1. Introduction
TMQLB, paravertebral block
INFILTRATING
Ultrasound-guided transmuscular quadratus lumborum block (TMQLB), first proposed by Børglum et al. in 2013 [It has been speculated that TMQLB might produce an analgesic effect similar to that of the thoracic paravertebral block (TPVB), because a previous study on cadavers showed that the injectate injected with the TMQLB approach could spread via a pathway posterior to the arcuate ligaments and into the thoracic paravertebral space, thus infiltrating the thoracic somatic nerves and sympathetic trunk to provide both somatic and visceral analgesia [To the best of our knowledge, no prospective clinical trials have compared the analgesic effects of single-shot TMQLB and TPVB. Both TMQLB and TPVB have been reported to be effective analgesic modalities for laparoscopic urological surgeries [