Preprint Article Version 1 This version is not peer-reviewed

An Integrated Wireless, Full-Range, Capacitive Sensor System Designed for Measuring Ventricular Pressure

Version 1 : Received: 5 July 2018 / Approved: 6 July 2018 / Online: 6 July 2018 (07:42:03 CEST)

A peer-reviewed article of this Preprint also exists.

Hernández-Sebastián, N.; Díaz-Alonso, D.; Renero-Carrillo, F.J.; Villa-Villaseñor, N.; Calleja-Arriaga, W. Design and Simulation of an Integrated Wireless Capacitive Sensors Array for Measuring Ventricular Pressure. Sensors 2018, 18, 2781. Hernández-Sebastián, N.; Díaz-Alonso, D.; Renero-Carrillo, F.J.; Villa-Villaseñor, N.; Calleja-Arriaga, W. Design and Simulation of an Integrated Wireless Capacitive Sensors Array for Measuring Ventricular Pressure. Sensors 2018, 18, 2781.

Journal reference: Sensors 2018, 18, 2781
DOI: 10.3390/s18092781

Abstract

This paper reports the novel design of a touch mode capacitive pressure sensor (TMCPS) system with a wireless approach for a full-range continuous monitoring of ventricular pressure. The system consists of two modules: an implantable set and an external reading device. The implantable set, restricted to a 2x2 cm2 area, consists of a TMCPS array connected with a dual-layer coil, for making a reliable resonant circuit for communication with the external device. The capacitive array is modelled considering the small deflection regime for achieving a dynamic and full 5-300 mmHg pressure range. In this design, the two inductive-coupled modules are calculated considering proper electromagnetic alignment, based on two planar coils and considering the following: 13.56 MHz frequency to avoid tissue damage and three types of biological tissue as core (skin, fat and muscle). The system was validated with the Comsol Multiphysics and CoventorWare softwares; showing a 90% power transmission efficiency at a 3.5 cm distance between coils. The implantable module includes aluminum- and polyimide-based devices, which allows ergonomic, robust, reproducible, and technologically feasible integrated sensors. In addition, the module shows a simplified and low cost design approach based on PolyMEMS INAOE® technology, featured by low-temperature processing.

Subject Areas

RF MEMS; pressure sensor; MEMS resonators; implantable BioMEMS; flexible electronics; touch mode capacitive sensor

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