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Method and apparatus for insertion of a cannula and trocar

  • US 5,746,720 A
  • Filed: 12/18/1995
  • Issued: 05/05/1998
  • Est. Priority Date: 10/18/1995
  • Status: Expired due to Fees
First Claim
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1. A method for inserting a cannula through a body cavity wall and into a body cavity, comprising the steps of:

  • (a) providing an insufflation needle;

    (b) providing a guiding cannula;

    (c) providing a hollow dilator;

    (d providing a second cannula;

    (e) inserting the insufflation needle through the body cavity wall such that a distal end of the insufflation needle extends into the body cavity;

    flowing gas through the insufflation needle and into the body cavity in order to insufflate the body cavity;

    (g) inserting the guiding cannula over the insufflation needle and through the body cavity wall such that a distal end of the guiding cannula extends into the body cavity wherein inserting the guiding cannula causes the guiding cannula to block the flow of gas through the insufflation needle; and

    (h) inserting the hollow dilator sleeved within the second cannula through the body cavity wall over the guiding cannula, such that a distal end of the dilator and a distal end of the second cannula extend into the body cavity.

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