Postoperative analgesia after FESS can be achieved through opioids, NSAIDs, topical or
infiltration of local anaesthetic and regional techniques like sphenopalatine ganglion (SPG)
block, infraorbital nerve block and nasociliary block. As the current evidences regarding the
benefit of SPG block after FESS is controversial, efficacy of sphenopalatine ganglion block
will be evaluated using bupivacaine or ropivacaine as local anaesthetic in adult patients
undergoing FESS under general anaesthesia in this study.