Guedel Airway

A Guedel airway (oropharyngeal airway) is a rigid plastic or rubber medical device used to keep the air passage open in unconscious or semi-conscious patients. 

Key Functions & Anatomy

• Prevents Obstruction: Lifts and displaces the tongue forward so it cannot fall back against the posterior pharyngeal wall. 
  
• Bite Block: Features an integrated hard bite block to prevent the patient from biting their tongue or occluding the airway tube.
  
• Ventilation Support: Allows easy passage for suction catheters and helps facilitate bag-valve-mask (BVM) or mechanical ventilation. 
  
• Main Parts: Consists of a flange at the lips, a bite block, a curved hollow airway channel, and a distal tip. 
  

• Measurement: Sized by measuring the distance from the corner of the patient's mouth (or front incisors) to the angle of the jawline (or ear tragus). 
  
• Sizes: Available in a range of color-coded sizes from pediatric (e.g., 000, 00, 0) up to large adult sizes. Using a wrong size can push the tongue further back or fail to relieve the obstruction. 

• Indication: Strictly used in unconscious patients who lack protective airway reflexes; if a patient is alert enough to have an active gag reflex, it may trigger vomiting or coughing. 
  
• Standard Method: Often inserted upside down (with the tip pointing toward the roof of the mouth) until reaching the junction of the hard and soft palate, then rotated 180° to follow the natural contour of the tongue. Alternatively, a tongue depressor is used to guide it directly without rotation.