Systems and methods for anchoring and restraining gastrointestinal prostheses

An anti-migration anchor delivery system comprising:

• a first catheter configured to facilitate the delivery of an anti-migration anchor through anatomical tissue, the anti-migration anchor being deliverable through a lumen of the catheter along a longitudinal axis;
• a second catheter extending along the first catheter;
• a hood coupled at a distal end of the first catheter, the hood including a housing that is coupled with the second catheter, the hood further including a distal end portion that is configured to support a portion of a gastrointestinal implant during delivery of the anti-migration anchor,
• a third catheter that is shape set to adopt a curvature when unconstrained, the third catheter being slidably disposed within a lumen of the second catheter such that the second catheter operates to constrain the third catheter to extend along the longitudinal axis of the second catheter when disposed within the lumen of the second catheter, and such that the third catheter can be advanced from a distal end of the second catheter to adopt the curvature;
• and
• a tissue engagement element slidably disposed within the third catheter, the tissue engagement element being configured to capture the anatomical tissue and being advanceable from a distal end of the third catheter when the third catheter adopts the curvature,
• wherein the tissue engagement element is operable to capture tissue while the gastrointestinal implant is supported by the distal end portion of the hood such that the anti-migration anchor can be delivered through the tissue and the gastrointestinal implant while the tissue is captured by the anti-migration anchor.