Comparison of lung function values of trained divers in 1.5 ATA hyperbaric chamber after inhaling 100% oxygen and regular air: a crossover study

• Published in: Advances in respiratory medicine 2017-01, Vol.85 (5), p.233-238
• Main Authors: Ilmi, Muhammad Irfan, Yunus, Faisal, Guritno, Muhammad, Damayanti, Triya, Samoedro, Erlang, Nazaruddin, Ahmad Muslim, Nurwidya, Fariz
• Format: Article
• Language: English
• Subjects: Adult; Atmosphere Exposure Chambers; Cross-Over Studies; Diving - physiology; Humans; Hyperbaric Oxygenation - methods; Male; Oxygen - pharmacology; Oxygen Consumption - physiology; Respiration - drug effects; Respiratory Function Tests; Respiratory Physiological Phenomena
• ISSN: 2543-6031; 2451-4934; 2543-6031
• DOI: 10.5603/ARM.a2017.0038

Diving is an activity performed in more than 1 atmosphere absolute pressure (ATA) either underwater or in a hyperbaric chamber. We aimed to compare lung function values of trained divers in 1.5 ATA hyperbaric chambers after inhaling 100% oxygen and regular air. This experimental study with crossover design involved 18 trained divers in 1.5 ATA hyperbaric room, which is equivalents to a 5-meter depth. The eighteen subjects as the supplementation group, using oro-nasal mask, inhaled 100% oxygen for 30 minutes followed by a one-day washout period. The subjects were then crossed-over into control group inhaling only regular air for 30 minutes. Lung function test was performed before and after supplementation. In eighteen subjects inhaling regular air, there was a significant difference (p < 0.05) in FEV₁/FVC, PEF, FEF25, FEF50, and FEF75. Whereas in eighteen subjects inhaling 100% oxygen, significant difference (p < 0.05) was observed not only in FEV₁/FVC, PEF, FEF25, FEF50 and FEF75, but also in FEV₁. There were significant differences in lung function, especially in dynamic volume of trained divers in 1.5 ATA hyperbaric chamber after inhaling 100% oxygen and regular air for 30 minutes; while there were no significant differences in lung capacity (VC and FVC) in the both groups. Lung function returned to normal following supplementation with a 1-day washout period.