[abstract]OXYGEN-DRIVEN DECOMPRESSION AFTER AIR, NITROX, HELIOX AND TRIMIX SATURATION EXPOSURES

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[abstract]OXYGEN-DRIVEN DECOMPRESSION AFTER AIR, NITROX, HELIOX AND TRIMIX SATURATION EXPOSURES

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dc.contributor.author Doboszynski, T en_US
dc.contributor.author Sicko, Z en_US
dc.contributor.author Kot, J en_US
dc.date.accessioned 2015-06-11T04:30:08Z
dc.date.available 2015-06-11T04:30:08Z
dc.date.issued 2012 en_US
dc.identifier.citation Undersea and Hyperbaric Medical Society Annual Meeting, Phoenix, Arizona, USA. Undersea Hyperb Med. 2012 Sep-Oct;39(5) en_US
dc.identifier.isbn 1066-2936 en_US
dc.identifier.uri http://archive.rubicon-foundation.org/10448
dc.description Undersea and Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc. en_US
dc.description.abstract Introduction: Saturation exposures define border values of parameters describing inert gas de-saturation from human body. There are several operational saturation systems which allow safe decompression of divers, but there is still lack of physiological model which would explain parameters used for calculations using reliable physiological assumptions. In Poland, the system for saturation decompressions has been developed on the basis of the concept of the “extended oxygen window.” According to this model, the first phase of decompression is relatively fast and enhances elimination of inert gas(es) from fast tissues. Then, decompression is slowed down to stabilize gas out flow from the slowest tissue described by the longest tissue half-time (THmax, 180 minutes for helium, 360 minutes for nitrogen, and variable half-time for trimix as depending on content). Material and methods: In the verification phase of the research grant approved by the Ethics Committee, there were 127 man-expositions with young healthy volunteers conducted using air, nitrox, heliox and trimix up to pressures of 11 ATA in the saturation habitat. After at least 48 hours at saturation plateau, pressure was reduced within 1.5 hours by the value of the extended oxygen window (related to inspired oxygen partial pressure). Then decompression was conducted with a rate proportional to inspired oxygen according to the equation: DecoRate = PiO2 x (ln(2) / THmax). Results: There was no symptom of DCS in any decompression conducted according to the presented model (binomial 95 percent CI is from 0.00 to 0.02). Conclusions: Oxygen plays a dominant role in the process of desaturation of inert gas(es) from human body after hyperbaric exposures. It allows fast initial phase of saturation decompression and then controls the rate of further decompression limited by the half-time of inert gas elimination from the slowest compartment. (Supported by the State Committee of Scientific Research Grant 4PO5B09208.) en_US
dc.language.iso en en_US
dc.publisher Undersea and Hyperbaric Medical Society, Inc. en_US
dc.subject Saturation en_US
dc.subject decompression en_US
dc.subject oxygen window en_US
dc.subject air en_US
dc.subject nitrox en_US
dc.subject heliox en_US
dc.subject trimix en_US
dc.subject inert gas elimination en_US
dc.subject decompression model en_US
dc.subject human en_US
dc.title [abstract]OXYGEN-DRIVEN DECOMPRESSION AFTER AIR, NITROX, HELIOX AND TRIMIX SATURATION EXPOSURES en_US
dc.type Article en_US

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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