Define obstruction of upper airway This is a life threatening emergency. In which the respiratory passage gets blocked due to upper airway obstruction which obstructs the free flow of the airway. Write causes of upper airway obstruction Foreign Object: Inhaling or ingesting a foreign object. that block the airway such as food pieces, toys or small items Infection: Epiglottitis and infection in the larynx and pharynges can cause edema and