The Effect of Bevel Direction on the Pathway of the Nasotracheal Tube

The Effect of Bevel Direction on the Pathway of the Tracheal Tube in the Nasal Cavity During Nasotracheal Intubation: a Randomized Controlled Trial

In this study, the subjects are divided into two groups (group I: intervention group = the nasotracheal tube inserted with the bevel of the nasal tube facing the direction of the patient's head, and Group II: conventional group = the bevel of the tube toward the left side of the subject). After the endotracheal tube is introduced, a flexible endoscope is used to evaluate whether the tube is located below the inferior turbinate, i.e. in the lower pathway.

Primary outcome

• incidence of tracheal tube passing through the lower pathway (beneath the inferior turbinate and immediately above the nasal floor of the nostril) Secondary outcome
• intubation time
• incidence of epistaxis
• severity of bleeding
• Resistance during Insertion of the tracheal tube

Inclusion Criteria:

• a patient who will take operation which needs nasotracheal intubation under general anesthesia

Exclusion Criteria:

• a patient who didn't agree to participate in this study
• a patient who has a deformity of the nose
• a patient who has a history of severe epistaxis
• a patient who has coagulation problem
• a patient who has a history of the fracture or surgery of the skull base