Devices And Methods For Occluding Abnormal Openings In A Patient's Vasculature

A medical device having a proximal end and a distal end configured to self-expand from a contracted state when constrained within a delivery device toward an expanded state when deployed from the delivery device for delivery to a target site within the body lumen, the medical device comprising:

• a tubular structure comprising a plurality of braided strands, each braided strand comprising a proximal strand end and a distal strand end;
• a first end feature configured to receive and secure the proximal strand ends;
• and
• a second end feature configured to receive and secure the distal strand ends;
• wherein the tubular structure comprises:
• a first expanded volume portion proximate to the first end feature and at the same end of the medical device as the first end feature, the first expanded volume portion being generally disk shaped and defining a first expanded volume diameter configured to abut a wall surrounding an aperture of a left atrial appendage to prevent movement toward the second expanded volume portion and to assist in sealing the aperture;
• and
• a second expanded volume portion proximate to the second end feature and at the same end of the device as the second end feature, the second expanded volume portion being axially displaced from the first expanded volume portion, the second expanded volume portion defining a second expanded volume diameter configured to facilitate anchoring the medical device within the left atrial appendage to prevent dislodgement, the second expanded volume diameter being less than the first expanded volume diameter;
• wherein the first expanded volume portion and the second expanded volume portion are connected by a flexible connector such that the first and second expanded volume portions can articulate with respect to each other, the flexible connector having a connecting diameter narrower than the first expanded volume diameter and narrower than the second expanded volume diameter, the second expanded volume portion comprising a cone shaped end surface affixed to the flexible connector,
• wherein the medical device includes retention hooks disposed on the second expanded volume portion, so that ends of the hooks extend radially out from the second expanded volume portion and are oriented toward the first expanded volume portion.