What can confusion be a sign of in diving injuries?

• A. Hypoxia, Hypercapnia, and Oxygen toxicity
• B. Decompression sickness
• C. Nitrogen narcosis
• D. Barotrauma

Answer: (A)

Confusion during a dive points to brain-level disturbance from gas-related problems. If the brain isn’t getting enough oxygen (hypoxia) or is exposed to too much carbon dioxide (hypercapnia) due to ventilation or equipment issues, cognitive function can falter and the diver becomes confused or disoriented. CNS oxygen toxicity is another scenario where high oxygen levels at depth can impair the brain, with confusion as an early sign and potential progression to seizures if not addressed. These mechanisms explain why confusion is most directly associated with hypoxia, hypercapnia, and oxygen toxicity.

Decompression sickness can involve neurological symptoms, and nitrogen narcosis can cause disorientation at depth, but the immediate, common link to confusion is related to oxygen delivery and toxic effects. Barotrauma tends to present with pain and injury at pressure-related sites rather than primarily causing confusion.