Partial encapsulation of stents

(57) A partial enclosure type stent is made using the void cut to summary ePTFE covering material. It is arranged by the ring stent on an inner side ePTFE pipe (for example, thing supported on the mandrel), and this ring stent, It is covered with the "race-like" transplant object sleeve formed by cutting 開孔 in an ePTFE pipe so that a series of peripheral strips and direction strips of Nagate may be formed. Next, the "shape of this race" sleeve is laminated in an inner side ePTFE pipe so that a stent can be caught. By choosing the size and position of 開孔 in ePTFE covering, it is possible to maintain the important portion of a stent at the state where it does not enclose so that flexibility and extension can be promoted. You may make it a void consist of the slit cut to ePTFE covering material alternatively with this. These slits can be cut in the arbitrary directions including the direction of Nagate, a radial direction, or the shape of a diagonal. Furthermore, a slit can be separated at an interval which is different around covering material so that flexibility and extensibility can be made into the maximum. Although a single stent can be used, these approaches can use two or more ring stents of each separated along with the inner side ePTFE pipe.