What should divers avoid to reduce the risk of CNS toxicity while on Nitrox?

To reduce the risk of central nervous system (CNS) toxicity while using Nitrox, it is crucial for divers to avoid repetitive exposures to high partial pressures of oxygen. This is important because when divers breathe a gas mixture containing oxygen, the partial pressure of oxygen increases with depth, which can affect the nervous system. Exposure to high levels of oxygen for extended periods can lead to symptoms such as visual disturbances, muscle twitching, and in severe cases, seizures.

The risk of CNS toxicity is particularly linked to both the depth of the dive and the percentage of oxygen in the gas being breathed. Therefore, it’s vital for divers to monitor their exposure times and the partial pressure of oxygen during dives. Staying within safe limits for the partial pressure can significantly minimize the risk of experiencing CNS effects.

Maintaining awareness of these factors and adhering to dive tables or guidelines that limit exposures to elevated oxygen levels helps ensure that divers remain safe while using Nitrox. This understanding plays a crucial role in dive planning and execution, ensuring that divers can enjoy the benefits of Nitrox while mitigating the risks associated with it.