Distracter for total knee joint replacement

Abstract

The invention discloses a distracter for total knee joint replacement. The distracter comprises a longitudinal supporting plate, a tibia-side component, a thighbone-side component, a first linear motor, a first movable rod and a control box. The tibia-side component and the thighbone-side component are connected with the supporting plate perpendicularly, a first longitudinal sliding groove is formed in the inner surface of the supporting plate, and the thighbone-side component is provided with a first projection portion which is mounted in the first sliding groove in an embedded manner. A motor shaft of the first linear motor is connected with a first push block, and a hinge joint portion is arranged at the upper end of the first push block. One end of the first movable rod is in hinge joint with the hinge joint portion of the first push block, and the other end of the first movable rod is in hinge joint with a first connecting block which is arranged on the inner surface of the thighbone-side component. The control box is electrically connected with the first linear motor, is used for controlling the first linear motor to move and is provided with a power source for providing power and a wireless component for information transmission. The distracter for total knee joint replacement in the technical scheme is capable of distracting the tibia side and the thighbone side stably and enabling the thighbone-side component to rotate, so that precision of the total knee joint replacement is improved.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a spreader in total knee arthroplasty. Background technique [0002] At present, artificial total knee replacement has become one of the surgical treatments for advanced degenerative osteoarthritis, rheumatoid arthritis, ankylosing spondylitis and other diseases. Since prolonged immobilization time and muscle exercises after surgery cannot correct soft tissue imbalances, the balance of soft tissues depends entirely on the surgery itself. Therefore, soft tissue balance is an extremely critical step in total knee arthroplasty. In total knee arthroplasty, the internal and external balance of the knee joint mainly depends on the experience of the chief surgeon to evaluate with both hands, and suitable and effective auxiliary tools are an important guarantee for the operation. [0003] At the same time, in the preoperative preparation stage, X-ray irradiation is usually performed to d...

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Problems solved by technology

[0003] At the same time, in the preoperative preparation stage, X-ray irradiation is usually performed to determine the condition and location of the problem in the knee joint, but it is difficult to accurately determine and locate the separation distance between the femoral side and the tibial side during the operation. However, if the deviation of the position during the operation exceeds 10%, it means a serious failure of the operation and has serious consequences.

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