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Methods and devices for cutting and abrading tissue

  • US 10,555,753 B2
  • Filed: 05/19/2017
  • Issued: 02/11/2020
  • Est. Priority Date: 04/29/2009
  • Status: Active Grant
First Claim
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1. An atherectomy catheter, comprising:

  • a rotatable shaft having proximal and distal ends and a longitudinal axis extending between the proximal and distal ends, wherein the rotatable shaft is selectively rotatable about its longitudinal axis; and

    a tissue-removing element adjacent the distal end of the rotatable shaft, the tissue-removing element having a length and an outer diameter, the tissue-removing element being coupled to the rotatable shaft for rotating the tissue-removing element about a longitudinal axis of the tissue-removing element, the tissue-removing element havinga first abrasive surface on a first longitudinal portion of the outer diameter surface of the tissue-removing element configured for abrading tissue as the tissue-removing element rotates,a second abrasive surface on a second longitudinal portion of the outer diameter surface of the tissue-removing element configured for abrading tissue as the tissue-removing element rotates, anda non-abrasive surface on a third longitudinal portion of the outer surface of the tissue-removing element disposed longitudinally between the first and second abrasive surfaces;

    wherein each of the first abrasive surface, the second abrasive surface, and the non-abrasive surface is annular and extends about the longitudinal axis.

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