Occluder medical device

A method for treating a target site including an atrial septal defect (ASD), the method comprising:

• providing a medical device having a preset, expanded configuration and a collapsed configuration, the medical device including a frame having a proximal portion and a distal portion and at least one cover, wherein the distal portion comprises a collapsible disk and the proximal portion comprises at least two wire legs, each wire leg respectively extending proximally between a distal end hingedly coupled at a hinge to a peripheral edge of the disk and a free proximal end, each wire leg folding along the hinge at the respective distal end thereof and into a crossed configuration when the device frame transitions from the collapsed configuration to the expanded configuration, and wherein at least one cover is coupled to the distal portion;
• advancing the medical device to the ASD using a delivery system including a delivery catheter and a delivery cable, while the medical device is in the collapsed configuration such that the collapsible disk is collapsed within the delivery catheter, a first wire leg of the at least two wire legs is within the delivery catheter and extends proximally from the collapsed disk and is positioned proximately to upper tissue of the ASD, and a second wire leg of the at least two wire legs is within the delivery catheter and extends proximally from the collapsed disk and is positioned proximately to lower tissue of the ASD;
• positioning the medical device relative to the ASD to occlude blood flow;
• and
• de-coupling the medical device from the delivery cable,
• wherein positioning the medical device relative to the ASD to occlude blood flow includes first transitioning the medical device to a partially deployed configuration and then transitioning the medical device to the expanded configuration,
• wherein in the partially deployed configuration, the collapsible disk is expanded outside of the delivery catheter and is positioned on a right atrial side of the ASD, while the first wire leg remains within the delivery catheter and remains positioned proximately to the upper tissue and the second wire leg remains within the delivery catheter and remains positioned proximately to the lower tissue, and
• wherein, in the expanded configuration of the medical device, the collapsible disk is expanded outside of the delivery catheter, while the first wire leg is positioned outside of the delivery catheter and engages the lower tissue on a left atrial side of the ASD, and while the second wire leg is positioned outside of the delivery catheter and engages the upper tissue on the left atrial side of the ASD.