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Induction powered biological radiosondeAn induction powered implanted monitor for epidurally measuring intracranial pressure and telemetering the pressure information to a remote readout is disclosed. The monitor utilizes an inductance-capacitance (L-C) oscillator in which the C comprises a variable capacitance transducer, one electrode of which is a small stiff pressure responsive diaphragm. The oscillator is isolated from a transmitting tank circuit by a buffer circuit and all electric components in the implanted unit except an input and an output coil are shielded by a metal housing.
Document ID
19800010415
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Fryer, T. B. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 4, 2013
Publication Date
February 5, 1980
Subject Category
Aerospace Medicine
Report/Patent Number
Patent Number: NASA-CASE-ARC-11120-1
Patent Application Number: US-PATENT-APPL-SN-796256
Patent Number: US-PATENT-4,186,749
Accession Number
80N18691
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-ARC-11120-1|US-PATENT-4,186,749
Patent Application
US-PATENT-APPL-SN-796256

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