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Clear view cannula

  • US 20050085771A1
  • Filed: 11/09/2004
  • Published: 04/21/2005
  • Est. Priority Date: 04/16/1999
  • Status: Abandoned Application
First Claim
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1. A clear view cannula comprising:

  • (a) a tubular body having a proximate end and a distal end;

    (b) screwing threads on the outer surface and extending parallel to the longitudinal axis of said tubular body intermediate said proximate end and said distal end;

    (c) a cylindrical sleeve having a proximate end and a distal end concentrically mounted about and slidably secured to said tubular body;

    (d) engaging means at the proximate end of said cylindrical sleeve to engage said screwing threads; and

    , (e) a plurality of spaced apart shield members circumferentially disposed about and longitudinally co-extensive with said tubular body secured to the distal end of said cylindrical sleeve such that when said cylindrical sleeve is slidably urged along said tubular body toward the distal end of said tubular body, said shield members are caused to expand and fully deploy enabling said shield members to retract and retain torn or fragmented tissue within an anatomical cavity and anchor said clear view cannula within said cavity with a minimum of penetration of said cannula into said cavity.

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