Final answer:
An oropharyngeal airway (OPA) is not used on a conscious victim because it may stimulate the gag reflex and cause the patient to vomit or choke. Endotracheal intubation is the safest procedure to maintain an open airway and is used on conscious patients to ensure their airway is secure and protected from obstructions.
Step-by-step explanation:
An oropharyngeal airway (OPA) is not used on a conscious victim because it may stimulate the gag reflex and cause the patient to vomit or choke. The OPA is a curved device that is inserted into the mouth to keep the airway open, but it can only be used safely on unconscious or anesthetized patients.
On a conscious victim, the safest procedure to maintain an open airway is endotracheal intubation. This involves placing a tube into the trachea to ensure the airway is secure and protected from any obstructions. The tube is removed once the patient starts regaining control of their breathing muscles.