Q: Stridor due to laryngeal obstruction typically occurs with? (select one)
Stridor is due to the turbulent airflow in the partially obstructed upper airways and can be heard in various forms like wheezing, vibrating, musical, high-pitched or harsh. It most typically occurs with inspiration but can occur in expiration, or both. It is not granted but inspiratory stridor suggests a laryngeal obstruction. Tracheobronchial obstruction usually presents as expiratory stridor, and biphasic stridor suggests a subglottic or glottic obstruction.
1. Stridor in infants and children. Schoem SR, Darrow DH, eds. Pediatric Otolaryngology. Itasca, IL: American Academy of Pediatrics; 2012. 323-52.
2. Tan HKK, Holinger LD. How to evaluate and manage stridor in children. J Respir Dis. 1994. 15(3):245-260.