OROPHARYNGEAL AIRWAY : SIZE: 00, 0, 1, 2, 3, 4

An oropharyngeal airway (OPA) is a medical device used to maintain an open airway in unconscious or sedated patients who are at risk of airway obstruction. It's a curved, rigid or flexible tube that is inserted into the patient's mouth to prevent the tongue from obstructing the airway and to facilitate ventilation.