US Patent 11058459 Two-piece cutting guard with evacuation ports

A tissue guard for insertion within an access device disposed within an operating cavity includes a base section defining open proximal and distal ends and a lumen extending therethrough between the open proximal end and the open distal end. The base section includes one or more openings in a side thereof in fluid communication with the lumen. The proximal end of the base section includes an evacuation ring in fluid communication with the lumen. A tissue cuff is configured to encapsulate the base section and is selectively moveable between a distal position for facilitating insertion of the tissue guard within an access device disposed within a tissue opening in an operating cavity and a proximal position wherein the tissue cuff encloses the one or more openings to form an evacuation channel between the one or more openings and the evacuation ring to facilitate fluid evacuation from the operating cavity.