Fig. 4From: Effectiveness of wound infusion of 0.2% ropivacaine by patient control analgesia pump after minithoracotomy aortic valve replacement: a randomized, double-blind, placebo-controlled trialComparison of number of episodes of NRS score higher than three in the first 48 h postoperatively between the ropivacaine group and the 0,9% saline groupBack to article page