Carag AG received investigational device exemption (IDE) approval from the U.S. FDA for its Carag Bioresorbable Septal Occluder (CBSO). The device is the first transcatheter septal occluder with a nonmetal, bioresorbable framework. The Baar, Switzerland-based company plans a "swift start" for a staged study trial in the U.S. with 250 patients, Carag's CEO Jérôme Bernhard told BioWorld.