Rhonchi heard in the large airways are most commonly due to what?

Rhonchi heard in the large airways are most commonly due to what?

• A. Pneumothorax
• B. Mucus in the airways
• C. Obstruction by a foreign body
• D. Fine crackles

Answer: (B)

Rhonchi are low-pitched, coarse sounds heard over the trachea and large airways, caused by turbulence from secretions as air moves past mucus or other debris. The best choice is mucus in the airways because this secretary material creates those snoring, rumbling sounds that often clear with coughing, reflecting partial obstruction in the larger airways. Pneumothorax typically produces absent or decreased breath sounds and other signs like hyperresonance, not rhonchi. Obstruction by a foreign body can cause wheezing or decreased breath sounds and may be sudden, but it doesn’t characteristically produce the persistent coarse rhonchi associated with secretions in large airways. Fine crackles arise from fluid in smaller airways and alveoli, not the large airways, so they sound different and occur at a different depth of the respiratory tree.

Rhonchi are low-pitched, coarse sounds heard over the trachea and large airways, caused by turbulence from secretions as air moves past mucus or other debris. The best choice is mucus in the airways because this secretary material creates those snoring, rumbling sounds that often clear with coughing, reflecting partial obstruction in the larger airways.

Pneumothorax typically produces absent or decreased breath sounds and other signs like hyperresonance, not rhonchi. Obstruction by a foreign body can cause wheezing or decreased breath sounds and may be sudden, but it doesn’t characteristically produce the persistent coarse rhonchi associated with secretions in large airways. Fine crackles arise from fluid in smaller airways and alveoli, not the large airways, so they sound different and occur at a different depth of the respiratory tree.