Medical devices, systems and methods that are useable to facilitate transnasal insertion and positioning of guidewires and various other devices and instruments at desired locations within the ear, nose, throat, paranasal sinuses or cranium. Direct viewing of such placements via an endoscope....http://www.google.com/patents/US8146400?utm_source=gb-gplus-sharePatent US8146400 - Endoscopic methods and devices for transnasal procedures
