Fig. 5From: Comparative retrospective review of perioperative analgesia using ultrasound-guided programmed intermittent erector spinae plane block for video-assisted thoracoscopic lobectomyMeans of the plasma concentration of levobupivacaine in patients receiving continuous ESPB or intermittent ESPB depending on time change during postoperative follow-up period, respectively. *p < 0.05 significant difference was observed between two ESPB groupsBack to article page