Comparison of two methods for predicting difficult intubation in obstetric patients

Area of Science:

• Anesthesiology
• Obstetrics
• Airway Management

Background:

• Difficult laryngoscopy and intubation pose risks during Cesarean section under general anesthesia.
• Accurate preoperative airway assessment is crucial for patient safety.

Purpose of the Study:

• To evaluate the modified Mallampati test and Wilson risk sum score for predicting difficult laryngoscopy and intubation in obstetric patients.
• To determine the sensitivity, specificity, and predictive values of these tests, individually and combined.

Main Methods:

• A study involving 372 obstetric patients undergoing Cesarean section under general anesthesia.
• Preoperative airway assessment using the modified Mallampati test and Wilson risk sum score.
• Analysis of laryngoscopy grades and intubation difficulty.

Main Results:

• 25 patients (6.7%) had difficult laryngoscopy (Grade III/IV), and 24 (6.4%) experienced difficult tracheal intubation.
• Modified Mallampati test showed higher sensitivity (62.5%) than Wilson risk sum score (36%) for difficult intubation.
• Combining both tests improved sensitivity to 100% with a slight decrease in specificity.

Conclusions:

• The modified Mallampati test and Wilson risk sum score are valuable tools for preoperative airway assessment in obstetric patients.
• Combining these tests enhances the prediction of difficult tracheal intubation.
• These assessments should be integrated into preoperative protocols rather than used as sole predictors.