An angioplasty catheter has an elongated body with at least one lumen extending therethrough. A tip, constructed of materials softer than the elongated body is attached to the distal end of the body. The tip segment has at least one lumen passing therethrough which is in alignment withthe lumen in the...http://www.google.se/patents/US4921483?utm_source=gb-gplus-sharePatent US4921483 - Angioplasty catheter
