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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0896932 (2001-06-29) |
등록번호 | US-7338510 (2008-03-04) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 30 인용 특허 : 431 |
A strut assembly to be used in conjunction with an embolic filtering device has varying strut thicknesses, with the thickness selected based at least in part on the flexing characteristics of the particular portion of the strut assembly. The strut assembly is formed with patterns having flexing port
A strut assembly to be used in conjunction with an embolic filtering device has varying strut thicknesses, with the thickness selected based at least in part on the flexing characteristics of the particular portion of the strut assembly. The strut assembly is formed with patterns having flexing portions and stable portions, with the flexing portions contributing to the flexibility of the strut assembly during delivery and recovery in the patient's vasculature. The stable portions remain relatively unflexed and stiff when being delivered or recovered from the patient's vasculature. The stable portions provide strength and increased radiopacity to the strut assembly which is needed when the strut assembly is deployed in the body vessel. The flexing portions act much like a mechanical hinges in providing the needed flexibility to resiliently bend when being delivered through tortuous anatomy of the patient.
What is claimed is: 1. An embolic filtering device for filtering embolic debris from a patient's vasculature, comprising: a filtering assembly including an expandable strut assembly and a filter element attached thereto; wherein the strut assembly is adapted to move between a collapsed position and
What is claimed is: 1. An embolic filtering device for filtering embolic debris from a patient's vasculature, comprising: a filtering assembly including an expandable strut assembly and a filter element attached thereto; wherein the strut assembly is adapted to move between a collapsed position and an expanded position and has flexing portions which flex when subjected to bending forces when the filtering assembly is in the collapsed position and stable portions connected by flexing portions, the stable portions remaining relatively stiff when the filtering assembly is in the collapsed position while the flexing portions provide three degrees of freedom flexing between stable portions when the filtering assembly is placed in the collapsed position, wherein the stable portions include struts, each strut having a strut width and a strut thickness, and the flexing portions include struts, each strut having strut width and a strut thickness, the strut width and thickness of the struts of the flexing portions being less than the strut width and strut thickness of the stable portions. 2. The filtering device of claim 1, further including an elongated member having a proximal end and a distal end, the filtering assembly being mounted near the distal end, the elongated member being steerable to place the filtering assembly in the desired position within the patient's vasculature. 3. The filtering device of claim 1, wherein flexing portions interconnect adjacent stable portions. 4. The filtering device of claim 1, wherein the flexing portions undergo little or no deformation when subjected to bending forces developed during passage through the patient's vasculature to help maintain the shape of the expanded strut assembly once expanded. 5. The filtering device of claim 4, wherein the flexing portions of the strut assembly are made from a material which is self-expanding. 6. The filtering device of claim 1, wherein the strut assembly is made from a material which is self-expanding. 7. The filtering device of claim 6, wherein the material is nickel-titanium. 8. The filtering device of claim 6, wherein the flexing portions of the strut assembly enhance the movement of the strut assembly between the first collapsed position and the second delivery position. 9. The filtering device of claim 1, wherein the strut assembly is made from a plurality of struts, each strut having an inside surface and an outside surface which define a strut thickness, the strut thickness in the stable portions being generally greater than the strut thickness in the flexing portions of the strut assembly. 10. The filtering device of claim 9, wherein the strut thickness in the flexing portions define a nominal strut thickness and the strut thickness in the stable portions define a greater-than-nominal strut thickness. 11. The filtering device of claim 10, wherein some of the flexing portions have less than nominal strut thickness. 12. The filtering device of claim 10, wherein some flexing portions have strut thickness different from other flexing portions but less than the strut thickness in the stable portions. 13. The filtering device of claim 9, wherein each strut has a particular strut width, the strut widths in the stable portions being generally greater than the strut widths in the flexing portions. 14. The filtering device of claim 1, wherein the strut assembly is formed from a plurality of struts, each strut having a particular strut width, the strut widths in the stable portions being generally greater than the strut widths in the flexing portions of the strut assembly. 15. The filtering device of claim 14, wherein the strut widths in the flexing portions define a nominal strut width and the strut width in the stable portions define a greater-than-nominal strut width. 16. The filtering device of claim 1, wherein the flexing portions of the strut assembly enhance the movement of the strut assembly between the first collapsed position and the second delivery position. 17. An embolic filtering device for filtering embolic debris from a patient's vasculature, comprising: a filtering assembly including an expandable strut assembly and a filter element attached thereto, the strut assembly being adapted to move between a first collapsed position and an expanded position and being formed from a plurality of struts arranged to create a desired composite strut structure, each strut having an inner surface and an outer surface which defines a particular strut thickness and a strut width, wherein: portions of the composite strut assembly have strut thickness and strut width which are less than the strut thickness and strut width of the remaining struts forming the strut assembly to impart flexibility to the composite strut assembly to allow the strut assembly to resiliently flex while being delivered through the patient's vasculature. 18. The filtering device of claim 17, further including an elongated member having a proximal end and a distal end, the filtering assembly being mounted near the distal end, the elongated member being steerable to place the filtering assembly in the desired position within the patient's vasculature. 19. The filtering device of claim 17, wherein the portions of the composite strut assembly having smaller strut thickness undergo little or no deformation when subjected to bending forces developed during delivery of the filtering assembly through the patient's vasculature to help maintain the shape of the expanded strut assembly once expanded. 20. The filtering device of claim 17, wherein the portions of the composite strut assembly having smaller strut thickness enhances the movement of the strut assembly between the collapsed position and the expanded position. 21. An embolic filtering device for filtering embolic debris from a patient's vasculature, comprising: a filtering assembly including an expandable strut assembly and a filter element attached thereto, the strut assembly being adapted to move between a collapsed position and an expanded position and being formed from a plurality of struts arranged to create a desired composite strut structure, each strut having at least one flexing portion formed on the strut which exhibits more flexibility than the remaining portion of the strut, the flexing portion being located on each strut such that when the strut assembly is placed in the collapsed position the flexing portions are placed substantially adjacent to each other to create a composite flexing region on the strut assembly, wherein the strut assembly include struts, each strut having a strut width and a strut thickness, the width and thickness of the struts of the flexing portions being less than the strut width and strut thickness in the remaining portion of the strut assembly. 22. The filtering device of claim 21, wherein each strut of the strut assembly has an inside surface and an outside surface which define the strut thickness, the strut thickness in the flexing portions being generally less than the strut thickness in the remaining portion of the strut. 23. The filtering device of claim 21, wherein each strut has a particular strut width and the strut widths in the flexing portions are generally less than the strut width in the remaining portion of the strut. 24. The filtering device of claim 21, wherein each strut has a substantially uniform width and wall thickness along the length of the strut except for the flexing portions formed on each strut. 25. The filtering device of claim 21, wherein some of the struts have a plurality of flexing portions formed on the strut. 26. The filtering device of claim 25, wherein the struts having a plurality of flexing portions include at least two flexing portions having different strut widths or wall thicknesses from each other. 27. An embolic filtering device for filtering embolic debris from a patient's vasculature, comprising: a filtering assembly including an expandable strut assembly and a filter element attached thereto, the strut assembly being adapted to move between a collapsed position and an expanded position and having a longitudinal length and non-uniform mass along its longitudinal length, the strut assembly having a flexing region formed therein and a stable region forming the remaining portion of the strut assembly, the flexing region having less mass than the stable region to provide greater flexibility than the stable region of the strut assembly, the flexing region being arranged to create a hinge-like structure to allow the strut assembly to bend at the flexing region when the strut assembly is placed in the collapsed position, wherein the strut assembly is formed from a plurality of struts, each strut having a particular strut width and wall thickness, the width and wall thickness of the portion of each strut forming the flexing region of the strut assembly being less than the width and wall thickness of the struts forming the stable region. 28. The filtering device of claim 27, wherein the strut assembly has a plurality of flexing regions formed therein. 29. The filtering device of claim 27, wherein the strut assembly is formed from a plurality of struts, each strut having an area of reduced mass along the strut length which forms the flexing portion of the strut assembly.
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