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Atherectomy devices and methods

  • US 10,639,064 B2
  • Filed: 11/21/2018
  • Issued: 05/05/2020
  • Est. Priority Date: 04/06/2016
  • Status: Active Grant
First Claim
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1. A method of performing a rotational atherectomy, the method comprising:

  • advancing a drive shaft of a rotation atherectomy device along a guidewire so that a set of five ellipsoid eccentric abrasive elements mounted along a distal end portion of the drive shaft is directed toward a targeted vessel, the drive shaft comprising a torque-transmitting coil extending from a handle assembly and being configured to rotate in response to rotation of a rotatable member housed within the handle assembly, the set of five ellipsoid eccentric abrasive elements comprising a distal-most eccentric abrasive element, a proximal-most eccentric abrasive element, and three intermediate eccentric abrasive elements, and both the proximal-most eccentric abrasive element and the distal-most eccentric abrasive element are smaller in maximum diameter than a maximum diameter of each of the three intermediate eccentric abrasive elements; and

    rotating the rotatable member coupled to a proximal portion of the drive shaft to drive rotation of the drive shaft about a longitudinal axis of the drive shaft.

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