Dexamethasone versus Dexmedetomidine as Adjuvants to Ropivacaine in Ultrasound-guided Rectus Sheath Block for Postoperative Analgesia in Patients Undergoing Exploratory Laparotomy: A Randomised Controlled Tria. - MANOHER, AKSHI; POKHRIYAL, ABHIMANYU SINGH; RAJPUT, ARTI (Journal of Clinical & Diagnostic Research, 2026)