A rotating cutting head catheter for passage through chronic total occlusions or other refractory atherosclerotic plaque from diseased arteries is disclosed. The catheter's rotating cutting head is designed to reside safely within an outer protective sheath when not in use. The outer protective sheath...http://www.google.com/patents/US20090270888?utm_source=gb-gplus-sharePatent US20090270888 - Catheter System and Method for Boring through Blocked Vascular Passages
