Sandwich stent with spiraling bands on an outer surface
First Claim
1. A stent assembly comprising:
- a) an inner continuous stent extending along the entire length of the assembly having spaced ends;
b) a fabric cover folded over the entire inner continuous stent in a collapsed state, the cover affixed only along a single longitudinal axis outside the inner, continuous stent to at least two points along the inner continuous stent;
c) the fabric cover conforming in an outer diameter to an inner diameter of an artery in which it will be positioned and an expansible outer stent in the form of a spiraling wire around the fabric cover to secure the fabric cover to the inner continuous stent;
d) the outer stent having a lesser longitudinal length than the inner stent; and
e) an outer diameter of the inner stent being substantially equivalent to an inner diameter of the fabric cover when the inner stent is radially expanded.
1 Assignment
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Accused Products
Abstract
A stent is made generally tubular and is initially formed in a collapsed configuration. A fabric cover is provided for the inner stent and is attached outside the stent at one or more desired locations. The fabric cover is larger in diameter than the diameter of the collapsed stent, however, when the stent is expanded through activation of the balloon catheter therewithin, the stent expands to closely conform to the interior walls of the fabric cover. The securement of the fabric cover or intermediate stent layer about the inner stent is accomplished through the use of a wire spiraling externally about the outer surface of the fabric cover to secure the fabric cover or intermediate stent layer about the inner stent. When the stent sandwich is expanded, the configuration of this spiraling wire permits it to expand as well and lie against the inner walls of the blood vessel at the desired location. The stent has spaced ends, each of which may be coated or otherwise provided with a radio-opaque material.
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Citations
15 Claims
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1. A stent assembly comprising:
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a) an inner continuous stent extending along the entire length of the assembly having spaced ends;
b) a fabric cover folded over the entire inner continuous stent in a collapsed state, the cover affixed only along a single longitudinal axis outside the inner, continuous stent to at least two points along the inner continuous stent;
c) the fabric cover conforming in an outer diameter to an inner diameter of an artery in which it will be positioned and an expansible outer stent in the form of a spiraling wire around the fabric cover to secure the fabric cover to the inner continuous stent;
d) the outer stent having a lesser longitudinal length than the inner stent; and
e) an outer diameter of the inner stent being substantially equivalent to an inner diameter of the fabric cover when the inner stent is radially expanded. - View Dependent Claims (2, 3, 4, 5)
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6. A stent assembly comprising:
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a) a tubular inner continuous stent having spaced ends;
b) a fabric cover folded over the entire inner continuous stent in a collapsed state the cover affixed outside the inner stent;
c) securement means consisting of an outer spiraling wire stent over the fabric cover; and
d) the outer spiraling wire stent having a lessor longitudinal length than the tubular inner continuous stent. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification