Which sign is characteristic of smoke inhalation injury?

Which sign is characteristic of smoke inhalation injury?

• A. Singed facial hairs
• B. Watery, irritated eyes
• C. Dyspnea, tachypnea
• D. Abnormal breath sounds (stridor, wheezes, crackles)

Answer: (D)

Inhalation injury directly affects the airway, causing inflammation and edema that narrow and irritate the airways. The most telling sign is abnormal breath sounds on auscultation, which reflect this airway involvement. Stridor signals upper airway swelling and obstruction, wheezes indicate bronchospasm and narrowed bronchi, and crackles can point to alveolar or interstitial involvement. These adventitious sounds show that the inhalation injury has reached the airway and lungs. While singed facial hairs or eye irritation can indicate exposure, they don’t show the airway damage itself, and dyspnea or tachypnea are less specific. So, abnormal breath sounds best capture the characteristic airway injury from smoke inhalation.

Inhalation injury directly affects the airway, causing inflammation and edema that narrow and irritate the airways. The most telling sign is abnormal breath sounds on auscultation, which reflect this airway involvement. Stridor signals upper airway swelling and obstruction, wheezes indicate bronchospasm and narrowed bronchi, and crackles can point to alveolar or interstitial involvement. These adventitious sounds show that the inhalation injury has reached the airway and lungs. While singed facial hairs or eye irritation can indicate exposure, they don’t show the airway damage itself, and dyspnea or tachypnea are less specific. So, abnormal breath sounds best capture the characteristic airway injury from smoke inhalation.