The present application describes an implant system useable for
positioning an implant device such as a device useful for restricting
passage of ingested food into the stomach. In one embodiment, the
disclosed system includes a plurality of anchors that may be coupled to
tissue within the stomach, or to a tissue tunnel formed by plicating
stomach wall tissue. The anchor includes a loop. During use, the implant
device is inserted through the loop and expanded such that it retains its
position within the loop until removed. Instruments for implanting and
explanting the implant device are also described.