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Dilating stylet and cannula

  • US 20070255282A1
  • Filed: 04/27/2006
  • Published: 11/01/2007
  • Est. Priority Date: 04/27/2006
  • Status: Active Grant
First Claim
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1. A surgical instrument set comprising:

  • a cannula having a distal end, a proximal end, a passage therethrough, and a mid-longitudinal axis, said passage at said distal end having a reduced dimension transverse to the mid-longitudinal axis less than the maximum dimension of said passage transverse to the mid-longitudinal axis, said distal end having an outer perimeter converging at an angle toward the mid-longitudinal axis of said cannula; and

    a stylet having a distal end, a proximal end, and a tapered transition portion proximate said distal end, said tapered transition portion having an angle approximating the converging angle of said outer perimeter of said distal end of said cannula, said stylet being sized and configured to be inserted into said passage of said cannula, at least a portion of said tapered transition portion and said distal end of said stylet being configured to pass through said reduced dimension of said cannula and extend beyond said distal end of said cannula.

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