Oxygen tolerance test : A standardised protocol

Abstract

Introduction: Oxygen toxicity is a major limiting factor in underwater combat operations and Clearance diving operations. It is imperative to screen in the induction phase of military diving, those individuals who have lower threshold of oxygen toxicity to avoid it during combat diving operations. In addition, susceptibility to oxygen toxicity is a n entity not only for combat diver but for all divers as in the event of Decompression Sickness (DCS), they shall be exposed to oxygen partial pressures up to 2.8 ATA for prolonged durations as part of standard treatment protocols. A susceptible individual might suffer from oxygen toxicity during a therapeutic recompression. Oxygen Tolerance Test: Oxygen Tolerance Test is a standardised procedure to evaluate the oxygen susceptibility of prospective divers. A physiologically sound protocol based on internationally accepted norms has been developed. Standards of Fitness and Unfitness have also been clearly delineated. Conclusion: By following a standardised protocol for Oxygen Tolerance Test, an objective assessment and recordkeeping is possible. This shall entail a more effective screening during the initial diving medical examination.

Keywords

• Decompression Sickness (DCS)
• Paul Bert Effect
• Oxygen Tolerance Test (OTT)
• National Oceanic and Atmospheric Administration (NOAA)