A growing number of patients with sinusitis can be treated in the office using a small catheter and balloon to dilate the natural openings ( Osteum ) of the sinuses and promote drainage. The patients nose is first decongested and injected with local anesthesia, and using an endoscope and catheter, each individual sinus opening is identified using a tiny guidewire which slides into the sinus. A light is seen which confirms placement, and then the balloon which is 5-6 mm is inflated with saline. This widens the natural osteum atraumatically. The patient is able to go home the same day and there is no downtime.