Decompression theory | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-28

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Decompression_theory


00:02:14 1 Physiology of decompression
00:06:22 1.1 Dissolved phase gas dynamics
00:13:52 1.2 Bubble mechanics
00:22:15 1.3 Isobaric counterdiffusion (ICD)
00:25:45 2 Decompression sickness
00:34:04 3 Decompression model concepts
00:37:01 3.1 Range of application
00:40:06 3.2 Tissue compartments
00:43:06 3.3 Ingassing model
00:44:35 3.4 Outgassing models
00:46:34 3.4.1 The critical supersaturation approach
00:50:27 3.4.2 The no-supersaturation approach
00:52:11 3.4.3 The critical volume approach
00:53:56 3.5 Residual inert gas
00:55:33 4 Decompression models in practice
00:55:44 4.1 Deterministic models
00:58:12 4.1.1 Perfusion limited tissues and parallel tissue models
01:10:04 4.1.2 Diffusion limited tissues and the "Tissue slab", and series models
01:11:16 4.1.3 Bubble models
01:13:14 4.2 Probabilistic models
01:14:07 4.2.1 Goldman Interconnected Compartment Model
01:17:35 4.3 Saturation decompression
01:21:53 4.4 Validation of models
01:23:40 5 Current research
01:26:40 6 Teaching of decompression theory and tables
01:28:50 7 See also
01:29:44 8 Notes



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SUMMARY
=======
Decompression theory is the study and modelling of the transfer of the inert gas component of breathing gases from the gas in the lungs to the tissues and back during exposure to variations in ambient pressure. In the case of underwater diving and compressed air work, this mostly involves ambient pressures greater than the local surface pressure, but astronauts, high altitude mountaineers, and travellers in aircraft which are not pressurised to sea level pressure, are generally exposed to ambient pressures less than standard sea level atmospheric pressure. In all cases, the symptoms caused by decompression occur during or within a relatively short period of hours, or occasionally days, after a significant pressure reduction.The term "decompression" derives from the reduction in ambient pressure experienced by the organism and refers to both the reduction in pressure and the process of allowing dissolved inert gases to be eliminated from the tissues during and after this reduction in pressure. The uptake of gas by the tissues is in the dissolved state, and elimination also requires the gas to be dissolved, however a sufficient reduction in ambient pressure may cause bubble formation in the tissues, which can lead to tissue damage and the symptoms known as decompression sickness, and also delays the elimination of the gas.Decompression modeling attempts to explain and predict the mechanism of gas elimination and bubble formation within the organism during and after changes in ambient pressure, and provides mathematical models which attempt to predict acceptably low risk and reasonably practicable procedures for decompression in the field.
Both deterministic and probabilistic models have been used, and are still in use.