Med Biol Eng Comput - Deriving respiration from photoplethysmographic pulse width.

Tópicos

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Resumo

A method for deriving respiration from the pulse photoplethysmographic (PPG) signal is presented. This method is based on the pulse width variability (PWV), and it exploits the respiratory information present in the pulse wave velocity and dispersion. It allows to estimate respiration signal from only a pulse oximeter which is a cheap and comfortable sensor. Evaluation is performed over a database containing electrocardiogram (ECG), blood pressure (BP), PPG, and respiratory signals simultaneously recorded in 17 subjects during a tilt table test. Respiratory rate estimation error is computed obtaining of 1.27 ? 7.81% (0.14 ? 14.78 mHz). For comparison purposes, we have also obtained a respiratory rate estimation from other known methods which involve ECG, BP, or also PPG signals. In addition, we have also combined respiratory information derived from different methods which involve only PPG signal, obtaining a respiratory rate error of -0.17 ? 6.67% (-2.16 ? 12.69 mHz). The presented methods, PWV and combination of PPG derived respiration methods, avoid the need of ECG to derive respiration without degradation of the obtained estimates, so it is possible to have reliable respiration rate estimates from just the PPG signal.

Resumo Limpo

method deriv respir puls photoplethysmograph ppg signal present method base puls width variabl pwv exploit respiratori inform present puls wave veloc dispers allow estim respir signal puls oximet cheap comfort sensor evalu perform databas contain electrocardiogram ecg blood pressur bp ppg respiratori signal simultan record subject tilt tabl test respiratori rate estim error comput obtain mhz comparison purpos also obtain respiratori rate estim known method involv ecg bp also ppg signal addit also combin respiratori inform deriv differ method involv ppg signal obtain respiratori rate error mhz present method pwv combin ppg deriv respir method avoid need ecg deriv respir without degrad obtain estim possibl reliabl respir rate estim just ppg signal

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