Accession Number:

ADA070637

Title:

Work Capability and Physiological Effects in He-O2 Excursions to Pressures or 400-800-1200 and 1600 Feet of Sea Water. Predictive studies IV,

Descriptive Note:

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA INST FOR ENVIRONMENTAL MEDICINE

Report Date:

1978-01-01

Pagination or Media Count:

689.0

Abstract:

For the fourth in the series of Predictive Studies, experiments at the Institute for Environmental Medicine during the summer of 1975 exposed men in chambers, breathing helium with oxygen, to progressive increases of pressure equivalent to 400-800-1200-1600 feet of sea water fsw. Rates of compression were selected to purposely induce physiological derangements associated with both initial exposure to compression and exposure to stable high pressure. Goals included a determination of the specific character and time course of onset of physiological and performance decrements during the intentionally rapid compressions, and determination of rates of adaptation on reaching stable elevated pressure b investigation of accelerated methods for decompression in deep saturation-excursion diving and c determination of competence in practical work performed in water at pressures equivalent to the extreme diving depths of 1200 and 1600 fsw. Predictive Studies IV has indicated the time course of onset and adaptation to effects of rapid compression and has shown the existence of a capacity for more efficient decompression in excursions during deep saturation than in shallow excursions from sea level. It has demonstrated the ability of men to perform useful scientific, physical and technical work at the high pressures of deep undersea exposures.

Subject Categories:

  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE