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Inductively Powered Pressure Sensing System Integrating a Far-Field Data Transmitter for Monitoring of Intracranial Pressure

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Original languageEnglish
Pages (from-to)2191-2197
JournalIEEE Sensors Journal
Issue number7
Publication statusPublished - 2017
Publication typeA1 Journal article-refereed


Monitoring of intracranial pressure (ICP) provides a life-saving diagnostic tool. We present a battery-free pressure sensing system for minimally invasive ICP monitoring. It comprises a cranially concealed wireless pressure sensor and on- and off-body external units. The sensor is based on a piezoresistive element and is inductively powered through an on-body unit. It is also equipped with a far-field antenna which conveys the pressure data to the off-body unit. We present the electromagnetic modelling of the system and report results from experiments carried out in a setting which mimics the biological operation environment. The simulation and measurement results demonstrate the wireless pressure monitoring at a distance up to one meter over the pressure range from −3 mmHg to 33 mmHg and assess the impact of an imperfectly aligned inductive link on the operation of the system.

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