Thighbone and tibia gap balance dilator with pressure sensor

Abstract

The invention discloses a thighbone and tibia gap balance dilator with a pressure sensor, and relates to the technical field of medical instruments. The thighbone and tibia gap balance dilator comprises a first handle, a measuring rod, a second handle, a spiral spring, a fixing rod, the pressure sensor and a digital display meter, the first handle, the measuring rod and the second handle are hinged through a hinge shaft, a first supporting plate is arranged at the front end of the first handle, a second supporting plate is arranged at the front end of the measuring rod, a groove is formed in the inner side wall of the second handle, the pressure sensor is detachably arranged in the groove, one end of the spiral spring abuts against the pressure sensor, the other end of the spiral spring abuts against the tail end of the measuring rod, one end of the fixing rod is hinged to the rear end of the first handle, sawteeth engaged with the tail end of the second handle are arranged on the inner side of the fixing rod, the digital display meter is detachably arranged at the rear end of the measuring rod, and the pressure sensor is electrically connected with the digital display meter. The thighbone and tibia gap balance dilator can simultaneously indicate thighbone and tibia dilating distance, angle and surface pressure, is intuitive in data reading and convenient to use, and can be repeatedly disinfected and used.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a femoral and tibial gap balance spreader with a pressure sensor. Background technique [0002] Due to advanced degenerative osteoarthritis, rheumatoid arthritis, ankylosing spondylitis and other diseases, the cartilage of the knee joint will be destroyed, causing ligament imbalance, abnormal force line of the lower limbs, and limited flexion and extension activities. In order to restore the function of the lower limbs , total knee replacement surgery is required. During the operation, it is necessary to ensure the balance of flexion and extension of the reconstructed knee joint space. Only by internal and external balance can the artificial joint obtain better early stability. It is necessary to evaluate the symmetry of the flexion and extension gap and the Whether the tension on the medial and lateral ligaments is balanced. Excessive imbalance will accelerate the wear o...

AI Technical Summary

Problems solved by technology

[0003] Ordinary space spreaders generally only have the function of spreading, but not the function of measuring. When using the space spreader, it is easy to produce uneven distance between the left and right, and it is easy to cause inaccurate surgery. Although some spreaders are currently The distance of distraction was quantified, and the distance scale was marked on the distractor. However, during the intense operation process, the doctor did not intuitively read the data of the distance between the distractors on both sides, and it was easy to deviate. The distance scale, the fine control of the separation distance between the femoral side and the tibial side is not enough, it is easy to cause inaccurate surgery and affect the recovery of patients

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