126504 20241125101132.0 doi 10.3390/s23115289 sideral 133993 ART-2023-133993 eng Sánchez, Carlos Universidad de Zaragoza (orcid)0000-0003-4273-5403 Enhancing safety in hyperbaric environments through analysis of autonomic nervous system responses: a comparison of dry and humid conditions 2023 Access copy available to the general public Unrestricted Diving can have significant cardiovascular effects on the human body and increase the risk of developing cardiac health issues. This study aimed to investigate the autonomic nervous system (ANS) responses of healthy individuals during simulated dives in hyperbaric chambers and explore the effects of the humid environment on these responses. Electrocardiographic- and heart-rate-variability (HRV)-derived indices were analyzed, and their statistical ranges were compared at different depths during simulated immersions under dry and humid conditions. The results showed that humidity significantly affected the ANS responses of the subjects, leading to reduced parasympathetic activity and increased sympathetic dominance. The power of the high-frequency band of the HRV after removing the influence of respiration, PHF⊥¯, and the number of pairs of successive normal-to-normal intervals that differ by more than 50 ms divided by the total number of normal-to-normal intervals, pNN50¯, indices were found to be the most informative in distinguishing the ANS responses of subjects between the two datasets. Additionally, the statistical ranges of the HRV indices were calculated, and the classification of subjects as “normal” or “abnormal” was determined based on these ranges. The results showed that the ranges were effective at identifying abnormal ANS responses, indicating the potential use of these ranges as a reference for monitoring the activity of divers and avoiding future immersions if many indices are out of the normal ranges. The bagging method was also used to include some variability in the datasets’ ranges, and the classification results showed that the ranges computed without proper bagging represent reality and its associated variability. Overall, this study provides valuable insights into the ANS responses of healthy individuals during simulated dives in hyperbaric chambers and the effects of humidity on these responses. info:eu-repo/grantAgreement/ES/DGA-FSE/T39-20R-BSICoS group info:eu-repo/grantAgreement/ES/DGA/LMP141-21 info:eu-repo/grantAgreement/ES/DGA/LMP94_21 info:eu-repo/grantAgreement/ES/DGA/T20-20R info:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-095936-B-I00 info:eu-repo/grantAgreement/ES/UZ/CUD2019-10 info:eu-repo/grantAgreement/ES/UZ/CUD2020-11 info:eu-repo/grantAgreement/ES/UZ/CUD2021-03 info:eu-repo/grantAgreement/ES/UZ/UZCUD2019-TEC-01 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.4 2023 CHEMISTRY, ANALYTICAL 34 / 106 = 0.321 2023 Q2 T1 INSTRUMENTS & INSTRUMENTATION 24 / 76 = 0.316 2023 Q2 T1 ENGINEERING, ELECTRICAL & ELECTRONIC 122 / 353 = 0.346 2023 Q2 T2 0.786 2023 Instrumentation 2023 Q1 Analytical Chemistry 2023 Q1 Atomic and Molecular Physics, and Optics 2023 Q1 Information Systems 2023 Q2 Medicine (miscellaneous) 2023 Q2 Biochemistry 2023 Q2 Electrical and Electronic Engineering 2023 Q2 7.3 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hernando, Alberto (orcid)0000-0003-2596-7237 Bolea, Juan (orcid)0000-0003-4068-127X Izquierdo, David Universidad de Zaragoza (orcid)0000-0002-4746-3139 Rodríguez, Germán Olea, Agustín Lozano, María Teresa (orcid)0000-0003-0630-4366 Peláez-Coca, María Dolores (orcid)0000-0002-0690-3193 2002 385 Universidad de Zaragoza Dpto. Física Aplicada Área Física Aplicada 5007 520 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Ingen.Sistemas y Automát. 23, 11 (2023), 5289 [13 pp.] Sensors Sensors 1424-8220 2263064 http://zaguan.unizar.es/record/126504/files/texto_completo.pdf Versión publicada 2744699 http://zaguan.unizar.es/record/126504/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126504 articulos driver 2024-11-22-11:59:19 ARTICLE