Usefulness of 0.5% Hyperbaric Bupivacaine with Dexmedetomidine on Spinal Anaesthesia in Lower Limb Orthopaedic Patients - N R Arjun; Nischala Reddy G; K. Narayana Prasad; Uthkala B Hegde (Academia Anesthesiologica International, 2020)