Method and system for monitoring sleep
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United States of America Patent
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Jul 1, 2014
Grant Date -
Feb 11, 2010
app pub date -
Mar 6, 2008
filing date -
Mar 7, 2007
priority date (Note) -
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Abstract
A method of monitoring sleep of a sleeping subject is disclosed. The method comprises determining a phase shift of input radiofrequency signals received from the subject during sleep relative to output radiofrequency signals transmitted to the subject during sleep, calculating cardiac output based on the phase shift, and using the cardiac output for identifying sleep apnea events.
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