Apparatus and method for providing passage into body viscus

  • US 4,978,334 A
  • Filed: 09/08/1988
  • Issued: 12/18/1990
  • Est. Priority Date: 09/08/1988
  • Status: Expired due to Fees
First Claim
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1. A percutaneous non-dissection method for providing a passage into a body cavity, the method comprising the steps of:

  • locating a hollow needle and attached syringe within an elongated flexible dilator, with the needle slidably disposed through and extending out of a central bore of the dilator;

    locating the dilator and needle in coaxial relationship to the cylinder interior of a tube;

    forming a passage into the body cavity by insertion of the needle and the distal extremity of the dilator into the cavity;

    operating the syringe to withdraw air from the cavity to establish penetration of the cavity by the needle;

    slidably withdrawing the needle and syringe from the dilator;

    urging the dilator and the distal extremity of the tube into the cavity along the passage defined by the needle and the distal extremity of the dilator; and

    slidably withdrawing the dilator from the tube.

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