A 52-year-old man with a history of type 2 diabetes mellitus and hypertension presents to the pre-anesthetic clinic for evaluation before elective laparoscopic cholecystectomy. On examination, he has a short neck, a receding mandible, and prominent upper incisors. When asked to open his mouth maximally while sitting upright, the soft palate and uvula are visible, but the fauces are not seen. What is his Mallampati score?

Explanation

## Mallampati Classification The Mallampati score is a simple bedside test used during pre-anesthetic evaluation to predict the ease of intubation. The patient is asked to sit upright, open the mouth maximally, and protrude the tongue without phonation. The examiner observes the intraoral structures visible. ### Mallampati Grades | Grade | Structures Visible | Intubation Difficulty | Incidence | |-------|-------------------|----------------------|----------| | I | Soft palate, fauces, uvula, anterior and posterior tonsillar pillars | Easy | ~80% | | II | Soft palate, fauces, uvula | Easy to moderate | ~13% | | III | Soft palate, base of uvula only | Moderate to difficult | ~5% | | IV | Hard palate only; soft palate not visible | Difficult/very difficult | ~2% | **Key Point:** In this case, the soft palate and uvula are visible but the fauces (the triangular space between the anterior and posterior tonsillar pillars) are NOT seen. This is the hallmark of **Mallampati Class III**. **High-Yield:** Mallampati Class III and IV are associated with an increased risk of difficult intubation. Class III carries a ~6-fold increased risk, and Class IV carries a ~12-fold increased risk compared to Class I. **Clinical Pearl:** Mallampati score should be assessed in all patients undergoing general anesthesia. A high Mallampati grade (III or IV) combined with other airway risk factors (short neck, receding mandible, prominent incisors, limited mouth opening, limited neck extension) warrants additional airway investigations such as thyromental distance, sternomental distance, and neck circumference. **Mnemonic - Mallampati Grades (SUPP):** - **S**oft palate + **U**vula + **P**illars + **P**alate = Class I (all visible) - Soft palate + **U**vula + **P**illars = Class II - Soft palate + **U**vula only = Class III - Hard palate only = Class IV **Warning:** Do not confuse Mallampati score with other airway assessment parameters. Thyromental distance, sternomental distance, and interincisor distance are separate measurements that also predict difficult intubation.