| 摘要 |
A blood clot filter which is collapsible toward a central longitudinal axis into a collapsed configuration for insertion into a blood vessel and which is radially expandable outwardly from the longitudinal axis to an expanded configuration for contac t with the inner wall of the blood vessel at two longitudinally spaced locations. A first plurality of spaced, elongate arms, in the expanded configuration of the filter, curve outwardly away from the longitudinal axis toward the trailing end of the filter to form a first filt er basket. These arms prevent movement of the filter in a first longitudinal direction. A second plurality of spaced elongate legs angle outwardly away from the longitudinal axis toward the leading edge of the filter in the expanded configuration thereof. These second legs form a secon d filter basket opening toward the leading end and prevent longitudinal movement of the filt er in a second direction opposite to the first direction.
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