Patent ID: 11931062
Assignee: CARDIO FLOW, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. A rotational atherectomy device, comprising:
an elongate flexible drive shaft defining a longitudinal axis and comprising a torque-transmitting coil helically wound around the longitudinal axis in a first spiral direction extending toward a distal end of the elongate flexible drive shaft; and
a spiraled set of three or more abrasive spheres fixedly mounted to the torque-transmitting coil such that each of the abrasive spheres has a center of mass offset from the longitudinal axis of the drive shaft at a radial angle different from each adjacent abrasive sphere of the spiraled set to thereby define a spiral path in which the centers of mass of the abrasive spheres around the longitudinal axis in a second spiral direction extending toward the distal end that is opposite of the first spiral direction;
an abrasive-coated metallic concentric element fixedly mounted to the torque-transmitting coil at a position distally spaced apart from a distal-most abrasive sphere of the spiraled set such that a center of mass of the abrasive-coated metallic concentric element is aligned with the longitudinal axis while each abrasive sphere in the spiraled set has its respective center of mass offset from the longitudinal axis; and
a concentric tip member affixed to and extending distally from a distal-most end of the torque-transmitting coil such that the abrasive-coated metallic concentric element is positioned between the concentric tip member and the distal-most abrasive sphere of the spiraled set.