Key result
A thyromental height ≤ 6.5 cm and neck circumference ≥ 35.5 cm demonstrated better predictive value for difficult intubation than the extended modified Mallampati grading in non-obese patients.
Why the study?
Airway management can contribute to perioperative mortality and morbidity, with difficult intubation accounting for 75-50% of cardiac arrests during general anesthesia.
Do Extended Modified Mallampati score, thyromental height, and neck circumference predict difficult intubation in patients undergoing general anesthesia?
Observational (n=130)
Single-blind
No
Do Extended Modified Mallampati score, thyromental height, and neck circumference predict difficult intubation in patients undergoing general anesthesia?
A combination of Extended Modified Mallampati grading, thyromental height, and neck circumference improves the prediction of difficult intubation compared to individual indices.
Low specificity of these airway predictors limits clinical utility; leaves open whether combining with Mallampati grading enhances prediction in prospective cohorts.
Airway management is a major concern to anesthesiologists and can contribute to perioperative mortality & morbidity if not managed in time. About 75-50% of cardiac arrests during general anesthesia are because of difficult intubation that causes inadequate oxygenation and/or ventilation. In this Prospective observational study three variable data viz. Extended Modified Mallampati score, Thyromental height & Neck circumference are obtained from every sample and their effectiveness in predicting a difficult intubation, which is calculated by a score called Intubation Difficulty Score was determined statistically. Our study shows that a combination of Extended modified Mallampati grading and Thyromental height and neck circumference is preferable for assessment of the airway because of its better Specificity and positive predictive value than taken alone. Also the ratio of neck circumference to thyromental height appears to be predicting difficult airway better than individual indices
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K et al. (2023) conducted an observational in Difficult intubation (n=130). Thyromental height and neck circumference measurement vs. Extended modified Mallampati score was evaluated on Difficult intubation defined as Intubation Difficulty Score (IDS) ≥ 5. A thyromental height ≤ 6.5 cm and neck circumference ≥ 35.5 cm demonstrated better predictive value for difficult intubation than the extended modified Mallampati grading in non-obese patients.
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