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

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 piezore...

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Bibliographic Details
Published in:IEEE sensors journal 2017-04, Vol.17 (7), p.2191-2197
Main Authors: Khan, M. Waqas A., Sydanheimo, Lauri, Ukkonen, Leena, Bjorninen, Toni
Format: Article
Language:English
Subjects:
Biological effects
Computer simulation
Diagnostic software
Diagnostic systems
Dipole antennas
Environmental monitoring
External pressure
far-field data transmitter
inductive power link
Intracranial pressure
Intracranial pressure (ICP)
Iterative closest point algorithm
Monitoring
piezoresistive pressure sensor
Sensors
Wireless communication
Wireless sensor networks
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Summary: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 modeling 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 to 33 mmHg and assess the impact of an imperfectly aligned inductive link on the operation of the system.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2017.2661324