TY - CHAP M1 - Book, Section TI - Stridor and Drooling in Infants and Children A1 - Parikh, Rushi R. A1 - Huang, Craig J. A2 - Tintinalli, Judith E. A2 - Ma, O. John A2 - Yealy, Donald M. A2 - Meckler, Garth D. A2 - Stapczynski, J. Stephan A2 - Cline, David M. A2 - Thomas, Stephen H. Y1 - 2020 N1 - T2 - Tintinalli's Emergency Medicine: A Comprehensive Study Guide, 9e AB - Stridor is characterized as a high-pitched, harsh, monophonic sound produced by turbulent airflow through a partially obstructed airway.1 Both inspiratory and expiratory stridor are associated with airway obstruction. As air is forced through a narrow tube, it undergoes an increase in speed and a decrease in pressure (Bernoulli’s principle). The decrease in lateral pressure causes the walls of the airway to temporarily collapse and vibrate, generating this stridulous sound. Hagen-Poiseuille’s law shows that resistance to laminar airflow increases markedly with small decreases in the airway’s radius.2 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=1166593974 ER -