Bi-directional crimped graft
First Claim
1. A tubular graft for a body passageway comprising a longitudinally extending thin walled hollow cylinder having first and second open ends, first and second end portions adjacent said first and second open ends, respectively, and a central portion longitudinally extending between said end portions;
- the walls having circumferential crimps solely in said central portion and longitudinally extending crimps solely in said end portions;
whereby said central portion can be extended longitudinally from its relaxed position to vary the distance between the end portions and the end portions can be extended radially to vary the diameter of said end portions.
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Accused Products
Abstract
This invention relates to a graft for placement in a body passageway. The graft comprises a longitudinally extending thin walled cylinder having first and second open ends. The graft is divided into first and second axially extending end portions adjacent such open ends and an axially extending central portion therebetween. The walls of the central portion are provided with circumferential crimps and the wall of the end portions are provided with axially extending crimps whereby the central portion can be extended longitudinally to vary the distance between the end portions and the end portions may be expanded radially to vary the diameter of the end portions. In preferred embodiment the end portions have a greater diameter than the central portion imparting to the graft a somewhat dumbbell like shape preferable in employing the graft in the reduced diameter lumen of a diseased blood vessel.
460 Citations
21 Claims
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1. A tubular graft for a body passageway comprising a longitudinally extending thin walled hollow cylinder having first and second open ends, first and second end portions adjacent said first and second open ends, respectively, and a central portion longitudinally extending between said end portions;
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the walls having circumferential crimps solely in said central portion and longitudinally extending crimps solely in said end portions; whereby said central portion can be extended longitudinally from its relaxed position to vary the distance between the end portions and the end portions can be extended radially to vary the diameter of said end portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A tubular graft for a body passageway comprising longitudinally extending thin walled hollow cylinder having first and second open ends, first and second end portions adjacent said first and second open ends, respectively, and a central portion longitudinally extending between said end portions;
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the walls of said central portion having circumferential crimps and said end portions having longitudinally extending crimps, said crimps in said central and end portions each comprising a ridge and a trough defining an amplitude, a frequency, a trough diameter and a ridge diameter; the amplitude of the crimps in at least one of said end portions, in the relaxed state, ranging from about three percent to about twenty percent of the trough diameter of said crimp in said end portions and the frequency of the crimp in said end portion, in the relaxed state, ranging from about 0.3 to about 5 mm; the amplitude of the crimp in the central portion, in the relaxed state, ranging from about three percent to about twenty percent of the trough diameter of said crimp in said central portion and the frequency of the crimp in said central portion in the relaxed state ranging from about 0.3 to about 5 mm; wherein, in the relaxed state, the end portions of the graft each comprise crimps having a greater ridge diameter than the smallest ridge diameter of crimps in the central portion and wherein the ratio of said greater ridge diameter to said smallest ridge diameter ranges from about 1.4 to about 4.
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Specification