Make an detail download ppt on DNS with Nasal septum diagram anatomy blood supply and nerve supply Causes of unilateral and bilateral nasal obstruction Signs and symptoms ,etiology pathogenesis , management including investigation - blood urine and special And medical line of treatment - drug dose routine frequency and surgical line of treatment including preop preperation, what to write in informed written consent then preop medication anesthesia then surgery name and detailed stepwise procedure including photos, and then post op case and complications in full details, prepare as much as slides and as much as details you find across from standard ENT textbook and sites