A 52-year-old male patient is posted for elective abdominal surgery. During pre-anesthetic evaluation, the anesthesiologist performs Mallampati grading. Which Mallampati grade is the most common finding in the general population?

Explanation

## Mallampati Classification Overview The Mallampati score is a simple bedside test for predicting difficult intubation based on visualization of pharyngeal structures with the mouth open and tongue protruded. ### Mallampati Grades and Prevalence | Grade | Structures Visible | Prevalence in Population | Difficulty Risk | |-------|-------------------|--------------------------|------------------| | I | Soft palate, fauces, uvula, pillars | ~20-25% | Minimal | | II | Soft palate, fauces, uvula (partially) | **~60-65%** | Low | | III | Soft palate, base of uvula | ~10-15% | Moderate | | IV | Hard palate only | ~2-5% | High | **Key Point:** Mallampati Grade II is the most common finding in the general population, occurring in approximately 60–65% of healthy individuals. **High-Yield:** Grade II is considered normal and does not predict difficult intubation. Only Grade III and IV correlate with increased risk of difficult airway and failed intubation. **Clinical Pearl:** The Mallampati test must be performed with the patient sitting upright, mouth fully open, tongue fully protruded, and WITHOUT phonation. Improper positioning leads to false Grade III/IV readings. **Mnemonic:** **MIII** = Moderate risk; **MIV** = Major risk (difficult airway). Grade II is the "sweet spot" and most common. ### Limitations of Mallampati Scoring - Modest positive predictive value (~10–15%) for difficult intubation - High negative predictive value (~95%) - Should be combined with other airway assessment parameters (thyromental distance, sternomental distance, neck mobility, mouth opening) - Obesity, pregnancy, and edema can increase the grade transiently