What is the correct way to measure an oropharyngeal airway (OPA) for a patient?

What is the correct way to measure an oropharyngeal airway (OPA) for a patient?

• A. Ear lobe to nostril
• B. Ear lobe to chin
• C. Angle of jaw to corner of lips
• D. Mandibular joint to nostril

Answer: (C)

Sizing an oropharyngeal airway hinges on placing the tip at the right depth so the tongue is held away from the airway without causing trauma or a gag reflex. The correct way to measure is from the angle of the jaw to the corner of the mouth. This length places the distal tip near the base of the tongue, effectively keeping the airway open by preventing the tongue from occluding the oropharynx. If the airway is too long, it can press on delicate tissues, provoke gagging, or push structures in a way that worsens obstruction. If it’s too short, it won’t adequately lift the tongue, and the airway may remain blocked. The other measurement methods are used for different devices or do not position the OPA correctly.

Sizing an oropharyngeal airway hinges on placing the tip at the right depth so the tongue is held away from the airway without causing trauma or a gag reflex. The correct way to measure is from the angle of the jaw to the corner of the mouth. This length places the distal tip near the base of the tongue, effectively keeping the airway open by preventing the tongue from occluding the oropharynx.

If the airway is too long, it can press on delicate tissues, provoke gagging, or push structures in a way that worsens obstruction. If it’s too short, it won’t adequately lift the tongue, and the airway may remain blocked. The other measurement methods are used for different devices or do not position the OPA correctly.