Author: Silva L R Sousa P J Goncalves L M Minas G
Publisher: IOP Publishing
E-ISSN: 1361-6439|25|7|74007-74015
ISSN: 0960-1317
Source: Journal of Micromechanics and Microengineering, Vol.25, Iss.7, 2015-07, pp. : 74007-74015
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Abstract
This paper reports on an innovative approach to measuring intraluminal pressure in the upper gastrointestinal (GI) tract, especially monitoring GI motility and peristaltic movements. The proposed approach relies on thin-film aluminum strain gauges deposited on top of a Kapton membrane, which in turn lies on top of an SU-8 diaphragm-like structure. This structure enables the Kapton membrane to bend when pressure is applied, thereby affecting the strain gauges and effectively changing their electrical resistance. The sensor, with an area of 3.4 mm2, is fabricated using photolithography and standard microfabrication techniques (wet etching). It features a linear response (
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