Bifurcated stent with surface area gradient
First Claim
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1. ) A stent comprising:
- a plurality of interconnected strut members defining a plurality of cells, a portion of the interconnected strut members comprising a side branch structure defining a side branch cell, the side branch cell being shaped differently than other cells of the stent;
the stent comprising a first end portion, a middle portion and a second end portion, the side branch structure located in the middle portion;
the interconnected strut members further defining a plurality of serpentine bands and a plurality of connector struts, adjacent serpentine bands connected by at least one connector strut;
a first unit area located in the middle portion, the first unit area including at least two interconnected strut members;
a second unit area located outside of the middle portion, the second unit area having a size and shape similar to the first unit area;
wherein a total outer surface area of the interconnected strut members in the first unit area is greater than a total outer surface area of the interconnected strut members in the second unit area.
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Abstract
A stent may comprise a plurality of interconnected strut members defining a plurality of serpentine bands and a plurality of connector struts. Adjacent serpentine bands may be connected by at least one connector strut. The stent may further comprise an outwardly deployable side branch structure. The total amount of surface area of structural strut members in a given unit area on the surface of the stent is higher in areas near the side branch structure than in areas spaced away from the side branch structure.
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Citations
20 Claims
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1. ) A stent comprising:
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a plurality of interconnected strut members defining a plurality of cells, a portion of the interconnected strut members comprising a side branch structure defining a side branch cell, the side branch cell being shaped differently than other cells of the stent;
the stent comprising a first end portion, a middle portion and a second end portion, the side branch structure located in the middle portion;
the interconnected strut members further defining a plurality of serpentine bands and a plurality of connector struts, adjacent serpentine bands connected by at least one connector strut;
a first unit area located in the middle portion, the first unit area including at least two interconnected strut members;
a second unit area located outside of the middle portion, the second unit area having a size and shape similar to the first unit area;
wherein a total outer surface area of the interconnected strut members in the first unit area is greater than a total outer surface area of the interconnected strut members in the second unit area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. ) The stent of paragraph 13, further comprising a fifth serpentine band connected to the second serpentine band by a third connector column comprising at least one connector strut;
- the first connector column having more connector struts than the third connector column.
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15. ) The stent of paragraph 13, further comprising a third connector column having the same number of connector struts as the second connector column, the second connector column and the third connector column located on opposite sides of the side branch structure along the length of the stent.
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16. ) The stent of paragraph 15, further comprising a fourth connector column having the same number of connector struts as the first connector column, the first connector column and the fourth connector column located on opposite sides of the side branch structure along the length of the stent.
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17. ) The stent of paragraph 13, wherein the first connector column includes a straight connector strut oriented in a first direction and the third connector column includes a straight connector strut oriented in a second direction that is different than the first direction.
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18. ) The stent of paragraph 13, wherein the second serpentine band comprises alternating straight struts and bent struts.
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19. ) The stent of paragraph 13, wherein the first connector column is located distal to the side branch structure along the length of the stent, and each connector column located distal to the first connector column includes less connector struts than the first connector column.
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20. ) A stent comprising:
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a plurality of interconnected strut members defining a plurality of cells, a portion of the interconnected strut members comprising a side branch structure defining a side branch cell, the side branch cell being shaped differently than other cells of the stent;
the stent comprising a first end portion, a middle portion and a second end portion, the side branch structure located in the middle portion;
the interconnected strut members further defining a plurality of serpentine bands and a plurality of connector struts, adjacent serpentine bands connected by at least one connector strut;
a first unit area located in the middle portion, the first unit area including at least two interconnected strut members;
a second unit area located outside of the middle portion, the second unit area having a size and shape similar to the first unit area;
wherein the first unit area includes more metal than the second unit area.
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Specification