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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0414605 (2012-03-07) |
등록번호 | US-8690906 (2014-04-08) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 0 인용 특허 : 417 |
A blood clot filter is collapsible toward a longitudinal axis into a collapsed configuration for insertion into a blood vessel, and is radially expandable outwardly from the longitudinal axis to an expanded configuration for contact with the inner wall of the blood vessel at two longitudinal spaced
A blood clot filter is collapsible toward a longitudinal axis into a collapsed configuration for insertion into a blood vessel, and is radially expandable outwardly from the longitudinal axis to an expanded configuration for contact with the inner wall of the blood vessel at two longitudinal spaced locations. A first plurality of spaced, elongate arms, in the expanded configuration, curve outwardly away from the longitudinal axis toward the leading end of the filter to form a first filter basket and to center a hub at the trailing end of the filter within the vessel. 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 to form a second filter basket opening toward the leading end. The ends of these legs include hooks to bend and straighten in response to withdrawal force.
1. A filter to be placed in a flow of blood through a vessel, the vessel having a wall, the filter comprising: a hub extending along a longitudinal axis between first and second ends;a set of first members projecting from the hub second end, each of the first members including a hook spaced along th
1. A filter to be placed in a flow of blood through a vessel, the vessel having a wall, the filter comprising: a hub extending along a longitudinal axis between first and second ends;a set of first members projecting from the hub second end, each of the first members including a hook spaced along the longitudinal axis from the hub, each hook being spaced radially from the longitudinal axis a first distance, each of the first members further including a first linear segment extending substantially parallel to the longitudinal axis, a second linear segment extending tangentially with respect to the respective hook, and an intermediate linear segment extending between and obliquely coupled to the first and second segments, each of the second segments extending obliquely with respect to the longitudinal axis at a first angle, and each of the intermediate segments extending obliquely with respect to the longitudinal axis at a second angle less than the first angle; anda set of second members projecting from the hub second end and having a portion of at least one second member contiguous to a portion of at least one first member, each of the second members including a tip being spaced along the longitudinal axis from the hub, and each tip being spaced radially from the longitudinal axis a second distance less than the first distance. 2. The filter according to claim 1, wherein the first and second members project from the second hub end along a direction from the first end to the second end of the hub. 3. The filter according to claim 1, wherein each of the first members projects between a pair of the second members, and each of the second members projects between a pair of the first members. 4. The filter according to claim 1, wherein the hooks are tangent to a virtual plane orthogonal to the longitudinal axis to define a first circle having a radius equal to the first distance, and the tips are tangent to a virtual plane orthogonal to the longitudinal axis to define a second circle having a radius equal to the second distance, the first and second circles being concentric about the longitudinal axis. 5. The filter according to claim 1, wherein each of the hooks are tangent to a virtual plane orthogonal to the longitudinal axis to define a first circle having a radius equal to the first distance, and the tips are tangent to a virtual plane orthogonal to the longitudinal axis to define a second circle having a radius equal to the second distance, the first and second circles coaxial about the longitudinal axis. 6. The filter according to claim 1, wherein each hook comprises a barb configured to engage the wall of the vessel. 7. The filter according to claim 1, wherein the intermediate segments define a cone having a first apex located along the longitudinal axis proximate the hub. 8. The filter according to claim 1, wherein at least one of the arms and at least one of the legs comprise a shape memory material. 9. The filter according to claim 8, wherein the shape memory material is selected from a group consisting of plastic, superelastic metal, Titanium, stainless steel, Nitinol, Elgiloy and combinations thereof. 10. The filter according to claim 1, wherein each hook comprises a barb configured to engage the wall of the vessel. 11. The filter according to claim 10, wherein the hook comprises an arcuate profile having cross-sections along a substantial portion of the hook being less than the cross-section of each leg to permit the arcuate profile to be transformed into a generally linear profile. 12. A filter to be placed in a flow of blood through a vessel, the filter comprising: a hub disposed along a longitudinal axis between first and second ends;at least one anchor projecting from the hub second end, the at least one anchor including a hook that penetrates a wall of the blood vessel, the hook being spaced along the longitudinal axis from the hub, and spaced a first radial distance from longitudinal axis, the at least one anchor further including a first linear segment extending substantially parallel to the longitudinal axis, a second linear segment extending tangentially with respect to the respective hook, and an intermediate linear segment extend between and obliquely coupled to the first and second segments, each of the second segments extending obliquely with respect to the longitudinal axis at a first angle, and each of the intermediate segments extending obliquely with respect to the longitudinal axis at a second angle less than the first angle; andat least one locator projecting from the hub second end, the at least one locator having at least a portion proximate a tip that engages the wall of the vessel, the tip being spaced along the longitudinal axis from the hub, and spaced a second radial distance from the longitudinal axis, the second radial distance being less than the first radial distance. 13. The filter according to claim 12, wherein the at least one anchor and the at least one locator project from the second hub end along a direction from the first end to the second end of the hub. 14. The filter according to claim 12, wherein the at least one anchor comprises a plurality of anchors and the at least one locator comprises a plurality of locators, wherein each of the anchors projects between a pair of locators and wherein each of the locators projects between a pair of anchors. 15. The filter according to claim 12, wherein the hooks are tangent to a virtual plane orthogonal to the longitudinal axis to define a first circle having a radius equal to the first distance, and the tips are tangent to a virtual plane orthogonal to the longitudinal axis to define a second circle having a radius equal to the second distance, the first and second circles being concentric about the longitudinal axis. 16. The filter according to claim 12, wherein the hooks are tangent to a virtual plane orthogonal to the longitudinal axis to define a first circle having a radius equal to the first distance, and the tips are tangent to a virtual plane orthogonal to the longitudinal axis to define a second circle having a radius equal to the second distance, the first and second circles coaxial about the longitudinal axis. 17. The filter according to claim 12, wherein each hook comprises a barb configured to engage the wall of the vessel. 18. The filter according to claim 12, wherein the intermediate segments define a cone having a first apex located along the longitudinal axis proximate the hub. 19. The filter according to claim 12, wherein at least one of the arms and at least one of the legs comprise a shape memory material. 20. The filter according to claim 19, wherein the shape memory material is selected from a group consisting of plastic, super-elastic metal, Titanium, stainless steel, Nitinol, Elgiloy and combinations thereof. 21. The filter according to claim 12, wherein each hook comprises a barb configured to engage the wall of the vessel. 22. The filter according to claim 21, wherein the hook comprises an arcuate profile having cross-sections along a substantial portion of the hook being less than the cross-section of each leg to permit the arcuate profile to be transformed into a generally linear profile.
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