الفهرس 
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Abstract
The quadratus lumborum block is a novel truncal block where local anaesthetic is injected adjacent to the quadratus lumborum muscle. It is used for caesarean sections, hip arthroplasty, gynecologic surgery, colectomy, and recently nephrectomy. To date, there are no reviews that outline the efficacy and performance of the quadratus lumborum blocks in patients receiving radical cystectomy.
Based on the different injection sites, there are four types of quadratus lumborum block, namely, lateral quadratus lumborum block, posterior quadratus lumborum block, anterior (or transmuscular) quadratus lumborum block, and intramuscular quadratus lumborum block.
Multiple studies have demonstrated the quadratus lumborum block’s efficacy in reducing opioid requirement and postoperative pain to promote recovery after cesarean section, laparoscopic or laparotomy procedures, and hip surgery.
The current study was a randomized controlled clinical trial was conducted at Urology Hospital of Assiut University Hospitals. It was done in the period between 2022 and 2023. The study aimed to compare the postoperative analgesic effect of two ultrasound guided approaches of quadratus lumborum block (anterior and intramuscular) for radical cystectomy.
A total of 60 patients scheduled for radical cystectomy were randomly subdivided into two groups; QLBA group included 30 patients who received ultrasound-guided anterior approach quadratus lumborum block using 2.5 mg/kg of 0.25% bupivacaine diluted in a 20 mL of normal saline and QLBi group included 30 patients who received ultrasound-guided intramuscular quadratus lumborum using 2.5mg/kg of 0.25% bupivacaine diluted in a 20 mL syringe of normal saline, received ultrasound-guided intramuscular quadratus lumborum.