Implantable SAW sensor for telemetry of temperature and blood pressure: The ANR-TECSAN CIMPA project

Abstract : The CIMPA Project (2007-2008), led under the ANR-TECSAN Call, was coordinated by SENSeOR, in partnership with the LEAT and the FEMTO. The aim of the project was to develop a surface acoustic wave sensor demonstrator, passive implantable to monitoring the blood pressure and the temperature. This sensor uses the surface acoustic wave technology (SAW) and is composed of three resonators using quartz as piezoelectric substrate. One resonator for temperature measurement (T), a second resonator for the blood pressure measurement (P) and a third resonator, which is used as reference (R). This sensor is compatible with size requirements inherent to an implantation in an artery, since the size of the resonator with its antennas in its most compact configuration is of the order of 5.2mm×3.7mm×0.85mm. It requires no embarked sources of energy and being able to be interrogated by a radiofréquence (RF) connection thanks to a transceiver, which emits a signal in the band industrial, scientific and medical (ISM). The sensor (connected to an integrated antenna on quartz of very small dimension) requested by the signal of interrogation emits in its turn a signal, which carries information of pressure and temperature. The transceiver then collects apart from its transmitting phase the signal emitted by the sensor and extracts by an appropriate signal processing method information of pressure and temperature. The targeted range for pressure measurement extends from 1bar to 1.35bar with an accuracy of about 2% FS.
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Submitted on : Tuesday, May 25, 2010 - 3:21:55 PM
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S. Tourette, L. Chommeloux, J.-F. Le Guen, J.-M. Friedt, P. Ménage, et al.. Implantable SAW sensor for telemetry of temperature and blood pressure: The ANR-TECSAN CIMPA project. IRBM, Elsevier Masson, 2010, 31 (2), pp.101-106. ⟨10.1016/j.irbm.2010.02.006⟩. ⟨hal-00486328⟩

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