Abstract
In this paper we present for the first time a wireless self calibrating pressure sensor for biomedical applications. The proposed system consists of a piezoresistive pressure sensor implemented on a thin silicon membrane, a catheter tube and finally a protection capsule fabricated from a biocompatible polymer (PEEK). A double side flex with embedded conductors has been used to create the interconnections between the pressure sensor and the control circuit which is further connected to a wireless transceiver. The auto calibration capability of the proposed sensor enables to avoid the existing problem of drift with time and hence provides an excellent solution for long term monitoring. Moreover, the catheter of the proposed system has a reduced length of only 200mm in comparison to the 1m length for the existing wired solutions.
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