El-Ganzouri Risk Index (difficult intubation)
El-Ganzouri difficult-airway risk index (0-12): seven airway predictors mapped to the >= 4 difficult-laryngoscopy threshold.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Mouth opening
- < 4 cm (1)
- Thyromental distance
- 6.0–6.5 cm (1)
- Mallampati class
- III (1)
- Neck movement
- 80–90° (1)
- Ability to prognath
- Yes
- Body weight
- < 90 kg (0)
- History of difficult intubation
- None (0)
Result: El-Ganzouri 4/12: at or above the >= 4 difficult-laryngoscopy threshold.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Score 0-12
- seven factors -- mouth opening, thyromental distance, Mallampati, neck movement, prognath, weight, prior difficult intubation -- each 0/1/2 (mouth and prognath cap at 1).
- Threshold
- a total >= 4 is the commonly cited threshold for difficult laryngoscopy. The quantitative companion to the lemon bedside screen.
What you enter
- Mouth opening (interincisor gap)
- Thyromental distance
- Mallampati class
- Neck movement (range of motion)
- Ability to prognath (protrude jaw)
- Body weight
- History of difficult intubation
How this is calculated
el-Ganzouri AR, McCarthy RJ, Tuman KJ, et al. Preoperative airway assessment: predictive value of a multivariate risk index. Anesth Analg. 1996;82(6):1197-1204. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.