A novel comprehensive model of indicators reflecting the relative spatial position of the anterior cervical structures for predicting difficult laryngoscopy in patients with cervical spondylosis
Authors' conclusion
The spatial relationship between cervical airway structures and the XU-line may serve as a novel predictive index in a comprehensive DA assessment model.
Study context
- Population
- Patients scheduled for elective cervical spondylosis surgery, Peking University Third Hospital
- Exposure
- Easy vs difficult laryngoscopy (Cormack-Lehane (C-L) grades); combined 5-factor model vs individual predictors or traditional clinical models
- Outcome
- Difficult laryngoscopy (C-L grade); multiparameter predictive model using ultrasound XU-line
Methodological detailssingle-blinded, single-centre
- Single-blinded
- Single-centre
Main finding
As reported in the abstract
Predictive performance of combined model (sex, modified Mallampati, skin-to-epiglottis distance [neutral], XU-line-to-vocal-cords distance [sniffing], XU-line to cricoid cartilage)
Sensitivity
82.0 %
Specificity
61 %
Observational data: associations, not effects.
Further findings
Independent risk factors for difficult laryngoscopy (multivariate logistic regression)
- Significant differences in clinical factors between the two groups
- 13
- Sex, modified Mallampati test, skin-to-epiglottis distance (neutral), XU-line-to-vocal-cords distance (sniffing), XU-line-to-cricoid cartilage distances independent risk factors
Original publication
A novel comprehensive model of indicators reflecting the relative spatial position of the anterior cervical structures for predicting difficult laryngoscopy in patients with cervical spondylosis. J Clin Anesth. Published 14 August 2025. doi:10.
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