Course Outline

Body air spaces, such as the lungs, ears, and sinuses, can suffer barotrauma (pressure injury) on descending or ascending. During descending or ascending, the hydrostatic pressure changes. Trouble occurs if the diver fails to equalize the air space. On descending, a barotrauma is called a squeeze. On ascending, a barotrauma is called a reverse block, reverse squeeze, or expansion injury.

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