| 摘要 |
A retrieval device (1) for retrieval of an embolic filter (2) from the vasculature (3) comprises a guide catheter (42), a retrieval catheter (10) and a centering catheter (11) which is threaded over a guidewire (25). The retrieval catheter (10) comprises an elongate flexible tube (15) including a radially expansible distal tip (19) with an open mouth (40) for retrieval of the embolic filter (2). The centering catheter (11) also comprises an elongate tube (20) which extends through the retrieval catheter tube (15) and terminates in a distal tapered end (21). The centering catheter (11) is used to center the retrieval catheter (10) in the vasculature (3) to enable the retrieval catheter (10) to freely pass through a stenosis and/or stent to retrieve the filter (2). When the retrieval catheter (10) is in position the centering catheter (11) is withdrawn through the retrieval catheter (10).
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