How do you select the correct-size oral airway for a small child?

Selecting the correct-size oral airway for a small child involves specific anatomical measurements to ensure that the airway maintains patency without causing damage or obstruction. Measuring from the corner of the patient's mouth to the angle of the jaw is appropriate because it corresponds to the distance needed to accommodate the oral airway properly within the pharynx. This measurement accounts for the natural curvature and size of a child's anatomy, helping to ensure that the airway is neither too long, which could cause injury, nor too short, which could result in inadequate airway support.

This method ensures that the airway will fit snugly and effectively, allowing for proper ventilation without compromising the child's safety. Other options may reference anatomical points that do not relate as closely or appropriately to the size and placement required for an effective oral airway in pediatric patients.