Fig. 1From: Effects of ultrasound-guided paravertebral block on MMP-9 and postoperative pain in patients undergoing VATS lobectomy: a randomized, controlled clinical trialProtocol for patient enrolment in the study groups. Randomized controlled trial comparing PVB/GA versus GA for VATS lobectomy. PVB = paravertebral block; GA = general anesthesia; VATS = video-assisted thoracoscopic surgeryBack to article page