An atherectomy system for coring, ingesting and removing an obstruction material from within a patient's vessel having a flexible guide-wire defining voids for containing obstruction material and defining a diametrical envelope, a flexible rotary-catheter slidable and rotatable over the diametrical envelope...http://www.google.se/patents/US4979939?utm_source=gb-gplus-sharePatent US4979939 - Atherectomy system with a guide wire
