130183 20260219073010.0 ENGINEERING, BIOMEDICAL 32 / 124 = 0.258 2024 Q2 T1 4.9 2024 Biomedical Engineering 2024 Q1 Signal Processing 2024 Q1 Health Informatics 2024 Q1 1.229 2024 11.5 2024 ARTICLE (orcid)0000-0002-0690-3193 Peláez-Coca, María Dolores (orcid)0000-0001-7285-0715 Gil, Eduardo Universidad de Zaragoza ART-2024-133470 1502994 http://zaguan.unizar.es/record/130183/files/texto_completo.pdf Postprint info:eu-repo/date/embargoEnd/2024-04-25 3433874 http://zaguan.unizar.es/record/130183/files/texto_completo.jpg?subformat=icon icon Postprint info:eu-repo/date/embargoEnd/2024-04-25 2026-02-17-20:19:12 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Objective: 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. Approach: 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. Main results: 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 , T2, T12, and W2 along the protocol, that implies a dependency of some parameters with the pulse-to-pulse interval. Significance: 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. Access copy available to the general public Unrestricted 88, C (2024), 104814 [9 pp.] Biomed. signal proces. control Biomedical Signal Processing and Control 1746-8094 5007 520 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Ingen.Sistemas y Automát. Decomposing photoplethysmogram waveforms into systolic and diastolic waves, with application to hyperbaric environments doi 10.1016/j.bspc.2023.104814 sideral 133470 2024 (orcid)0000-0003-2596-7237 Hernando, Alberto eng oai:zaguan.unizar.es:130183 articulos driver info:eu-repo/grantAgreement/ES/DGA-FSE/T39-20R-BSICoS group info:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-095936-B-I00 info:eu-repo/grantAgreement/ES/MINECO-FEDER/RTI2018-097723-B-I00 info:eu-repo/grantAgreement/ES/UZ/CUD2020-TEC-03 info:eu-repo/grantAgreement/ES/UZ/CUD2020-11