A Clinical Trial of Cutaneous Xylocaine Spray to Reduce Intravenous Cannulation Pain in Adults

The enrolled subjects will get an intravenous cannulation in both elbows. The subject will get before xylocaine spray is placed, the intervention-arm, one intravenous cannulation in one of the elbows, the other intravenous cannulation is placed in the other arm before placebo spray is placed, the control arm. The pain score during insertion of the cannulation, the incidence of adverse events and the success rate and degree of difficulty to place an intravenous cannulation. The subjects and the one who place the cannulations will be blinded to the treatment.