New York Certified First Responder (CFR) State Practice Exam 2025 - Free CFR Practice Questions and Study Guide

Stridor is a high-pitched sound that occurs during breathing, particularly during inhalation, and it is a classic sign associated with upper airway obstruction. This sound is produced when air flows through narrowed airways, commonly caused by conditions such as swelling from an allergic reaction, structures constricting the airway, or foreign body obstruction.

Stridor serves as an important indicator for first responders, alerting them that the patient's upper airway may be compromised, necessitating immediate assessment and intervention. Recognizing stridor helps responders distinguish between the different types of respiratory issues and prioritize treatment accordingly, as upper airway obstructions can lead to significant respiratory distress and potential respiratory failure.

Other respiratory sounds, such as rales, wheezing, and labored breathing, indicate different types of conditions and pulmonary issues, but they are not specifically indicative of upper airway obstruction. Rales often indicate fluid in the lungs, while wheezing is typically associated with lower airway constriction or obstruction. Labored breathing can suggest difficulty with breathing but does not specifically identify the location of the obstruction within the respiratory system.