Laxity Objective Measurement Within MRI of ACL Lesions

Joint laxity should be distinguished from instability and its objective assessment is a determinant of safety and effectiveness clinical management of anterior cruciate ligament (ACL) tear and other often injured structures through injury mechanisms as knee sprains. Clinical evaluation is mandatory for all clinicians but requires the addition of medical devices for diagnosis or follow-up workflow objective assessment. Magnetic resonance imaging (MRI) instrumented-assessment of knee joint laxity combines the visual inspection of structural injury and multiplanar joint laxity quantification. The Porto knee Testing Device (PKTD) is an MRI-safe knee arthrometer that provides for accurate measurement of multiplanar joint laxity. Restoration of passive knee sagittal and transversal knee stability is the main objective of surgical interventions addressing ligaments reconstruction as ACL and pre- and post-operative measurements should be systematically performed and support precision orthopedic medicine.