What should be done if O2 toxicity or convulsions occur during treatment tables 5, 6, and 6A?

Switching the diver to ambient air is the appropriate course of action if O2 toxicity or convulsions occur during treatment tables 5, 6, and 6A. Oxygen toxicity can lead to serious complications, including convulsions, and the immediate priority is to address the diver's safety and health.

When a diver experiences symptoms of oxygen toxicity, reducing the oxygen exposure is critical. By switching to ambient air, the concentration of oxygen in the diver's breathing mixture decreases, alleviating the effects of hyperoxia and allowing the diver's body to recover. This change in the environment helps manage the acute risks associated with elevated oxygen levels.

Continuing with hyperbaric oxygen therapy during an acute episode of O2 toxicity increases the risk of severe complications and might exacerbate the diver’s condition. Therefore, the decision to switch to ambient air not only prioritizes safety but also adheres to standard medical protocols for managing oxygen toxicity situations in dive medicine.