Quadratus Lumborum Block Clinical Trial
Official title:
Comparison of Two Approaches of Quadratus Lumborum Block for Post-operative Analgesia in Radical Cystectomy: Prospective-randomized Clinical Trial
To compare the postoperative analgesic effect of two ultrasound guided approaches of quadratus lumborum block (QLB) (anterior and intramuscular) for radical cystectomy.
The quadratus lumborum block (QLB) is one of the abdominal wall block techniques used to anesthetize thoracolumbar nerves [1]. The QLB technique was described initially by Blanco et al. in 2007 (not published), then reported initially by Kadam [2] in 2013. Since then, QLB has evolved with the development of the ultrasound-guided nerve block. To date, several randomized controlled trials have reported effective postoperative analgesia, with non-intramuscular QLB for cesarean section [3,4], laparoscopic gynecologic surgery [5] and hip hemiarthroplasty [6]. At the moment, several approaches for QLB have been reported; lateral (QLB type 1) [3], posterior (QLB type 2) [3], transmuscular (anterior) [7], paramedian sagittal oblique [8], supra-iliac anterior [9], and intramuscular approaches [10]. The intramuscular QLB (QLBi) technique was first reported by [10,11] in 2016. This approach is different from others tubouchi for QLB; although the injection target sites of the other approaches are planes around the quadratus lumborum muscle, the intramuscular approach penetrates the fascia of the quadratus lumborum muscle in which local anesthetics are injected. Therefore, QLBi is relatively easier to perform compared with other QLB approaches. As there are only a few reports on QLBi in the clinical setting [10,11], its effectiveness remains controversial. Bladder cancer is an important worldwide health problem with a global estimate of 386,300 new cases and 150,200 deaths in the year 2008. The majority of bladder cancer occurs in males and there is a 14-fold variation in incidence internationally. The highest incidence rates are found in the countries of Europe, North America, and Northern Africa. Smoking and occupational exposure are the major risk factors in Western countries, while chronic infection with Schistosoma Hematobium (SH) in developing countries, particularly in Africa and the Middle East, accounts for the main total burden. (12) The incidence of urinary bladder cancer in the Middle East and Africa is greater in areas with high rather than low SH prevalence. The overall prevalence of SH infection in Egypt was 37-48% that decreased due to the antibilharzial campaign to 3%. The urinary bladder cancer previously accounted for about 31% of the total incidence of cancers in Egypt that subsequently decreased to 12 %.(13) Radical cystectomy has traditionally been considered the standard of therapy for high-grade invasive bladder cancer, with the best survival results and lowest local recurrence rates reported to date . Radical cystectomy provides the optimum result for accurate pathological staging, prevention of local recurrence and overall survival ]. In addition, radical cystectomy may influence the decision for adjuvant chemotherapy based upon clear pathological criteria ;
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