Gap balance measurer

Abstract

The invention discloses a gap balance measurer, which comprises a femur spreading plate and a tibia spreading plate, wherein a femur osteotomy reference plate is arranged at one end of the femur spreading plate; a tibia osteotomy reference plate is arranged at one end of the tibia spreading plate; an indication surface plate is arranged at the end, which is far away from the femur osteotomy reference plate, of the femur spreading plate; a gap between the femur spreading plate and the tibia spreading plate can be adjusted through a gap adjusting mechanism; a locking mechanism is arranged on one side, which is far away from the femur osteotomy reference plate, of the tibia spreading plate; a balance angle indicating mechanism is arranged between the femur osteotomy reference plate and the indication surface plate; a gap indicating mechanism is arranged on one side of the indication surface plate; and a tension indication mechanism is also arranged on one side of the indication surface plate. According to the gap balance measurer disclosed by the invention, whether the balance of soft tissues at the knee joint is met in an osteotomy process or not can be verified in a plurality of steps in a knee joint operation process, the balance state of the soft tissues is quantified, and a doctor is assisted in finding and placing the most accurate knee joint prosthesis.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a gap balance measuring device for artificial knee joint surgery. Background technique [0002] Artificial knee prosthesis replacement is a very complicated operation, the most critical of which is to determine the size and position of the femoral prosthesis. There are two traditional methods. The first is the measurement osteotomy method, which uses the appearance characteristics of the bone as the basis for measurement. The surgical tools are convenient and simple to operate, but the soft tissue needs to be loosened to adjust the balance of the knee joint tension during the operation, and the technical difficulty of loosening the soft tissue is very high and The effect is unstable, and once excessively loosened, it will cause instability of the knee joint; the second is the gap balance method, which directly uses the tension of the soft tissue at the knee joint to d...

AI Technical Summary

Problems solved by technology

The first is the measurement osteotomy method, which uses the appearance characteristics of the bone as the basis for measurement. The surgical tools are convenient and simple to operate, but the soft tissue needs to be loosened to adjust the balance of the knee joint tension during the operation, and the technical difficulty of loosening the soft tissue is very high and The effect is unstable, and once excessively loosened, it will cause instability of the knee joint; the second is the gap balance method, which directly uses the tension of the soft tissue at the knee joint to determine the position of the prosthesis, and can be obtained without excessive soft tissue adjustment. stable joint balance

However, the surgical tools and operations are relatively complicated, and high surgical techniques and years of experience are required. Otherwise, the misjudgment of the tension may cause excessive position deviation of the prosthesis, resulting in an unbalanced tension of the soft tissue at the joint.

[0003] Therefore, in knee replacement surgery, maintaining the balance of soft tissue is a very important factor, that is, it is necessary to ensure that the soft tissue at the knee joint has an appropriate tension under the gap of extension and flexion, and the balance of the inner and outer sides needs to be maintained. In the existing technology, the doctor judges whether the soft tissue is balanced through experience, and does not quantify the tension of the soft tissue, resulting in the judgment of the balance of the soft tissue being very dependent on the doctor's experience, which brings resistance to the replacement and development of knee joint surgery and has a wide impact Postoperative quality of life in joint patients

[0004] In the above background, some measuring tools for quantifying soft tissue tension have also appeared, but these tools are cumbersome to use and cannot provide multiple verifications. Therefore, the present invention proposes a gap balance measuring device to easily obtain the tension of soft tissue, combined with reference To assist doctors in judgment and decision-making, choose the most suitable size and position of the knee prosthesis, and finally obtain joint stability and balance

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