A prosthetic device to occlude an opening present in a defective atrial septum, the device having at least two clips for firmly gripping peripheral portions around the opening. The material further has a flat occluder to close the opening, and at least two fastening means for securing the clips to the...http://www.google.es/patents/US5507811?utm_source=gb-gplus-sharePatente US5507811 - Prosthetic device for atrial septal defect repair
