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Surgical trocar and spike assembly

  • US 5,368,607 A
  • Filed: 10/06/1992
  • Issued: 11/29/1994
  • Est. Priority Date: 02/19/1991
  • Status: Expired due to Term
First Claim
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1. A surgical trocar spike for penetration through a body wall and into a body cavity, the spike comprising:

  • a cylindrical housing including an inboard end and an outboard open end, said cylindrical housing defining an elliptical configuration terminating in a sharpened needle point at the outboard end of said cylindrical housing; and

    coring prevention means received within said cylindrical housing and biased for extension outboard-most of said needle point for urging solid materials away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said body wall; and

    means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing.

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