Which sign is most consistent with smoke inhalation injury?

Which sign is most consistent with smoke inhalation injury?

• A. Hypotension
• B. Black particles in airway
• C. Cough
• D. Fever

Answer: (B)

The key sign of smoke inhalation injury is deposition of soot in the airway. Black particles in the airway indicate that inhaled smoke contained particulate matter that has entered and irritated the respiratory tract, reflecting direct airway involvement from the injury. This soot can be seen in the airway or in sputum and is a distinctive, early clue of inhalation injury. Cough can occur with many airway irritants and infections and isn’t specific to inhalation injury. Fever is more indicative of infection or inflammatory processes that develop later, not the immediate inhalation injury itself. Hypotension is a systemic sign that can occur with severe injury or shock but does not specifically indicate inhalation injury. Therefore, black particles in the airway best match the expected, direct effect of inhaling smoke.

The key sign of smoke inhalation injury is deposition of soot in the airway. Black particles in the airway indicate that inhaled smoke contained particulate matter that has entered and irritated the respiratory tract, reflecting direct airway involvement from the injury. This soot can be seen in the airway or in sputum and is a distinctive, early clue of inhalation injury.

Cough can occur with many airway irritants and infections and isn’t specific to inhalation injury. Fever is more indicative of infection or inflammatory processes that develop later, not the immediate inhalation injury itself. Hypotension is a systemic sign that can occur with severe injury or shock but does not specifically indicate inhalation injury. Therefore, black particles in the airway best match the expected, direct effect of inhaling smoke.