[abstract] NO-STOP REPETITIVE N2/02 DIVING WITH SURFACE INTERVAL 02 (SI02): PHASE I.

Rubicon Research Repository/Manakin Repository

[abstract] NO-STOP REPETITIVE N2/02 DIVING WITH SURFACE INTERVAL 02 (SI02): PHASE I.

Show full item record


Title: [abstract] NO-STOP REPETITIVE N2/02 DIVING WITH SURFACE INTERVAL 02 (SI02): PHASE I.
Author: Vann, RD; Fawcett, TA; Currie, MS; Fife, CE; Zhanu, J; Piantadosi, CA
Abstract: 02 breathing during no-stop dive surface intervals (SI) eliminates absorbed N2 and might increase repetitive dive time. Phase I tested this concept in chamber trials of 4 N2/02 dive profiles with dry, resting divers. Profiles had 3 no-stop dives to 70 fsw (36 percent 02) or 120 fsw (32 percent 02) with 30 or 120 min SI's. Profiles and results were: Dl Tl A/02/A N D2 T2 A/02/A N D3 T3 A/02/A N A 70 55 0/30/0 25 70 40 0/30/0 22 70 30 0/30/- 22 B 120 25 0/30/0 25 120 15 0/30/0 22 120 15 0/30/- 22 C 70 55 90/30/0 25 70 45 90/30/0 22 70 45 90/30/- 22 D 120 25 90/30/0 28 120 20 90/30/0 23 120 20 90/30/- 23 -120 25 30-DCS A/02/A-Air and 02 times, min; N-Trials Total bottom times were 34-120 percent longer than equivalent NOAA nitrox dives and 65-267 percent longer than USN air dives. Subjects dove once per profile. One knee pain incident occurred after the first 120 fsw (98 fsw EAD) dive of Profile D before SI02. 7 percent of the subjects had Doppler detectable VGE (Spencer protocol). There were no signs or symptoms of CNS 02 toxicity and no vital capacity changes. Quidel immunoassays of complement components C5-C9 in blood samples drawn pre-dive, within 30 min of each dive, and 2 hr after the last dive showed no statistically significant changes. The subject with DCS had acutely elevated assays. Supported by NOAAINURP at UNC-W, NA88AA-D-UR004.
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)
URI: http://archive.rubicon-foundation.org/3617
Date: 1992

Files in this item

Files Size Format View
SIO2_Phase1.pdf 10.79Mb PDF View/Open

This item appears in the following Collection(s)

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

Show full item record

Browse

My Account