Patent ID: 9737329
Date: 2017-08-22
CPC Classifications: A61B

Claim:
1. A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising: a flexible rotatable drive shaft including a fluid impermeable wall, the drive shaft having an elongated proximal portion and an elongated distal portion; an eccentric abrasive element mounted to the drive shaft and having a center of mass that is offset from a longitudinal axis of the drive shaft; a distal stability element fixed to the drive shaft at a location distal to the eccentric abrasive element, the distal stability element having a center of mass aligned with the longitudinal axis of the drive shaft; a first elongated drive shaft sheath configured for receiving the elongated proximal portion of the drive shaft, the first drive shaft sheath having a distal end and configured for advancement around corresponding portions of the drive shaft into a treated artery; an inflatable balloon attached to the first elongated drive shaft sheath configured to expand to engage an artery wall; and wherein the flexible rotatable drive shaft is rotatable within the drive shaft sheath while the eccentric abrasive element is positioned between the distal end of the drive shaft sheath and the distal stability element for rotating in an orbital path while the elongated distal portion of the drive shaft extends distally beyond the distal stability element; wherein the distal stability element is a distal-most stability element, and the distal portion of the drive shaft extends distally from the distal-most stability element for a length that is greater than an axial length of the stability element.