Spinal Anaesthesia for Urological Surgery: A Comparison of Isobaric Solutions of Levobupivacaine and Ropivacaine with Dexmedetomidine.

Background: Subarachnoid block is used in most of urological surgeries and finding the best possible drug has always been a challenge. Bupivacaine's pure enantiomers ropivacaine and levobupivacaine have lesser systemic toxicity. Isobaric solution has extra benefit of not affecting the intrathecal dispersion of drug.