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Method for draining antrum

  • US 5,342,296 A
  • Filed: 11/23/1992
  • Issued: 08/30/1994
  • Est. Priority Date: 05/23/1990
  • Status: Expired due to Fees
First Claim
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1. A method for inserting a drainage means into an antrum, comprising the steps of:

  • securing the trailing end of a needle having a drainge means in a needle holder;

    slidably mounting said needle holder so that it can slide along its longitudinal axis of symmetry between a retracted position and an extended position, the distance between said retracted and extended positions being the operating travel range of said needle holder and hence of said needle;

    positioning a hammer means in spaced apart relation to a trailing end of the needle holder when the needle holder is in its retracted position;

    positioning a bias means in trailing relation to the hammer means and loading said bias means so that it urges said hammer means to strike said needle holder;

    restraining said bias means; and

    abruptly releasing said bias means so that said bias means drives said hammer means into striking engagement with said needle holder and hence said needle;

    said needle holder being abruptly displaced from its retracted position to its extended position upon being struck by said hammer means;

    whereby the operating travel range of said needle holder determines the length of travel of said needle and thus the depth of penetration of said needle and drainge means into said antrum when said needle holder is struck.

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