Gas-content versus bubble decompression models.

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Title: Gas-content versus bubble decompression models.
Author: Doolette, DJ
Abstract: Decompression models predict the probability of decompression sickness from the characteristics of a dive. The first step in this procedure is to calculate an index of decompression stress from the depth/time/breathing-gas history. Gas-content models and bubble models are two major classes of decompression models that differ in this method of calculating decompression stress. Calculation of decompression stress typically involves simulating the amount of gas (in units of pressure) that dissolves in theoretical ‘tissue’ compartments during a dive. For gas-content models, the decompression stress is simply any positive value of supersaturation (tissue gas pressure – ambient pressure). For bubble models, the decompression stress is the simulated number or volume of bubbles formed as the result of any supersaturation. These two model classes result in a different shape of decompression, with bubble models typically beginning decompression stops deeper. There is as yet no scientific evidence supporting one format of decompression over the other. Gas-content models are the most widely used method of decompression calculation although bubble models have gained recent popularity with technical divers.
Description: Journal of the South Pacific Underwater Medicine Society
URI: http://archive.rubicon-foundation.org/9623
Date: 2005

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