Ultrasound Measurements of Circular Cartilage Transverse Diameter

This study with children under 1 age of elective surgery as the research subjects, according to the cross diameter, compared with the traditional method of empirical catheter model, analyze the success rate, completion time of intubation, endotracheal intubation attempts and complications, explore the clinical value of pediatric endotracheal technology, to provide new ideas and methods for clinical practice.