| Inductively coupled microfluidic pressure meter for in vivo monitoring of cerebrospinal fluid shunt function. | |
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MedLine Citation:
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PMID: 22316101 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A microfluidic pressure sensor with inductively coupled, wireless readout capability has been developed for integration into cerebrospinal fluid shunt valve implants. The sensor consists of a deformable PDMS film that is bonded over a microfluidic reservoir, forming a fluidic capacitor. Deflection of the capacitor membrane is detected remotely through a shift in the resonance frequency of a micro-fabricated LC circuit. Sensors were fabricated by a combination of conventional MEMS technologies and rapid soft lithography. A direct pattern transfer technique was used to pattern the deformable PDMS film with a metal coating for the capacitive readout. The mechanical response of the fluidic capacitor was characterized by measuring the deflection of the PDMS film using an extrinsic Fabry-Perot interferometer (EFPI), and wireless sensing was demonstrated by the shift in resonance frequency of the sensor via an inductively coupled antenna. The sensor transduces pressure into a change in resonant frequency with sensitivity > 3.4 ppm Pa(-1) and responsivity 4.6 kHz Pa(-1), over a dynamic range of 0 ~ 3 kPa. |
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Authors:
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S-H Song; G T Gillies; M R Begley; M Utz; W C Broaddus |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-9 |
Journal Detail:
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Title: Journal of medical engineering & technology Volume: - ISSN: 1464-522X ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7702125 Medline TA: J Med Eng Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Mechanical and Aerospace Engineering, University of Virginia , Charlottesville VA 22904 , USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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