Decompression sickness occurs when gas bubbles form in tissues due to rapid decompression; what are typical causes in aircrew?

Decompression sickness occurs when gas bubbles form in tissues due to rapid decompression; what are typical causes in aircrew?

• A. Rapid ascent or inadequate cabin pressurization
• B. Prolonged exposure to cold
• C. Dehydration from high altitude
• D. Hyperventilation during sleep

Answer: (B)

Decompression sickness happens when nitrogen dissolved in tissues and blood comes out of solution as bubbles because ambient pressure drops faster than the body can accommodate. In aircrew, the typical triggers are rapid changes in cabin pressure, such as a sudden loss of pressurization or an abrupt ascent to altitude without allowing gradual decompression. This quick pressure decrease directly causes the inert gas to form bubbles that can affect bones, tissues, and blood vessels. Prolonged cold, dehydration, or hyperventilation during sleep aren’t the primary mechanisms behind bubble formation. Cold can cause other problems like hypothermia or frostbite, dehydration may worsen general health but doesn’t drive bubble formation, and sleep-time hyperventilation doesn’t create the gas bubbles responsible for DCS.

Decompression sickness happens when nitrogen dissolved in tissues and blood comes out of solution as bubbles because ambient pressure drops faster than the body can accommodate. In aircrew, the typical triggers are rapid changes in cabin pressure, such as a sudden loss of pressurization or an abrupt ascent to altitude without allowing gradual decompression. This quick pressure decrease directly causes the inert gas to form bubbles that can affect bones, tissues, and blood vessels.

Prolonged cold, dehydration, or hyperventilation during sleep aren’t the primary mechanisms behind bubble formation. Cold can cause other problems like hypothermia or frostbite, dehydration may worsen general health but doesn’t drive bubble formation, and sleep-time hyperventilation doesn’t create the gas bubbles responsible for DCS.