What score indicates high risk for difficult intubation?

A total El-Ganzouri score of 4 or higher is the validated threshold for high risk. Scores below 4 indicate low predicted difficulty, though no single score rules out difficulty entirely.

How is thyromental distance measured?

With the neck fully extended, measure the distance in centimeters from the tip of the mandibular mentum (chin) to the thyroid notch. A distance less than 6 cm scores 2 points; 6–6.5 cm scores 1 point; over 6.5 cm scores 0.

What is the Mallampati class?

The modified Mallampati classification is assessed with the patient seated, mouth fully open, tongue maximally protruded, without phonation. Class I (full faucial pillars, soft palate, uvula visible) scores 0; Class II (faucial pillars and soft palate visible, uvula masked by tongue base) scores 1; Class III/IV (only soft palate or hard palate visible) scores 2.

What does "ability to prognath" mean?

The ability to advance the lower incisors in front of (anterior to) the upper incisors (an anterior subluxation maneuver). If the patient can prognath, this suggests adequate atlanto-axial mobility and scores 0. Inability scores 1 point.

Is this tool a substitute for a full airway exam?

No. The El-Ganzouri index is one validated adjunct in airway assessment. Always combine it with a complete physical examination, review of prior anesthetic records, and clinical judgment. Difficult airway algorithms (e.g., ASA, DAS) should guide management.

How does body weight factor in?

Body weight ≥110 kg (approximately ≥240 lbs) contributes 1 point. Obesity is an independent predictor of difficult mask ventilation and intubation due to reduced pharyngeal space, limited neck mobility, and reduced functional residual capacity.

El-Ganzouri Airway Risk Index Calculator

Summary

Score all 7 El-Ganzouri parameters to predict difficult laryngoscopy; a total score ≥4 indicates high risk.

How it works

Assess each of the 7 clinical parameters on the patient prior to induction.
Select the appropriate score value for each parameter using the provided criteria.
The calculator sums all parameter scores into a total El-Ganzouri Risk Index.
A total score of 0–3 indicates low risk; 4–12 indicates high risk for difficult laryngoscopy.
Use the result alongside your full clinical judgment and institutional airway protocols.
Document the score in the pre-anesthetic assessment for the procedural record.

Use cases

Pre-operative airway assessment before general anesthesia.
Deciding whether to proceed with standard vs. awake fiber-optic intubation.
Anesthesia resident education on structured airway evaluation.
Rapid bedside scoring in the pre-op holding area.
Documenting airway risk for medico-legal and quality purposes.
Teaching the multi-parameter approach to difficult airway prediction.

El-Ganzouri Airway Risk Index

Airway Parameters

Risk Score Result

Breakdown