Modified Angled Tube vs. Conventional Angled Tube in Double-lumen Endotracheal Tube Intubation

Comparison of Individually Modified Angled Tube and Conventional Angled Tube in Double-lumen Endotracheal Tube Intubation: A Randomized Clinical Trial

The investigators are trying to compare the individually modified-angled tube and the conventional-angled tube in ease of double lumen endotracheal tube insertion and the incidence of related postoperative complications.

Inserting a double lumen endotracheal tube is somewhat more difficult than a single lumen tube intubation because of its larger outer diameter and the more rigid feature. Moreover, the airway axes (oral-,pharyngeal-, and laryngotracheal axis) are not always straight under sniffing condition. Therefore, to make easy to insert a double-lumen tube and reduce the tube-related complications, we are trying to compare the individually angle-modified tube and the manufacturer-provided-angled tube.

Inclusion Criteria:

• Subjects undergoing thoracic surgery under one lung ventilation
• Subjects older than 20 yrs who can give written informed consent

Exclusion Criteria:

• Those who need rapid sequence intubation
• Those with cervical spinal disease (cervical spinal injury, rheumatoid arthritis with atlantoaxial subluxation)
• Those with oropharyngeal obstructive disease (including tumor, foreign body)
• Those who are expected prolonged intubation after surgery
• Those who are pregnant