بسم الله الرحمن الرحيم. Acute Stridor. By Yehia Abo Arida Ward 7. Stridor. It is a harsh, high-pitched respiratory sound, which is usually inspiratory but it can be biphasic and is produced by turbulent airflow; it is not a diagnosis but a sign of upper airway obstruction . .
Yehia Abo Arida
Is derived from an oldscottish word , roup , whichmeans to cry out in a hoarse voice .