Which finding suggests a potentially difficult airway?

• A. Mallampati II with full neck extension
• B. Mallampati I with restricted neck movement
• C. Mallampati III with limited thyromental distance
• D. Neck mobility full and thyromental distance normal

Answer: (C)

The main idea is how airway assessment findings predict difficulty with intubation. A Mallampati class reflects how much of the oropharyngeal structures you can see when the patient opens their mouth; a higher class means less visible anatomy and a potentially harder laryngoscopic view. A short thyromental distance indicates less space from the chin to the thyroid notch, suggesting limited room to displace the tongue and bring the hyoid-epiglottic complex forward during laryngoscopy. When both are unfavorable—Mallampati class III, where only the base of the uvula and soft palate are visible, and a restricted thyromental distance—the combination signals a higher likelihood of a difficult airway because both visualization and space for instrument passage are limited.

In comparison, a lower Mallampati class with full neck extension implies easier visualization, while a Mallampati I with restricted neck movement is still more favorable than a high Mallampati score with short thyromental distance. A fully mobile neck with normal thyromental distance generally indicates an easier airway as well.