Patent ID: 9192405
Filing Date: 2015-11-24
Classification: A61B,A61M

Abstract:
1. A rotational atherectomy device for removing stenotic lesion material from a blood vessel of a patient, the device comprising: an elongate flexible drive shaft comprising an inner torque transmitting coil, the drive shaft defining a central lumen and a longitudinal axis, the drive shaft configured to rotate about the longitudinal axis; an abrasive element that is mounted to the drive shaft and extends around less than half of a circumference of the drive shaft such that a center of mass of the abrasive element is offset from the longitudinal axis of the drive shaft, wherein the abrasive element comprises an abrasive outer surface that is fixedly positioned relative to the drive shaft; a proximal stability element that is fixed to the drive shaft and that has a center of mass aligned with the longitudinal axis of the drive shaft; a distal stability element that is fixed to the drive shaft and that has a center of mass aligned with the longitudinal axis of the drive shaft; and a fluid impermeable membrane along the drive shaft and surrounding the inner torque- transmitting coil, wherein the inner torque transmitting coil and the fluid impermeable membrane each extend distally beyond the abrasive element; wherein the drive shaft further comprises an outer torque transmitting coil surrounding at least a portion of the fluid impermeable membrane.