What is the best way to determine oropharyngeal classification and mandibular space length to predict difficult laryngoscopy?

BACKGROUND Previous studies have suggested that the degree of visibility of oropharyngeal structures (OP class) and mandibular space (MS) length can predict difficult laryngoscopy. However, those studies were either inconsistent or omit description of how to perform these tests with regard to body, head and tongue position, and the use of phonation, hyoid… (More)