Absolute calibrated tissue oxygen saturation and total hemoglobin volume fraction
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United States of America Patent
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Jan 1, 2013
Grant Date -
Dec 16, 2010
app pub date -
Jun 10, 2010
filing date -
Jun 10, 2009
priority date (Note) -
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Abstract
A medical device for monitoring a patient condition includes a first combination of a light source and a light detector to emit light into a volume of tissue, detect light scattered by the volume of tissue, and provide a first output signal corresponding to an intensity of the detected light. A control module is coupled to the light source to control the light source to emit light at least four spaced-apart light wavelengths, and a monitoring module is coupled to the light detector to receive the output signal, compute a measure of tissue oxygenation in response to the light detector output signal, and detect tissue hypoxia using the measure of tissue oxygenation.
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