| CNS toxicity in closed-circuit oxygen diving: symptoms reported from 2527 dives. | |
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MedLine Citation:
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PMID: 16708533 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: Oxygen toxicity is a problem in diving and can have fatal consequences in the water. Various aspects of oxygen diving have been studied in dry hyperbaric chambers, but there is a lack of information on in-water diving using closed-circuit oxygen apparatus. METHOD: We collected 2527 dive reports from 473 closed-circuit oxygen divers (a mean of 5.2 reports per diver), and analyzed the relationships between various symptoms and their dependence on depth and diving time. RESULTS: No CNS oxygen toxicity-related symptoms were reported at a depth of 2 m seawater (msw), but their proportion increased at depths from 3 to 6 msw. We found that CNS oxygen toxicity-related symptoms appeared in 2.5% of dives conducted at a Po2 of 119 kPa. The main symptoms and signs reported were headache: 4.5%; nausea: 2.6%; hyperventilation: 2.6%; heavy breathing: 2.4%; dizziness: 1.6%; hiccups: 1.5%; bloody sputum: 1.4%; cold shivering: 1.1%; tinnitus: 0.9%; difficulty maintaining a steady depth: 0.9%; disorientation: 0.6%; tiredness: 0.5%; tingling in the limbs: 0.4%; hearing disturbances: 0.4%; a choking sensation: 0.4%; extreme effort: 0.4%; and loss of consciousness: 0.3%. DISCUSSION: Environmental factors, light vs. dark and temperature, had no effect on symptoms. The number of symptoms increased with diving time. Divers who experienced amnesia, facial twitching, hearing disturbances (p < 0.001), and disorientation (p < 0.014) were prone to suffer loss of consciousness. It was found that some divers are more sensitive to oxygen than others (p < 0.0001). |
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Authors:
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Ran Arieli; Tzippora Shochat; Yochai Adir |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Aviation, space, and environmental medicine Volume: 77 ISSN: 0095-6562 ISO Abbreviation: Aviat Space Environ Med Publication Date: 2006 May |
Date Detail:
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Created Date: 2006-05-19 Completed Date: 2006-10-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7501714 Medline TA: Aviat Space Environ Med Country: United States |
Other Details:
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Languages: eng Pagination: 526-32 Citation Subset: IM; S |
Affiliation:
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Israel Naval Medical Institute, IDF Medical Corps, Haifa, Israel. rarieli@netvision.net.il |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Airway Obstruction
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etiology Confusion / etiology Diving* Dizziness / etiology Fatigue / etiology Headache / etiology Hearing Disorders / etiology Hemoptysis / etiology Hiccup / etiology Humans Hyperventilation / etiology Military Personnel Nausea / etiology Oxygen / adverse effects* Paresthesia / etiology Shivering Time Factors Tinnitus / etiology Unconsciousness / etiology Work of Breathing |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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