Comparison of Different Bending Mode for Double-lumen Endotracheal Tube Intubation

Comparison of Different Bending Mode for Double-lumen Endotracheal Tube Intubation

The purpose of this study is to comparing the effects of different double-lumen endotracheal tube's bending type in tracheal intubation.

Intubation with the double-lumen endotracheal tube (DLT) remains a great challenge for anesthesiologists. Although new upper airway devices, such as GlideScope(R) videolaryngoscope, had been developed for facilitating airway management, the larger size and the complexity of DLT than single-lumen tube (SLT) makes the difficulties for DLT intubation. Therefore, the investigators designed this study to investigate the effects of different bending type of DLT in tracheal intubation.

Inclusion Criteria:

1. American Society of Anesthesiologists physical status I-III
2. more than 18 years of age
3. Receiving thoracic surgery with double-lumen endobronchial tube

Exclusion Criteria:

1. risk of regurgitation and pulmonary aspiration
2. history of gastroesophageal reflux
3. pregnancy
4. scheduled tracheostomy and postoperative prolonged ventilation in ICU
5. limited neck extension (< 35°)
6. a thyromental distance less than 7 cm
7. a sternomental distance less than 12.5 cm with the head fully extended
8. mouth can not open