| 摘要 |
PURPOSE:To obtain a stent with excellent biocompatibility, especially antithrombogenesity, and least danger of renarrowing by setting up a cover layer consisting of a porous membrane of tetra-fluoroethylene resin on outer and inner faces of a tube-shaped structure composed of an elastic wire rod. CONSTITUTION:A tube-shaped structure is formed by bending down a stainless wire rod in zigzag and placing stainless coil wires in a circle on the ring formed at each bent part. The outer and inner faces are covered with porous tetrafluoroethylene membrane 1 and 2, and a stent rod is inserted into it and spot-adhered to make a stent. This stent can prevent in vivo blood flow and cell immersional wetting. For example, the blood flow interception is attempted for necrosis and suppression of growth of cancer by inserting the stent in a blood vessel branch corresponding to the affective part in medical treatment of malignant neoplasm or cancer, or it can be used for medical treatment to block the outflow of cancer cell to prevent metastasis of cancer. |
