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Wireless sensor tracks forces at work in human joints
Source: Wall Street & Technology Online
HANCOCK, N.H. - A wireless strain sensor built into an artificial knee replacement is providing medical-prosthesis
engineers with their first view of real-time forces inside a human joint during normal activities.
The piezoelectric sensor design was provided by Microstrain Inc. (Williston, Vt.) for a project at the Scripps Clinic
Division of Orthopedic Surgery (San Diego). Force data from piezoelectric strips placed at strategic points in the knee
assembly is collected by a wireless sensor chip and transmitted to a computer for analysis.
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