[Effectiveness of a helium-oxygen gas mixture in transverse accelerations].
Healthy male test subjects, aged 20 to 45, were exposed to acceleration of +6 Gx for 1200 sec and of +10 Gx for 60 sec. Three gradients of the centrifuge acceleration were used in the latter case. In every experimental run the test subjects were exposed to accelerations while breathing air or a helium-oxygen atmosphere. The positive effect of the helium-oxygen atmosphere was seen in an increase of the respiration intensity and in an elevation of pulmonary ventilation and gas exchange. This may be associated with a decline of the aerodynamic resistance to breathing. The positive effect of the helium-oxygen atmosphere was more pronounced during accelerations of +4 to 8 Gx and depended on the total exposure time.
D000054:Acceleration; D000328:Adult; D006371:Helium; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen; D012119:Respiration
D006371:Helium; D010100:Oxygen
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