Method and apparatus for thread transection of a ligament

  • US 10,022,141 B2
  • Filed: 03/31/2015
  • Issued: 07/17/2018
  • Est. Priority Date: 04/30/2012
  • Status: Active Grant
First Claim
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1. A method for transecting a soft tissue within a body, comprising the steps of:

  • providing a flexible thread-like cutting element having a smooth and non-abrasive cutting surface having an average surface roughness no greater than 50 micrometers;

    providing a hollow introducer needle configured to inject a liquid into the body and having a distal end and a proximal end;

    extending the distal end of the hollow introducer needle into the body at a first location transversely adjacent the soft tissue and out of the body at a second location transversely adjacent to the soft tissue and opposite the first location so as to traverse the soft tissue on a first side, wherein a liquid is injected by and through the hollow introducer needle into the body to separate the soft tissue and provide access for a routing path for the hollow introducer needle;

    extending the cutting element through the proximal end of the hollow introducer needle to leave the cutting element projecting proximally and distally from the hollow introducer needle;

    retracting said the hollow introducer needle from said the body so as to leave the cutting element in place;

    re-extending the distal end of the hollow introducer needle into the body at the first location and out of the body at the second location or into the body at the second location and out of the body at the first location so as to traverse the soft tissue on a second side thereof opposite the first side, wherein liquid is injected by and through the introducer needle into the body to provide space for the extension of the hollow introducer needle;

    extending the end of the cutting element at the same side with the distal end of the needle through the distal end of the hollow introducer needle such that the first end of the cutting element projects from the proximal end of the hollow introducer needle;

    retracting the hollow introducer needle from the body to thereby leave the cutting element in place looped about the soft tissue with the both ends of the cutting element extending from the same location of the body; and

    exerting force on the ends of the cutting element so as to achieve a kerf-less transection of the soft tissue by the smooth and non-abrasive cutting surface of the cutting element.

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