A device is disclosed for assisting surgical operations inside a vessel, particularly for the minimally invasive explantation and implantation of cardiac valves, comprising an operating structure adapted to be implanted within the vessel, that is adapted to be fixedly and detachably joined to the inner...http://www.google.ca/patents/US7115141?utm_source=gb-gplus-sharePatent US7115141 - Device for supporting a surgical step in a vessel, particularly for removal and implantation of heart valves
