Patent ID: 8551128
Filing Date: 2013-10-08
Classification: A61B

Abstract:
1. A high-speed rotational atherectomy device for opening a stenosis in an artery having a given diameter, comprising: a guide wire having a maximum diameter less than the diameter of the artery; a flexible elongated, rotatable drive shaft advanceable over the guide wire the drive shaft comprising a rotational axis and a resting diameter corresponding with a deformed substantially straightened drive shaft, wire turns and a pre-curved section comprising: a substantially curvilinear profile comprising a single transverse offset of the pre-curved section away from the drive shaft's rotational axis when the drive shaft is not advanced over the guide wire, the single transverse offset having a height and a length, a swept diameter achieved during high-speed rotation of the drive shaft which is larger than the resting diameter, and a deformed and substantially straightened linear profile without the single transverse offset when the drive shaft is advanced over the guide wire; and an eccentric abrading crown attached to the drive shaft at the pre-curved section, the eccentric abrading crown comprising proximal, intermediate and distal portions, wherein the proximal portion comprises a proximal outer surface, the intermediate portion comprises an intermediate outer surface and the distal portion comprises a distal outer surface, the proximal outer surface having diameters that increase distally, the distal outer surface having diameters that decrease distally, and the intermediate outer surface being cylindrical, wherein at least the intermediate outer surface comprise tissue removal sections and wherein the eccentric abrading crown defines a drive shaft lumen therethrough and a hollow cavity, the drive shaft at least partially traversing the drive shaft lumen, the eccentric abrading crown further comprising a center of mass that is radially offset from the rotational axis of the drive shaft when the drive shaft comprises the deformed substantially linear profile.