Can Mandibular Condylar Mobility Sonography Measurements Predict Difficult Laryngoscopy?

Area of Science:

• Anesthesiology
• Medical Imaging
• Otolaryngology

Background:

• Limited mandibular condylar mobility is a key factor in difficult laryngoscopy.
• Indirect methods like mouth opening predict difficult laryngoscopy but lack direct assessment.
• Sonography offers a novel direct method to evaluate mandibular condylar mobility.

Purpose of the Study:

• To evaluate the predictive ability of sonographic assessment of mandibular condylar mobility for difficult laryngoscopy.
• To compare sonography with indirect methods for predicting difficult laryngoscopy.

Main Methods:

• Adult patients undergoing tracheal intubation for elective surgery were enrolled.
• Mandibular condylar mobility was measured using sonography (condylar translation).
• Indirect temporomandibular joint mobility assessments were also performed.

Main Results:

• Sonographic condylar translation (≤10 mm) predicted difficult laryngoscopy (Cormack-Lehane grade 3 or 4).
• Condylar translation showed a strong correlation with laryngoscopy difficulty (Spearman's ρ = -0.46).
• Sonography demonstrated superior predictive value (AUC = 0.93) compared to indirect methods.

Conclusions:

• Direct sonographic assessment of mandibular condylar mobility is a significant predictor of difficult laryngoscopy.
• Sonography offers an independent and superior alternative to indirect assessments for airway management.
• This technique enhances the prediction of challenging laryngoscopy.