Selectively actuating wireless, passive implantable sensor
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United States of America Patent
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Mar 11, 2014
Grant Date -
May 19, 2011
app pub date -
Nov 15, 2010
filing date -
Nov 16, 2009
priority date (Note) -
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Abstract
A wireless sensor having a primary passive electrical resonant circuit that has an intrinsic electrical property that is variable in response to a characteristic of a patient and a secondary passive electrical resonant circuit. In one aspect, the primary passive resonant circuit can be positioned into a tuned position in response to the actuation of the secondary passive electrical resonant circuit. In a further aspect, in the tuned position, the primary passive electrical resonant circuit, in response to an energizing signal produced by an ex-vivo source of RF energy, is configured to generate a sensor signal characterized by a resonant frequency that is indicative of the characteristic.
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