An ablation system comprising an atherectomy device and an aspiration catheter, each routed to a position just proximal to a lesion within a patient's vessel to ablate the lesion. The atherectomy device includes a flexible driveshaft coupled to an ablation burr. The ablation burr includes a concave front...http://www.google.de/patents/US6632230?utm_source=gb-gplus-sharePatent US6632230 - Ablation system with catheter clearing abrasive
