In atelectasis, which lung sound is most likely heard?

In atelectasis, which lung sound is most likely heard?

• A. Wheezes
• B. Fine Crackles
• C. Stridor
• D. Pleural Friction Rub

Answer: (B)

Atelectasis involves collapse of part of the lung, which reduces ventilation to that area. As the collapsed alveoli begin to re-expand during inspiration, small airways pop open and produce fine inspiratory crackles. This is why fine crackles are the most likely lung sound heard in atelectasis. Wheezes suggest narrowed or obstructed airways, which is not the typical finding for atelectasis. Stridor points to upper airway obstruction, and a pleural friction rub indicates pleuritis, not atelectasis.

Atelectasis involves collapse of part of the lung, which reduces ventilation to that area. As the collapsed alveoli begin to re-expand during inspiration, small airways pop open and produce fine inspiratory crackles. This is why fine crackles are the most likely lung sound heard in atelectasis.

Wheezes suggest narrowed or obstructed airways, which is not the typical finding for atelectasis. Stridor points to upper airway obstruction, and a pleural friction rub indicates pleuritis, not atelectasis.