ArticleEuropean journal of applied physiology2023
Arterial blood gases' analysis in elite breath-hold divers at extreme depths.
Article in European journal of applied physiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Cumulative oxidative and inflammatory responses to repeated depth training in breath-hold divers: a multiparametric field study.European journal of applied physiology · 2026Article
- Advances in breath-hold diving research: a state-of-the-art review.European journal of applied physiology · 2026Review
- Oxy-Inflammation in Humans during Underwater Activities.International journal of molecular sciences · 2024Review
- Unlocking the depths: multiple factors contribute to risk for hypoxic blackout during deep freediving.European journal of applied physiology · 2023Article
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Authors and funding
7 authors.
Funding
Abstract
purposeTo showcase results of arterial blood gases' analysis in elite breath-hold divers sampled at depths where their total lung capacities are below their residual lung volume on surface.
methodsThree male elite breath-hold divers performed body plethysmographies to determine their lung volumes. Two dives were performed, one on normal inhalation to 60 m of depth and the second on complete exhalation to 10 m of depth. Blood samples were taken on five occasions; before the first dive, at 60 and 10 m of depth and immediately after resurfacing after both dives.
resultsArterial blood gases' analysis at 60 m of depth showed an increase in partial pressures of oxygen and carbon dioxide, a consequent decrease in pH and an increase in concentration of HCO
conclusionThis is the first study performed at depths where the total lung capacities of participants are below their residual lung volumes at the surface. Partial pressure of carbon dioxide increases at depth to higher than normal values causing pH to decrease thus exceeding the buffering potential of the blood. In addition, previous assumptions that maximum depth in breath-hold divers is where total lung capacity is reduced to their residual volume proved wrong as our group of divers had no symptoms after resurfacing.
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