Device for removing residual bone cement in artificial knee joint revision

Abstract

The utility model provides a residual bone cement removing device in artificial knee joint revision, which comprises a mounting shell, a driving motor is arranged in the mounting shell, a turntable is arranged at the power output end of the driving motor, a pin shaft I is arranged on the turntable, and the pin shaft I is rotationally connected with one end of a connecting rod I; the other end of the first connecting rod is connected with one end of a second connecting rod through a second pin shaft, the other end of the second connecting rod is connected with one end of a repairing cutter, the repairing cutter comprises a main body rod, a cavity is formed in the main body rod, a cutting edge is arranged at the end, located outside the mounting shell, of the main body rod, and the main body rod is further provided with an air inlet communicated with the cavity and a plurality of exhaust ports; the air inlet is connected with an air outlet of the air delivery pump through an air delivery pipe; a guide frame I aiming at the main body rod and a guide frame II aiming at the connecting rod II are arranged in the mounting shell. According to the residual bone cement removing device in the artificial knee joint revision, the bone cement can be efficiently cleaned, so that the operation efficiency and effect are ensured, and the structural design is ingenious and practical.

Description

Technical Field

[0001] This utility model relates to the field of protective equipment technology, specifically to a device for removing residual bone cement during revision surgery of artificial knee joint. Background Technology

[0002] Total knee arthroplasty (TKA) is an effective treatment for severe knee osteoarthritis, effectively relieving pain, improving lower limb deformities, correcting lower limb alignment, restoring lower limb function, and improving patients' quality of life. TKA involves surgical osteotomy to install a metal prosthesis, restoring knee flexion and extension function. To facilitate early weight-bearing, bone cement is often applied between the prosthesis and the cancellous bone surface to achieve stable adhesion and meet mobility requirements. However, this procedure carries risks such as prosthesis loosening, infection, and fracture. If these occur, a revision surgery may be necessary. This revision surgery requires removing the prosthesis, scraping away the hardened bone cement from the cancellous bone surface, and preserving as much bone as possible to provide adequate support for the subsequent prosthesis placement. Clinically, during revision surgery, a bone chisel is used to loosen the metal prosthesis from the bone, allowing for its removal. Bone cement that has hardened on the surface of cancellous bone becomes tightly bonded to the bone over time as the bone grows and repairs, making it difficult to remove. Furthermore, if the bone cement remaining on the bone surface cannot be completely removed, it will affect the stability of the secondary metal prosthesis implanted during revision surgery, and in severe cases, may lead to surgical failure.

[0003] Currently, there are no specialized tools for removing bone cement in clinical practice. Instead, tools such as bone scalpels, bone chisels, and bone forceps are used for cleaning. These tools have the following problems: it is difficult to completely remove bone cement during the cleaning process, and sometimes over-cleaning occurs, damaging the bone tissue. In addition, if too much force is applied during traditional cleaning, bone scalpels and chisels can easily cause induced fractures. Through clinical practice, it has been found that a micro-vibration bone scalpel can be used for cleaning. The vibration loosens the hardened bone cement, allowing it to peel off from the cancellous bone surface on its own, thus minimizing bone damage.

[0004] Therefore, a device for removing residual bone cement during revision knee arthroplasty is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for removing residual bone cement during revision total knee arthroplasty. The specific solution is as follows:

[0006] A device for removing residual bone cement during revision total knee arthroplasty includes a mounting shell. A drive motor is housed within the mounting shell. A turntable is located at the power output end of the drive motor. A first pin is mounted on the turntable, and the first pin is rotatably connected to one end of a first connecting rod. The other end of the first connecting rod is connected to one end of a second connecting rod via a second pin. The other end of the second connecting rod is connected to one end of a repair blade. The repair blade includes a main rod with a cavity inside. A blade is located at the end of the main rod outside the mounting shell. The main rod also has an air inlet communicating with the cavity and multiple exhaust ports. The air inlet is connected to the outlet of an air pump via an air supply pipe. A guide frame 1 for the main rod and a guide frame 2 for the second connecting rod are located within the mounting shell. A handle is located at the bottom of the mounting shell.

[0007] Based on the above, the mounting housing is provided with a first switch for the drive motor and a second switch for the air pump.

[0008] Based on the above, the mounting shell and the handle are respectively provided with bracket one and bracket two for the gas transmission pipe.

[0009] Based on the above, the mounting housing is also provided with a guide port for the main body rod.

[0010] Based on the above, a filter screen is provided inside the air inlet of the air pump.

[0011] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0012] The device for removing residual bone cement in revision surgery of artificial knee joint provided by this utility model loosens the solidified bone cement by controlling the reciprocating vibration of the repair blade, thereby causing the bone cement to fall off the bone surface. In addition, the high-pressure gas output by the air pump can also clean up the fallen bone cement in time, thus ensuring the efficiency and effectiveness of the operation. Attached Figure Description

[0013] Figure 1 This is a top view of the overall structure of this utility model.

[0014] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0015] Figure 3 This is a schematic diagram of the repair knife in this utility model.

[0016] Figure 4 This is a schematic diagram of the external structure of this utility model.

[0017] In the diagram: 1. Mounting housing; 2. Handle; 4. Drive motor; 5. Turntable; 6. Connecting rod one; 7. Connecting rod two; 8. Guide frame one; 9. Guide frame two; 10. Repair knife; 10-1. Main body rod; 10-2. Cavity; 10-3. Air inlet; 10-4. Exhaust port; 10-5. Blade; 11. Guide port; 12. Air supply pipe; 13. Bracket one; 14. Bracket two; 15. Air pump; 16. Air inlet. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments. Example

[0019] like Figure 1-4 As shown, this utility model provides a device for removing residual bone cement in revision knee arthroplasty, including a mounting shell 1. A drive motor 4 is housed within the mounting shell 1. A turntable 5 is located at the power output end of the drive motor 4. A first pin is mounted on the turntable 5. The first pin is rotatably connected to one end of a first connecting rod 6. The other end of the first connecting rod 6 is connected to one end of a second connecting rod 7 via a second pin. The other end of the second connecting rod 7 is connected to one end of a repair blade 10. The repair blade 10 includes a main body rod 10-1. The main body rod 10-1 has a cavity 10-2 inside. One end of the main body rod 10-1 outside the mounting shell 1 is provided with a blade 10-5. The main body rod 10-1 is also provided with an air inlet 10-3 communicating with the cavity 10-2 and multiple exhaust ports 10-4. The air inlet 10-3 is connected to the air outlet of the air pump 15 through an air supply pipe 12. The mounting shell 1 is provided with a guide frame 8 for the main body rod 10-1 and a guide frame 9 for the connecting rod 7. The bottom of the mounting shell 1 is provided with a handle 2.

[0020] To facilitate the control of the drive motor 4 and the air pump 15, the mounting housing 1 is provided with a first switch 17 for the drive motor 4 and a second switch 18 for the air pump 15.

[0021] To facilitate the support and positioning of bracket 13 and bracket 214 for the operation of the device, bracket 13 and bracket 214 are respectively provided on the mounting shell 1 and handle 2 for the gas pipeline 12.

[0022] To ensure that the main rod 10-1 can extend and retract stably, a guide port 11 for the main rod 10-1 is also provided on the mounting shell 1.

[0023] To prevent dust and impurities from being carried in the gas discharged through the air pump 15, a filter screen is installed in the air inlet 16 of the air pump 15.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A device for removing residual bone cement during revision total knee arthroplasty, characterized in that: The device includes a mounting housing (1), a drive motor (4) is provided inside the mounting housing (1), a turntable (5) is provided at the power output end of the drive motor (4), a first pin is provided on the turntable (5), the first pin is rotatably connected to one end of a first connecting rod (6), the other end of the first connecting rod (6) is connected to one end of a second connecting rod (7) through a second pin, the other end of the second connecting rod (7) is connected to one end of a repair knife (10), the repair knife (10) includes a main body rod (10-1), and a cavity (10-2) is provided inside the main body rod (10-1). The main rod (10-1) is provided with a blade (10-5) at one end outside the mounting shell (1). The main rod (10-1) is also provided with an air inlet (10-3) communicating with the cavity (10-2) and multiple exhaust ports (10-4). The air inlet (10-3) is connected to the air outlet of the air pump (15) through the air supply pipe (12). The mounting shell (1) is provided with a guide frame one (8) for the main rod (10-1) and a guide frame two (9) for the connecting rod two (7). The bottom of the mounting shell (1) is provided with a handle (2).

2. The device for removing residual bone cement in revision total knee arthroplasty according to claim 1, characterized in that: The mounting housing (1) is provided with a first switch (17) for the drive motor (4) and a second switch (18) for the air pump (15).

3. The device for removing residual bone cement in revision total knee arthroplasty according to claim 1, characterized in that: The mounting housing (1) and handle (2) are respectively provided with bracket one (13) and bracket two (14) for the gas pipeline (12).

4. The device for removing residual bone cement in revision total knee arthroplasty according to claim 1, characterized in that: The mounting housing (1) is also provided with a guide port (11) for the main rod (10-1).

5. The device for removing residual bone cement in revision total knee arthroplasty according to claim 1, characterized in that: The air inlet (16) of the air pump (15) is equipped with a filter screen.

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