The tongue is the most common airway obstruction in an unconscious patient. Insertion an oropharyngeal airway helps keep the patient’s tongue from falling to the back of the pharynx, causing an airway obstruction. The oropharyngeal airway is sometimes called an OPA or simply an oral airway. Indications for using an oral airway. Contraindication for an oral airway and an alternative airway that can be used for patients with an intact gag reflex. Measuring an OPA and possible complications from inserting one that's too small or too large. Two techniques to properly insert an OPA. The use of an oral airway during CPR. The use of an OPA as a bite block after a patient has an advanced airway placed. Connect with me: Website:  https://passacls.com @PassACLS on X (formally known as Twitter) @Pass-ACLS-Podcast on LinkedIn Give back - buy Paul a bubble tea here Good luck with your ACLS class!