El-Ganzouri Risk Index (EGRI) for Difficult Airway
EGRI Calculator
Mouth Opening
Thyromental Distance
Mallampati Class
Neck Movement
Ability to Prognath
Body Weight
History of Difficult Intubation
Total EGRI Score:
–
Score: 0
Default scoring assumes 0 for un-set fields.
Predicts risk of difficult airway.
When to Use
Use in patients undergoing general anesthesia.
Formula
Addition of the selected points: Variable Points Mouth opening ≥4 cm 0 <4 cm 1 Thyromental distance >6.5 cm 0 6.0-6.5 cm 1 <6.0 cm 2 Modified Mallampati Classification I (soft palate, fauces, uvula, and pillars seen) 0 II (soft palate, fauces, and uvula seen) 1 III (soft palate and base of uvula seen) 2 IV (soft palate not visible) 2 Neck movement >90° 0 80-90° 1 <80° 2 Ability to prognath (advance lower jaw forward) Yes 0 No 1 Weight <90 kg (198.4 lbs) 0 90-110 kg (198.4-242.5 lbs) 1 >110 kg (242.5 lbs) 2 History of difficult intubation None 0 Questionable 1 Definite 2
Pearls / Pitfalls
"Difficult airway" was defined as inability to visualize laryngeal structures and epiglottis, or inability to achieve adequate mask ventilation.
Advice
Consider precautions such as video-assisted laryngoscopy or awake intubation in high-risk patients.
More Information
Interpretation: EGRI Risk of difficult airway ≥4 High (93.8% specificity) <4 Low