The Rate of Successful Intubation and the Required Time for Intubation, Using Vie Scope and Macintosh Laryngoscope Will be Compared, in Order to Evaluate the Efficacy of Vie Scope in Comparison With Macintosh in Expected Easy Airways.

Macintosh laryngoscope has been the gold standard for endotracheal intubation since the middle of 20th century. During laryngoscopy and direct vision of the vocal cords, an endotracheal tube is passed into the trachea, establishing the airway.

Vie Scope is a laryngoscope, whose function is relied on Seldinger technique. Firstly, bougie is passed through the translucent barrel of Vie Scope under direct vision between the vocal cords and into the trachea. Then, Vie Scope is removed and an endotracheal tube is passed over the bougie, which will be finally removed. The inflation of the endotracheal tube's cuff is followed by ventilation and confirmation of the tube placement.