Gap-adjustable knee joint pressure measuring device for total knee joint replacement

Abstract

The present invention discloses a gap-adjustable knee joint pressure measuring device for total knee joint replacement. The gap-adjustable knee joint pressure measuring device comprises a tibia keel processing tool and a pressure measuring device, the pressure measuring device comprises a push block, a femur test pad and a tibia test pad, shape of the tibia keel processing tool is adapted to a tibial resected surface, and a front part of an upper surface of the push block is inclinedly arranged downward to form a support inclined surface; and the tibia test pad comprises a tibia pad body, a longitudinal rod, a handle, a push rod, a digital display screen, two push block guide grooves, two guide columns and two elastic positioning columns, the tibia pad body, the longitudinal rod and the handle are sequentially connected from front to back, and the push block is arranged in the push block guide groove in a back-and-forth moving mode. The gap-adjustable knee joint pressure measuring device for the total knee joint replacement is simple in structure and easy for use and cleaning, and thickness of the pressure measuring device can be controlled by adjusting positions of the push blockin the pressure measuring device, thereby detecting pressures of medial and lateral condyles of femur under the corresponding thickness.

Description

technical field [0001] The invention relates to a knee joint pressure measuring device for total knee arthroplasty with adjustable clearance. Background technique [0002] In knee joint diseases, degeneration of the knee joint leading to knee osteoarthritis is the main cause of leg and foot pain in elderly patients. With an increasingly aging population, the number of patients suffering from knee osteoarthritis is increasing. In terms of knee joint treatment, total knee arthroplasty is currently one of the more successful surgical methods for treating knee joint diseases. During the operation, a femoral prosthesis is used to replace the femoral surface, and a tibial prosthesis and tibial spacer are used to replace the tibial surface. Femoral prosthesis The interface with the tibial spacer constitutes the postoperative knee joint plane. Total knee arthroplasty can reduce knee pain and greatly improve the quality of life of patients. However, the knee joint is a complex joi...

AI Technical Summary

Problems solved by technology

[0005] (1) During the current operation, some operators usually experience the tension of the inner and outer soft tissues of the knee joint with their bare hands when the knee joint is straightened and flexed to 90 degrees, which brings instability to the soft tissue balance

[0006] (2) The thickness of the tibial spacer test mold cannot be adjusted for the devices on the market that assist soft tissue balance. If a tibial spacer of a certain thickness is not suitable for the knee joint after osteotomy, the tibial spacer needs to be taken out and replaced. Insert another thickness of the tibial spacer for testing, increasing the cumbersomeness of the operation

[0007] (3) The signal receiving and displaying device in the knee joint manometry device for total knee arthroplasty mentioned in some patents needs to be connected to an external computer display screen and host computer, resulting in huge redundancy of equipment and occupying the already limited space in the operating room

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