[abstract] AB INITIO SIMULATION OF INERT GAS TRANSPORT IN THE HUMAN.

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[abstract] AB INITIO SIMULATION OF INERT GAS TRANSPORT IN THE HUMAN.

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Title: [abstract] AB INITIO SIMULATION OF INERT GAS TRANSPORT IN THE HUMAN.
Author: Liou, M-C; Wissler, EH
Abstract: A previously developed human thermal model has been extended to describe intracorporeal inert gas transport under various conditions of exercise and thermal stress. This model attempts to simulate underlying physiological and physical phenomenon in considerable detail. The geometry and composition of the body are defined in terms of 15 cylindrical elements which represent the head, upper and lower trunk, and proximal, medial and distal segments of each extremity. Each major element is further divided into cylindrical shells for which appropriate properties are assigned to represent various kinds of tissue, such as bone, muscle, fat and viscera. For the purposes of this study, the most important properties are the local metabolic rate, solubilities of N2 and He, and the perfusion rate. Inert gas transport by perfusion and diffusion are both considered, together with bubble formation in both tissue and blood. The "oxygen window" concept occurs naturally whenever bubbles are present. Adjustable parameters were chosen to obtain a good representation of experimental data from three sources: Behnke and Willmon (1941), Kindwall, et al. (1975) and Dick, et ale (1983). Bubble formation must be included in the model if it is to describe inert gas exchange for both isobaric changes in breathing gas composition and changes in pressure. When no-stop bounce dives were simulated with various bottom times, it was found that several variables (maximum volume of separated gas, for instance) were fairly uniform across the range of conditions, but it is still not clear how criteria for the onset of decompression sickness should be defined. Decompression from saturation will also be analyzed and discussed at the meeting.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held May 29-June 2, 1984. The Gunter Hotel, San Antonio, Texas (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/5328
Date: 1984

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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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