Fig. 3From: Retrospective study of quadratus lumborum block for postoperative analgesia in patients undergoing percutaneous nephrolithotomyEffect of either type of QLB on the intraoperative sufentanil consumption (a: cumulative dosage; b: the dosage of sufentanil consumed per hour in patients undergoing PCNL). The data was presented with the median with an interquartile of range. Con: control; QLB-L: quadratus lumborum –lateral trajectory; QLB-TM: quadratus lumborum- transmuscular trajectoryBack to article page