Patent ID: 9636042
Date: 2017-05-02
CPC Classifications: A61B

Claim:
1. A method of determining a respiratory rate, the method comprising: A0. measuring, with a pneumograph, respiratory waveform data; A1. sampling the respiratory waveform data with a physiological parameters monitor; B1. detecting respiratory cycles comprising segments of sampled respiratory waveform data corresponding to amounts of time between at least one of adjacent peaks and adjacent valleys of the sampled respiratory waveform data; C1. calculating a variation degree indicating a degree of variation between sample points for groups of sample points of the sampled respiratory waveform data; D1. determining a base length computed as a function of at least the variation degree, wherein the higher the variation degree is, the faster the base length increases with an increase in a respiratory rate corresponding to the respiratory waveform data; E1. calculating a smoothed length based, at least in part, on the base length; F1. calculating a real-time degree for each of the detected respiratory cycles based, at least in part, on the variation degree, a sequence number of each of the detected respiratory cycles, and the smoothed length; and G1. calculating respiratory rate based, at least in part, on the smoothed length and the calculated real-time degrees.