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Evaluation of pivot shift in the anterior cruciate ligament-injured knee using inertial and magnetic sensors

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8 Author(s)
Kawano, K. ; Grad. Sch. of Eng., Univ. of Hyogo, Kobe ; Kobashi, S. ; Tsumori, Y. ; Shibanuma, N.
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The pivot shift test has been performed to assess the instability of the knee caused by anterior cruciate ligament (ACL) injuries. However, the test depends on the clinicianpsilas subjective feeling. In this study, inertial and magnetic sensors have been introduced into quantitative evaluation of the pivot shift test. The analysis method extracts the knee movement of the pivot shift by using wavelet transformation. In the result of applying the proposed method to the ACL injured subject, pivot shift phenomenon was detected correctly in comparison with reference video images taken simultaneously. In the quantitative assessment, the mean of the maximum acceleration during the pivot shift was 2.19 plusmn 0.69 m/s2, and the maximum acceleration values were correlated with grade scores based on the examinerpsilas subjective evaluation.

Published in:

Automation Congress, 2008. WAC 2008. World

Date of Conference:

Sept. 28 2008-Oct. 2 2008