Devices, delivery systems and delivery techniques for an occlusion device forthe closureof physical anomalies, such as an atrial septal defect, a patent foramen ovale(PFO), andother septal and vascular defects are described. The devices, delivery systemsand deliverytechniques relate to, but are not limited to, a patent foramen ovale (PFO)occluder madefrom a polymer tube. Specifically, a petal-shaped occluder with a catch systemis providedwithin a delivery sheath. In embodiments, the delivery system includes a firstsecurementsystem for securing a first end of the occluder and a second securement systemfor securinga second end of the occluder to a delivery catheter and a delivery wirecontained in thedelivery system. The securement systems enable the deployment (and retrieval)of thedevice and pushing and pulling of respective ends of the occluder to expandand contractthe device by varying its axial length.
