Key result
A transmittance type infrared photoelectric plethysmograph successfully detected respiratory rhythm and waveform from the peripheral volume pulse signal, confirmed against a thermistor.
Why the study?
Does a transmittance type infrared photoelectric plethysmograph accurately detect respiratory rhythm and waveform compared to a thermistor?
Does a transmittance type infrared photoelectric plethysmograph accurately detect respiratory rhythm and waveform compared to a thermistor?
A transmittance type infrared photoelectric plethysmograph can noninvasively monitor respiratory rhythm and waveform from the peripheral finger volume pulse.
Answers are grounded in this paper and cite their sources.
May enable noninvasive respiratory monitoring via finger pulse; hypothesis-generating and requires prospective validation before clinical adoption.
A transmittance type infrared photoelectric plethysmograph (PPG) is described that performs time and frequency analysis of the peripheral finger volume pulse using an IBM 386 computer. It was revealed that in addition to the heart action the respiratory rhythm and waveform could be obtained from the peripheral volume pulse signal. This result was confirmed with the aid of a true respiration signal from a thermistor in different experiments: (1) varying breathing rates; (2) breathing-stop. The authors conclude that their new method may be useful for clinical noninvasive breath monitoring.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Barschdorff et al. (2002) studied this question. Transmittance type infrared photoelectric plethysmograph (PPG) vs. Thermistor was evaluated on Respiratory rhythm and waveform detection. A transmittance type infrared photoelectric plethysmograph successfully detected respiratory rhythm and waveform from the peripheral volume pulse signal, confirmed against a thermistor.
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