What is the recommended treatment for CNS O2 toxicity?

The recommended treatment for CNS oxygen toxicity is to shift the breathing mixture to a gas with a lower partial pressure of oxygen. This approach involves changing the divers' breathing gas to one that reduces the oxygen concentration. The rationale behind this treatment is that decreasing the amount of oxygen being inhaled helps to alleviate the toxic effects on the central nervous system.

When divers are exposed to high levels of oxygen, particularly during deep dives or prolonged exposure to hyperbaric conditions, the risk of CNS oxygen toxicity increases, leading to potential neurological symptoms such as convulsions, visual disturbances, and loss of coordination. By shifting to a different gas mixture, you effectively lower the risk of these toxic effects and allow the body a better chance to recover from the high levels of oxygen.

While helmet ventilation can assist in reducing the buildup of carbon dioxide and ensuring adequate oxygen delivery in some situations, it does not address the fundamental issue of excessive oxygen levels. Administering 100% oxygen is counterproductive in cases of CNS oxygen toxicity, as it can worsen the situation. Therefore, the most effective intervention is to adjust the breathing gas accordingly.