Expandable endovascular support device
First Claim
1. An expandable endovascular support device, comprising:
- a) a substantially tubular expandable form comprising at least one frame element having a first surface width, said tubular form having an outer periphery with a circumference, said tubular form movable from a contracted state in which said form has a first diameter to an expanded state in which said form has a second diameter greater than said first diameter; and
b) a plurality of separate thin sheet foil members having second surface widths substantially greater than said first surface width, said foil members being substantially radially coupled about said circumference of said outer periphery, said foil members being provided in a first position when said expandable form is in said contracted state,wherein when said expandable form is in said expanded state, said foil member are moved radially apart from each other about said circumference relative to said first position.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent includes a cylindrical tubular form and a plurality of foil members coupled about to the exterior of the tubular form. The foil members are spaced apart around the circumference of the tubular form to provide spaces between the segments when the stent is in an expanded state, the spaces permitting the tubular form to be contracted to a small diameter for delivery to an implant site. According to a first embodiment, the stent is self-expanding, and the tubular form is formed from a resilient wire, preferably having a plurality of longitudinal back and forth bends. According to a second embodiment, the stent is self-expanding and comprised of a plurality of tubular portions linked together, each of the portions having a plurality of foil members coupled about the circumference of the portion. According to a third embodiment, the stent is pressure expandable, and the tubular form of the stent is made from a malleable slotted tube or one or more malleable wires. The malleable tubular form has a plurality of foil members coupled about its circumference. In each embodiment, the foil members contact the wall of the blood vessel at a relatively large and flat surface which minimizes trauma at the implant location. In addition, the foil members provide additional strength to the stent.
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Citations
32 Claims
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1. An expandable endovascular support device, comprising:
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a) a substantially tubular expandable form comprising at least one frame element having a first surface width, said tubular form having an outer periphery with a circumference, said tubular form movable from a contracted state in which said form has a first diameter to an expanded state in which said form has a second diameter greater than said first diameter; and b) a plurality of separate thin sheet foil members having second surface widths substantially greater than said first surface width, said foil members being substantially radially coupled about said circumference of said outer periphery, said foil members being provided in a first position when said expandable form is in said contracted state, wherein when said expandable form is in said expanded state, said foil member are moved radially apart from each other about said circumference relative to said first position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An expandable support device for implantation within a mammalian body, said expandable support device, comprising:
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a) a self-expanding tubular form comprising at least one frame element having a first surface width, said tubular form having an outer periphery with a circumference, said tubular form movable from a contracted state in which said form has a first diameter to an expanded state in which said form has a second diameter greater than said first diameter; and b) a plurality of separate thin sheet foil members having second surface widths substantially greater than said first surface width, said foil members being substantially radially coupled about said circumference of said outer periphery, said foil members being provided in a first position when said expandable tubular form is in said contracted state, wherein when said expandable form is in said expanded state, said foil member are moved radially apart from each other about said circumference relative to said first position. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. An expandable support device for implantation within a mammalian body, said expandable support device, comprising:
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a) a pressure expandable tubular form comprising at least one frame element having a first surface width, said tubular form having an outer periphery with a circumference and an inner periphery, said tubular form movable from a contracted state in which said form has a first diameter to an expanded state in which said form has a second diameter greater than said first diameter; and b) a plurality of separate thin sheet foil members having second surface widths substantially greater than said first surface width, said foil members being substantially radially coupled about said circumference of said outer periphery, said foil members being provided in a first position when said expandable form is in said contracted state, wherein when said expandable form is in said expanded state, said foil member are moved radially apart from each other about said circumference relative to said first position. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification