Implantable cardiac device adapted to extract a patient's respiratory waveforms from an intrathoracic or intracardiac impedance, pressure and/or accelerometry input stream
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United States of America Patent
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May 21, 2019
Grant Date -
Oct 16, 2014
app pub date -
Apr 10, 2014
filing date -
Apr 16, 2013
priority date (Note) -
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Abstract
An implantable cardiac device is provided. The implantable cardiac device includes a sensing unit adapted to measure an intrathoracic or intracardiac impedance, pressure, and/or accelerometry input stream, which includes a patient's respiratory waveforms. Furthermore, the implantable cardiac device includes a quantizer-unit adapted to sample the input stream with an initial sampling frequency Fs, providing input samples of the input stream. The implantable cardiac device further includes a filter bank 50 suited to perform a streaming Wavelet transformation on the input samples on a sample-by-sample basis, using the initial sampling frequency Fs provided by the quantizer-unit, wherein the streaming Wavelet transformation is adapted to perform a source separation, extracting, and separating the respiratory waveforms of the input stream.
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