Haldane's decompression model: Difference between revisions

Revision as of 04:46, 4 June 2024

Revision as of 04:51, 4 June 2024

Line 16:

'''Haldane's decompression model''' is a [[mathematical model]] for [[Decompression (diving)|decompression]] to sea level atmospheric pressure of divers breathing compressed air at ambient pressure that was proposed in 1908 by the Scottish physiologist, [[John Scott Haldane]] (2 May 1860 – 14/15 March 1936),<ref>[http://navxdivingu.blogspot.ae/2009/10/diving-history-john-scott-haldane.html "The United States Navy Experimental Diving Unit"]</ref> who was also famous for intrepid self-experimentation.

Haldane prepared the first recognized [[Decompression theory#John Scott Haldane|decompression table]] for the [[British Admiralty]] in 1908 based on extensive experiments on goats and other animals using a [[clinical endpoint]] of [[symptom]]atic [[decompression sickness]].<ref name="haldane" /><ref name=":0">{{Cite journal |last=von Lünen |first=Alexander |date=2006 |title=Goats and gases: "The Prevention of Compressed Air Illness" by Haldane et al--A commentary |url=https://pubmed.ncbi.nlm.nih.gov/17078317 |journal=Wilderness & Environmental Medicine |volume=17 |issue=3 |pages=195–196 |doi=10.1580/06-weme-lh-028 |issn=1080-6032 |pmid=17078317}}</ref> The model, commented as "a lasting contribution to the diving world", was published in the ''[[Journal of Hygiene]]''.

<ref>{{Cite book |last=Lang |first=Michael A. |url=https://semspub.epa.gov/work/10/100006143.pdf |title=Diving for Science 2009: Proceedings of the American Academy of Underwater Sciences 28th Symposium |last2=Brubakk |first2=Alf O. |date=2009 |publisher=American Academy of Underwater Sciences |editor-last=Pollock |editor-first=N.W. |pages=112–124 |language=en |chapter=The Haldane Effect |chapter-url=https://www.tecvault.t101.ro/Haldane%20effect.pdf}}</ref>

Line 63:

Haldane ran his experiments on some animals, illustrating the difference between different kinds of animals such as goats, guinea-pigs, mice, rats, hens and rabbits, but his main work and results were done on goats and men.

Haldane stated in his bookpaper: "In order to avoid the risk of bubbles being formed on decompression, it has hitherto been recommended that decompression should be slow and at as nearly a uniform rate throughout as possible. We must therefore carefully consider the process of desaturation of the body during slow and uniform decompression",{{Citation<ref needed|datename=May"haldane" 2015}}/> hence the outline of his work is noted:<ref name=":0" />

* When humans or animals are placed in compressed air, the blood passing through lungs takes up an amount of gas in simple solution. This amount increases in proportion to the increase in partial pressure of each gas present in the alveolar air.