Hyperbaric oxygen therapy

Published on 13/02/2015 by admin

Filed under Anesthesiology

Last modified 13/02/2015

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Hyperbaric oxygen therapy

Klaus D. Torp, MD, Neil G. Feinglass, MD, FASE, FCCP and Timothy S.J. Shine, MD

Hyperbaric O2 therapy (HBOT) refers to the inhalation of 100% O2 in an environment in which the barometric pressure is greater than 1 atmosphere. Note that 1 atmosphere absolute (ATA) is the pressure at sea level. For every increase in ambient pressure of 760 mm Hg, or 14.7 psi or 33 feet of seawater, the pressure increases by 1 ATA. Exposure to increased gas pressures can occur in other situations, such as breathing compressed gas mixtures while diving (scuba) or working in underground tunnels (caisson workers). For HBOT, the pressure in a hyperbaric chamber is typically at least 1.4 ATA.

All gases follow fundamental gas laws: