Balloon Sinuplasty Technology is the name of a proprietary evice system used by physicians in the treatment of chronic sinusitis. The System is used to enlarge narrowed or blocked sinus passageways using a flexible catheter that is inflated at the narrowed or blocked opening to the sinus and then removed, allowing normal mucous flow to resume. These are less invasive tools than the tools used in the standard, conventional method, Functional Endoscopic Sinus Surgery (FESS) in which physicians use rigid instruments to cut and remove bone and tissues to enlarge the sinus passageways.