| 摘要 |
An expandable stent (10) having a covering (14) which exhibits the characteristic of upon being activated by applying an agent to the covering, dissolving to expose a portion of the underlying stent. The stent may be placed across the neck of an aneurysm to seal the aneurysm and thereafter a selected region of the covering may be dissolved by an activating agent to permit blood to flow to adjacent vessels. In one embodiment, there is discussed an aneurysm treatment device comprising: an expandable stent which takes the form of a small diameter skeletal tubular member having a thin wall, the wall of the skeletal tubular member including a plurality of cells which are formed by a plurality of interconnected strut members; and, a covering extending over a portion of the expandable stent, the covering exhibiting the characteristic of, upon being activated by applying an agent to the covering, dissolving to expose a portion of the expandable stent. |
