"Airway Obstruction" . "Airway obstruction" . "obstruction of the airway" . "Chronic airway obstruction" . . . . "airway obstruction/rupture" . . . "'''O'''bstruction" . . "airway obstruction" . . "Obstruction" . . "airway blockage" . "blockage of the airway" . . . . . . . . . "obstruction" . . . . . "lung blockage" . "blocked his airway" . . . . "obstructing" . . "airflow obstruction" . . . . . . . "obstructive airway disease" . . . . . . . . . . . . "obstructions of airways" . . "Airway obstruction" . . "D000402" . . "Obstruction of the airway" . .