Objective physical data describe air moving through small airways over the lung's periphery. The expected inspiratory-to-expiratory phase of this normal vesicular breath sound is which of the following?
a. The inspiratory phase lasts exactly as long as the expiratory phase.
b. The expiration phase is longer than the inspiration phase.
c. The expiration phase is two times longer than the inspiration phase.
d. The inspiratory phase is three times longer than the expiratory phase.
ANS: D
Vesicular breath sounds are normal breath sounds; the inspiratory phase is three times longer than the expiratory phase. Bronchovesicular breath sounds have an inspiratory phase equal to the expiratory phase. Bronchial breath sounds have an expiration phase longer than the inspiration phase at a 3:2 ratio.
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