Quick Reference Guide on the Units of Measure in Hyperbaric Medicine
Quick Reference Guide on the Units of Measure in Hyperbaric Medicine This quick reference guide is excerpted from Dr. Eric Kindwall’s chapter “The Physics of Diving and Hyperbaric Pressures” in Hyperbaric Medicine Practice, 3rd edition. www.BestPub.com All Rights Reserved 25 THE PHYSICS OF DIVING AND HYPERBARIC PRESSURES Eric P. Kindwall Copyright Best Publishing Company. All Rights Reserved. www.BestPub.com INTRODUCTION INTRODUCTIONThe physics of diving and hyperbaric pressure are very straight forTheward physicsand aofr edivingdefi nanded hyperbaricby well-k npressureown a nared veryacce pstraightforwardted laws. Ga sandu narede r definedpres subyr ewell-knowncan stor eande nacceptedormous laws.ene rgGasy, underthe apressuremount scanof storewhi cenormoush are o fenergy,ten the samountsurprisin ofg. whichAlso, s arema loftenl chan surprising.ges in the pAlso,erce smallntage schangesof the inva rtheiou spercentagesgases use dofa there variousgrea gasestly m usedagni fareied greatlyby ch amagnifiednges in am byb ichangesent pre sinsu ambientre. The pressure.resultan t pTheh yresultantsiologic physiologiceffects d effectsiffer w idifferdely d ewidelypend idependingng on the onp rtheess upressure.re. Thus ,Thus,divi ndivingg or oorpe operatingrating a a hy- perbarichype rfacilitybaric f requiresacility re gainingquires gcompleteaining c oknowledgemplete kn ofow theled lawsge o finvolvedthe law stoin ensurevolved safety.to ensure safety. UNITS OF MEASURE UNITS OF MEASURE This is often a confusing area to anyone new to hyperbaric medicine as both Ameri- This is often a confusing area to anyone new to hyperbaric medicine as can and International Standard of Units (SI) are used. In addition to meters, centimeters, both American and International Standard of Units (SI) are used. In addition kilos,to pounds,meters, andcen feet,time someters, kpressuresilos, po uarend givens, an dinf atmosphereseet, some p rabsoluteessures andare millimetersgiven in of mercury.atmosph Tableeres 1a bgivessolu thete a exactnd m conversionillimeters factorsof me rbetweencury.
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