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• W4366992968 endingPage "104814" @default.
• W4366992968 startingPage "104814" @default.
• W4366992968 abstract "A new algorithm to decompose the photoplethysmogram (PPG) pulse in two waves related with the systolic and diastolic parts, was applied to identify alterations in the morphology of the PPG pulse due to the pressure. Each pulse was decomposed into two waves: the first one a Gaussian related with the systolic peak, and the second one was modelled as a lognormal curve associated with the diastolic part. From these two waves, 13 parameters related with the width (W1, W2 and W2/W1), the time instant (T1, T2, T21, TBB), the amplitude (A1, A2, A2/A1) and the areas (D1, D2, D2/D1) were estimated. These parameters were computed from subjects inside a hyperbaric chamber, involving five stages at different pressure: 1 atm, 3 atm, 5 atm, 3 atm and 1 atm. There was a significant increase in the values of A1, A2, W1, T1, and D1, and a decrease in the ratios when the pressure increased, that suggest a vasoconstriction when the pressure increased. There is also an increase in the values of TBB, T2, T12, and W2 along the protocol, that implies a dependency of some parameters with the pulse-to-pulse interval. This methodology allows extracting a large set of parameters related with the PPG morphology that are affected by the change of pressure inside hyperbaric environments." @default.
• W4366992968 created "2023-04-27" @default.
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• W4366992968 date "2023-04-01" @default.
• W4366992968 modified "2023-10-01" @default.
• W4366992968 title "Decomposing photoplethysmogram waveforms into systolic and diastolic waves, with application to hyperbaric environments" @default.
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• W4366992968 doi "https://doi.org/10.1016/j.bspc.2023.104814" @default.
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