intubation will be accomplished at 70 bending angle and 90 degrees bending angle in each group. intubation time, success rate, additional manoeuvres and epistaxis will be recorded and compared.
Video intubating stylet can be safely and effectively used for nasotracheal intubation, but the optimal bending angle is still unknown. In this study, the optimal bending angle will be determined by comparing the intubation time and success rate of nasotracheal intubation with video intubating stylet at two different bending angles.