What term best describes a loud, high-pitched continuous sound heard (often with the unaided ear) primarily over the larynx or trachea during inhalation in patients with upper airway obstruc-tion?

a. Stridor
b. Rhonchi
c. Crackles
d. Wheeze

ANS: A
Another continuous type of adventitious lung sounds heard in certain situations, primarily over the larynx and trachea during inhalation, is stridor. Stridor is a loud, high-pitched sound, which sometimes can be heard without a stethoscope. Most common in infants and small children, stri-dor is a sign of obstruction in the trachea or larynx. Stridor is most often heard during inspiration.