What is the normal finding on lung auscultation?

Vesicular sounds are considered normal findings during lung auscultation in healthy individuals. These sounds are characterized by a soft, low-pitched quality, and they typically have an inspiratory phase that is longer than the expiratory phase. This pattern reflects the normal airflow through the small airways and alveoli, suggesting that there is unobstructed airflow and healthy lung tissue.

In contrast, bronchial sounds, which might be heard over larger airways, should not be present over peripheral lung fields; if they are, it may indicate underlying pathology. Wheezing, which is a high-pitched sound heard primarily during expiration, often signifies airway constriction or obstruction. Crackles, particularly when noted at lung bases during auscultation, can indicate the presence of fluid in the lungs or other pathological changes, which is not a normal finding. Thus, the identification of vesicular sounds with a longer inspiratory phase is indicative of normal lung function.