Occluder medical device

1 . 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.

2 . The method of claim 1 , wherein the at least one cover is coupled to the device frame along the peripheral edge of the disk such that the at least one cover expands when the medical device transitions from the collapsed configuration into the expanded configuration.

3 . The method of claim 1 , wherein the at least two wire legs rotate towards the disk during the transition from the collapsed configuration to the expanded configuration.

4 . The method of claim 1 , wherein the device frame comprises a shape-memory material.

5 . The method of claim 1 , wherein the at least one cover is formed from one or more of: a fabric material, a knit material, a polymer material, a bioresorbable material, or a bioabsorbable material.

6 . The method of claim 1 , wherein the proximal portion further comprises a connecting segment extending between respective intermediate portions of the at least two wire legs, the connecting segment oriented parallel to the disk when the at least two wire legs are in the crossed configuration.

7 . The method of claim 6 , wherein, in the expanded configuration, respective proximal portions of the at least two wire legs, extending from the connecting segment to the respective free proximal end of the corresponding wire leg, are oriented parallel to the disk.

8 . The method of claim 1 , wherein, in the expanded configuration, the respective free proximal ends of the at least two wire legs are oriented radially outwards.

9 . The method of claim 1 , wherein the first wire leg and the second wire leg have free ends extending radially 180° opposite to one another in the expanded configuration.

10 . The method of claim 1 , wherein the delivery cable is engaged with a proximal surface of the at least one cover during delivery of the medical device.

11 . The method of claim 1 , wherein the delivery cable is configured to advance the distal portion of the device frame out of the delivery catheter prior to the proximal portion of the device frame during delivery of the medical device.

12 . The method of claim 1 , wherein said advancing comprises:

engaging the delivery cable against a proximal surface of the at least one cover; and

advancing, using the delivery cable, the distal portion out of the catheter and into engagement with the left atrial side of the ASD.

13 . The method of claim 12 , wherein said advancing further comprises:

retracting the catheter to release the proximal portion of the medical device to engage the right atrial side of the ASD.