| Proposal on limits for chemical exposure in saturation divers' working atmosphere: the case of benzene. | |
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MedLine Citation:
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PMID: 22304480 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Saturation diving is performed under extreme environmental conditions. The divers are confined to a limited space for several weeks under high environmental pressure and elevated oxygen partial pressure. At present, divers are protected against chemical exposure by standard exposure limits only adjusted for the increased exposure length, i.e. from 8 to 24 hours a day and from 5 to 7 days a week. The objective of the present study was to indicate a procedure for derivation of occupational exposure limits for saturation diving, termed hyperbaric exposure limits (HEL). Using benzene as an example, a procedure is described that includes identification of the latest key documents, extensive literature search with defined exclusion criteria for the literature retrieved. Hematotoxicity and leukemia were defined as the critical effects, and exposure limits based upon concentration and cumulative exposure data and corresponding risks of leukemia were calculated. Possible interactions of high pressure, elevated pO(2), and continuous exposure have been assessed, and incorporated in a final suggestion of a HEL for benzene. The procedure should be applicable for other relevant chemicals in the divers' breathing atmosphere. It is emphasized that the lack of interactions from pressure and oxygen indicated for benzene may be completely different for other chemicals. |
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Authors:
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Rune Djurhuus; Vibeke Nossum; Steinar Ovrebø; Vidar Skaug |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-5 |
Journal Detail:
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Title: Critical reviews in toxicology Volume: - ISSN: 1547-6898 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-6 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8914275 Medline TA: Crit Rev Toxicol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Norwegian Underwater Intervention AS (NUI AS) , Bergen , Norway. |
Export Citation:
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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