What should first aid measures for an unconscious scuba diver consider?

First aid measures for an unconscious scuba diver should consider drowning, air embolism, and decompression sickness because these are critical issues that can arise from scuba diving and would pose immediate threats to the diver's life.

Drowning is a primary concern since an unconscious diver may not be able to maintain their airway, leading to suffocation or aspiration of water. Quick assessment and rescue from the water, along with effective airway management, are vital.

Air embolism occurs when air bubbles enter the bloodstream, typically due to rapid ascent or improper exhalation while surfacing. This can result in serious and life-threatening issues such as stroke or heart attack. First aid measures need to focus on providing oxygen and getting the person to medical assistance quickly for recompression therapy.

Decompression sickness, commonly known as the bends, is another serious condition resulting from the formation of nitrogen bubbles in the body due to rapid ascent or exceeding safe dive limits. Recognizing symptoms and acting promptly with first aid—like administering oxygen and seeking emergency evacuation—is crucial to prevent long-term health consequences.

Collectively, these conditions represent a comprehensive initial response strategy for unconscious scuba divers, where each potential emergency must be addressed promptly to minimize the risk of fatality or severe health implications.