IRCT2016081310765N10 IRCT 2016-12-21 Reserch center, Tabriz University of Medical Sciences Hemodynamic changes during tracheal intubation Comparison of intubating conditions and hemodynamic changes using propofol-succinyl choline with remifentanil-propofol for tracheal intubation in patients under General Anesthesia for upper Extremity surgeries 2016-09-22 anticipated 60 Complete https://irct.ir/trial/11180 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Prevention. 1-2 Failed or difficult intubation. Intervention 1: Remifentanil will be IV injected through 5-10 seconds, then propofol 2.5 mg/kg administered through 30 seconds. After 60 seconds mask ventilation with oxygen 100% they will be intubated with suitable number of Macintosh laryngoscope (no 3) and tracheal tube laryngoscopy and endotracheal intubation was performed by another anesthesiologist. The cuff was inflated with pressure of 20-25 cmH2O. Intervention 2: Fentanil 50 µg will be IV injected then propofol 2.5 mg/kg administered through 30 seconds. Then sucsynilcoline 1 mg/kg IV will be administered after 60 seconds mask ventilation with oxygen 100% they will be intubated.