The present invention provides an apparatus for performing angioplasty or vascular intervention procedures. The apparatus of the present invention comprises a catheter apparatus comprised of a superelastic hollow guidewire, a balloon member and a flexible tip. The superelastic hollow guidewire of the...http://www.google.co.uk/patents/US6217567?utm_source=gb-gplus-sharePatent US6217567 - Hollow medical wires and methods of constructing same
