Which statement is true regarding the onset of lung overexpansion injury symptoms?

The statement regarding the onset of lung overexpansion injury symptoms being usually slower than decompression sickness is accurate. Lung overexpansion injuries, often resulting from rapid ascents while holding air in the lungs, can manifest symptoms within minutes, but they don't always present as quickly as decompression sickness (DCS), which may happen rapidly based on factors like depth, ascent rate, and individual physiology.

Decompression sickness occurs when bubbles form in the body due to a rapid decrease in pressure, and symptoms can develop quickly upon surfacing after deep dives. In contrast, lung overexpansion injury symptoms can take longer to become apparent and may include chest pain, difficulty breathing, or coughing up blood. This delay is vital for divers to recognize, as it reinforces the importance of ascending slowly and safely to avoid both DCS and lung injuries.

The misconception here would be that symptoms being immediately apparent for lung overexpansion injuries is common, which is not the case. While immediate awareness of symptoms can occur in certain scenarios, it generally takes longer and can vary based on the situation. Understanding the nuanced timeline of these symptoms is crucial for informed diving practices and safety.