| 摘要 |
<p>PURPOSE: To always allow a flow of fluid such as blood in a lumen such as blood vessel, and avoid stopping of the flow of the blood or the like. CONSTITUTION: In an appliance to expand a lumen such as a blood vessel, an opening 22 to expand a width of an expanding member 16 is arranged in the tubular expanding member 16, and first and second fixing members 18 and 20 are arranged in both end parts of the expanding member 16. A core member 10 to extend in the expanding member 16 is composed of shape memory alloy on which length reducing processing is performed by exhibiting a shape memory effect when a temperature rises by exceeding a prescribed value As. The expanding member 16 is connected to the core member 10 through the first fixing member 18. The first fixing member 18 is moved toward the second fixing member 20 as a length of the core member 10 is reduced by a temperature rise, and a movement of the second fixing member 20 to the first fixing member 18 is restrained, and a length of the expanding member 16 is reduced, and its width is expanded.</p> |
