What is the recommended treatment for hypoxia in diving when symptoms are present?

• A. Surface, administer 100% O2
• B. Descend to deeper depths
• C. Decrease oxygen delivery
• D. Delay treatment and monitor

Answer: (A)

When hypoxia is present during a dive, the priority is to restore oxygen delivery as quickly as possible. The best action is to surface as soon as it is safe and breathe 100% oxygen on the surface. Giving pure oxygen maximizes the oxygen content that can reach the blood and tissues, rapidly correcting low oxygen levels and reducing the risk of organ damage.

Descending to deeper depths would not help; it increases ambient pressure and gas-related problems and does not improve oxygen uptake. Decreasing oxygen delivery obviously worsens hypoxia, and delaying treatment only prolongs tissue starvation.

So, surfacing promptly and providing 100% oxygen is the most effective immediate treatment for hypoxia with symptoms. Seek medical evaluation after stabilization.