Mallampati score (classification of the visibility of oropharyngeal structures) should be performed in the sitting position, head in the neutral position, mouth widely open, and tongue protrudes, without phonation. However, phonation, and position modify the visibility of oropharyngeal structures and thus the Mallampati score. Furthermore, some patients cannot be evaluated in sitting position because (emergency, fractures, pain, supine position require for medical or surgical pathology...).