Dual blade ophthalmologic surgery device

  • US 10,888,460 B2
  • Filed: 09/25/2017
  • Issued: 01/12/2021
  • Est. Priority Date: 06/10/2003
  • Status: Active Grant
First Claim
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1. A dual blade device useable for performing an ab interno procedure within a human eye to remove a strip of trabecular meshwork tissue, said device comprising:

  • a handle configured to be grasped by an operator'"'"'s hand;

    an elongate probe shaft that extends from the handle along a longitudinal axis to a distal end;

    a tip portion that extends along a second longitudinal axis from the distal end of the probe shaft to form an angle of approximately 30 degrees to approximately 90 degrees relative to the longitudinal axis of the shaft, the tip portion being configured to penetrate through the trabecular meshwork tissue and having a transverse width, a top surface, a bottom surface and a terminal end, the transverse width of the tip portion being narrowest at its terminal end;

    first and second spaced apart cutting edges configured to simultaneously cut tissue that passes over the top surface of the protruding tip and into contact with the first and second spaced apart cutting edges; and

    a top edge that traverses above an area between the first and second spaced apart cutting edges;

    wherein;

    a) the top surface of the tip portion extends from the terminal end of the tip portion to the first and second spaced apart cutting edges;

    b) a distal portion of the probe, inclusive of the tip portion, is sized to pass through an incision formed in the eye;

    c) the tip portion is sized to fit within Schlemm'"'"'s Canal of the human eye and, when so positioned, is advanceable through Schlemm'"'"'s Canal with trabecular meshwork tissue passing over its top surface and into contact with the first and second spaced apart cutting edges;

    d) the first and second spaced apart cutting edges are formed on generally opposite edges of the distal end of the elongate probe shaft and are separated by a distance D; and

    e) the first and second spaced apart cutting edges face towards the second longitudinal axis of the tip portion.

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