1. An endoluminal device, comprising: a flexible tubular wall defining a cavity having a first peripheral cross-sectional shape； and - a frame element having a second peripheral cross-sectional shape, different from the first peripheral cross-sectional shape, and coupled to a flexible tubular wall to provide structural support； where the flexible tubular wall is firmly attached to at least part of the frame element, and constantly biases at least at least part of the frame element when the device is in an uncompressed state, to resist deformation of the cavity from the first peripheral cross-sectional shape. 2. The endoluminal device according to claim 1, wherein the flexible tubular wall is firmly attached to at least a portion of the frame member and constantly biases at least a portion of the frame member when the device is in an uncompressed state to resist invagination of the flexible tubular wall. The endoluminal device according to claim 1, where the endoluminal device is resistant to radial deformation, which varies around the circumference of the cross section, generally perpendicular to the longitudinal axis of the cavity. The endoluminal device according to claim 3, in which the resistance to radial deformation reaches a peak as a whole in the middle part, where the flexible tubular wall is firmly attached to at least part of the frame element. The endoluminal device according to claim 4, in which the resistance to radial deformation reaches a peak in many areas around the circumference of the frame element. An endoluminal device comprising: a framework having an original,1. Эндолюминальное устройство, содержащее:- гибкую трубчатую стенку, определяющую полость, имеющую первую периферическую форму поперечного сечения； и- каркасный элемент, имеющий вторую периферическую форму поперечного сечения, отличающуюся от первой периферической формы поперечного сечения, и сцепленный с гибкой трубчатой стенкой для обеспечения структурной поддержки；где гибкая трубчатая
