A catheter including an elongate drive shaft having a proximal end and a distal end, an ablation burr disposed at the distal end which can be drawn proximally to engage with a burr deflector surface of the drive shaft in order to be displaced transversely to remove plaque....http://www.google.es/patents/US6146395?utm_source=gb-gplus-sharePatente US6146395 - Ablation burr
