An original clinical methodology for non-invasive assessment of pivot-shift test

Nicola Lopomo, Stefano Zaffagnini, Cecilia Signorelli, Simone Bignozzi, Giovanni Giordano, Giulio Marcheggiani Muccioli and Andrea Visani

Computer Methods in Biomechanics and Biomedical Engineering, 2012, vol. 15, issue 12, 1323-1328

Abstract: Even if pivot-shift (PS) test has been clinically used to specifically detect anterior cruciate ligament (ACL) injury, the main problem in using this combined test has been yet associated with the difficulty of clearly quantifying its outcome. The goal of this study was to describe an original non-invasive methodology used to quantify PS test, highlighting its possible clinical reliability. The method was validated on 66 consecutive unilateral ACL-injured patients. A commercial triaxial accelerometer was non-invasively mounted on patient's tibia, the corresponding 3D acceleration was acquired during PS test execution and a set of specific parameters were automatically identified on the signal to quantify the test. PS test was repeated three times on both injured and controlateral limbs. Reliability of the method was found to be good (mean intra-rater intraclass correlation coefficient was 0.79); moreover, we found that ACL-deficient knees presented statistically higher values for the identified parameters – than the controlateral healthy limbs, averagely reporting also large effect size.

Date: 2012
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DOI: 10.1080/10255842.2011.591788

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