Effect of Different Nasotracheal Tubes on Tube Passage

Comparison of the Effect of Tube Type and Intubation Technique on Nasopharyngeal Passage During Nasotracheal Intubation

The purpose of the study is to find out the clinical effects that can be obtained during nasotracheal intubation when using velvet-soft PVC tube compared to conventional polyvinylchloride(=PVC) tube.

The hypothesis of this study is that the velvet-soft PVC tube can advanced from the nasal cavity to the oral cavity through the posterior wall of the pharynx more smoothly than conventional PVC tube, thus reducing blockade of tube advancement, nasal/pharyngeal mucosal bleeding, and intubation time. In addition, investigators would like to compare the technique of nasal intubation using by connecting rubber suction catheter to PVC tube tip.

Inclusion Criteria:

• The patients who need to nasotracheal intubation for surgery
• age: 19 years old or more

Exclusion Criteria:

• patient refusal
• nasal deformity
• history of previous moderate degree of epistaxis