A clinical trial to study the comparison of two different nerve blocks for pain relief in patients undergoing upper abdominal surgery

INTERVENTION: Intervention1: Ultrasounded guided external oblique intercostal plane block: After induction of general anaesthesia patients in group E will receive ultrasound guided External Oblique Intercostal Plane block. With patient in supine position high frequency linear transducer will be placed in the sagittal plane between midclavicular and anterior axillary line at the level of 6th rib. After optimization of image, 8cm 22‐gauge block needle will be inserted from superomedial to inferolateral direction through the external oblique muscle. 25ml of 0.2% Ropivacaine will be deposited between the external oblique and intercostal muscle at the caudal end of the 6th rib.Time of block performance(TBP) will be observed. The TBP will be accepted as the time from the placement of the US probe on the skin to the administration of the injection and will be recorded by the anesthesia technician. Control Intervention1: Ultrasound guided subcostal transversus abdominis plane block: The US probe will be placed immediately below the costal margin in an oblique plane close to midline to identify the rectus abdominis muscle. The transversus abdominis muscle will be identified lying posterior to the rectus muscle. An 8cm 22‐gauge block needle will be inserted using an in‐ plane approach. Transversus abdominis plane will be accessed by placing the needle adjacent to costal margin but medial to linea semilunaris. The needle will be advanced slowly in‐plane to promote hydrodissection. A volume of 25ml 0.2% Ropivacaine will be injected. CONDITION: Health Condition 1: O‐ Medical and Surgical PRIMARY OUTCOME: Time to first rescue analgesic administrationTimepoint: Time to first rescue analgesic administration SECONDARY OUTCOME: Time of block performance (TBP) ; Intraoperative fentanyl consumption ; Amount of postoperative Fentanyl consumption in first 24 hours ; Postoperative pain score evaluated by NRS at 0,1,2,4, 6, 12 and 24 hrs. ; Complications ; Timepoint: 0,1,2,4, 6, 12 and 24 hrs. INCLUSION CRITERIA: ASA I â??II patients scheduled to undergo elective supra‐umbilical surgeries with unilateral incision under GA