Adjuvant Effect of Dexmedetomidine for the Ultrasound Guided Transversus Abdominis Plane Block in Patients Undergoing Laparascopic Cholecystectomy: a Randomized Controlled Clinical Trial.

A total of 60 adult patients American Society of Anesthesiologists physical status I,II, III were randomized to Group B (n = 30) receiving TAP block with 0.25% bupivacaine and Group D (n = 30) with 0.5 mcg/kg dexmedetomidine added to 0.25 % bupicavaine followed by general anaesthesia. Total local anaesthetic volume was standardised with 20 ml each sides of the abdomen. Hemodynamic responses to surgical incision and intraoperative fentanyl consumption were noted. Visual analog scale (VAS) scores were assessed on the emergence, at 1, 2, 3, 4, 5, 6 and 24 h. Time to first rescue analgesic (when VAS ≥4 cm or on demand), duration of postoperative analgesia, incidence of postoperative nausea-vomiting were also noted.