Airway examination component | Nonreassuring findings |
Length of upper incisors | Relatively long |
Relationship of maxillary and mandibular incisors during normal jaw closure | Prominent "overbite" (maxillary incisors anterior to mandibular incisors) |
Relationship of maxillary and mandibular incisors during voluntary protrusion of mandible* | Patient cannot bring mandibular incisors anterior to (in front of) maxillary incisors |
Interincisor distance | Less than 3 cm |
Visibility of uvula | Not visible when tongue is protruded with patient in sitting position (eg, Mallampati class >2) |
Shape of palate | Highly arched or very narrow |
Compliance of mandibular space | Stiff, indurated, occupied by mass, or non-resilient |
Thyromental distance | Less than three ordinary finger-breadths |
Length of neck | Short |
Thickness of neck | Thick |
Range of motion of head and neck | Patient cannot touch tip of chin to chest or cannot extend neck |
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