[abstract] ESTIMATlNG RISK IN MULTI-LEVEL SPORT DIVING.

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[abstract] ESTIMATlNG RISK IN MULTI-LEVEL SPORT DIVING.

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Title: [abstract] ESTIMATlNG RISK IN MULTI-LEVEL SPORT DIVING.
Author: Wachholz, CJ; Bensen, CV; Vann, RD
Abstract: Sport divers often dive a multi-level profile in the course of normal dive excursions. Although the U.S. Navy standard Air Decompression Tables assume "square" profiles, new dive computers and tables allow for multi-level dive planning. During a recent DAN benefit trip, Sunnto decompression meters with a retrievable 20 hour memory were used to monitor the profiles of 54 dives. No attempt was made to regulate the dive profiles am nearly all dives were observed to be multi-level. Doppler was used to measure precordial bubbles following each dive. Although many of the dives recorded exceeded the no-decompression depth/time limits, no divers reported DCS symptoms and bubbles were heard in only one diver. The potential DCS risk was estimated for each dive using a 3-tissue bubble/ diffusion barrier model with parameter values detemined using maximum likelihood (Vann, UHP 9:165-182, 1987) from the decompression trials for the U.S. Navy Standard Air trials (Des Granges, NEDU Report, 5-57). These risks are shown below (mean risk: 4.7/10K dives, range: 0 - 7.2/1K). Repetitive dive profiles of a similar nature can have risks 10 - 100 times higher. (NOTE: Graph in abstract)
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held 6-11 June 1989. Hawaiian Regent Hotel, Honolulu, Hawaii, USA (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/6608
Date: 1989

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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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