Effects of Dexmedetomidine on Quality of Recovery and Analgesia After Video-assisted Thoracoscopic Surgery

Formula for administrated were randomized by computer-generated randomization. The patients and anesthesiologist, who administered and conducted all this trial, were blinded to the medication allocation. An anesthesiologist, who responsible for preparation of medication was the only person, recognized of the randomization code during trial. After one-lung ventilation, dexmedetomidine group would start the loading of dexmedetomidine (1μg/kg) during 20 minutes.

Saline placebo infusion will be adjusted the same fashion as the active comparator drug.