Results 191 to 200 of about 11,400 (246)

Photoplethysmography and nociception

Acta Anaesthesiologica Scandinavica, 2009
Photoplethysmography (PPG), i.e. pulse oximetric wave, is a non‐invasive technique that is used in anaesthesia monitoring primarily to monitor blood oxygenation. The PPG waveform resembles that of the arterial blood pressure but instead of pressure it is related to the volume changes in the measurement site and hence contains information related to the
I, Korhonen, A, Yli-Hankala
  +7 more sources

Photoplethysmography

Best Practice & Research Clinical Anaesthesiology, 2014
The photoplethysmographic (PPG) waveform, also known as the pulse oximeter waveform, is one of the most commonly displayed clinical waveforms. First described in the 1930s, the technology behind the waveform is simple. The waveform, as displayed on the modern pulse oximeter, is an amplified and highly filtered measurement of light absorption by the ...
Aymen A, Alian, Kirk H, Shelley
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Artifact reduction in photoplethysmography

Applied Optics, 1998
Motion artifact reduction in photoplethysmography, and therefore by implication in pulse oximetry, is achieved with a novel nonlinear methodology. The physical origins of the photoplethysmographic signals are explored in relation to a nonlinear measure of the observed intensity fluctuations.
M J, Hayes, P R, Smith
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Stochastic Modeling for Photoplethysmography Compression

2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020
Photoplethysmography (PPG) has been widely involved in health monitoring for clinical medicine and wearable devices. To make full use of PPG signals for diagnosis and health care, raw PPG waveforms have to be stored and transmitted in a storage and power-efficient way, which is data compression.
Ke Xu 0006, Xinyu Jiang, Chenyun Dai, Wei Chen 0015   +3 more
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Fingertip photoplethysmography and migraine

Journal of the Neurological Sciences, 2003
Whether migraine is accompanied by generalized disturbance of arteries throughout the body remains unclear. The second derivative of the fingertip photoplethysmography waveform (SDPTG) is now considered a useful tool for evaluating peripheral circulation.
Kan-ichiro, Komatsu, Toshio, Fukutake, Takamichi, Hattori   +2 more
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