SELF CENTERING CLOSURE DEVICE FOR SEPTAL OCCLUSION

摘要

The present invention provides an occluder (30) with a plurality of flexible rings (80, 82, 84) that comprises a self centering mechanism (40) to keep the occluder (30) properly centered in a defect. The self centering mechanism (40) is located between the left and right sides (34, 36) of the occluder (30). Because the occluder (30) remains properly centered, the chance that portions of the aperture will be exposed is reduced and the effectiveness of the occluder (30) is increased.