What should you do if a diver experiences symptoms of DCI after a dive?

Administering emergency oxygen and first aid is the appropriate response for a diver experiencing symptoms of decompression illness (DCI) after a dive. Emergency oxygen is critical in this situation as it helps to off-gas nitrogen from the diver's body, reducing the effects of DCI and improving the diver's chances for recovery. Quick action can significantly improve the outcome for the affected diver, as delays in treatment may lead to more severe symptoms or complications.

First aid is equally important, as it ensures that the diver is stabilized while awaiting further medical assistance. This involves monitoring the diver's condition and providing comfort, as well as preparing them for transport to a medical facility capable of providing hyperbaric treatment.

In contrast, ignoring symptoms or delaying action undermines the seriousness of DCIs and can result in life-threatening complications. Additionally, administering first aid should be done regardless of whether the rescuer is trained, as basic supportive measures can still be beneficial. The priority must always be to address any symptoms promptly and to seek professional medical help as soon as possible.