[abstract] NO-STOP REPETITIVE N2/02 DIVING WITH SURFACE INTERVAL 02 (SI02): CALCULATION OF SCHEDULES.

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[abstract] NO-STOP REPETITIVE N2/02 DIVING WITH SURFACE INTERVAL 02 (SI02): CALCULATION OF SCHEDULES.

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dc.contributor.author Gerth, WA en_US
dc.contributor.author Vann, RD en_US
dc.contributor.author Southerland, DG en_US
dc.date.accessioned 2006-09-20T03:52:42Z
dc.date.available 2006-09-20T03:52:42Z
dc.date.issued 1992 en_US
dc.identifier.other Undersea Hyp Med 1992:. en_US
dc.identifier.uri http://archive.rubicon-foundation.org/3616
dc.description Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held June 22-27, 1992. HYATT REGENCY BETHESDA, BETHESDA, MARYLAND USA (http:www.uhms.org) en_US
dc.description.abstract The risk of decompression sickness (DCS) in repetitive diving inevitably limits the safely allowable depths and bottom times, or requires prolongation of surface intervals between dives. Longer bottom times and shorter surface intervals are theoretically afforded by breathing oxygen-enriched air, or nitrox, at depth and 100 percent oxygen at surface. The former reduces N2 uptake at pressure while the latter accelerates N2 elimination between dives. Repetitive dive schedules for chamber and field trials of these concepts were computed through a modeling effort based on maximum likelihood. The model was founded on the assumption that DCS is caused by tissular gas bubble formation that is governed in turn by the kinetics of gas exchange between blood and tissue and between tissue and bubbles. Diver susceptibility to the bubbles and the corresponding probability of DCS was postulated to increase with bubble volume according to a log-normal statistical distribution. Maximum likelihood techniques were used to optimize model parameter values about actual DCS incidence data for a wide variety of dive profiles. The parameterized model was then used to estimate the bottom time maxima in repetitive dive profiles with nitrox breathing at depth and 100 percent oxygen breathing during surface intervals of specific duration. Resultant schedules, tests of which are presented in separate reports, incorporate substantially longer bottom times and more frequent repetitive dives, with no increases in attendant risks of DCS, than those allowable with air breathing alone. Supported by NOAA/NURP at UNC-W, NA88AA-D-UR004. en_US
dc.language.iso en_US
dc.rights Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held June 22-27, 1992. HYATT REGENCY BETHESDA, BETHESDA, MARYLAND USA (http:www.uhms.org) en_US
dc.subject DCS en_US
dc.subject oxygen en_US
dc.subject decompression sickness en_US
dc.subject human en_US
dc.subject surface interval en_US
dc.title [abstract] NO-STOP REPETITIVE N2/02 DIVING WITH SURFACE INTERVAL 02 (SI02): CALCULATION OF SCHEDULES. en_US

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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