Which adventitious sounds indicates swelling of the upper airway?

Stridor

- High-pitched, musical sound

- Caused by turbulent airflow through a narrowed upper airway

- Typically heard in conditions that cause swelling or obstruction of the larynx, trachea, or bronchi, such as:

- Croup

- Epiglottitis

- Laryngeal edema

- Tracheal stenosis

- Foreign body aspiration