Course Outline

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

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