Accession Number : ADA230172


Title :   Effect of Inert Gas Switching at Depth on Decompression Outcome in Rats


Corporate Author : NAVAL MEDICAL RESEARCH INST BETHESDA MD


Personal Author(s) : Lillo, R S ; MacCallum, M E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a230172.pdf


Report Date : Jan 1989


Pagination or Media Count : 11


Abstract : THE ROLE that different inert gases have in causing decompression sickness (DCS) has been studied in length in both animals and humans. These investigations have demonstrated significant differences in inert gas uptake and elimination rates and potency for producing DCS. Because of these differences, the potential appears to exist for using inert gas sequencing to reduce the decompression requirement during operational diving. However, it is also believed that the decompression load (i.e., the inert gas that must be eliminated during decompression) could be increased under other gas-sequencing procedures if one gas is taken up by tissues faster than another gas is washed out. Under these circumstances, a transient increase in total inert gas pressure could occur under isobaric conditions via the phenomenon of counterdiffusion. In fact, there is some evidence that bubbles can form under such situations. Thus it appears important to determine which gas switches might be advantageous and which might be disadvantageous from a decompression safety point of view. (JS)


Descriptors :   *REQUIREMENTS , HUMANS , RATES , GASES , BUBBLES , PRESSURE , SAFETY , ANIMALS , INERT MATERIALS , SWITCHING , ELIMINATION , DIVING , SWITCHES , DECOMPRESSION SICKNESS , DECOMPRESSION , ISOBARS(PRESSURE) , RATS


Subject Categories : Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE