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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0042424 (1993-03-26) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 480 인용 특허 : 0 |
A thrombosis filter that has an improved filtering function and can be securely anchored at a desired location and be removed through an endovenous route even after the growth of neointima. The thrombosis filter of this invention includes a first and a second filtering and holding unit, each unit in
A thrombosis filter that has an improved filtering function and can be securely anchored at a desired location and be removed through an endovenous route even after the growth of neointima. The thrombosis filter of this invention includes a first and a second filtering and holding unit, each unit including a coupling mechanism at its outer extremity in the form of a hook, and a plurality of resilient struts which include vein wall junction portions that lie parallel to the vein wall and are biased into contact therewith. The preferred embodiment includes picks that impale the vein wall to a limited depth. The units are interconnected by a core shaft which consists of a compression member and a pair of core wires.
A filter formed along a longitudinal axis, to be placed in the blood vessel of a patient for trapping clots, said filter including first and second units that are spaced from each other along the filter\s longitudinal axis, each of said units including a central hub into which a plurality of struts
A filter formed along a longitudinal axis, to be placed in the blood vessel of a patient for trapping clots, said filter including first and second units that are spaced from each other along the filter\s longitudinal axis, each of said units including a central hub into which a plurality of struts are anchored such that they radiate outwardly therefrom at an acute angle to said longitudinal axis in the direction toward the other of said units, said first and second units being interconnected by an elongated compression member extending along said longitudinal axis, each end of said compression member being connected to the central hub of one of said units, the struts of the first unit including initial portions that form a filter basket having a concave side that functions to capture clots that are flowing through the blood vessel toward the concave side of the filter basket, the struts of the first unit are bent toward the longitudinal axis at the ends of their initial portion to form vein wall junction portions that extend parallel to the vein wall and are biased into engagement therewith such that the vein wall junction portions function to anchor the filter at a desired position within the blood vessel, the struts of the second unit including initial portions that form a cone, the struts of the second unit are bent toward the longitudinally axis at the ends of their initial portion to form vein wall junction portions that extend parallel to the vein wall.
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