CathWorks FFRangio™ System Receives U.S. FDA Clearance. Posted on December 20, 2018 by Maranatha Kellinger - News CathWorks announced today that its FFRangio™ System received United States Food & Drug Administration (FDA) 510(k) clearance. The FFRangio system demonstrated accuracy versus the invasive FFR wire in a blinded comparative study, FAST-FFR. Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.