Predictive value of bedside tests for difficult intubations

Area of Science:

• Anesthesiology
• Critical Care Medicine
• Emergency Medicine

Background:

• Difficult laryngoscopic intubation poses significant risks to patients.
• Accurate prediction of difficult airways is essential for patient safety and optimal procedural outcomes.
• Pre-procedural airway assessments are vital for anesthesiologists and emergency physicians.

Purpose of the Study:

• To identify the most effective pre-procedural tests for predicting difficult laryngoscopic intubation.
• To evaluate the diagnostic accuracy of various airway measurements, individually and in combination.

Main Methods:

• A prospective observational study involving 120 patients.
• Assessment of Mallampati classification, thyromental distance, sternomental distance, interincisor distance, and neck circumference.
• Correlation of these measurements with Cormack Lehane classification during laryngoscopy.

Main Results:

• No single test showed statistically significant differences between easy and difficult intubations.
• Sternomental distance exhibited the highest sensitivity (76%) and positive predictive value (54%).
• Neck circumference (≥35 cm) showed 74% sensitivity and 53% positive predictive value.

Conclusions:

• The combination of sternomental distance and neck circumference appears to be a reliable predictor of difficult laryngoscopic intubation.
• Further validation of this combined metric is warranted for clinical application.