| 摘要 |
<p>The endoprosthesis, e.g. for supporting or reinforcing a blood vessel, consists of a framework of at least three layers of metal filaments to form a radio-opaque core. The filaments are in the form of offset mesh layers of gold, platinum or tantalum, having a diameter no greater than 13 - 25 micrometres, and are surrounded by a radio-opaque metal such as stainless steel, Elgiloy (RTM: cobalt-chromium-nickel alloy), or nickel or titanium alloy, e.g. with a shape memory effect. The framework can be produced by co-extrusion and has no covering layer.</p> |
