×

Circular surgical retractor

  • US 7,892,172 B2
  • Filed: 04/27/2010
  • Issued: 02/22/2011
  • Est. Priority Date: 10/14/2005
  • Status: Active Grant
First Claim
Patent Images

1. A surgical access device comprising an adjustable wound retractor comprising:

  • a flexible inner ring insertable into a body cavity;

    a substantially circular outer ring comprising;

    a longitudinal axis;

    an annular axis;

    a resilient, ring-shaped body;

    a first circumferential lumen extending through the body;

    a second circumferential lumen extending through the body, axially spaced from the first circumferential lumen;

    a first split-hoop comprising a first end and a second end disposed in the first lumen; and

    a second split-hoop comprising a first end and a second end disposed in the second lumen; and

    a flexible, tubular sleeve comprising a first end coupled to the inner ring and a second end coupled to the outer ring,whereinthe outer rings comprises two rotationally-stable resting states disposed about 180°

    apart around the annular axis;

    in the resting states, the outer ring is substantially non-compliant;

    rotating the outer ring around the annular axis winds the tubular sleeve therearound, adjusting a length of the tubular sleeve between the inner ring and the outer ring;

    rotating the outer ring around the annular axis snaps the outer ring between adjacent resting states through an intervening, rotationally-unstable transitional state; and

    in the transitional state, one of the first and second split-hoop defines the annular axis.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×