Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments

The main aim of this work is to identify alterations in the morphology of the pulse photoplethysmogram (PPG) signal, due to the exposure of the subjects to a hyperbaric environment. Additionally, their Pulse Rate Variability (PRV) is analysed to characterise the response of their Autonomic Nervous S...

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Autores: Peláez-Coca, Mª Dolores, Hernando, Alberto, Lozano, Mª Teresa, Sánchez, Carlos, Izquierdo, David, Gil, Eduardo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:150011
Acceso en línea:http://zaguan.unizar.es/record/150011
Access Level:acceso abierto
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spelling Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric EnvironmentsPeláez-Coca, Mª DoloresHernando, AlbertoLozano, Mª TeresaSánchez, CarlosIzquierdo, DavidGil, EduardoThe main aim of this work is to identify alterations in the morphology of the pulse photoplethysmogram (PPG) signal, due to the exposure of the subjects to a hyperbaric environment. Additionally, their Pulse Rate Variability (PRV) is analysed to characterise the response of their Autonomic Nervous System (ANS). To do that, 28 volunteers are introduced into a hyperbaric chamber and five sequential stages with different atmospheric pressures (1 atm; descent to 3 and 5 atm; ascent to 3 and 1 atm) are performed. In this work, nineteen morphological parameters of the PPG signal are analysed: the amplitude of the PPG pulse; eight parameters related to pulse width; eight parameters related to pulse area; and the two slopes of the PPG pulse. Also, classical time and frequency parameters of PRV are computed. The relative change of all the parameters was calculated with respect to the initial baseline state at 1 atm. Notable widening of the pulses width is observed in the four stages analysed, together with a decrease in the PPG amplitude at the last ascent stages. The PPG area increases with pressure, with no significant changes when the initial pressure is recovered. These changes in PPG waveform may be caused by an increase in the systemic vascular resistance as a consequence of vasoconstriction. This phenomenon suggests a sympathetic activation, causing a vasoconstriction in the skin circulation, especially in the extremities. However, the PRV results show an augmented parasympathetic activity and a reduction in the parameters that characterise the sympathetic response. So, only a sympathetic activation is detected in the peripheral region, as reflected by PPG morphology. The information regarding the ANS and the cardiovascular response that can be extracted from the PPG signal, as well as its compatibility with wet conditions make this signal the most suitable for studying the physiological response in hyperbaric environments, including scuba diving activities.2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/150011reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/DGA-FSE/T39-20R-BSICoS groupinfo:eu-repo/grantAgreement/ES/DGA/T20-20Rinfo:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-095936-B-I00info:eu-repo/grantAgreement/ES/MINECO-FEDER/RTI2018-097723-B-I00info:eu-repo/grantAgreement/ES/UZ/UZCUD2019-TEC-01info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1500112026-05-29T13:59:51Z
dc.title.none.fl_str_mv Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
title Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
spellingShingle Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
Peláez-Coca, Mª Dolores
title_short Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
title_full Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
title_fullStr Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
title_full_unstemmed Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
title_sort Photoplethysmographic Waveform and Pulse Rate Variability Analysis in Hyperbaric Environments
dc.creator.none.fl_str_mv Peláez-Coca, Mª Dolores
Hernando, Alberto
Lozano, Mª Teresa
Sánchez, Carlos
Izquierdo, David
Gil, Eduardo
author Peláez-Coca, Mª Dolores
author_facet Peláez-Coca, Mª Dolores
Hernando, Alberto
Lozano, Mª Teresa
Sánchez, Carlos
Izquierdo, David
Gil, Eduardo
author_role author
author2 Hernando, Alberto
Lozano, Mª Teresa
Sánchez, Carlos
Izquierdo, David
Gil, Eduardo
author2_role author
author
author
author
author
description The main aim of this work is to identify alterations in the morphology of the pulse photoplethysmogram (PPG) signal, due to the exposure of the subjects to a hyperbaric environment. Additionally, their Pulse Rate Variability (PRV) is analysed to characterise the response of their Autonomic Nervous System (ANS). To do that, 28 volunteers are introduced into a hyperbaric chamber and five sequential stages with different atmospheric pressures (1 atm; descent to 3 and 5 atm; ascent to 3 and 1 atm) are performed. In this work, nineteen morphological parameters of the PPG signal are analysed: the amplitude of the PPG pulse; eight parameters related to pulse width; eight parameters related to pulse area; and the two slopes of the PPG pulse. Also, classical time and frequency parameters of PRV are computed. The relative change of all the parameters was calculated with respect to the initial baseline state at 1 atm. Notable widening of the pulses width is observed in the four stages analysed, together with a decrease in the PPG amplitude at the last ascent stages. The PPG area increases with pressure, with no significant changes when the initial pressure is recovered. These changes in PPG waveform may be caused by an increase in the systemic vascular resistance as a consequence of vasoconstriction. This phenomenon suggests a sympathetic activation, causing a vasoconstriction in the skin circulation, especially in the extremities. However, the PRV results show an augmented parasympathetic activity and a reduction in the parameters that characterise the sympathetic response. So, only a sympathetic activation is detected in the peripheral region, as reflected by PPG morphology. The information regarding the ANS and the cardiovascular response that can be extracted from the PPG signal, as well as its compatibility with wet conditions make this signal the most suitable for studying the physiological response in hyperbaric environments, including scuba diving activities.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/150011
url http://zaguan.unizar.es/record/150011
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/DGA-FSE/T39-20R-BSICoS group
info:eu-repo/grantAgreement/ES/DGA/T20-20R
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/UZCUD2019-TEC-01
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
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dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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