| 摘要 |
A vena-cava filter features an inflatable balloon (10) at or near the distal end of an elongate flexible multiple-lumen core or stem (11). The balloon (10) is suitably configured in a preferred construction at or near the distal end of an elongate flexible multiple-lumen core (11). The balloon (10) is suitably configured in a preferred embodiment for femoral-vein insertional installation; and in another embodiment the balloon (10) is suitably configured for jugular-vein insertional installation. In both embodiments, the balloon (10) is deflated prior to insertion; it is inflated to become a filter when properly positioned in the vein, and finally it is deflated for removal purposes. Installation may proceed pursuant to guide-wire (13) techniques commonly used for catheter installation. Each of the indicated two embodiments is described for the case of additionally providing for injection of a tracer or a thrombolytic agent at a location (17) in the vein at proximal (i.e. upstream) offset (L1) from the region of filter action (L2).
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