Fig. 2From: Comparison of the perfusion index as an index of noxious stimulation in monitored anesthesia care of propofol/remifentanil and propofol/dexmedetomidine: a prospective, randomized, case-control, observational study PI values in post anesthesia care unit Boxes represent the medians with the 25th/75th percentiles*, P < 0.05Back to article page