Human physiology under high pressure: I. Effects of Nitrogen, Carbon Dioxide, and Cold.

摘要: We confirm the finding of Behnke, et al. (1935) that air at 8·6 atm. pressure has a somewhat intoxicating effect on human beings, and this is due to nitrogen. The nitrogen reaches its maximum after about 3 min. There was no reduction manual dexterity in test used by us, but considerable performance arithmetic, most practical activities. At 10 these effects were enhanced, lowered some cases. When helium or hydrogen substituted for there intoxication.3–4% carbon dioxide atmospheric caused deterioration arithmetical skill, two subjects tested, 6% deterioration.When containing 0·4% dioxide, therefore with partial 4%, breathed atm., marked dexterity, good deal confusion. breathing pressures 6·6–9·7% 10. eight lost consciousness 1–5 min., could tolerate over 8% 5 more. With half an hour's exposure 6–7% one subject 7 pressure, another nearly did so.We consider percentage should be kept below 0·3%. Exposure high does not increase liability ‘bends’ other symptoms rapid decompression.Immersion water 40° F. enhance high-pressure air, enhanced those together.In certain apparatus resistance became so great as intolerable.Few experienced serious trouble during compression, decompression. But developed unilateral pneumothorax.