Respiratory Signal Processing Method
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United States of America Patent
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Issued Date -
Sep 30, 2010
app pub date -
May 21, 2009
filing date -
Mar 26, 2009
priority date (Note) -
Abandoned
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Abstract
This Invention relates to a respiratory signal processing method, including the following steps: A. Obtain the respiratory physiological signals by means of a specific respiratory circuit, AD collects and obtains the respiratory digital signals and applies the data preprocessing to such signals; B. Convert frequency spectrum of the preprocessed respiratory signals and obtain the distribution of their frequency domain; C. Judge whether there is asphyxia in accordance with the properties of respiratory signal's physiological parameters; D. Introduce the physiological parameters of heart activities and analyze frequency spectrum distribution of respiratory signals and judge whether there is any interference from heart activities; E. Analyze the spectral energy envelop of respiratory waveform and find out the correct spectral peak, and then convert the frequency point corresponding to the spectral peak to the respiratory rate so as to obtain the value of current respiratory rate by integrating with the previous values of respiratory rate. The processing methods under this Invention can maximize the accuracy of results of respiratory rate and improve the stability of such result remarkably.
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