RESPIRATION RATE EXTRACTION FROM CARDIAC SIGNALS
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United States of America Patent
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Issued Date -
Jun 4, 2015
app pub date -
May 28, 2013
filing date -
May 28, 2012
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Abandoned
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Abstract
At least two waveforms indicative of respiration are extracted from cardiac signals such as PPG or ECG. The extracted waveforms are converted into the frequency domain and multiplied together to form a combined frequency response function representing the frequency content of the combined respiratory waveform. Up to three peaks in the combined frequency response function are identified and averaged to provide an improved estimate of the breathing rate.
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