White B F, Brown D W, Hundal M, Johnson R J, Pope M H
Med Instrum. 1979 Jul-Aug;13(4):227-31.
A device is described that measures the mechanical impedance of the human knee in vivo. The device and method were tested in a reliability study, on a normal control population, and in a follow-up test of previously injured subjects. Finally, impedance measurement was compared with the clinical examination, the currently employed test for ligament injuries. This impedance method to measure ligament stiffness was found useful in diagnosing acute injuries.
