Cervical discectomy instruments

  • US 5,472,426 A
  • Filed: 08/17/1993
  • Issued: 12/05/1995
  • Est. Priority Date: 09/12/1991
  • Status: Expired due to Term
First Claim
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1. A method of dilating an incision, comprising the steps of:

  • inserting a stylet having an inner bore and an outer barrel through said incision and withdrawing said inner bore;

    providing a first tube of cylindrical construction having a first predetermined length and a first predetermined diameter;

    providing a second tube of cylindrical construction having a second predetermined length greater than said first predetermined length and a second predetermined diameter less than said first predetermined diameter but greater than an outer diameter of said outer barrel so that said first tube telescopically receives said second tube and so that said second tube telescopically receives said outer barrel;

    tapering a leading end of said second tube so that said leading end is easily slid into a ligament without imparting trauma to the ligament;

    dilating an incision a first amount by inserting the tapered leading end of the second tube through said incision;

    dilating said incision further by inserting the leading end of the first tube thereinto, said insertion being accomplished by sliding said first tube toward the incision over said second tube until the leading end of the first tube is flush with the leading end of the second tube, said second tube serving to guide the first tube to the incision; and

    withdrawing said second tube from the inner bore of said first tube and leaving said first tube in the incision so that subsequent surgical instruments may be introduced to a surgical site through the inner bore of said first tube.

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