Fig. 4From: Effects of nitroglycerin versus labetalol on peripheral perfusion during deliberate hypotension for sinus endoscopic surgery: a randomized, controlled, double-blinded trialPeripheral perfusion index. Markers are means, error bars are standard deviations. * denotes significance between both groups., † denotes significance compared to the baseline reading within nitroglycerin group, ‡ denotes significance compared to the baseline reading within labetalol groupBack to article page