A graftless prosthetic stent for treatment of vascular lesions such as aneurysms and arterio-venous fistulas, especially in neurovascular vessels, comprises a continuous helical ribbon formed of a shape-retaining metal having a transition temperature at which the stent expands from its contracted condition...http://www.google.es/patents/US7520893?utm_source=gb-gplus-sharePatente US7520893 - Method for treating neurovascular aneurysms
