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Cannula assembly having conductive cannula

  • US 5,387,196 A
  • Filed: 05/19/1992
  • Issued: 02/07/1995
  • Est. Priority Date: 05/19/1992
  • Status: Expired due to Term
First Claim
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1. A cannula assembly, which comprises:

  • a) cannula housing means having a first opening formed at a distal end thereof and second opening formed at a proximal end thereof, for receiving endoscopic instruments;

    b) cannula means for receiving the endoscopic instrument, said cannula means having a proximal end engaged with said first opening of said cannula housing means and an outer surface portion adapted to engage body tissue, wherein at least said outer surface portion of said cannula means is formed of a material having an electrical conductivity value which is at least fifty percent the conductivity value of silver so as to facilitate dissipation of electrical energy thereon through the body tissue; and

    c) tissue gripping means associated with said cannula means for securing said cannula assembly within the body tissue, said tissue gripping means having an exterior wall formed at least in part of a material having an electrical conductivity value which is at least fifty percent the conductivity value of silver, said exterior wall being configured to engage the body tissue so as to facilitate dissipation of electrical energy thereon through the body tissue.

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