of the stent each section has a series of triangles with each triangle defined by one distal strut connection 606 and two proximal strut connections 608 610 the ratio of the collapsed diameter to the expanded diameter of the stent is roughly 1 4 when expanded the angle u03b1 between divergent strut sections is about 45 50 degrees and the diameter of the stent is about one inch when compressed the angle u03b2 between divergent strut sections is about 5 6 degrees to reduce the diameter of the stent to about 0 21 inch for endoscopic delivery and removal the elasticity of the struts permits this compression when the radial compression is released the elasticity of the struts causes the stent to expand to diameter d the stent assumes its desired diameter as the elastic restoring forces seek their minimum stress the ends of the struts at the proximal end of the stent 600 are elongated and shaped to provide barbs 612 to anchor to the muscle in the pyloric portion of the stomach 102 fig7 is a perspective view of the stent 600 shown in fig6 when compressed the stent 600 is compressed until the angle between divergent strut sections is about 5 6 degrees to reduce the diameter d of the stent 600 to about 0 21.