What is the correct procedure for the first O2 hit?

The correct procedure for the first oxygen hit being off O2 and waiting for symptoms to subside is based on the understanding that the initial reaction to a potential oxygen toxicity or hyperoxic condition involves discontinuing oxygen flow. This allows the body to recover from any acute symptoms caused by too much oxygen consumption.

In situations of oxygen toxicity, it's important to remove the source of excess oxygen to prevent further complications. By stopping the oxygen supply, you give the user a chance to stabilize and address symptoms without introducing more disruptive oxygen levels. Monitoring and waiting for symptoms to diminish before considering further action is essential to ensure safety and recovery.

The focus is on a managed withdrawal of oxygen to mitigate any acute adverse effects. Thus, this response supports a cautious approach to handling the respiratory conditions linked to oxygen therapy.