Determining Accuracy and Repeatability of an Instrumented Knee Brace

Up to 250,000 anterior cruciate ligament (ACL) injuries occur in the United States annually, with many injured individuals undergoing ACL reconstruction (ACLR) surgery. Physicians often prescribe braces for ACLR patients during return to sport, as brace wear has been shown to improve movement mechanics and reduce the risk of a second injury. However, brace compliance remains an issue and currently there is no way to monitor compliance and activity levels in ACLR patients. Therefore, the purpose of this study is to determine if an instrumented knee brace can accurately measure activity through step count and knee angles, and to determine if it is valid compared to motion capture technology and repeatable between days.