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Photoplethysmography

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Definition: Plethysmographic determination in which the intensity of light reflected from the skin surface and the red cells below is measured to determine the blood volume of the respective area. There are two types, transmission and reflectance.  to determine local blood volume; NIM; /drug eff /rad eff permitted; do not use /util except by MeSH definition; DF: PHOTOPLETHYSMOGR    Other names Rheographies, Light Reflection; Photoreflexometries; Photoplethysmographies; Light Reflection Rheographies; Rheography, Light Reflection; Photoreflexometry; Light Reflection Rheography

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