Cook® Nathanson Liver Retractor Product Information Used to fully support and retract the liver during laparoscopic upper GI surgery, enabling a better view of the operating field. Supplied non-sterile. Intended for reuse. Related products Add to cart Cook® Biodesign® Anal Fistula Plug $0.00 Add to cart Cook® Medical Biodesign® for Sugarbaker Technique $0.00 Add to cart Cook® Murdoch Mechanical Arm $0.00 Add to cart KLS Martin – maXium® Electrosurgery Generator $0.00 Add to cart Lone Star Retractor System $0.00