Directional rotational atherectomy device with offset spinning abrasive element

摘要

A directional rotational atherectomy device for directional ablation of target tissue in an artery having a given diameter, comprising a catheter having an outer diameter less than the diameter of the artery and a lumen therethrough; a flexible elongated, rotatable drive shaft advanceable within the catheter lumen, the drive shaft comprising wire turns, a pre-curved section having a curvilinear profile and a distal section operatively connected to a bearing, the curvilinear pre-curved section further comprising at least one abrasive section operatively connected thereto and more than one axis of rotation, wherein the pre-curved section is deformable to a substantially straightened profile when received within the catheter's lumen.