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Rotatable cutter for the lumen of a blood vesel

  • US 4,895,166 A
  • Filed: 11/23/1987
  • Issued: 01/23/1990
  • Est. Priority Date: 11/23/1987
  • Status: Expired due to Term
First Claim
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1. A rotatable cutter for excising obstructive tissue from a lumen of a blood vessel comprising:

  • a hollow cylindrical end portion;

    a hollow cylindrical tip portion coaxially aligned with and having a diameter less than that of said end portion; and

    a hollow conical portion extending integrally from said end portion to said tip portion for forming a pair of straight diametrically disposed blades with a pair of diametrically opposed openings between said blades, one of said pair of blades having a long cutting edge, and the other of said pair of blades having a short cutting edge, said long cutting edge facing in the same rotational direction as said short cutting edge, to establish alternate cutting by said long cutting edge and said short cutting edge to excise obstructive tissue from the lumen of a vessel in response to a plurality of rotations of said blades.

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