Radiological indicators to predict the application of assistant intubation techniques for patients undergoing cervical surgery

摘要

Distance indicators on the lateral cervical X-ray in the neutral position. X1: distance between temporomandibular joint and the tip of upper incisor; X2: perpendicular distance from hard palate to the tip of upper incisor; X3: distance between temporomandibular joint and the tip of lower incisor; X4: anterior depth of mandible; X5: length of mandibular body; X6: vertical distance from the highest point of hyoid bone to mandibular body; X7: horizontal distance from the highest point of hyoid bone to the border of the nearest cervical vertebra; X8: distance from the anterior-inferior border of the fourth cervical vertebra to the anterior-superior border of the first vertebra; X9: atlanto-occipital gap; X10: distance between the spinous processes of the first and second cervical vertebra