18 April 2003 Micro-circulation of skin blood: optical monitoring by advanced photoplethysmography techniques
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Abstract
Blood micro-circulation in upper skin layers has been studied experimentally in real time by advanced two-channel photoplethysmography (PPG) techniques. The blood volume changes caused by micro-vessel expansion and dilution during the cardiac cycles have been detected by infrared optical contact sensors. A newly developed portable monitoring device comprising a lap-top computer was used for accumulation and processing of the bio-signals. Shapes of the PPG signals detected at different sites of the body were compared with these obtained by computer modeling.
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Janis Spigulis, Renars Erts, Uldis Rubins, "Micro-circulation of skin blood: optical monitoring by advanced photoplethysmography techniques", Proc. SPIE 5119, Bioengineered and Bioinspired Systems, (18 April 2003); doi: 10.1117/12.498725; https://doi.org/10.1117/12.498725
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