An expandable tissue supporting device of the present invention employs ductile hinges at selected points in the expandable device. When expansion forces are applied to the device as a whole, the ductile hinges concentrate expansion stresses and strains in small well defined areas. The expandable tissue...http://www.google.es/patents/US6527799?utm_source=gb-gplus-sharePatente US6527799 - Expandable medical device with ductile hinges
