In the field, a diver suspected of decompression sickness should be transported to which facility?

• A. Closest emergency department
• B. General hospital without hyperbaric capability
• C. Hyperbaric chamber (recompression facility)
• D. Home

Answer: (C)

Decompression sickness is best treated with recompression in a hyperbaric chamber. The hyperbaric environment increases ambient pressure, which shrinks nitrogen bubbles in the tissues and blood and drives dissolved nitrogen back into solution so it can be eliminated safely. This treatment is time-sensitive—the sooner it begins, the better the chance of reducing symptoms, especially if there are neurological signs or severe joint/muscle pain.

In the field, the priority is to transport the diver to the nearest facility that has a hyperbaric chamber and staff trained to treat DCS. While waiting, provide high-flow 100% oxygen to help with gas exchange and avoid altitudes or air travel, which can worsen the condition. A facility without hyperbaric capability cannot provide definitive treatment, and arriving home or at a general hospital lacking hyperbaric access would delay essential care.