgical pen body 2, and the fixing cap 6 is movably sleeved with the first negative pressure tube 4, that is, the top of the first negative pressure tube 4 passes through the fixing cap 6. The fixing cap 6 is located at the top of the high-frequency electrosurgical pen body 2 and fits against the connecting plate 5, thereby connecting the high-frequency electrosurgical pen body 2 and the fixing cap 6. The position of the connecting plate 5 is then fixed to the position of the first negative pressure tube 4, making it easy to disassemble and replace. The bottom end of the first negative pressure tube 4 extends to the outside of the bottom end of the high-frequency electrosurgical pen body 2. A suction component is provided at the lower end of the first negative pressure tube 4. The suction component is used to suction the bone cement that has been melted by the high-frequency electrosurgical pen tip 1 through heating the prosthesis. The operator sets the working mode of the high-frequency electrosurgical host connected to the high-frequency electrosurgical pen tip 1 to "pure electrocoagulation" mode and sets the output power parameter to seventy watts (this parameter can ensure effective melting of bone cement while avoiding excessive heat diffusion that could damage the host bone). Then, the operator aligns the end of the high-frequency electrosurgical pen tip 1 with the interface between the prosthesis and the bone cement. The prosthesis allows the high-frequency electrosurgical tip 1 to heat and melt the bone cement, reducing the adhesion between the prosthesis and the host bone. This facilitates subsequent detachment of the prosthesis from the patient's main bone using other medical instruments, lowering the skill and experience requirements and improving ease of operation. A suction component removes the melted bone cement, allowing the operator to easily observe the amount of cement between the prosthesis and the host bone, determining whether to continue heating. This reduces the number of heating cycles and avoids damage to the host bone from repeated or prolonged heating. It also prevents large amounts of melted bone cement from falling onto the host bone, reducing the difficulty of subsequent cleaning. The component includes a first connecting sleeve 13 that is movably engaged with a first negative pressure tube 4 located outside the body 2 of the high-frequency electrosurgical pen. The inner wall of the first connecting sleeve 13 is fitted over a second negative pressure tube 14. The second negative pressure tube 14 is connected to the first negative pressure tube 4 through the first connecting sleeve 13. A ball table 15 is fixedly connected to the bottom end of the second negative pressure tube 14. A ball head 16 is movably engaged inside the ball table 15. The second negative pressure tube 14 and the ball head 16 are connected through the ball table 15. A third negative pressure tube 17 is fixedly connected to one end of the ball head 16 extending out of the ball table 15. A second connecting sleeve 18 is movably engaged at the bottom end of the third negative pressure tube 17. A fourth negative pressure tube 19 is fixedly connected to the inner wall of the second connecting sleeve 18. The fourth negative pressure tube 19 and the third negative pressure tube 17 are connected through the second connecting sleeve 18.The bottom end of the fourth negative pressure pipe 19 is fixedly connected to the negative pressure pipe head 21 via the corrugated negative pressure pipe 20, so that the first negative pressure pipe 4 fixes the position of the second negative pressure pipe 14 through the first connecting sleeve 13, so that the second negative pressure pipe 14 restricts the position of the ball head 16 through the ball table 15, thereby restricting the position of the third negative pressure pipe 17 connected to the ball head 16, so that the third negative pressure pipe 17 restricts the position of the fourth negative pressure pipe 19, the corrugated negative pressure pipe 20 and the negative pressure pipe head 21 through the second connecting sleeve 18. Before use, the negative pressure pipe head 21 can be rotated by rotating the ball head 16 according to the usage requirements. Furthermore, the angle can be adjusted through the ball head 16, and it has a certain interference fit. After the angle is adjusted, the relative position can be fixed, so that the operator can change the position and angle of the negative pressure tube head 21. By changing the extension state of the corrugated negative pressure tube 20, the relative distance between the negative pressure tube head 21 and the fourth negative pressure tube 19 can be changed. The user can be positioned on one side of the bone cement. When in use, the negative pressure machine connected to the first negative pressure tube 4 is started, so that the negative pressure tube head 21 can absorb the heat-fused bone cement. This can also increase the adaptability of the device when removing the prosthesis for different patients. The high-frequency electrosurgical pen body 2 has an electrosurgical wire 7 fixedly connected to its side wall. The electrosurgical wire 7 is electrically connected to the high-frequency electrosurgical pen tip 1, so that the electrosurgical wire 7 does not affect the use of the fixing cap 6. Several anti-slip rods are fixedly connected to the outer wall of the fixing cap 6, making the fixing cap 6 easy to use. The outer wall of the first negative pressure tube 4 is fitted with a fixing ring 8, which is located inside the high-frequency electrosurgical pen body 2. The high-frequency electrosurgical pen body 2 limits the fixing ring 8, thus restricting the position of the first negative pressure tube 4 inside the high-frequency electrosurgical pen body 2. The high-frequency electrosurgical pen tip 1 is a curved rod shape, located in the middle of the bottom end of the high-frequency electrosurgical pen body 2. The high-frequency electrosurgical pen tip 1 is bent towards the outer wall of the high-frequency electrosurgical pen body 2, so that when the high-frequency electrosurgical pen tip 1 is used, only the end of the high-frequency electrosurgical pen tip 1 is in contact with the prosthesis, avoiding an excessively large contact area between the high-frequency electrosurgical pen tip 1 and the prosthesis, which would affect the heating effect. It also makes it easy to control the end of the high-frequency electrosurgical pen tip 1 to contact the prosthesis during operation, making it convenient to use. A heat-conducting ball 3 is installed at the bottom of the high-frequency electrosurgical pen tip 1. The second negative pressure tube 14 is a curved rod, which allows the second negative pressure tube 14 to change the angle of the ball platform 15, the ball head 16, and the third negative pressure tube 17. This ensures that the negative pressure tube head 21 is located on the side of the heat-conducting ball 3, ensuring that the negative pressure tube head 21 absorbs the molten bone cement. The diameter of the high-frequency electrosurgical pen tip 1 is smaller than the diameter of the heat-conducting ball 3. The heat-conducting ball 3 is located below the outer wall of the high-frequency electrosurgical pen body 2, which allows the heat-conducting ball 3 to accumulate more heat than the high-frequency electrosurgical pen tip 1. This results in a lower heat change of the heat-conducting ball 3 after it contacts the prosthesis and transfers heat to the prosthesis. This facilitates the heat transfer of the heat-conducting ball 3 to the prosthesis. It also ensures that when the operator holds the high-frequency electrosurgical pen body 2 vertically and moves the heat-conducting ball 3, the heat-conducting ball 3 contacts the prosthesis, while the high-frequency electrosurgical pen body 2 does not come into contact with the prosthesis, improving the ease of operation.

[0039] like Figures 2 to 4 As shown, the outer walls of the bottom ends of the first negative pressure tube 4 and the third negative pressure tube 17 are provided with several annularly distributed limiting slots 9 and guide slots 11. The inner walls of the first connecting sleeve 13 and the second connecting sleeve 18 are fixedly connected with several annularly distributed limiting blocks 10 and guide blocks 12. The limiting blocks 10 are movably engaged with the limiting slots 9, and the guide blocks 12 are slidably connected in the guide slots 11. This allows the guide slots 11 to restrict the movement of the first connecting sleeve 13 and the second connecting sleeve 18 through the guide blocks 12, ensuring the engagement of the limiting slots 9 and the limiting blocks 10. This ensures that the first connecting sleeve 13 and the first negative pressure tube 4, as well as the second connecting sleeve 18 and the third negative pressure tube 17, can be successfully engaged in one go, facilitating operation and use. It also allows the suction assembly to be quickly disassembled and replaced after operation, making it convenient to use. The outer walls of the first connecting sleeve 13 and the second connecting sleeve 18 are fixedly connected with several anti-slip ridges, making it easy to pick up and operate the first connecting sleeve 13 and the second connecting sleeve 18.

[0040] like Figure 2 , Figure 4 and Figure 5 As shown, a sphere with a hole in the middle is fixedly connected to the bottom end of the negative pressure tube head 21. The sphere avoids sharp edges, so that the negative pressure tube head 21 will not scratch the host bone when it comes into contact with it. A digging rod 22 is fixedly connected to one end of the negative pressure tube head 21, and a digging spoon 23 is fixedly connected to one end of the digging rod 22. A groove 25 is opened on one side of the digging spoon 23, so that the operator can move the negative pressure tube head 21 to the required position before working. The front end of the digging spoon 23 is in close contact with the bone cement. Then, when the high-frequency electrosurgical pen body 2 is moved, the negative pressure tube head 21 and the digging spoon 23 will move. The digging spoon 23 digs out the molten bone cement, so that the bone cement absorption effect is better. Limiting holes 26 and protective holes 27 are respectively opened at the upper and lower ends of one side of the digging spoon 23. The groove 25, the limiting hole 26 and the protective hole 27 are connected. The length of the protective hole 27 is greater than the length of the limiting hole 26. The groove 25 is located below the heat-conducting ball 3, and the limiting hole 26 fits with the prosthesis, allowing the tip of the spatula 23 to be embedded deep into the bone cement to dig deeper into the bone cement, improving the absorption effect of the negative pressure tube head 21 on the bone cement. Since the prosthesis, the bone cement layer, and the side of the host bone are on the same plane, the fit between the limiting hole 26 and the prosthesis limits the embedding depth of the groove 25, preventing the spatula 23 from damaging the host bone. This also prevents the protective hole 27 from contacting the host bone, avoiding damage to the host bone during the movement of the spatula 23. In use, the tip of the spatula 23 is inserted into the bone cement, and the limiting hole 26 is fitted with the prosthesis to limit the depth of the tip of the spatula 23 into the bone cement. Because the length of the protective hole 27 is greater than the length of the limiting hole 26, and the prosthesis and the host bone are on the same plane, the protective hole 27 will not fit with the host bone when the limiting hole 26 is fitted with the prosthesis.

[0041] Both sides of the digging rod 22 are fixedly connected with reinforcing ribs 24, which are fixedly connected to the negative pressure pipe head 21. The reinforcing ribs 24 are triangular, which stabilizes the position of the digging rod 22 by the negative pressure pipe head 21 through the reinforcing ribs 24, thus ensuring the relative positional stability of the negative pressure pipe head 21 and the digging rod 22.

[0042] The working principle of the technical solution provided by this invention is as follows:

[0043] In use, the suction component is used to collect the bone cement after it has been heated and melted by the high-frequency electrosurgical pen tip 1. The operator operates the high-frequency electrosurgical unit connected to the high-frequency electrosurgical pen tip 1, setting the operating mode of the high-frequency electrosurgical unit to "pure electrocoagulation" mode and the output power parameter to 70 watts (this parameter ensures effective melting of bone cement while avoiding excessive heat diffusion that could damage the host bone). Then, the end of the high-frequency electrosurgical pen tip 1 is aligned with the prosthesis above the interface between the prosthesis and the bone cement, allowing the high-frequency electrosurgical pen tip 1 to heat and melt the bone cement by heating the prosthesis. This reduces the difficulty of separating the main bone of the patient from the prosthesis and lowers the requirements for operator experience and skill. The suction component collects the melted bone cement, and the operator can judge whether the bone cement has been heated to the point of melting by whether the bone cement has been collected, reducing the difficulty of operation and reducing the possibility of the melted bone cement falling onto the host bone, thus reducing the difficulty of the operator's subsequent bone cement cleaning operation.

[0044] When the negative pressure tube head 21 moves, it will not scratch the host bone when it comes into contact with it. Before starting work, the operator needs to move the negative pressure tube head 21 to the required position so that the front end of the groove 25 is in close contact with the bone cement. Then, when the high-frequency electrosurgical pen body 2 is moved, it will drive the negative pressure tube head 21 and the digging spoon 23 to move. The digging spoon 23 digs out the molten bone cement, which makes the bone cement absorption effect better. The front end of the digging spoon 23 can be embedded in the bone cement to dig deeper into the bone cement, which improves the absorption effect of the negative pressure tube head 21 on the bone cement. The fitting of the limiting hole 26 with the prosthesis limits the embedding depth of the groove 25 to prevent the digging spoon 23 from damaging the host bone. It also prevents the protective hole 27 from contacting the host bone, thus preventing damage to the host bone during the movement of the digging spoon 23.

[0045] Before use, the guide groove 11 restricts the movement of the first connecting sleeve 13 and the second connecting sleeve 18 by the guide block 12, ensuring that the limiting slot 9 and the limiting block 10 are engaged. This ensures that the first connecting sleeve 13 and the first negative pressure pipe 4, as well as the second connecting sleeve 18 and the third negative pressure pipe 17, can be engaged successfully in one go, making operation convenient. It also allows the suction component to be quickly disassembled and replaced after operation, making it convenient to use.

[0046] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit, comprising a high-frequency electrosurgical pen tip, characterized in that, The high-frequency electrosurgical pen tip is fixedly connected to a high-frequency electrosurgical pen body. The high-frequency electrosurgical pen body has a connecting plate at its top. A first negative pressure tube is installed on the connecting plate and passes through the connecting plate. A fixing cap is threadedly connected to the top of the high-frequency electrosurgical pen body. The fixing cap is movably sleeved with the first negative pressure tube. The fixing cap is located at the top of the high-frequency electrosurgical pen body and fits against the connecting plate. The bottom end of the first negative pressure tube extends to the outside of the bottom end of the high-frequency electrosurgical pen body. A suction component is provided at the lower end of the first negative pressure tube. The suction component is used to suction the bone cement that has been heated and melted by the high-frequency electrosurgical pen tip through the prosthesis. The suction assembly includes a first connecting sleeve that is movably engaged with the first negative pressure tube located outside the body of the high-frequency electrosurgical pen. A second negative pressure tube is connected to the first negative pressure tube through the first connecting sleeve. A ball table is fixedly connected to the bottom end of the second negative pressure tube. A ball head is movably engaged inside the ball table. One end of the ball head extending out of the ball table is connected to a third negative pressure tube. A second connecting sleeve is movably engaged to the bottom end of the third negative pressure tube. A fourth negative pressure tube is connected to the third negative pressure tube through the second connecting sleeve. The bottom end of the fourth negative pressure tube is connected to a negative pressure tube head through a corrugated negative pressure tube. A heat-conducting ball is installed at the bottom of the high-frequency electrosurgical pen tip. The diameter of the high-frequency electrosurgical pen tip is smaller than the diameter of the heat-conducting ball. The heat-conducting ball is located below the outer wall of the high-frequency electrosurgical pen body. One end of the negative pressure pipe head is fixedly connected to a digging rod, and one end of the digging rod is fixedly connected to a digging spoon. A groove is opened on one side of the digging spoon, and a limiting hole and a protective hole are respectively opened at the upper and lower ends of one side of the digging spoon. The groove, the limiting hole and the protective hole are connected. The length of the protective hole is greater than the length of the limiting hole. The groove is located below the heat-conducting ball, and the limiting hole fits into the prosthesis.

2. The prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit according to claim 1, characterized in that, The outer walls of the bottom ends of the first negative pressure pipe and the third negative pressure pipe are provided with a plurality of annularly distributed limiting slots and guide slots. The inner walls of the first connecting sleeve and the second connecting sleeve are fixedly connected with a plurality of annularly distributed limiting blocks and guide blocks. The limiting blocks are movably engaged with the limiting slots, and the guide blocks are slidably connected in the guide slots.

3. The prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit according to claim 1, characterized in that, Both the first connecting sleeve and the second connecting sleeve have several anti-slip ridges fixedly connected to their outer walls.

4. The prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit according to claim 1, characterized in that, An electric knife wire is fixedly connected to the side wall of the high-frequency electric knife pen body. The electric knife wire is electrically connected to the high-frequency electric knife pen tip. Several anti-slip rods are fixedly connected to the outer wall of the fixing cap. A fixing ring is sleeved on the outer wall of the first negative pressure tube. The fixing ring is located inside the high-frequency electric knife pen body, and the high-frequency electric knife pen body limits the fixing ring.

5. The prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit according to claim 1, characterized in that, The high-frequency electrosurgical pen tip is a curved rod shape, located in the middle of the bottom end of the high-frequency electrosurgical pen body, and the high-frequency electrosurgical pen tip is bent towards the outer wall of the high-frequency electrosurgical pen body. The second negative pressure tube is a curved tube.

6. The prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit according to claim 1, characterized in that, The bottom end of the negative pressure pipe head is fixedly connected to a sphere with a hole in the middle.

7. The prosthesis removal device for knee joint replacement revision surgery based on a high-frequency electrosurgical unit according to claim 1, characterized in that, The digging rod is fixedly connected to both sides with reinforcing ribs, which are fixedly connected to the negative pressure pipe head. The reinforcing ribs are triangular.

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