[abstract] CHISAT 1: A COLLABORATIVE CHINESE-AMERICAN PROJECT IN NITROX SATURATION - EXCURSION DIVING.

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[abstract] CHISAT 1: A COLLABORATIVE CHINESE-AMERICAN PROJECT IN NITROX SATURATION - EXCURSION DIVING.

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Title: [abstract] CHISAT 1: A COLLABORATIVE CHINESE-AMERICAN PROJECT IN NITROX SATURATION - EXCURSION DIVING.
Author: Hamilton Jr, RW; Shi, ZY; Schane, W; Chen, BS; Lee, YC; Fan, ZH; Gu, ZZ; Zhang, LB
Abstract: A collaborative experiment between the Chinese Underwater Technology Institute, NOAA's Office of Undersea Research, and Hamilton Research was conducted at CUTI's facility in Shanghai during October 1988. A primary experimental objective was to extend the laboratory validation of NOAA's new Repex procedures for habitat diving (NOAA Undersea Research Program 88-1A and 88-1B) by testing the Repex decompression algorithm for multiday repetitive excursions computed on a worst case "custom" basis. We also further evaluated the longer, deeper repetitive excursions (some with stops), oxygen exposure management, and saturation decompression after excursions, all from the Repex procedures. Four experienced divers were saturated in a dry chamber at 25 msw pressure for 5 days, during which time they did 15 air excursions to depths between 50 and 75 msw, for times up to 240 min. Decompressions from excursions were mostly no-stop, but 5 required stops of durations from 3 to 116 min. Saturation decompression began with the "precursory" ascent following a brief return to 25 msw. Doppler bubble detection showed some bubbles following excursions, Spencer Grade II and occasionally III, and during saturation decompression, especially after muscle flexing; bubbles were present for many hours after the end of saturation decompression. No symptoms of decompression sickness were reported. Oxygen exposure reached its peak at 6 days at 3100 oxygen toxicity units, over 600 more than the Repex limit; the symptoms were mild and transient numb fingertips; this adds support that the limit is about right. No vital capacity changes were seen. While these experimental findings are important, perhaps more significant is the initiation of effective scientific cooperation between scientists of these two countries in this special field.
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/6748
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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