Preoperative airway assessment plays a key role in the context of difficult airway management. There is no general agreement that clarifies unambiguously and precisely how to conduct this assessment, and above all, which anatomical and physio logical parameters must be taken into account for its correct execution. The American Society of Anesthesiologists (ASA) recommended conducting the preoperative assessment of the airways based on 11 anatomical variables, without hierarchising the various variables for effectiveness. The ASA states that the decision to evaluate only some or all the variables depends on the clinical context. Ultimately, the assessment remains at the discretion of the individual operator [1, 2]. Furthermore, in the literature there is no single parameter that is sufficiently valid