A medical lead and method of treating a patient are provided. The medical lead comprises an electrically insulative membrane, a resilient spring element associated with the insulative membrane, and at least one electrode associated with the insulative membrane. The spring layer is configured to urge...http://www.google.es/patents/US7177702?utm_source=gb-gplus-sharePatente US7177702 - Collapsible/expandable electrode leads
