If O2 is restored after 15 minutes to 2 hours of a loss, what is the next step?

The correct choice is to complete treatment with maximum O2 extensions if originally using Tables 5, 6, or 6A. This approach is critical because, in hyperbaric oxygen therapy scenarios, when oxygen supply is restored after a significant loss of time, it is essential to ensure the treatment is completed to maximize therapeutic benefits.

Continuing the treatment using the designated tables (5, 6, or 6A) ensures that the patient receives the full prescribed dose of oxygen needed to effectively address their condition, such as decompression sickness or carbon monoxide poisoning. These tables provide specific guidelines on how to administer oxygen under varying conditions of depth and duration of exposure, which is fundamental for optimal recovery.

Returning to the point of interruption may not properly address the full treatment protocols required, and canceling treatment or exiting the chamber immediately would compromise the effectiveness of the therapy that was in progress. Ensuring that treatment continues appropriately is crucial for patient safety and recovery outcomes.