Which auscultation finding is most indicative of pulmonary edema?

Which auscultation finding is most indicative of pulmonary edema?

• A. Wheezes
• B. Dullness to percussion
• C. Crackles
• D. Stridor

Answer: (C)

Fluid in the lungs from pulmonary edema changes how air moves through the small airways, producing crackles on auscultation. These are fine, bubbly sounds heard as air flows through fluid-filled alveoli and small airways that transition from closed to open during inspiration. This crackling pattern at the lung bases is classic for edema and helps distinguish it from other lung issues. Wheezes, by contrast, are musical sounds from narrowed airways, seen more with asthma or COPD and can occur with edema but aren’t the characteristic sign. Dullness to percussion suggests denser fluid or solid tissue, such as a pleural effusion or pneumonia, rather than diffuse interstitial edema. Stridor indicates partial obstruction in the upper airway, not the lung parenchyma. So, crackles best indicate pulmonary edema.

Fluid in the lungs from pulmonary edema changes how air moves through the small airways, producing crackles on auscultation. These are fine, bubbly sounds heard as air flows through fluid-filled alveoli and small airways that transition from closed to open during inspiration. This crackling pattern at the lung bases is classic for edema and helps distinguish it from other lung issues.

Wheezes, by contrast, are musical sounds from narrowed airways, seen more with asthma or COPD and can occur with edema but aren’t the characteristic sign. Dullness to percussion suggests denser fluid or solid tissue, such as a pleural effusion or pneumonia, rather than diffuse interstitial edema. Stridor indicates partial obstruction in the upper airway, not the lung parenchyma.

So, crackles best indicate pulmonary edema.