For Nasotracheal Intubation With Video Rigid Stylet, Which Nostril is Better?

Inclusion Criteria: 1. Age ≥ 18 years; 2. American Society of Anesthesiologists physical status I\~II; 3. Scheduled to undergo elective oral and maxillofacial surgery requires nasal intubation; 4. The expected operation time \< 3 hours; 5. Extubation in operation room and do not scheduled to preventive tracheotomy; 6. Patients who were able to breathe clearly and equally through both nostrils. Exclusion Criteria: 1. Patients had history of difficult intubation or presented with an anticipated difficult airway; 2. Patients requiring nasogastric tube insertion; 3. Presence of contraindications of nasal intubation; 4. Due to surgical requirement, intubation must be completed through one nostril; 5. Presence of severe nasal obstruction,deformities of the nasal cavity, or other serious nasal diseases; 6. History of severe epistaxis or epistaxis within a month; 7. Previous history of nasal and/or laryngeal surgery; 8. Previous experience with nasal intubation; 9. History of schizophrenia, Parkinson's disease or profound dementia, or language barrier; 10. Participate in other clinical studies; 11. Refusal to sign informed consent.