Abstract
Summary Background Sports activities are the most common way to get an anterior cruciate ligament (ACL) injury. Correct diagnoses in the early phase after the knee injury is essential to establish a rehabilitation plan and, in the case of ACL-diagnosis, to avoid re-injuring the knee with increased risk of meniscal tears and/or osteoarthritis. The aim was to determine whether it is possible to confirm an ACL-injury with the Rolimeter measurements in the acute phase of a knee trauma, and if it correlates with magnetic resonance imaging (MRI) findings or arthroscopy. Material and Methods Thirty-four patients with an acute knee trauma, 20 women and 14 men, aged from 15–44 years, with a mean age of 24.8 (SD ± 7.3) participated. All were examined with the Rolimeter in the acute phase after a suspected ACL-injury. They also underwent MRI (n = 29) or arthroscopy (n = 5) wherein the injury was confirmed. Results A great consistency was seen in diagnosing the ACL-injuries with the Rolimeter measurement compared to MRI findings. The specificity (90.9%), sensitivity (91.3%), accuracy (91.2%), PPV (95.5%) and NPV (83.3%) were high in this study. Conclusions The Rolimeter measurement procedure is a safe and quick method in diagnosing an ACL-injury in the acute phase. Further studies should focus on larger cohorts and compare an early diagnosis to patient related outcome measures and societal/economical gains.
Highlights
Sports activities (70–75%) are the most common way to get an ACLinjury [8,19]
The Lachman test has a sensitivity of 77% in the acute knee injury, and the anterior drawer has a sensitivity of 22%, with the specificity still over 95% [13]
In the acute knee injury, Ericsson et al [7] showed a good reliability in repeated Rolimeter measurement, and suggested that the Rolimeter measurement in combination with a clinical examination could identify an anterior cruciate ligament (ACL)-injury in the early phase
Summary
Sports activities (70–75%) are the most common way to get an ACLinjury [8,19]. The injury incidence in Sweden is reported to be 80 ACLinjuries per 100,000 inhabitants [8]. The Lachman test and anterior drawer test the anterior-posterior laxity of the knee joint [16], with a sensitivity of 70–85% respectively 54% and a specificity of 97% respectively 95% regarding chronic knee injuries [13,21]. The Lachman test has a sensitivity of 77% in the acute knee injury, and the anterior drawer has a sensitivity of 22%, with the specificity still over 95% [13]. Kim et al [14] showed that the Lachman test is the most reliable and sensitive clinical test in chronic knee injuries with impact on the ACL. Magnetic Resonance Imaging (MRI) is highly accurate in diagnosing ACL-tears with a sensitivity of 86.5–94.4% and a specificity of 93–95.2% when compared to arthroscopic findings [24]. The Rolimeter measurement in the acute knee trauma phase has not been compared to either MRI or arthroscopic findings
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