An intracorporeal device, such as an endovascular graft (96), having a tubular section (97) with circumferential or helical radial support members (98). The radial support members may be inflatable channels which support the tubular structure of the graft and which are appropriately sized and longitudinally spaced to prevent or reduce kinking of the tubular structure upon bending of the tubular structure. The circumferential inflatable channels are disposed in three different longitudinal sections (99,104,108) wherein the longitudinal spacing of the circumferential inflatable channels in each longitudinal section has a predetermined value that may be chosen to match a bend radius of a patients intracorporeal conduit.
