| abstract |
A medical implant system, for instance, an orthopedic device, including an improved passive sensing system is disclosed. In one embodiment, a medical implant system may include a bone fixation device, a sensor coupled to the bone fixation device to passively measure a force imparted on the bone fixation device by a bone structure, the sensor comprising a resonator circuit having a pair of opposing coils separated by a distance and an insulating layer arranged between the opposing coils, the distance to change responsive to the force, the resonator circuit to generate a resonance frequency responsive to exposure to a radiofrequency (RF) field, the resonance frequency to modulate based on the distance. A change in resonant frequency from the sensor (LC sensor coils) that occurs from a biomechanical load can be detected wirelessly to determine the progression of healing of a bone structure. Other embodiments are described. |