Attachment cuff for gastrointestinal implant

An attachment cuff, for attaching an endolumenal bypass tube within a patient's gastrointestinal system, comprising:

• a flexible, tubular body, having a proximal end and a distal end, and an axial length between the proximal end and the distal end of from about 0.5 inches to about 2.0 inches, wherein the flexible tubular body provides little or no radial support, the flexible body configured to expand and contract with the expansion and contraction of at least portions of the stomach and the esophagus, the flexible body reducing additional stress on attachment points between the cuff and adjacent tissue, the flexible body having a flow lumen therethrough having a substantially constant diameter from the proximal end of the cuff to the distal end of the cuff so as to not restrict ingested contents through the cuff;
• a first plurality of apertures near the proximal end of the tubular body, the first plurality of apertures configured to receive tissue anchor tension elements;
• and
• a coupler near the distal end of the tubular body, the coupler configured to removably receive an attachment element on the endoluminal bypass tube for connection to the endoluminal bypass tube.