What key indicator shows that an oropharyngeal airway is effective?

The effectiveness of an oropharyngeal airway can be determined by the presence of unobstructed airflow. When air moves freely in and out of the airway, it indicates that the device is positioned correctly, preventing the tongue from blocking the airway and allowing for proper ventilation. This is crucial in emergency situations, particularly for unresponsive patients who may not be able to maintain their airway independently.

While the other indicators mentioned might suggest different aspects of the patient's condition, they do not serve as direct measures of the effectiveness of the airway. For instance, if a patient's breathing becomes fast, it may indicate anxiety or distress rather than successful airway management. Additionally, an unresponsive patient can still have an effective airway, and signs of discomfort could suggest improper placement or irritation, which would signal that the airway may not be functioning correctly. Hence, the key indicator of effective ventilation through an oropharyngeal airway is the unobstructed movement of air.