TY - CHAP M1 - Book, Section TI - Stridor and Drooling in Infants and Children A1 - Mapelli, Elisa A1 - Sabhaney, Vikram A2 - Tintinalli, Judith E. A2 - Stapczynski, J. Stephan A2 - Ma, O. John A2 - Yealy, Donald M. A2 - Meckler, Garth D. A2 - Cline, David M. PY - 2016 T2 - Tintinalli’s Emergency Medicine: A Comprehensive Study Guide, 8e AB - Stridor is a high-pitched, harsh sound produced by turbulent airflow through a partially obstructed airway. Both inspiratory and expiratory stridor are associated with airway obstruction. As air is forced through a narrow tube, it undergoes a decrease in pressure (the Venturi effect). The decrease in lateral pressure causes the airway walls to collapse and vibrate, generating stridor. Airway resistance is inversely proportional to the fourth power of the airway radius. This translates into a 16-fold increase in resistance when the radius is reduced by half. Even 1 mm of edema in the normal pediatric subglottis reduces its cross-sectional area by >50%. A small amount of inflammation can result in significant airway obstruction in children. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1121496846 ER -