info:eu-repo/semantics/article
Design and simulation of an integrated wireless capacitive sensors array for measuring ventricular pressure
Autor
NATIELY HERNANDEZ SEBASTIAN
Daniela Diaz_Alonso
Francisco-J Renero-C
Noé Villa_Villaseñor
WILFRIDO CALLEJA ARRIAGA
Institución
Resumen
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 2 2 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. Author Contributions: N.H.-S.: Conceptualization, Formal analysis, Investigation, Methodology, Software, Visualization andWriting original draft. D.D.-A.: Formal analysis, Investigation, Methodology and Validation. F.J.R.-C.: Investigation, Resources and Validation; N.V.-V.: Software, Resources and Validation. W.C. A.: Project administration, Resource, Supervision, Visualization, Writing-review and editing. Acknowledgments: Natiely Hernandez Sebastián acknowledges Conacyt program scholarship #549792
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