An atherectomy device is provided wherein a catheter has a cutting region including plurality of slotted tubular members interconnected by flexible segments. Each slotted tubular member includes cutting edges that sever occlusive material from the interior of a vessel when the cutting region is rotated....http://www.google.ca/patents/US6235042?utm_source=gb-gplus-sharePatent US6235042 - Atherectomy device
