El-Ganzouri Risk Index (EGRI) for Difficult AirwayLoading...Mouth opening≥ 4 cm0< 4 cm+1Thyromental distance> 6.506-6.5 cm+1< 6.0 cm+2Modified Mallampati ClassificationI (soft palate, fauces, uvula and pillars seen)0II (soft palate, fauces and uvula seen)+1III (soft palate and base of uvula seen)+2IV (soft palate not visible)+2Neck movement> 90 degrees080-90 degrees+1< 80 degrees+2Ability to prognath (advance lower jaw forward)Yes0No+1Weight< 90 kg(198.4 lbs)090-110 kg (198.4-242.5 lbs)+1> 110 kg (242.5 lbs)+2History of difficult intubationNone0Questionable+1Definite+2사용 적응증통찰 및 주의사항