Design and test of a MEMS strain-sensing device for monitoring artificial knee implants

This paper describes the development of a polyimide-based MEMS strain-sensing device. Finite element analysis was used to investigate an artificial knee implant and assist on device design and to optimize sensing characteristics. The sensing element of the device was fabricated using polyimide micromachining with embedded thin-metallic wires and placed into a knee prosthesis. The device was evaluated experimentally in a mechanical knee simulator using static and dynamic axial load conditions similar to those encountered in vivo. Results indicates the sensor is capable of measuring the strain associated to the total axial forces in the range of approximately 4 times body weight with a good sensitivity and accuracy for events happening within 1 s time window.


Published in:
Biomedical Microdevices, 15, 5, 831-839
Year:
2013
Publisher:
Dordrecht, Springer
ISSN:
1572-8781
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2013-09-23, last modified 2018-09-13

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