Knee revision surgery tool

Abstract

The application provides a knee joint revision surgery tool, which comprises a handle body, a first insertion hole and a receiving cavity are arranged on the handle body at intervals, a plurality of bone knives, the plurality of bone knives can be received in the receiving cavity, the plurality of bone knives comprise a first bone knife which is selectively inserted into the first insertion hole, and a locking member which is movably arranged on the handle body, when the first bone knife is inserted into the first insertion hole, the locking member has a first locking position for locking the first bone knife and a first unlocking position for unlocking the first bone knife. The technical scheme of the application effectively solves the problem of inconvenient mounting and dismounting of the bone knives of the knee joint revision surgery tool in the related art.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a tool for knee revision surgery. Background Technology

[0002] Knee revision surgery refers to the procedure performed when a patient experiences issues such as prosthesis mechanical failure, misalignment, joint stiffness, periprosthetic fracture, or deep infection. In such cases, the original knee prosthesis needs to be removed and a new one implanted to ensure the patient regains mobility.

[0003] During the removal of the original prosthesis, bone cement is often added between the prosthesis and bone during early implantation to ensure a firm fit and prevent loosening. This strengthens the bond between the prosthesis and bone. Consequently, in revision surgery, the original prosthesis is often difficult to remove, or removal may involve the removal of a large amount of bone, causing further damage to the patient's bone and complicating subsequent revision surgeries.

[0004] To separate the original prosthesis from the bone and reduce secondary bone damage during the removal of the original prosthesis, the knee revision surgery tools need to be adaptable to different joint positions, joint methods, and original prosthesis configurations of the original prosthesis and bone. While minimizing damage to the original bone, the tools can be inserted deep between the original prosthesis and bone to dissect the original prosthesis.

[0005] Currently, knee revision surgery tools consist of a handle and multiple bone scalpels. These scalpels and the handle are stored together in a toolbox. When attaching or detaching a scalpel, one is selected from the multiple scalpels in the toolbox and attached to the handle. Each time a scalpel is attached or detached, it must be taken through the toolbox, making the process inconvenient. Summary of the Invention

[0006] The main objective of this invention is to provide a knee revision surgery tool to solve the problem of inconvenient assembly and disassembly of bone scalpels in related knee revision surgery tools.

[0007] To achieve the above objectives, the present invention provides a knee joint revision surgery tool, comprising: a handle body having first insertion holes and storage cavities spaced apart thereon; a plurality of bone blades, the plurality of bone blades being able to be stored in the storage cavity, the plurality of bone blades including a first bone blade selectively inserted into the first insertion hole; and a locking member movably disposed on the handle body, wherein when the first bone blade is inserted into the first insertion hole, the locking member has a first locking position for locking the first bone blade and a first unlocking position for unlocking the first bone blade.

[0008] Furthermore, the storage cavity extends along the length of the handle, and the knee revision surgery tool also includes a cover plate that is movably mounted on the handle, which can open and close the opening of the storage cavity.

[0009] Furthermore, the first insertion hole is located at the first end of the handle, and the cavity is located at the second end of the handle. The knee joint revision surgery tool also includes a pusher rotatably disposed on the first end of the handle. The pusher includes multiple push heads connected sequentially along a direction perpendicular to the length. In the direction of sequential connection, the next push head protrudes from the previous push head along the length direction. When the multiple bone blades are stored in the storage cavity, the multiple push heads can push and cooperate with the multiple bone blades one by one. When the pusher rotates, it has a pushing position where the multiple push heads push and cooperate with the multiple bone blades one by one, and a clearance position where the multiple push heads avoid the multiple bone blades. When the pusher is in the pushing position, the multiple bone blades extend out of the cavity. When the pusher is in the clearance position, the multiple bone blades are stored in the storage cavity.

[0010] Furthermore, each pusher includes a pusher arc surface and a clearance plane. When multiple pusher arc surfaces are in one-to-one pusher engagement with multiple bone blades, the pusher is in the pusher position. When multiple clearance planes are facing multiple bone blades in one-to-one correspondence, the pusher is in the clearance position.

[0011] Furthermore, the dimensions of each pusher head gradually decrease along the direction of sequential connection. The pusher also includes multiple elastic wires, which are wound around the multiple pusher heads one by one. The length of each elastic wire is greater than or equal to the circumference of the corresponding pusher head. The multiple elastic wires can push and cooperate with the multiple bone blades one by one. The handle is also provided with multiple guide holes, the axis of each guide hole extends along the length direction, and the multiple elastic wires pass through the multiple guide holes one by one.

[0012] Furthermore, the first end of each elastic wire is connected to the pusher head, and the second end of each elastic wire includes a folded segment passing through a guide hole, each folded segment being able to engage with the corresponding bone blade pusher head.

[0013] Furthermore, the first sides of any two push tops are aligned, and the second side of the next push top in the direction of sequential connection of the plurality of push tops protrudes along the length direction from the second side of the previous push top, wherein the first side and the second side are arranged opposite each other along the length direction.

[0014] Furthermore, the pusher also includes a rotating shaft rotatably passing through the first end of the handle, a knob provided on the first end of the rotating shaft, and a limiting ring groove provided on the second end of the rotating shaft. The axis of the rotating shaft is perpendicular to the length direction, and multiple pushers are connected to the rotating shaft. An axial limiting post passing through the limiting ring groove is also provided on the handle.

[0015] Furthermore, the axis of the first insertion hole is parallel to the axis of the handle, and the handle is also provided with a second insertion hole, the axis of the second insertion hole being perpendicular to the axis of the handle. The multiple bone knives also include a second bone knife selectively inserted into the second insertion hole, and the locking member also has a second locking position for locking the second bone knife and a second unlocking position for unlocking the second bone knife.

[0016] Furthermore, the locking component includes a push plate slidably disposed on the handle and a first locking post and a second locking post movably disposed on the handle. The first locking post and the second locking post are spaced apart along the length direction of the handle. When the push plate slides, it pushes the first locking post to lock or unlock the first bone knife, or when the push plate slides, it pushes the second locking post to lock or unlock the second bone knife.

[0017] Furthermore, the first bone knife among the multiple bone knives includes a first handle and a first blade head, the first blade head being provided with a first arc-shaped blade and a first inclined blade connected to the first arc-shaped blade; the second bone knife among the multiple bone knives includes a second handle and a second blade head, the second blade head being provided with a second arc-shaped blade and a second inclined blade connected to the second arc-shaped blade, the inclination direction of the second inclined blade being opposite to the inclination direction of the first inclined blade; the third bone knife among the multiple bone knives includes a third handle and a third blade head, the third blade head being provided with a U-shaped blade; the fourth bone knife among the multiple bone knives includes a fourth handle and a fourth blade head, the fourth blade head being provided with a first straight blade; the fifth bone knife among the multiple bone knives includes a fifth handle and a fifth blade head, the fifth blade head being provided with a vertically arranged second straight blade and a third straight blade.

[0018] According to the technical solution of this invention, a knee revision surgery tool includes a handle, multiple bone blades, and a locking member. The handle has first insertion holes and storage cavities spaced apart. Multiple bone blades can be stored in the storage cavity, including a first bone blade selectively inserted into the first insertion hole. The locking member is movably disposed on the handle. When the first bone blade is inserted into the first insertion hole, the locking member has a first locking position for locking the first bone blade and a first unlocking position for unlocking the first bone blade. Thus, multiple bone blades are stored in the storage cavity, allowing for the carrying of various types of bone blades. When installing a bone blade, the operator directly selects one from the storage cavity and inserts it into the first insertion hole; when removing a bone blade, the operator can remove it from the first insertion hole and directly place it into the storage cavity. This facilitates the installation and removal of the first bone blade, eliminating the need for a toolbox as in related technologies. Furthermore, the locking member can lock the first bone blade onto the handle, ensuring that the first bone blade is securely installed and operated. Therefore, the technical solution of this embodiment effectively solves the problem of inconvenient assembly and disassembly of bone scalpels in knee joint revision surgery tools in related technologies. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A three-dimensional structural schematic diagram of an embodiment of a knee revision surgery tool according to the present invention is shown, showing the first bone blade inserted into the first insertion hole; Figure 2 It shows Figure 1 A three-dimensional structural diagram of the second osteotome inserted into the second insertion hole of the knee revision surgery tool; Figure 3 It shows Figure 1 A schematic diagram of the exploded structure of the tools used in knee revision surgery; Figure 4 It shows Figure 1 A cross-sectional view of multiple second osteotomies, part of the knee revision surgery tools, stored within a storage cavity; Figure 5 It shows Figure 4 A schematic sectional view of the knee revision surgery tools along the AA direction; Figure 6 It shows Figure 5 A bottom-view diagram of the push plate used in knee revision surgery. Figure 7 It shows Figure 1 A partial cross-sectional view of multiple second osteotomies protruding from the cavity opening of the knee revision surgery tool; Figure 8 It shows Figure 1 A partial three-dimensional structural diagram of the knee revision surgery tool when the pusher is not shown. Figure 9 It shows Figure 1 A three-dimensional structural diagram of the pusher component of a knee revision surgery tool; Figure 10 It shows Figure 9 A front view diagram of the pusher component in the avoidance position; Figure 11 It shows Figure 9 A front view diagram of the pushing component rotating from the avoidance position to the pushing position; Figure 12 It shows Figure 9 A cross-sectional view of the pusher component after it has been cut through the limiting ring groove; Figure 13 It shows Figure 1 A three-dimensional structural diagram of multiple bone blades used in knee revision surgery. Figure 14 It shows Figure 13 A magnified diagram of point B among multiple bone knives; Figure 15 It shows Figure 13 A magnified diagram of point C among multiple bone knives; Figure 16 It shows Figure 13 A cross-sectional view of the first osteotome inserted between the tibial plateau prosthesis and the bone; Figure 17 It shows Figure 13 A bottom view of the first osteotome inserted below the tibial plateau prosthesis; Figure 18 It shows Figure 13 A side view diagram showing the insertion of the third osteotome into the distal surface of the femoral condyle prosthesis.

[0020] The above figures include the following reference numerals: 10. Handle; 11. First insertion hole; 12. Receiving cavity; 121. Cavity opening; 13. Guide hole; 14. Axial limiting post; 15. Second insertion hole; 16. Positioning hole; 20. Bone knife; 21. First bone knife; 22. Second bone knife; 211. First handle; 212. First blade tip; 213. First curved blade; 214. First inclined blade; 221. Second handle; 222. Second blade tip; 223. Second curved blade; 224. Second inclined blade; 231. Third handle; 232. Third blade tip; 233. U-shaped blade; 241. Fourth handle; 242. Fourth blade tip; 243. First straight blade; 251. Fifth handle; 252. Fifth blade tip; 253. Second straight blade; 254. Third straight blade; 30. Locking element; 31. Push plate; 32. First locking pin; 33. Second locking pin; 34. First spring; 35. Second slide groove; 351. First positioning groove; 352. Second positioning groove; 353. Third positioning groove; 40. Cover plate; 50. Pushing component; 51. Pushing top; 511. Pushing arc surface; 512. Clearance plane; 52. Elastic wire; 521. Fold segment; 53. Rotating shaft; 54. Knob; 55. Limiting ring groove; 61. Positioning pin; 62. Second spring; 71. Bone; 72. Tibial plateau prosthesis; 73. Femoral condyle prosthesis. Detailed Implementation

[0021] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] like Figures 1 to 7 As shown, this application provides a knee joint revision surgery tool. An embodiment of the knee joint revision surgery tool includes: a handle 10, a plurality of bone blades 20, and a locking member 30. The handle 10 is provided with first insertion holes 11 and receiving cavities 12 spaced apart. The plurality of bone blades 20 can be stored in the receiving cavity 12, and the plurality of bone blades 20 includes a first bone blade 21 selectively inserted into the first insertion hole 11. The locking member 30 is movably disposed on the handle 10. When the first bone blade 21 is inserted into the first insertion hole 11, the locking member 30 has a first locking position for locking the first bone blade 21 and a first unlocking position for unlocking the first bone blade 21. When the first bone blade 21 is unlocked, it can be removed from the first insertion hole 11.

[0025] Using the technical solution of this embodiment, multiple bone scalpels 20 are stored in the storage cavity 12, enabling the carrying of various types of bone scalpels. When installing the bone scalpels 20, the operator can directly select one of the first bone scalpels 21 from the storage cavity 12 and insert the first bone scalpel 21 into the first insertion hole 11; when removing the bone scalpels 20, the operator can remove the first bone scalpel 21 from the first insertion hole 11 and directly place it into the storage cavity 12 for storage. This facilitates the installation and removal of the first bone scalpel 21, eliminating the step of using a toolbox in related technologies. Furthermore, the locking member 30 can lock the first bone scalpel 21 onto the handle 10, ensuring that the first bone scalpel 21 can be securely installed and operated. Therefore, the technical solution of this embodiment effectively solves the problem of inconvenient installation and removal of bone scalpels in knee joint revision surgery tools in related technologies.

[0026] It should be noted that the multiple bone cutters 20 are of different types. Depending on the needs of the operator, doctor, nurse or tester for different integration positions, integration methods and different original prosthesis configurations between the original prosthesis and bone, the first bone cutter 21 can be any type required.

[0027] The locking element 30 in this application is movable and / or rotatable.

[0028] like Figures 1 to 7 As shown, the storage cavity 12 extends along the length of the handle 10. Thus, the shape of the storage cavity 12 is adapted to each bone blade 20, allowing the storage cavity 12 to neatly accommodate multiple bone blades 20. The knee revision surgery tool also includes a cover plate 40 movably mounted on the handle 10, which can open and close the opening 121 of the storage cavity 12. When the cover plate 40 closes the opening 121, it prevents the bone blades 20 located in the storage cavity 12 from falling out. Simultaneously, it allows for the safe carrying of multiple bone blades, preventing injury to the operator from sharp blades, and protecting the blade edges from damage due to transportation bumps. When the cover plate 40 opens the opening 121, a first bone blade 21 can be selectively removed from the storage cavity 12.

[0029] like Figures 1 to 7 As shown, the cover plate 40 in this application is movable, rotatable, or flip-up. In this embodiment, the cover plate 40 is movably disposed on the handle 10, and the cover plate 40 and the handle 10 are connected by a first sliding structure. The first sliding structure includes a first T-shaped groove and a first T-shaped slider that slides in conjunction with the first T-shaped groove. The extension direction of the first T-shaped groove is perpendicular to the length direction. A connecting post for connecting the cover plate 40 passes through the handle 10, and a limiting elongated hole is provided on the cover plate 40 for the connecting post to pass through, thereby limiting the sliding range of the cover plate 40.

[0030] like Figures 1 to 7As shown, the first insertion hole 11 is located at the first end of the handle 10, and the cavity 121 is located at the second end of the handle 10. In order for the operator to quickly and safely replace the first bone blade 21, the knee joint revision surgery tool also includes a pusher 50 rotatably disposed on the first end of the handle 10. The pusher 50 includes a plurality of pushers 51 connected in sequence along a direction perpendicular to the length direction. In the direction of sequential connection, the next pusher 51 protrudes from the previous pusher 51 along the length direction. When the multiple bone blades 20 are stored in the storage cavity 12, the multiple pushers 51 can push and engage with each bone blade 20 in a one-to-one correspondence. When the pushers 50 rotate, they have pushing positions where the multiple pushers 51 engage with each bone blade 20 in a one-to-one correspondence, and clearance positions where the multiple pushers 51 avoid the multiple bone blades 20. When the pushers 50 is in the pushing position, the multiple bone blades 20 extend out of the cavity 121. At this time, the multiple bone blades 20 are arranged in a stepped manner, making it easy for the operator to observe the type of each bone blade 20, so that the operator can easily remove the first bone blade 21 for replacement. When the pushers 50 is in the clearance position, the multiple pushers 51 no longer push the multiple bone blades 20, and the multiple bone blades 20 are stored in the storage cavity 12.

[0031] It should be noted that the "direction in which multiple push tops 51 are connected in sequence" mentioned above refers to the direction from the outer side of the handle 10 to the inside of the handle 10.

[0032] like Figures 1 to 11 As shown, each pusher 51 includes a pusher arc surface 511 and a clearance surface 512. When multiple pusher arc surfaces 511 are engaged with multiple bone cutters 20 in a one-to-one pusher configuration, the multiple bone cutters 20 make smooth contact with the multiple pusher arc surfaces 511 in a one-to-one correspondence, so that the multiple bone cutters 20 smoothly extend out of the cavity 121, facilitating the pusher 50 to be in the pusher position. When multiple clearance surfaces 512 are facing the multiple bone cutters 20 in a one-to-one correspondence, the multiple clearance surfaces 512 will not interfere with the multiple bone cutters 20, and the cover plate 40 can close the cavity 121, so that the pusher 50 is in the clearance position.

[0033] like Figures 4 to 12As shown, the dimensions of each pusher 51 gradually decrease along the direction of sequential connection. The pusher 50 also includes multiple elastic wires 52, which are wound one-to-one around the multiple pushers 51. Since the length of each elastic wire 52 is greater than the circumference of the corresponding pusher 51, the multiple elastic wires 52 can push and engage with the multiple bone blades 20 one-to-one. In this way, the distance by which the multiple elastic wires 52 push the multiple bone blades 20 out of the cavity 121 is greater than the distance by which the multiple pushers 51 push the multiple bone blades 20 out of the cavity 121, and the distances by which the multiple bone blades 20 out of the cavity 121 are different. This makes it easier for the operator to observe the first bone blade 21 and to remove it. The elastic wires 52 are preferably shape memory alloy elastic wires.

[0034] like Figures 4 to 12 As shown, the handle 10 is also provided with multiple guide holes 13, the axis of each guide hole 13 extending along the length direction, and multiple elastic wires 52 passing through the multiple guide holes 13 one by one. During the rotation of the pusher 50, when each guide hole 13 is guided and engaged with the corresponding elastic wire 52, it guides the elastic wire 52 on the one hand to prevent the elastic wire 52 from deviating, and on the other hand, it guides the pushing direction of the elastic wire 52, that is, from the rotation direction to the movement direction consistent with the length direction, so that the multiple elastic wires 52 can be aligned one by one with the multiple bone cutters 20, so as to push the multiple bone cutters 20 to move.

[0035] In this embodiment, each pusher top 51 is provided with an annular groove, and each elastic wire 52 is wound in the corresponding annular groove.

[0036] In this embodiment, each pusher 51 is disc-shaped, and the distance by which the bone blade 20 corresponding to each pusher 51 extends out of the cavity 121 is greater than or equal to the radius of the corresponding disc shape. The distance by which the bone blade 20 corresponding to each elastic wire 52 extends out of the cavity 121 is greater than the circumference of the corresponding disc shape.

[0037] In other embodiments, the length of each elastic wire is equal to the circumference of the corresponding pusher. Each pusher 51 is disc-shaped, and the distance by which the bone blade 20 corresponding to each elastic wire 52 extends out of the cavity 121 is equal to the circumference of the corresponding disc shape.

[0038] like Figures 4 to 12 As shown, the first end of each elastic wire 52 is connected to the pusher head 51, and the second end of each elastic wire 52 includes a folded segment 521 that passes through the guide hole 13. Each folded segment 521 can engage with the corresponding bone blade 20 pusher head. The folded segment 521 increases the contact area between the elastic wire 52 and the corresponding bone blade 20 pusher head, ensuring that each elastic wire 52 can smoothly push the corresponding bone blade 20 out of the cavity 121.

[0039] like Figures 4 to 12 As shown, in order to facilitate the operation of the operator to observe and extract the multiple push tops 51 when the push top 50 is in the push position, the second sides of the multiple push tops 51 are arranged in a stepped manner. Similarly, in order to facilitate the operation of the multiple bone knives 20 when the push top 50 is in the avoidance position, the multiple push tops 51 will not interfere with the multiple bone knives 20 during the process of storing the multiple bone knives into the storage cavity 12. The first sides of any two push tops 51 are arranged flat. The second side of the next push top 51 in the direction of sequential connection of the multiple push tops 51 protrudes from the second side of the previous push top 51 along the length direction. The first side and the second side are arranged opposite each other along the length direction.

[0040] like Figures 4 to 12 As shown, the pusher 50 also includes a rotating shaft 53 rotatably passing through the first end of the handle 10, a knob 54 disposed on the first end of the rotating shaft 53, and a limiting ring groove 55 disposed on the second end of the rotating shaft 53. The knob 54 facilitates the operator's operation of rotating the pusher 50. The axis of the rotating shaft 53 is perpendicular to the length direction, and multiple pushers 51 are connected to the rotating shaft 53. The handle 10 is also provided with an axial limiting post 14 passing through the limiting ring groove 55. The axial limiting post 14 can restrict the rotating shaft 53 of the pusher 50 within the handle 10, preventing the rotating shaft 53 from disengaging from the handle 10. Furthermore, when the pusher 50 rotates, the axial limiting post 14 restricts the axial movement of the rotating shaft 53 on the one hand, and allows the limiting ring groove 55 to rotate relative to the axial limiting post 14 on the other hand, so that the pusher 50 rotates smoothly and prevents the pusher 50 from tilting.

[0041] like Figures 4 to 12 As shown, the axis of the first insertion hole 11 is parallel to the axis of the handle 10. Thus, the first bone cutter 21, inserted into the first insertion hole 11, facilitates the use of a bone hammer to strike the second end of the handle 10, allowing the first bone cutter 21 to quickly embed into the prosthesis and bone (e.g., ...). Figure 16Between the tibial plateau prosthesis 72 and the bone 71. A second insertion hole 15 is also provided on the handle 10, the axis of which is perpendicular to the axis of the handle 10. The plurality of bone blades 20 also include a second bone blade 22 selectively inserted into the second insertion hole 15. The location of the second insertion hole 15 facilitates the operator to pull out the second bone blade 22 or to use it for lateral cutting. The locking member 30 also has a second locking position for locking the second bone blade 22 and a second unlocking position for unlocking it. When replacing the bone blade 20, the second bone blade 22 is selectively removed from the storage cavity 12 and inserted into the second insertion hole 15, facilitating the replacement of the second bone blade 22 and eliminating the need for replacing bone blades from a toolbox in related technologies. The locking member 30 can also lock the second bone blade 22 onto the handle 10, ensuring that the second bone blade 22 is securely installed and can be used. When the second bone knife 22 is unlocked, the second bone knife 22 can be removed from the second socket 15.

[0042] It should be noted that the type of the second bone knife 22 can be the same as or different from the type of the first bone knife 21. The second unlocking position and the first unlocking position can be the same position or different positions.

[0043] like Figures 1 to 12 As shown, to facilitate the locking member 30 in securely locking the first bone knife 21 or the second bone knife 22 onto the handle 10, the locking member 30 includes a push plate 31 slidably disposed on the handle 10 and a first locking post 32 and a second locking post 33 movably disposed on the handle 10. The first locking post 32 and the second locking post 33 are spaced apart along the length of the handle 10. When the push plate 31 slides, it pushes the first locking post 32 to lock or unlock the first bone knife 21; or, when the push plate 31 slides, it pushes the second locking post 33 to lock or unlock the second bone knife 22. The push plate 31 is designed for easy manual operation by the operator.

[0044] In this embodiment, the knee revision surgery tool further includes a first protective sleeve disposed between the first insertion hole 11 and the first bone cutter 21, and a second protective sleeve disposed between the second insertion hole 15 and the second bone cutter 22. This ensures the protection of both the first insertion hole 11 and the second insertion hole 15, as well as the first bone cutter 21 and the second bone cutter 22.

[0045] In this embodiment, a first sliding groove is provided on the side of the push plate 31 facing the handle 10. The first sliding groove extends along the length direction, and the first end of the first locking post 32 and the first end of the second locking post 33 are both located in the first sliding groove. The first bone knife 21 is provided with a first locking hole that can lock and engage with the second end of the first locking post 32, and the second bone knife 22 is provided with a second locking hole that can lock and engage with the second end of the second locking post 33. A first spring 34 is provided on both the first locking post 32 and the second locking post 33. A first pushing slope and a second pushing slope are provided at intervals along the length direction in the first sliding groove, and the inclination direction of the first pushing slope and the inclination direction of the second pushing slope are opposite. When the push plate 31 slides towards the first end of the handle 10, when the first pushing slope engages with the first end of the first locking pin 32, the second end of the first locking pin 32 is inserted into the first lock hole; when the push plate 31 slides towards the second end of the handle 10, when the first pushing slope avoids the first end of the first locking pin 32, the second end of the first locking pin 32 moves out of the first lock hole when the first spring 34 on the first locking pin 32 applies a restoring force to the first locking pin 32; when the push plate 31 slides towards the second end of the handle 10, when the second pushing slope engages with the first end of the second locking pin 33, the second end of the second locking pin 33 is inserted into the second lock hole; when the push plate 31 slides towards the first end of the handle 10, when the second pushing slope avoids the first end of the second locking pin 33, the second end of the second locking pin 33 moves out of the second lock hole when the first spring 34 on the second locking pin 33 applies a restoring force to the second locking pin 33. The first spring 34 is preferably a butterfly-shaped spring.

[0046] In this embodiment, the push plate 31 is slidably disposed on the handle 10, and the push plate 31 and the handle 10 are connected by a second sliding structure. The second sliding structure includes a second T-shaped slider that slides in conjunction with the second T-shaped groove. The second T-shaped groove extends along the length direction.

[0047] In this embodiment, a second slide groove 35 is provided on the side of the push plate 31 facing the handle 10. A first positioning groove 351, a second positioning groove 352 and a third positioning groove 353 are sequentially and spaced apart along the length direction on the side wall of the second slide groove 35. A positioning hole 16 is also provided on the handle 10. A positioning post 61 is provided in the positioning hole 16. The axis of the positioning hole 16 is perpendicular to the length direction, and the radial dimension of the positioning hole 16 along the length direction is greater than the radial dimension of the positioning hole 16 along the length direction. A second spring 62 is also provided on the handle 10. The second spring 62 applies a restoring force to the positioning post 61 along the length direction. When the push plate 31 slides towards the first end of the handle 10, under the restoring force of the second spring 62, the positioning pin 61 moves into the first positioning groove 351, and a prompting sound is generated. This ensures that the operator receives feedback that the operation is in place when the push plate 31 slides to the point where the positioning pin 61 engages with the first positioning groove 351, and also limits the position of the push plate 31; this is the first end lock. When the push plate 31 slides towards the second end of the handle 10, under the restoring force of the second spring 62, the positioning pin 61 moves into the third positioning groove 353, and a prompting sound is generated. This ensures that the operator receives feedback that the operation is in place when the push plate 31 slides to the point where the positioning pin 61 engages with the third positioning groove 353, and also limits the position of the push plate 31; this is the second end lock. When the push plate 31 slides to the point where the positioning pin 61 engages with the second positioning groove 352, this provides feedback to the operator that the operation is in place, and also limits the position of the push plate 31; this is the neutral lock. The second spring 62 is preferably a compression spring. The outer surface of the handle 10 is provided with three reminder colors that correspond one-to-one with the first positioning groove 351, the second positioning groove 352 and the third positioning groove 353.

[0048] like Figures 1 to 3 and Figures 13 to 18 As shown, in order to accommodate different joint positions, joint methods, and original prosthesis configurations of the multiple bone blades 20, the multiple bone blades 20 include five. The first bone blade 20 of the multiple bone blades 20 includes a first handle 211 and a first blade head 212. The first blade head 212 is provided with a first arc-shaped blade 213 and a first inclined blade 214 connected to the first arc-shaped blade 213. The second bone blade 20 of the multiple bone blades 20 includes a second handle 221 and a second blade head 222. The second blade head 222 is provided with a second arc-shaped blade 223 and a second inclined blade 224 connected to the second arc-shaped blade 223. The inclination direction of the second inclined blade 224 is opposite to the inclination direction of the first inclined blade 214.

[0049] like Figures 13 to 17As shown, the first and second bone cutters 20 are specialized bone cutters for separating the tibial plateau prosthesis 72 from the bone 71 by cutting the flat surface. The curved blades of the first and second bone cutters 20 are adapted to the shape of the tibial plateau prosthesis 72, allowing the bone cutters to penetrate as deeply as possible to cut the connection between the tibial plateau prosthesis and the bone 71. The inclined blade design of the first and second bone cutters 20 has one flat side facing the prosthesis and the other inclined side facing the patient's bone. During the deep cutting process, the bone cutter is more closely aligned with the prosthesis, which avoids removing too much bone and prevents the bone cutter from shifting towards the bone side when penetrating deeper, thus avoiding greater damage to the patient.

[0050] like Figures 13 to 15 and Figure 18 As shown, the third bone cutter 20 among the multiple bone cutters 20 includes a third handle 231 and a third cutter head 232, with a U-shaped blade 233 provided on the third cutter head 232. The third bone cutter 20 is a specialized bone cutter designed for separating the distal face of the femoral condyle prosthesis 73. The U-shaped blade 233 is designed to fit the post on the femoral condyle prosthesis 73, allowing the bone cutter to cut as close to the post as possible, ensuring separation of the bone around the post. Furthermore, when striking the third bone cutter 20 to separate the prosthesis from the bone interface, it protects the soft tissue from being cut by the blade edge, while still allowing for proper design of the blade edge for separating the prosthesis from the bone joint surface.

[0051] The fourth bone blade 20 among the multiple bone blades 20 includes a fourth handle 241 and a fourth blade head 242, with a first straight cutting edge 243 provided on the fourth blade head 242. The fourth handle 241 is a commonly used thin bone blade that can penetrate most of the space between the prosthesis and the bone, used to separate the prosthesis. The fourth handle 241 has scale markings to indicate the depth of penetration.

[0052] The fifth bone blade 20 among the multiple bone blades 20 includes a fifth handle 251 and a fifth blade head 252. The fifth blade head 252 is equipped with a vertically arranged second straight blade 253 and a third straight blade 254. The fifth bone blade 20 is a unilateral bone blade designed to penetrate deep into the surgical incision while avoiding damage to the ligaments or soft tissues on both sides. This allows for cutting the prosthesis connection inside the tissue. The unilateral cutting edge design of the second straight blade 253 or the third straight blade 254 means that when the bone blade cuts between the prosthesis and the ligaments or soft tissues, the cutting edge faces the prosthesis side; thus avoiding damage to the patient's ligaments or soft tissues during cutting.

[0053] The various shapes of the five bone scalpels mentioned above can adapt to the complex shapes of prostheses, allowing surgeons to separate the prosthesis from the bone to the greatest extent possible. Furthermore, the special blade designs, such as curved blades, U-shaped blades, inclined blades, and straight blades, minimize secondary injury to the patient, achieving unified use and operation of various bone scalpels and greatly simplifying the surgical procedure.

[0054] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0055] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tool for knee revision surgery, characterized in that, include: The handle (10) is provided with a first insertion hole (11) and a storage cavity (12) spaced apart. Multiple bone blades (20), the multiple bone blades (20) can be housed in the housing cavity (12), the multiple bone blades (20) include a first bone blade (21) that is selectively inserted into the first insertion hole (11). A locking member (30) is movably disposed on the handle (10). When the first bone knife (21) is inserted into the first insertion hole (11), the locking member (30) has a first locking position for locking the first bone knife (21) and a first unlocking position for unlocking the first bone knife (21). The first insertion hole (11) is located at the first end of the handle (10), and the cavity opening (121) of the receiving cavity (12) is located at the second end of the handle (10). The knee joint revision surgery tool also includes a pusher (50) rotatably disposed on the first end of the handle (10). The pusher (50) includes a plurality of push heads (51) connected sequentially along the length direction perpendicular to the handle (10). In the direction of sequential connection, the next push head (51) protrudes out of the previous push head (51) along the length direction. When the multiple bone blades (20) are stored in the storage cavity (12), the multiple pushers (51) can push and cooperate with the multiple bone blades (20) one by one. When the pusher (50) rotates, it has a pushing position in which the multiple pushers (51) and the multiple bone blades (20) push and cooperate one by one, and a clearance position in which the multiple pushers (51) avoid the multiple bone blades (20). When the pusher (50) is in the pushing position, the multiple bone blades (20) extend out of the cavity (121). When the pusher (50) is in the clearance position, the multiple bone blades (20) are stored in the storage cavity (12). Each of the push-tops (51) has a dimension that gradually decreases along the direction of sequential connection in the length direction. The push-top (50) also includes a plurality of elastic wires (52). The plurality of elastic wires (52) are wound around the plurality of push-tops (51) in a one-to-one correspondence. The length of each elastic wire (52) is greater than or equal to the circumference of the corresponding push-top (51). The plurality of elastic wires (52) can push and cooperate with the plurality of bone cutters (20) in a one-to-one correspondence. The handle (10) is also provided with a plurality of guide holes (13). The axis of each guide hole (13) extends along the length direction. The plurality of elastic wires (52) pass through the plurality of guide holes (13) in a one-to-one correspondence.

2. The knee joint revision surgery tool according to claim 1, characterized in that, The receiving cavity (12) extends along the length of the handle (10), and the knee joint revision surgery tool also includes a cover plate (40) movably disposed on the handle (10), the cover plate (40) being able to open and close the opening (121) of the receiving cavity (12).

3. The knee joint revision surgery tool according to claim 1, characterized in that, The first end of each of the elastic wires (52) is connected to the pusher (51), and the second end of each of the elastic wires (52) includes a fold (521) passing through the guide hole (13), and each fold (521) is capable of engaging with the corresponding bone cutter (20) pusher.

4. The knee joint revision surgery tool according to claim 1, characterized in that, Any two push tops (51) are arranged with their first sides flush, and the second side of the next push top (51) in the sequentially connected direction protrudes from the second side of the previous push top (51) along the length direction.

5. The knee joint revision surgery tool according to claim 1, characterized in that, The pusher (50) also includes a rotating shaft (53) rotatably passing through the first end of the handle (10), a knob (54) provided on the first end of the rotating shaft (53), and a limiting ring groove (55) provided on the second end of the rotating shaft (53). The axis of the rotating shaft (53) is perpendicular to the length direction. Multiple pushers (51) are connected to the rotating shaft (53). The handle (10) is also provided with an axial limiting post (14) passing through the limiting ring groove (55).

6. The knee revision surgery tool according to claim 1, characterized in that, The axis of the first insertion hole (11) is parallel to the axis of the handle (10). The handle (10) is also provided with a second insertion hole (15). The axis of the second insertion hole (15) is perpendicular to the axis of the handle (10). The plurality of bone knives (20) also include a second bone knife (22) that is selectively inserted into the second insertion hole (15). The locking member (30) also has a second locking position for locking the second bone knife (22) and a second unlocking position for unlocking the second bone knife (22).

7. The knee joint revision surgery tool according to claim 6, characterized in that, The locking member (30) includes a push plate (31) slidably disposed on the handle (10) and a first locking post (32) and a second locking post (33) movably disposed on the handle (10). The first locking post (32) and the second locking post (33) are spaced apart along the length direction of the handle (10). When the push plate (31) slides, it pushes the first locking post (32) to lock or unlock the first bone knife (21), or when the push plate (31) slides, it pushes the second locking post (33) to lock or unlock the second bone knife (22).

8. The knee revision surgery tool according to claim 1, characterized in that, The first of the plurality of bone knives (20) includes a first handle (211) and a first blade (212), wherein the first blade (212) is provided with a first arc-shaped blade (213) and a first inclined blade (214) connected to the first arc-shaped blade (213). The second bone knife (20) among the plurality of bone knives (20) includes a second handle (221) and a second blade (222). The second blade (222) is provided with a second arc-shaped blade (223) and a second inclined blade (224) connected to the second arc-shaped blade (223). The inclination direction of the second inclined blade (224) is opposite to the inclination direction of the first inclined blade (214). The third of the plurality of bone knives (20) includes a third handle (231) and a third blade (232), wherein the third blade (232) is provided with a U-shaped blade (233). The fourth bone knife (20) of the plurality of bone knives (20) includes a fourth handle (241) and a fourth blade (242), wherein the fourth blade (242) is provided with a first straight blade (243). The fifth bone knife (20) of the plurality of bone knives (20) includes a fifth handle (251) and a fifth blade (252), wherein the fifth blade (252) is provided with a vertically arranged second straight blade (253) and a third straight blade (254).

Images