×

Atherectomy devices and methods

  • US 10,639,062 B2
  • Filed: 04/06/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 04/06/2016
  • Status: Active Grant
First Claim
Patent Images

1. A rotational atherectomy device comprising:

  • an elongate flexible drive shaft comprising a torque-transmitting coil, the drive shaft defining a central lumen and a longitudinal axis;

    a combination of multiple ellipsoid eccentric abrasive elements attached to a distal portion of the drive shaft such that a center of mass of each of the multiple ellipsoid eccentric abrasive elements is offset from the longitudinal axis and each of the multiple ellipsoid eccentric abrasive elements is longitudinally spaced apart from one another, wherein the multiple ellipsoid eccentric abrasive elements comprise a distal-most eccentric abrasive element, a proximal-most eccentric abrasive element, and intermediate eccentric abrasive elements, wherein 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 intermediate eccentric abrasive elements;

    a rotatable member coupled to a proximal portion of the drive shaft such that rotation of the rotatable member rotates the drive shaft about the longitudinal axis; and

    an adjustable seal positioned proximally of the rotatable member to hinder liquid egress from a proximal end of the central lumen, the adjustable seal having a self-closing portion selectively adjustable to an open configuration in which the self-closing portion is opened to slidably receive a guidewire through the adjustable seal and to a closed configuration in which the self-closing portion is closed to block the proximal end of the central lumen.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×