Acoustic physiological sensor
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United States of America Patent
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Jan 20, 2009
Grant Date -
Mar 3, 2005
app pub date -
Aug 26, 2003
filing date -
Aug 26, 2003
priority date (Note) -
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Abstract
This document describes, among other things, a body having at least one acoustically detectable property that changes in response to a change in a physiological condition, such as ischemia. The body is positioned with respect to a desired tissue region. At least one acoustic transducer is used to acoustically detect a change in physical property. In one example, the body is pH sensitive and/or ion selective. A shape or dimension of the body changes in response to pH and/or ionic concentration changes resulting from a change in an ischemia state. An indication of the physiological condition is provided to a user.
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