Final answer:
A tongue depressor may be used when inserting an oropharyngeal airway in an anesthetized patient to prevent the tongue from obstructing the airway.
Step-by-step explanation:
You may use a tongue depressor when inserting an oropharyngeal airway in a patient under general anesthesia. Under anesthesia, patients lose control over their muscles, including those in the tongue which may relax and obstruct the airway. Therefore, a healthcare professional may use a tongue depressor to depress the patient's tongue to ensure a clear path for the insertion of an oropharyngeal airway apparatus. This apparatus helps maintain an open airway by preventing the tongue from covering the epiglottis, which could block the passage of air.