El-Ganzouri Risk Index (EGRI) — Difficult Airway Prediction

The El-Ganzouri Risk Index (EGRI) is a validated pre-operative airway risk assessment score developed to predict difficult laryngoscopy and difficult intubation. It incorporates 7 independently weighted clinical variables: mouth opening, thyromental distance, Mallampati class, neck mobility, ability to prognath, weight, and history of difficult intubation. A score ≥ 4 identifies high risk for difficult laryngoscopy/intubation (sensitivity ~60%, specificity ~90%). EGRI was derived in a large prospective cohort of 10,000 patients.