Comparison Of Post Operative Analgesic Effectiveness Of Ropivacane Plus Dexamethasone And Ropivacane Plus Dexmedetomidine In Trans Abdominal Plane Block In Stoma Reversal Under General Anesthesia

After approval from hospital ethical committee and obtaining informed written consent from every patient, patient fulfilling the criteria of inclusion, demographic statics. Patients will be randomly allocated into two groups using a computer-generated random number table. All patients will undergo a per-operative assessment a day before surgery. They will be per-medicated with oral midazolam 0.05 mg/kg 2 h before surgery. Ultrasound machine SonoScape model S11-plus with linear probe with code L741 and frequency range of 5-10 MHz will be used for ultrasound guidance and 25G Quinkes' lumbar puncture needle will be used for administration of dose. Group I patients will receive TAP block with 20 mL 0.25% Rupivacane plus dexamethasone 4 mg at the end of surgery on surgical side. Group II patients will receive 20 mL of 0.25% ropivicaine plus dexmedetomidine 0.25ug/kg body weight at the end of surgery on surgical side. The person who will prepare the study drugs will not participate in the data collection. Anaesthesia will be induced with propofol 2-2.5 mg/kg intravenous (IV) and 0.1mg/kg intravenous (IV). Tracheal intubation will be facilitated by succinylcholine 1.5 mg/kg IV. Anaesthesia will be maintained with isoflurane 0.6 MAC, 60% nitrous oxide, 40% oxygen, atracurium 0.5mg/kg bolus followed by 0.15mg/kg maintenance dose every 30 mints until completion of surgery. Patients Intraoperative monitoring will include electrocardiogram,non-invasive blood pressure at 5 min intervals, oxygen saturation, end-tidal carbon dioxide and nasopharyngeal temperature. Patients will be ventilated by intermittent positive pressure ventilation using a circle system to maintain normocapnia. Heart rate (HR) and mean arterial pressure (MAP) will be maintained within 20% of the pre-operative value. Hypotension (MAP <20% of the baseline or <65 mmHg) will be treated with infusion of normal saline and if required injection phenylephrine boluses IV. Bradycardia (HR <50 beats/min) will be treated with IV atropine 10 µg/kg bolus in both intraoperative and post-operative period. All patients will receive paracetamol 10 mg/kg IV and ondansetron 0.1 mg/kg IV ½ hour before the completion of surgery. At the end of surgery, residual neuromuscular block will be antagonized with 0.04mg/kg of neostigmine and 0.01 mg/kg glycopyrrolate IV. Tracheal extubation will be performed on meeting the standard criteria for extubation. Patients will be shifted to post anaesthesia care unit (PACU) where resident anaesthesia doctor and trained nursing staff 11 unaware of the studied drug given to the patient will assess patients for pain using visual analogue scale (VAS, 0 score correspond to no pain and 10 score to the worst pain).The time will be noted to first request of analgesia (the time interval between the TAP block done at skin closure and the first request to analgesia at vas 4 or more).Postoperative hemodynamic will be assessed every 30mints for first 4 h then 2 hourly for next 24 hr. Inj nalbuphine 0.1mg/kg intravenously will be given on patient required basis as Rescue drug. Total opioid consumption per 24 hours in both groups in term of mg will be noted.

The incidence of postoperative complication of studied drugs will be noted i.e., Bradycardia,hypotension , Nausea and Vomiting for 24 h postoperatively. The data will be collected through structured questionnaire attached as annexure.