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Dual-mode operation of flexible piezoelectric polymer diaphragm for intracranial pressure measurement

Source: Appl. Phys. Lett. 96, 053502 (2010); doi:10.1063/1.3299003

Published 1 February 2010

KEYWORDS and PACS
Keywords
PACS
  • 87.85.Ox
    Biomedical instrumentation and transducers
  • 07.07.Df
    Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9628 (online)
Publisher:
AIP is a member of CrossRef AIP
Chunyan Li,1 Pei-Ming Wu,2 Lori A. Shutter,1 and Raj K. Narayan1
1Department of Neurosurgery, University of Cincinnati, Cincinnati, Ohio 45267, USA
2Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA
The dual-mode operation of a polyvinylidene fluoride trifluoroethylene (PVDF-TrFE) piezoelectric polymer diaphragm, in a capacitive or resonant mode, is reported as a flexible intracranial pressure (ICP) sensor. The pressure sensor using a capacitive mode exhibits a higher linearity and less power consumption than resonant mode operated pressure sensor. In contrast, the latter provides better sensitivity and easier adaption for wireless application. The metrological properties of the dual-mode ICP sensor being described are satisfactory in vitro. We propose that the piezoelectric polymer diaphragm has a promising future in intracranial pressure monitoring. ©2010 American Institute of Physics
History: Received 9 November 2009; accepted 6 January 2010; published 1 February 2010
Permalink: http://link.aip.org/link/?APPLAB/96/053502/1

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