Failure to predict difficult tracheal intubation for emergency caesarean section.

Area of Science:

• Anesthesiology
• Obstetrics
• Airway Management

Background:

• Difficult tracheal intubation during emergency cesarean sections is a critical cause of maternal morbidity and mortality.
• Effective prediction of difficult airways is crucial for patient safety in obstetric anesthesia.

Purpose of the Study:

• To evaluate the effectiveness of five bedside predictors in identifying women with potential difficult tracheal intubation prior to emergency cesarean section under general anesthesia.

Main Methods:

• A prospective study included 239 women undergoing emergency cesarean section with general anesthesia.
• Five bedside airway assessments (Mallampati score, sternomental distance, thyromental distance, interincisor gap, atlantooccipital extension) were measured.
• Logistic regression analyzed predictors for difficult intubation (Cormack and Lehane grade ≥ 3).

Main Results:

• The incidence of difficult intubation was 1 in 17 women.
• Patient characteristics were not significantly associated with intubation difficulty.
• Combined predictors had low sensitivity (0.21) but high specificity (0.92) for difficult intubation.

Conclusions:

• Current bedside airway assessment tests are insufficient for reliably predicting difficult tracheal intubation in emergency cesarean sections.
• The low sensitivity of these predictors means a high percentage of difficult intubations may be missed, highlighting a significant risk.