| 摘要 |
A guidewire device and methods for containing and removing embolic materials from within a vascular system. The guidewire provides a very low profile expandable structure that can be carried at the distal end of any guidewire used in an endovascular intervention. The structure can be expanded at a location distal to a targeted treatment site, and due to its very low profile when non-expanded, can be passed through any narrow and tortuous occluded vessels that can accommodate a guidewire. The expandable structure comprises a thin film filter portion coupled to at least one support portion for supporting the filter portion in an expanded state. The support portion in its first non-extended state comprises at least one tensioned nitinol member constrained by an electrolytic sacrificial weld. The guidewire is coupled to a remote electrical source and controller for causing electrolysis of the sacrificial component of the invention.
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