What does the term “oxygen exposure” refer to?

The term "oxygen exposure" specifically refers to the amount of oxygen a diver is exposed to at varying pressures. This concept is important in understanding the potential risks associated with using oxygen in diving environments, particularly with regard to the effects of increased partial pressure of oxygen that occurs at greater depths. Higher partial pressures can lead to oxygen toxicity, which is a critical consideration for divers utilizing enriched air nitrox mixtures.

Understanding oxygen exposure involves calculating the partial pressure of oxygen based on the diving depth and analyzing the cumulative effects of oxygen exposure over time. This knowledge helps divers manage their diving profiles appropriately to stay within safe limits and protect their health during and after dives.