Pre-emptive Quadratus Lumborum Block for Laparoscopic Bariatric Surgery

Inclusion Criteria: Patients included in this study are * Both genders * Age between 18-50 years * Those undergoing laparoscopic bariatric surgery (as laparoscopic sleeve gastrectomy or gastric bypass). * BMI ≥ 35 Kg/m2 with comorbidity or ≥ 40 Kg/m2 without comorbidity. Exclusion Criteria: Patients excluded from this study were * those with obstructive sleep apnoea and/or Pickwickian syndrome. * if the laparoscopy procedure was converted to laparotomy. * patients suffering from known coagulation defects. * known hypersensitivity to bupivacaine, or those with contraindication to the use of NSAIDS. * Presence of sepsis at the site of injection.