Nasotracheal intubation (NTI) is commonly used in operations of the mouth, pharynx, larynx and also the neck .Various complications can occur such as epistaxis, bacteremia,turbinectomy, retropharyngeal dissection, and nasal alar pressure sores or necrosis.In clinical practice, nasal pressure sores caused by NTI are not uncommon, but have failed to attract clinical attention.The investigators have observed that the surgeon fixed the nasal tracheal tube and threaded tube directly to the patient's head. The investigators suspect that this method can reduce the pressure between the nasal tube and the nose.

Nasotracheal intubation (NTI) is commonly used in operations of the mouth, pharynx, larynx and also the neck .Various complications can occur such as epistaxis, bacteremia,turbinectomy, retropharyngeal dissection, and nasal alar pressure sores or necrosis.In clinical practice, nasal pressure sores caused by NTI are not uncommon, but have failed to attract clinical attention.Oral and maxillofacial surgery usually uses nasal endotracheal intubation to manage the airway. The tube fixation directly presses the skin of the patient's nose. Due to the operation, the surgeon must stand on the head of the patient and there is not enough space to place the tracheal tube bracket. Prolonged vascular compression on the nasal region may be caused by excessive tension and angulation of the nasotracheal tube against the nasal tissue.Studies have proposed the use of nasal packing, hydrocolloidal dressing and modified nasal tracheal tube to reduce the direct contact between the nasal tube and the nose, relieve the pressure between the two, so as to prevent the occurrence of alar pressure ulcers, but there is no objective data to show the degree of pressure reduction.In clinical practice, the investigatorshave observed surgeons fixed the nasal endotracheal tube and threaded the tube directly to the patient's head. The investigators suspect that this method can reduce the pressure between the nasal tube and the nose, so the investigators want to use a pressure sensor to monitor the pressure between the two.

Inclusion Criteria:

• Age between 18-60 years old
• ASA physical status I and II
• Requiring general anesthesia with nasal intubation

Exclusion Criteria:

• Previous history of pressure ulcers
• Nasal trauma or defect
• The need for emergency surgery
• Contraindications to nasal intubation
• Pregnancy

Patients who will be receiving general anesthesia with nasal intubation.