US Patent 8241210 Vessel retractor

A surgical apparatus includes an elongate cannula having a lumen extending therein between proximal and distal ends, a retractor disposed to slide within the lumen to extend a distal end thereof beyond the distal end of the cannula, an angling device connected to the retractor near the distal end of the retractor and extending within the cannula toward the proximal end thereof for selectively deflecting the distal end of the retractor away from a central axis of the cannula in response to manual manipulation of the angling device from near the proximal end of the cannula, wherein the distal end of the retractor is configured to move, upon extension, an object away from the central axis of the cannula.