Medical devices, 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 and endoscopic hood for removal of sleeves [, gastrointestinal resistors, gastrointestinal liner and resistor combinations ]

Medical devices and surgical instruments for use in diagnosis and surgery of the gastrointestinal tract, 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 and endoscopic hood for removal of sleeves