"Neutral Head Position" and "Head-lift Position" for Orotracheal Intubation With "Trachway" Intubating Stylet in Adults

"Neutral Head Position" and "Head-lift Position" for Orotrachwal Intubation With "Trachway" Intubating Stylet in Adults

The purpose of this study is to investigate two different patient's head and neck positions(neutral head position and head-lift position) for the effectiveness of orotracheal intubation with using the "Clarus Video System (Trachway®)" intubating stylet.

The sniffing position has traditionally been considered the optimal head position for direct laryngoscopy, However, it may aggravate cervical spine injury. The Trachway® video stylet is an intubating device that may avoid cervical movement during intubation. Nonetheless, the effectiveness of limited neck movement in patients with neutral head or head-lift position using the Trachway® video stylet remains unclear. The purpose of this study was to compare the intubation time of the two positions with the Trachway® video stylet.

Inclusion Criteria:

• patients scheduled for various surgeries requiring general anesthesia with tracheal intubation
• American Society of Anesthesiologists(ASA) physical status classification I-III

Exclusion Criteria:

• pneumothorax
• room air saturation by pulse oximeter saturation less than 96%
• vocal cord palsy
• craniofacial anomaly
• congenital upper airway anomaly
• upper airway disease
• cervical spine pathology
• head and neck tumor status post radiotherapy
• an increased risk of regurgitation or pulmonary aspiration
• a history of difficult tracheal intubation