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Atherectomy devices and methods

  • US 10,335,187 B2
  • Filed: 10/23/2018
  • Issued: 07/02/2019
  • Est. Priority Date: 02/23/2017
  • Status: Active Grant
First Claim
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1. A rotational atherectomy device for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the device comprising:

  • an elongate flexible drive shaft defining a longitudinal axis;

    an array of at least three spherical abrasive elements fixed to the drive shaft and spaced apart from one another by a first separation distance, the spherical abrasive elements fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis, the center of mass of a first spherical abrasive element of the spherical abrasive elements being offset from the longitudinal axis at a first radial angle, the center of mass of a second spherical abrasive element of the spherical abrasive elements being offset from the longitudinal axis at a second radial angle that differs from the first radial angle, the center of mass of a third spherical abrasive element of the spherical abrasive elements being offset from the longitudinal axis at a third radial angle that differs from the first radial angle and the second radial angle; and

    a metallic concentric abrasive element having a cylindrical shape with an abrasive exterior coating and a center of mass aligned with the longitudinal axis, the metallic concentric abrasive element fixed to the drive shaft and distally spaced apart from a distal-most spherical abrasive element of the spherical abrasive elements by a distal separation distance.

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