Photoplethysmography and its application in clinical physiological measurement

@article{Allen2007PhotoplethysmographyAI,
  title={Photoplethysmography and its application in clinical physiological measurement},
  author={John Allen},
  journal={Physiological Measurement},
  year={2007},
  volume={28},
  pages={R1 - R39}
}
  • John Allen
  • Published 20 February 2007
  • Medicine
  • 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… 

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...

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