Erector Spinae Plane Block Versus Opioid Based General Anesthesia During Laparoscopic Bariatric Surgery

Inclusion Criteria: * Patient age \>18 \<60 * Obese patients 40˂ Body mass index(BMI) ˂50 * Both sexes * American Society of Anesthesiologists(ASA) physical status classes II and III * Patients scheduled for laparoscopic bariatric surgery i.e. sleeve gastrectomy and/or Roux-en-Y gastric bypass (RYGB)surgeries Exclusion Criteria: * Refusal of regional block * Patients with neurological, psychological disorders or those lacking cooperation * Patients scheduled for concomitant laparoscopic cholecystectomy or paraumbilical hernia repair or those with history of previous bariatric surgery or obstructive sleep apnea * Patients with anatomic abnormalities at site of injection, skin lesions or wounds at site of proposed needle insertion. * Patients with bleeding disorders defined as (INR \>2) and/ or (platelet count \<100,000/µL) * Patients with hepatic disease e.g. liver cell failure or hepatic malignancy or hepatic enlargement. * Patients who are allergic to amide local anesthetics. * Cases converted to open surgery will also be excluded from the study