EFFECTS OF DECOMPRESSION ON THIRTY-FIVE SUBJECTS REPEATEDLY EXPOSED TO A SIMULATED ALTITUDE OF 20,000 FEET DURING APPROXIMATELY ONE MONTH

Abstract

When healthy young subjects breathing supplementary oxygen were exposed to a pressure altitude of 20,000 feet for 30 minutes both morning and afternoon over a period of a month it was found that: (a) with rare exceptions there were no severe symptoms of decompression; (b) symptoms requiring recompression of the subject may occur if additional etiologic factors are present; (c) the most important symptom was fatigue but the exact role of decompression in its causation still remains to be evaluated; (d) the repeated exposures did not lead to an increase in severity of symptoms; (c) if the incidence of symptoms is allowed as a measure of susceptibility our data suggests that, after a temporary increase in susceptibility, there is a sharp fall to well below the initial level suggesting that adaptation to mild decompression occurs.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1947
Accession Number
AD0622163

Entities

People

  • Ashton Graybiel
  • H. A. Smedal

Tags

DTIC Thesaurus Topics

  • Altitude
  • Blood Groups
  • Chambers
  • Decompression
  • Decompression Chambers
  • Decompression Sickness
  • Health Services
  • Joints (Anatomy)
  • Low Altitude
  • Low Temperature
  • Medical Examination
  • Motivation
  • Observers
  • Physical Fitness
  • Shoes
  • Specific Gravity
  • Standards

Readers

  • Cardiovascular Physiology
  • Circadian Sleep-Wake Regulation and Chronobiology
  • Underwater engineering and Marine Technology.