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- Title
Diagnostic Validity of an Isokinetic Testing to Identify Partial Anterior Cruciate Ligament Injuries.
- Authors
Scoz, Robson Dias; Amorim, Cesar F.; Mazziotti, Bruno O.A.; Da Silva, Rubens A.; Vieira, Edgar R.; Lopes, Alexandre D.; Gabriel, Ronaldo E.C.D.
- Abstract
Objective: To assess the diagnostic validity of an isokinetic testing to detect partial injuries on the anterior cruciate ligament (ACL). Design: Prospective diagnostic study. Settings: Orthopedic clinic, physiotherapy clinic, orthopedic hospital, and diagnostic/image clinic. Participants: Consecutive patients (n = 29) with unilateral knee complaint submitted to physical examination, magnetic resonance images (MRIs), and isokinetic testing prior to surgery of ACL reconstruction. Interventions: Not applicable. Main Outcome Measures: The isokinetic torque curves data from extensor and flexor muscles were converted to frequency domain by fast Fourier transformation and compared with healthy contralateral limb. Differences were categorized as unstable knees and these conclusions were compared with patient's physical examinations (doctor's conclusion on ACL integrity) and MRIs (as the radiologist conclusions on ACL integrity). After surgery, all intraoperatively confirmed partial injured patient's data were collected. The diagnostic accuracy measures to compare the conclusions of all 3 professionals included sensitivity, specificity, positive predictive value, negative predictive value, disease prevalence, positive likelihood ratio, and accuracy—all using a confidence interval of 95%. Results: Compared with MRI, the sensitivity of isokinetic test for an ACL partial injury was 90.00%, specificity 83.33%, positive predictive value 52.94%, negative predictive value 97.56%, and accuracy 84.48%. Compared with physical examination, the sensitivity of isokinetic test for an ACL partial injury was 85.71%, specificity 78.43%, positive predictive value 35.29%, negative predictive value 97.56%, and accuracy 79.31%. Conclusions: This method of isokinetic data analysis through fast Fourier transformation can be used to improve diagnostic accuracy of a difficult detection injury. Even present, a partial ACL injury can produce a stable knee during isokinetic testing and could be used to detect candidates for conservative treatment based on strengthening exercises, reducing surgery risks, and financial and social impact on patient's life.
- Subjects
GERMANY; ANTERIOR cruciate ligament injuries; CONFIDENCE intervals; EXERCISE tests; HOSPITALS; ISOKINETIC exercise; RANGE of motion of joints; KNEE; LONGITUDINAL method; MAGNETIC resonance imaging; MUSCLE contraction; MUSCLE strength testing; NONPARAMETRIC statistics; PHYSICAL diagnosis; RESEARCH evaluation; TORQUE; PREDICTIVE tests; DATA analysis software
- Publication
Journal of Sport Rehabilitation, 2020, Vol 29, Issue 8, p1086
- ISSN
1056-6716
- Publication type
Article
- DOI
10.1123/jsr.2019-0195