IMPLANTABLE CARDIAC DEVICE ADAPTED TO EXTRACT A PATIENT'S RESPIRATORY WAVEFORMS FROM AN INTRATHORACIC OR INTRACARDIAC IMPEDANCE, PRESSURE AND/OR ACCELEROMETRY INPUT STREAM
First Claim
1. An implantable cardiac device, comprisinga sensing unit adapted to measure a physiological signal input stream, comprising a patient'"'"'s respiratory waveforms;
- a quantizer-unit adapted to sample the input stream with an initial sampling frequency Fs, providing input samples of the input stream; and
a filter bank 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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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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Citations
20 Claims
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1. An implantable cardiac device, comprising
a sensing unit adapted to measure a physiological signal input stream, comprising a patient'"'"'s respiratory waveforms; -
a quantizer-unit adapted to sample the input stream with an initial sampling frequency Fs, providing input samples of the input stream; and a filter bank 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising
measuring a physiological signal input stream, comprising a patient'"'"'s respiratory waveforms; -
sampling the input stream with an initial sampling frequency Fs, to provide input samples of the input stream; and performing a streaming Wavelet transformation on the input samples on a sample-by-sample basis, using the initial sampling frequency Fs, wherein the streaming Wavelet transformation is adapted to perform a source separation, extracting, and separating the respiratory waveforms of the input stream. - View Dependent Claims (18, 19, 20)
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Specification