Membrane for covering a peripheral surface of a stent
First Claim
1. A membrane for covering a peripheral surface of an expandable stent configured to be received in a blood vessel, the membrane comprising a single layer having a plurality of line openings formed therein, each line opening comprising a slit or a flap and being configured for:
- allowing, in an open state when covering the expanded stent in the blood vessel, blood from outside a lumen of the stent to flow inside the lumen and then out of respective gaps of the plurality of line openings into a branch area of the blood vessel,at least substantially closing the gaps in a closed state when the membrane covers the stent and the stent is expanded to the wall of the blood vessel, andchanging from the closed state to the open state by expanding outwardly away from the expanded stent in response to blood flow in the lumen when the stent is expanded and resides at the branch area within the blood vessel.
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Accused Products
Abstract
A membrane for covering a peripheral surface of a stent is provided, the membrane including a plurality of line openings formed therein. Each line opening may be a straight line opening, for example in the form of a slit, a curved line opening, or any line opening of a suitable shape or curvature, e.g. U-shaped or V-shaped. Blood pressure opens the slits to allow blood to flow through the membrane, while curved line openings create a flap in the membrane that can open to allow blood to pass through. According to further embodiments of the present invention, a method of forming a membrane on a stent and a device for use in a blood vessel are provided.
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Citations
15 Claims
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1. A membrane for covering a peripheral surface of an expandable stent configured to be received in a blood vessel, the membrane comprising a single layer having a plurality of line openings formed therein, each line opening comprising a slit or a flap and being configured for:
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allowing, in an open state when covering the expanded stent in the blood vessel, blood from outside a lumen of the stent to flow inside the lumen and then out of respective gaps of the plurality of line openings into a branch area of the blood vessel, at least substantially closing the gaps in a closed state when the membrane covers the stent and the stent is expanded to the wall of the blood vessel, and changing from the closed state to the open state by expanding outwardly away from the expanded stent in response to blood flow in the lumen when the stent is expanded and resides at the branch area within the blood vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for use in a blood vessel, the device comprising:
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a stent configured to be received in the blood vessel, the stent comprising a luminal passage for flow of blood in the blood vessel when the stent is received in the blood vessel; and a membrane configured to cover a peripheral surface of the stent, wherein the membrane comprises a single layer having a plurality of line openings formed therein, each line opening comprising a slit or flap and being configured for; allowing, in an open state when covering the expanded stent in the blood vessel, blood from outside a lumen of the stent to flow inside the lumen and then out of respective gaps of the plurality of line openings into a branch area of the blood vessel, at least substantially closing the gaps in a closed state when the membrane covers the stent and the stent is expanded to the wall of the blood vessel, and changing from the closed state to the open state by expanding outwardly away from the expanded stent in response to blood flow in the lumen when the stent is expanded and resides at the branch area within the blood vessel. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification