Charles L. McIntosh,Shyam Kuppurathanam,Jeffry S. Melsheimer
申请号：
US13211409
公开号：
US20130046330A1
申请日:
2011.08.17
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A filter device assembly and a method of using such a device to capture and remove embolic material from a body lumen or blood vessel is provided. The filter device assembly generally comprises a structure having a collapsed state and an expanded state with first, second, and optionally N additional filter members circumferentially attached thereto. Each filter member forms an annulus chamber with the first filter member having porosity P1 the second filter member circumferentially having porosity P2 and the N additional filter members each having porosity [P3 . . . P(2+N)]. The magnitude of the porosity for the first, second, and N additional filter members follows the relationship P1>[P3> . . . >P(2+N)]>P2. The first, second, and N additional filter portions are configured in the expanded state to allow blood to flow there through and to capture emboli in the annulus chambers.
