Distraction device in knee joint replacement

Abstract

The invention relates to the technical field of distraction devices in knee joint replacement, in particular to a distraction device in knee joint replacement, which comprises distraction structures,a transmission structure, telescopic structures, a supporting structure, a driving structure and a limiting structure, wherein the supporting structure is arranged at the bottom end of a driving structure used for manual driving, the transmission structure is arranged in the supporting structure in a rotating connection mode, and the transmission structure is connected to the driving structure. The two ends of the transmission structure are connected to the telescopic structures used for adjusting the distraction distance, and the telescopic structures are connected to the supporting structure. Distraction structures used for distracting are arranged at the opposite ends of the two telescopic structures. The telescopic structures are matched with the supporting structure, so that the spaceutilization efficiency is improved; the driving structure drives the transmission structure conveniently, so that the transmission structure drives the two telescopic structures to adjust the distance between the two distraction structures, the distraction distance of the femur is adjusted conveniently, the operation flexibility is greatly improved, operation of medical staff is facilitated, andmeanwhile the structure is more stable.

Description

technical field [0001] The invention relates to the technical field of a spreader in knee joint replacement, in particular to a spreader in knee joint replacement. Background technique [0002] Artificial total knee replacement has become one of the surgical treatments for advanced degenerative osteoarthritis, rheumatoid arthritis, ankylosing spondylitis and other diseases; the soft tissue imbalance cannot be corrected due to prolonged immobilization time and muscle exercise after the operation The balance of soft tissue depends entirely on the operation itself; therefore, the balance of soft tissue in total knee replacement is an extremely critical step; the balance of the inner and outer sides of the knee joint in total knee replacement mainly depends on the experience of the surgeon. Appropriate and effective auxiliary tools are an important guarantee for the operation. At the same time, in the preoperative preparation stage, X-ray irradiation is generally performed to de...

AI Technical Summary

Problems solved by technology

[0002] Artificial total knee replacement has become one of the surgical treatments for advanced degenerative osteoarthritis, rheumatoid arthritis, ankylosing spondylitis and other diseases; the soft tissue imbalance cannot be corrected due to prolonged immobilization time and muscle exercise after the operation The balance of soft tissue depends entirely on the operation itself; therefore, the balance of soft tissue in total knee replacement is an extremely critical step; the balance of the inner and outer sides of the knee joint in total knee replacement mainly depends on the experience of the surgeon. Appropriate and effective auxiliary tools are an important guarantee for the operation. At the same time, in the preoperative preparation stage, X-ray irradiation is generally performed to determine the situation and location of the problem in the knee joint, but it is difficult to diagnose the femoral side during the operation. For example, the patent application No. 201510537181.6 discloses a spreader in total knee arthroplasty, including: a longitudinally arranged support plate; a tibial side component, It is vertically connected with the support plate; the femoral side part is vertically connected with the support plate, and the inner surface of the support plate is provided with a longitudinal first sliding groove. The femoral side part has a first protrusion, and the first protrusion is embedded in the first In the slide groove; the first linear motor, the motor shaft is connected with the first push block, the upper end of the first push block is provided with a hinge; the first movable rod, one end of which is hinged with the hinge of the first push block, and the other One end is hinged to the first connection block provided on the inner surface of the femoral component; the control box is electrically connected to the first linear motor, used to control the movement of the first linear motor, and has a power source for providing power and information Wireless components for transmission; its technical solution can stably spread the femoral and tibial sides, and can rotate the femoral side components, improving the accuracy of total knee arthroplasty

[0003] However, in the patent application number 201510537181.6, the femoral side part slides between the support plates, and the support plate takes up a large space, which is easy to cause damage to nearby tissues and affects the operation of medical staff. The stability of the transmission between the bones is poor, and the dependence on electric energy is large, so it is not easy to control the strength of the femur.

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