Assessment of Tube Position According to the Changes of Neck Position Between Two Different Types of Nasotracheal Tubes

Exclusion Criteria

• •1. Patients under 20 years old
• •2. Patients with ASA class IV or higher
• •3. Pregnant women
• •4. Patients receiving emergency surgery
• •5. Patients who have nasal disease or who undergo nose surgery because of nasal disease
• •6. Patient with craniofacial anomaly
• •7. Patients with impaired cervical motion
• •8. Patients who can not read the consent form or are not fluent in Korean (illiterate, foreigner)
• •9. Patients who refused the clinical trial Patients with dementia or cognitive impairment