A post-market, randomized, intra-patient controlled, blinded multicenter study with 80 randomized subjects at up to 20 study centers.~After successful in-office bilateral balloon dilation of the frontal sinus ostium (FSO) using the VenSure™ Nav Balloon Device and Fiagon Cube Navigation System, patients will be randomized to receive one PROPEL Contour Sinus Implant on one side while the contralateral side serves as the control.
The objective of this study is to evaluate the efficacy of PROPEL Contour placement following an in-office frontal sinus balloon dilation (SBD) in patients with chronic rhinosinusitis (CRS)