Journal of anaesthesiology, clinical pharmacology
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J Anaesthesiol Clin Pharmacol · Oct 2018
Ratio of height to thyromental distance as a predictor of difficult laryngoscopy: A prospective observational study.
Various airway indices are used either singly or in combination to predict difficult laryngoscopy. Recently introduced ratio of height to thyromental distance (RHTMD) is reported to have better predictability. We aimed to assess the prediction of difficult laryngoscopy by RHTMD and compared it with other indices. ⋯ RHTMD is a single best preoperative test for predicting difficult laryngoscopy. A combination of tests has higher sensitivity and specificity with better discriminative power. Therefore indices should be used in combination in the preoperative airway assessment of adult patients.