Photoplethysmography and its application in clinical physiological measurement.

  title={Photoplethysmography and its application in clinical physiological measurement.},
  author={John Allen},
  journal={Physiological measurement},
  volume={28 3},
  • John Allen
  • Published 2007 in Physiological measurement
Photoplethysmography (PPG) is a simple and low-cost optical technique that can be used to detect blood volume changes in the microvascular bed of tissue. It is often used non-invasively to make measurements at the skin surface. The PPG waveform comprises a pulsatile ('AC') physiological waveform attributed to cardiac synchronous changes in the blood volume with each heart beat, and is superimposed on a slowly varying ('DC') baseline with various lower frequency components attributed to… CONTINUE READING
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