[abstract] OBSERVATIONS FOLLOWING LOSS OF CONSCIOUSNESS UNDER WATER.

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[abstract] OBSERVATIONS FOLLOWING LOSS OF CONSCIOUSNESS UNDER WATER.

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Title: [abstract] OBSERVATIONS FOLLOWING LOSS OF CONSCIOUSNESS UNDER WATER.
Author: Morrison, JB; Florio, JT; Butt, WS
Abstract: Physiological observations were made following two separate diving accidents in which an experienced professional diver (A) lost consciousness during an air dive to 69 meters and an amateur sports diver (D) lost consciousness during a 40 meter air dive. Ventilatory responses to inspired carbon dioxide of both divers were determined and their responses to exercise under simulated diving conditions were measured. Both divers A and D had a low response to inspired C02 (1.65 and 0.83 1iters min. -1VE/ mmHg PACO2 respectively measured at a PAO2 of 110mmHg), and although comfortable during testing, diver D experienced severe headache and nausea for several hours after completion. In comparison to a group of non-divers (n=10) the responses of divers A and D were below the estimated 5th percentile for that population. In comparison to a group of experienced professional divers (n=10) the responses of divers A and D were well below average, but above the 5th percentile. Both divers A and D exhibited marked carbon dioxide retention during moderate exercise at 30 meters (end tidal PCO2 = 65 and 57mmHg respectively). At 70 meters diver (A) stopped work in less than 3 minutes due to severe dizziness accompanied by rapid shallow breathing. From experimental results a reduced sensitivity to carbon dioxide is suspected of being partly responsible for the incidents described possibly due to interaction of hypercapnia and nitrogen narcosis.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held May 13-16, 1977. Holiday-Inn, Toronto, Ontario, Canada (http:www.uhms.org)
URI: http://archive.rubicon-foundation.org/4180
Date: 1977

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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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