A radially expandable system for the usage in body tubes is kept, by fixation of a first part and a second part relative to each other, in a second state in which the system exhibits a larger diameter compared to a first state. The fixation of the first part relative to the second part is performed by an adhesive. With the radially expandable system a body tube, for example a vein, can be assisted in its function. The first part and the second part can be arranged on or be formed by one single wall element or two different wall elements.
