Group P2 showed a lower incidence of complications (17%) such as hemodynamic instability and inadequate sedation than Group P1.5 (55.3%, P < 0.001) or Group P2.5 (40.4%, P = 0.012).
  Group P2,5 - 2.5 mg/kg; 
  Group P2 -  the propofol dose 2 mg/kg; Group    P1.5- the propofol dose 1.5 mg/kg;
the incidence and dose of additional ephedrine