el_ganzouri_risk_index: El-Ganzouri Risk Index (EGRI) for Difficult Airway

In cliot: Clinical Indices and Outcomes Tools

El-Ganzouri Risk Index (EGRI) for Difficult Airway

Description

Calculates the El-Ganzouri Risk Index (EGRI) to estimate the probability of difficult tracheal intubation. The score ranges from 0 to 12, with a score of 4 or higher indicating a significant risk for difficult intubation.

Usage

el_ganzouri_risk_index(mouth_opening_cm, thyromental_distance_cm, mallampati_score,
                       neck_movement_degrees, can_prognath, weight_kg,
                       history_difficult_intubation)

Arguments

mouth_opening_cm	Numeric. Inter-incisor gap in centimeters. (>=4: 0 pts, <4: 1 pt).
thyromental_distance_cm	Numeric. Thyromental distance in centimeters. (>6.5: 0 pts, 6.0-6.5: 1 pt, <6.0: 2 pts).
mallampati_score	Numeric (1-4). Modified Mallampati Classification. (I-II: 0 pts, III: 1 pt, IV: 2 pts).
neck_movement_degrees	Numeric. Range of neck motion in degrees. (>90: 0 pts, 80-90: 1 pt, <80: 2 pts).
can_prognath	Numeric (0 or 1). Ability to protrude jaw (prognath). (1 = Yes: 0 pts, 0 = No: 1 pt).
weight_kg	Numeric. Patient body weight in kilograms. (<90: 0 pts, 90-110: 1 pt, >110: 2 pts).
history_difficult_intubation	String. History of difficult intubation. Options: "none" (0 pts), "questionable" (1 pt), "definite" (2 pts).

Value

A list containing:

EGRI_Score	The calculated total score (Range 0-12).
Risk_Category	Classification (Low Risk < 4, High Risk >= 4).

References

El-Ganzouri AR, McCarthy RJ, Tuman KJ, Tanck EN, Ivankovich AD. Preoperative airway assessment: predictive value of a multivariate risk index. Anesth Analg. 1996;82(6):1197-1204. doi:10.1097/00000539-199606000-00017

Examples

# Example 1: High Risk
# Small mouth, short TMD, Mallampati 3, limited neck, heavy, prior difficulty
# Score = 1 + 2 + 1 + 1 + 1 + 2 + 2 = 10
el_ganzouri_risk_index(3.5, 5.5, 3, 85, 0, 120, "definite")

# Example 2: Low Risk
# Normal anatomy
# Score = 0
el_ganzouri_risk_index(5, 8, 1, 100, 1, 70, "none")

cliot documentation built on Dec. 1, 2025, 1:06 a.m.