What is the maximum extension for a loss of oxygen repaired within 2 hours?

The correct answer pertains to specific treatment protocols utilized in hyperbaric medicine, particularly for managing a situation where there has been a loss of oxygen. In this context, the maximum extension provided by treatment table 5, 6, or 6a is applicable for a situation where an emergency repair has been made within a two-hour window.

When a loss of oxygen occurs and is swiftly addressed, following these established treatment tables allows for a structured and standardized approach to restore safety and ensure that the diver's condition is managed effectively. Each table outlines the parameters and duration of treatment at various depths, making it crucial for maintaining a diver's well-being following an incident such as this.

The other options may not provide the necessary structure or adherence to established protocols expected in hyperbaric treatment settings. For instance, resuming diving immediately could pose serious risks without thorough reassessment, while maintaining depth until reassessment might not prioritize immediate corrective action, and switching to another treatment protocol could lead to confusion or mismanagement of the situation without proper justification. Therefore, adhering to the maximum extensions outlined in the designated treatment tables is the most prudent and acceptable course of action.