Nasal flaring
Outward movement of the nostrils with breathing; indicates increased work of breathing and respiratory distress.
Rales
Abnormal rattling sound heard when auscultating the lungs; also called crackles
Retractions
Visible sinking of the chest wall during inhalation; indicates increased work of breathing and respiratory distress. Medical emergency in pediatric cases.
Rhonchi
Abnormal coarse rattling sound heard when auscultating the lungs.
Stridor
A harsh vibrating noise heard in the upper airway when breathing; usually a sign of airway blockage.