Figure 8From: Transversus abdominis-plane block versus local anesthetic wound infiltration in lower abdominal surgery: a systematic review and meta-analysis of randomized controlled trials Random-effects meta-analysis of mean morphine requirement (mg) 24Â h following surgery with TAP block and LAI. LAI, local anesthetic infiltration; TAP, transversus abdominis plane; VAS, visual analog scale.Back to article page