ENDOSLEEVE

Medical instruments and devices comprising artificial implants, namely, gastrointestinal liners, sleeves and anchors for gastrointestinal liners, delivery systems comprising a gastrointestinal liner and an endoscopic delivery catheter, retrieval systems comprising an endoscopic grasper, a retrieval catheter and an endoscopic hood for removal of sleeves, gastrointestinal restrictor, stent, and valve to modulate gastric emptying, and kits comprised of a gastrointestinal liner, restrictor, stent and valve