Low dose lignocaine + butorphanol vs. low dose bupivacaine for spinal anaesthesia in day care urological surgeries: a prospective randomized control trial.

Objective: A local anaesthetic with fast onset, short and reliable duration of anaesthesia may be preferable for day care urological surgeries. Low dose lignocaine is believed to act faster and to have a shorter duration of action than low dose bupivacaine. Use of lignocaine for spinal anesthesia is discouraged now a days because of rare reports of transient neurological symptoms.