Monitoring breathing rate by fusing the physiological impact of respiration on video-photoplethysmogram with head movements
Objective : The simple observation of breathing rate (BR) remains the first and often the most
sensitive marker of acute respiratory dysfunction. In fact, there is evidence that drastic changes
in BR are a predictive indicator of adverse events (i.e. cardiac arrest). The aim of this study is
to develop a camera-based technology that may provide near-continuous estimation of BR considering
the effect of respiration on video-PPG (vPPG). Approach : The technology has been tested in two
different experimental settings, including controlled BR and more challenging scenarios with
spontaneous breathing patterns. Video data were processed offline to derive the vPPG signal. The
method derives respiration from beat-to-beat PPG rate and morphology changes in amplitude and width
driven by the physiological relationships between vPPG and respiration. Moreover,
respiratory-induced head movements were used as an additional source of information for the vPPG
system. A combination o...
Source: Physiological Measurement - Category: Physiology Authors: Luca Iozza, Jes ús Lázaro, Luca Cerina, Davide Silvestri, Luca Mainardi, Pablo Laguna and Eduardo Gil Source Type: research