Patent ID: 9333006
Filing Date: 2016-05-10
CPC Classification: A61B

Claim Text:
1. A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising: an elongate drive shaft sheath defining a sheath lumen therethrough, the drive shaft sheath being configured to be at least partially disposed within the blood vessel; a rotational atherectomy device slidable through the elongate drive shaft sheath toward stenotic lesion material in a blood vessel, comprising: an elongate flexible drive shaft including: a torque-transmitting coil defining a central lumen and a longitudinal axis, and a fluid impermeable membrane surrounding a portion of the torque-transmitting coil, the drive shaft configured for rotation about the longitudinal axis, wherein a first portion of the drive shaft is configured to be disposed within the sheath lumen while a distal portion of the drive shaft extends distally of the sheath lumen when the system is used for performing the rotational atherectomy, wherein the torque-transmitting coil is exposed along an exterior circumference of the first portion of the drive shaft while the fluid impermeable membrane surrounds the torque-transmitting coil along an exterior circumference of the distal portion of the drive shaft; an abrasive element that is fixed to the distal portion of the drive shaft such that a center of mass of the abrasive element is offset from the longitudinal axis of the drive shaft; a distal stability element that is fixed to the distal portion of the drive shaft and that has a center of mass aligned with the longitudinal axis of the drive shaft, the distal stability element being distally spaced apart from the abrasive element by a distal separation distance; and a guidewire removable from the drive shaft of the rotational atherectomy device after the drive shaft is advanced over the guidewire across the stenotic lesion material in the blood vessel.