Key result
Non-invasive quantification of the pivot-shift test using a triaxial accelerometer demonstrated good reliability (mean intra-rater ICC 0.79) and differentiated ACL-deficient from healthy knees.
Why the study?
Does a non-invasive triaxial accelerometer methodology reliably quantify the pivot-shift test in patients with unilateral ACL injury compared to contralateral healthy limbs?
Observational (n=66)
Does a non-invasive triaxial accelerometer methodology reliably quantify the pivot-shift test in patients with unilateral ACL injury compared to contralateral healthy limbs?
Effect estimate: ICC 0.79
A novel non-invasive methodology using a triaxial accelerometer provides reliable quantification of the pivot-shift test in ACL-injured patients.
Supports accelerometer-based pivot-shift quantification in ACL injury; leaves open clinical adoption pending prospective validation.
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.
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Lopomo et al. (2011) conducted an observational in Anterior cruciate ligament (ACL) injury (n=66). Non-invasive quantification of pivot-shift test using a triaxial accelerometer vs. Contralateral healthy limbs was evaluated on Reliability of the method (intra-rater intraclass correlation coefficient) (ICC 0.79). Non-invasive quantification of the pivot-shift test using a triaxial accelerometer demonstrated good reliability (mean intra-rater ICC 0.79) and differentiated ACL-deficient from healthy knees.
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