There are several mechanisms by which contact of cryogenic fluids with a person can present a physiological hazard. The most obvious of these mechanisms is that the low temperature can cause freezing of living tissue. Also, in the case of cryogens other than oxygen, the large expansion that occurs upon evaporation and warming to ambient temperature can result in dilution of the oxygen in the surrounding atmosphere to the point where it cannot support life. In the case of a few cryogens, toxicity can also be a problem, but, fortunately, these are not frequently encountered.
KeywordsBody Core Temperature Threshold Limit Value Cold Damage Governmental Industrial Hygienist Cryogenic Fluid
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