Breathe Easy and Ace the 2025 NCA Respiratory Exam – Your Path to Success!

Question: 1 / 400

Which lung sound is associated with fine bubbling?

Wheezes

Rhonchi

Crackles

Fine bubbling lung sounds are specifically referred to as crackles. These sounds are typically caused by the presence of fluid in the airways or the alveoli, which creates a popping or crackling noise when air passes through these fluids during breathing. Crackles can be further classified into fine and coarse types, with fine crackles often being associated with conditions such as pulmonary edema, pneumonia, or interstitial lung disease.

Understanding the nature of crackles is important because they can provide clinicians with significant diagnostic information. For instance, fine crackles are often observed during the late inspiratory phase of breathing and are commonly heard in conditions that affect the lung's interstitial tissue or cause fluid accumulation.

In contrast, the other lung sounds refer to different pathological processes. Wheezes are continuous, high-pitched sounds often heard in conditions like asthma or bronchoconstriction, while rhonchi are deeper, sonorous sounds typically indicative of secretions in the larger airways. Friction rubs are associated with the inflamed pleura rubbing against each other, producing a dry, grating sound.

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Friction rub

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