Asymmetric occluder device
An asymmetric occlusion device for occluding an opening in a body tissue where part of the opening is defined by a partial inadequate rim. The asymmetric occlusion device includes a waist portion having a distal end extending to a proximal end. The waist portion is of non-woven material extending around a longitudinal axis opening. The occlusion device further includes a pair of asymmetric occluder disks attached to the waist. The asymmetric distal and proximal occluder disks are formed of shape memory material. The asymmetric occluder disks include a short arm extending from the waist and an extended arm extending from the waist. The extended arm exceeds the length of the first short arm. The density of the first short arm exceeds the density of the second extended arm.
1. A method of occluding a septal defect in a septum comprising:
inserting a delivery catheter containing a septal occluder through the septal defect releasably attached to a hub in which wire ends of a braiding are gathered, said braiding forming a first disk and a second disk of said septal occluder, said first disk and said second disk joined together by a waist, and said hub is off-center of said waist, thereby creating a narrow portion on one side of the hub and a wide portion on an opposite side of the hub;
expanding said first disk from a distal end of the catheter on a distal side of the septum;
expanding said second disk from the distal end of the catheter on a proximal side of the septum, thereby squeezing the septum between the first disk and the second disk;
wherein said off-center hub causes said delivery catheter to become displaced laterally from said septal defect prior to release;
releasing said occluder from said delivery catheter by detaching from the catheter said hub.
2. The method of claim 1 further comprising providing an additional magnetic force between the first disk and the second disk.
3. The method of claim 1 wherein releasing the occluder comprises unthreading a snare wire that is threaded through an opening through the hub.
4. The method of claim 1 wherein expanding said second disk from the distal end of the catheter on a proximal side of the septum, thereby squeezing the septum between the first disk and the second disk comprises providing a torsional rotation of the first and second disk.