Treating a site within the body by, e.g., placing an endoprosthesis into the body, with a catheter having a proximal portion remaining outside the body and a shaft for positioning inside the body. The shaft includes in a distal portion a selectively expandable member which can be expanded from a small...http://www.google.es/patents/US5766201?utm_source=gb-gplus-sharePatente US5766201 - Expandable catheter
