DETECTION OF THE BEGINNING OF AN APNEA
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United States of America Patent
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Issued Date -
Mar 5, 2009
app pub date -
Mar 28, 2007
filing date -
Apr 12, 2006
priority date (Note) -
Abandoned
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Abstract
The beginning of an apnea can be recognized reliably if a series of sample values describing the breathing noise of a patient are processed in block-wise manner, and if a fingerprint with a predetermined number of fingerprint coefficients describing a waveform of the sample values within a block is determined for a number of sample values within the block. Since the number of fingerprint coefficients is smaller than the number of sample values within the block, comparison of the fingerprint coefficients with reference fingerprint coefficients characteristic for the waveform at the beginning of an apnea can be performed efficiently and reliably, in order to detect the beginning of the apnea.
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