Validity of an instrumented knee brace compared to 3D motion navigation: A cadaveric investigation

Nicolas Reneaud , Emma Pierre , Raphael Zory , Frédéric Chorin , Luc Thomas , Pascale Chavet (1) , Thelma Coyle (1) , Eric Truchet , Stephane Puech , Matthieu Ollivier (1) , Patrick Chabrand (1) , Pauline Gerus

1 ISM - Institut des Sciences du Mouvement Etienne Jules Marey

The aim of this study was to test the accuracy and the reliability of 3-dimensional angular measurements of an instrumented knee brace compared to the gold standard navigation system optoelectronic cameras-based. Thirteen cadaveric bodies were used to calculate kinematic knee parameters. Three exercises were performed, 100° flexion (FLEX100), internal/external rotation with a 30° flexion (ROT30), and the pivot shift test (PS). The reliability was excellent with an ICC (95%) > 0.90. The agreement between the two systems showed excellent correlation in the F/E axis for FLEX100 and PS (σ (Flex/Ext) > 0.95) and strong correlation in the I/E axis for ROT30 (σ (Rot Int/Ext) > 0.939). The root mean square error (RMSE) was under 5° for all exercises considering the soft tissue artifact (STA) for the F/E axis. Consequently, the instrumented knee brace exposed high reliability and accuracy which could end up on clinical interpretations thanks to the previous measures.

Mots clés: Navigation; Validity; Reliability; connected knee brace; Inertial measurement unit; Joint kinematics; Navigation

Domaines: Ingénierie biomédicale; Biomécanique [physics.med-ph]

Nicolas Reneaud, Emma Pierre, Raphael Zory, Frédéric Chorin, Luc Thomas, et al.. Validity of an instrumented knee brace compared to 3D motion navigation: A cadaveric investigation. Measurement, 2021, 173, pp.108590. ⟨10.1016/j.measurement.2020.108590⟩. ⟨hal-03140244⟩