- photoplethysmograph
- pho·to·ple·thys·mo·graph (fo″to-plə-thizґmo-graf) the diode and sensor apparatus used in photoplethysmography.
Medical dictionary. 2011.
photoplethysmograph
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Photoplethysmograph — A photoplethysmograph (PPG) is an optically obtained plethysmograph, a volumetric measurement of an organ. A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption (Shelley and Shelley … Wikipedia
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