European journal of anaesthesiology
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Eur J Anaesthesiol
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Airway research in anaesthesia shows that the thyromental distance (TMD) as a predictor of difficult intubation is subject to variable sensitivity and specificity. Recently, its value in this regard has been questioned with calls for a redefinition of its role. ⋯ The role of the TMD in prediction of difficult laryngoscopy should be redefined from a variable representing the SMS volume to one acting as a surrogate for inadequate head extension.