Stable knee joint shin offset amount measurement device

Abstract

The invention discloses a stable knee joint shin offset amount measurement device which comprises a measurement seat, wherein a measurement mechanism and a positioning mechanism are arranged on the measurement seat. The positioning mechanism comprises a three-point positioning mechanism and a flexible positioning mechanism. The flexible positioning mechanism comprises a flexible positioning layer for adapting to patient leg types automatically. The three-point positioning mechanism comprises a top positioning head matched with a knee joint shin tubercle and a positioning support rotatably arranged on the bottom surface of the measurement seat in matching mode, and two ankle positioning heads matched with ankle joints are respectively arranged on the positioning support. The measurement mechanism comprises an axial measurement mechanism used for measuring front and back axial looseness of knee joints and a circumferential measurement mechanism used for measuring circumferential looseness of knee joints. The axial measurement mechanism comprises a measurement sliding block, the circumferential measurement mechanism comprises a measurement rod rotatably arranged on the measurement sliding block in matched mode, and a measurement head matched with patella is arranged at one end of the measurement rod facing to the knee joints. A metering device used for measuring the position of the measurement sliding block and the rotating angle of the measurement rod is further arranged on the measurement seat.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a stable knee tibial offset measurement device. Background technique [0002] Knee cruciate ligament injury will cause anterior-posterior axial instability and laxity, and the measurement of the anterior-posterior axial laxity offset of the knee joint plays a very important role in diagnosing knee cruciate ligament injury. At present, the more accurate physical examination method is Lachman's examination, but this simple examination is more subjective and cannot be quantified. Therefore, the KT1000 joint activity measuring instrument and the KT2000 joint activity measuring instrument have appeared on the market, which can objectively quantify the front and rear of the knee joint. The accurate reading of axial laxity provides a reliable basis for the diagnosis of knee cruciate ligament injury. [0003] However, after research, it has been found that the injury...

AI Technical Summary

Problems solved by technology

At present, the more accurate physical examination method is Lachman's examination, but this simple examination is more subjective and cannot be quantified. Therefore, the KT1000 joint activity measuring instrument and the KT2000 joint activity measuring instrument have appeared on the market, which can objectively quantify the front and rear of the knee joint. Accurate reading of axial laxity, providing a reliable basis for the diagnosis of knee cruciate ligament injuries

[0003] However, after research, it was found that the injury of the cruciate ligament of the knee joint would not only cause relaxation in the anteroposterior axis, but also cause laxity in the circumferential direction of the knee joint, that is, the circumferential deflection of the knee joint at a certain angle

Therefore, the current data that only measure the anteroposterior and circumferential laxity of the knee joint cannot fully reflect the degree of injury of the cruciate ligament of the knee joint.

[0004] In addition, the existing KT1000 joint activity measuring device and KT2000 joint activity measuring device are only fixed on the patient's lower leg by straps. On the one hand, there are defects of inaccurate positioning, that is, the installation positions on the two legs of the patient are inconsistent On the other hand, there is a defect of shaking (easy to slide) during the measurement

These defects will lead to inconsistencies in the measurement benchmarks of the patient's two legs, and the obtained measurement results will also have large errors

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