| 摘要 |
<p>A steerable guidewire apparatus (620) for use during percutaneous catheter interventions such as angioplasty or stent deployment. A protection element (625) comprising a filter or an occluder is mounted near the distal end of the steerable guidewire, which guides a therapeutic catheter. The guidewire comprises a hollow shaft (644) movably disposed about a core wire (642). The shaft and core wire control separation of the ends (627,629) of the protection element, causing transformation of the protection element from a deployed configuration to a collapsed configuration. Farther separation of the ends of the protection element, after it has been collapsed, causes deflection ( alpha ) in a distal region of the apparatus. <IMAGE></p> |
