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NBRC Registered Respiratory Therapist - Blogs Sample Questions

Which of the following is NOT classified as a normal breath sound?

Correct Answer:
adventitious


the question asks to identify which type of breath sound is not normally classified as a regular or expected breath sound when assessing lung function in a clinical setting. understanding the classification of breath sounds is crucial for healthcare professionals to diagnose and treat respiratory conditions effectively.

normal breath sounds include vesicular, bronchovesicular, and bronchial. vesicular sounds are soft and low-pitched, typically heard through most of the lung fields and are the result of air moving through smaller airways like bronchioles. bronchovesicular sounds are intermediate in intensity and pitch, heard around the main bronchus area and between the scapulae. bronchial breath sounds, also known as tubular sounds, are higher in pitch and loud, heard over the trachea and larynx, mainly due to air moving through the large airways.

on the other hand, adventitious breath sounds are those that are not normally heard in the lungs and usually indicate some form of underlying abnormality. these sounds include wheezes, crackles, rhonchi, and stridor, each indicating different types of disruptions in air flow or the presence of fluid or mucus in the airways.

given the classifications, it is clear that the term "adventitious" does not describe a normal breath sound but rather refers to additional sounds superimposed on the normal breathing sounds that suggest pathology. hence, "adventitious" is the correct answer to the question as it is not classified as a normal breath sound.