Optimal concentration of the transversus abdominis plane block in enhanced recovery after surgery protocols for patients of advanced age undergoing laparoscopic rectal cancer surgery

摘要

ObjectiveThe transversus abdominis plane (TAP) block ameliorates visual analogue scale scores and decreases morphine requirements, but its role remains unclear. Patients of advanced age are susceptible to local anesthetic intoxication. We aimed to identify an optimal concentration that can be used in enhanced recovery after surgery (ERAS) without compromising analgesic efficacy.