US Patent 8721527 Endoscopic dissector

A dissection device comprising an elongate cannula having proximal and distal ends and a central axis and arranged to receive at least a remote viewing device therein, a handle arranged to be attached to the proximal end of the elongate cannula and a dissection tip arranged to be attached to the distal end of the elongate cannula, the dissection tip comprising a curved hollow shroud that when the dissection tip is orientated for use defines a substantially concave working cavity having an open underside, the hollow shroud comprising a pair of laterally extending lateral extensions, each wing extending from an opposing lateral portion of the periphery of the hollow shroud.