Stent with a covering layer of elastic material and methods for applying the layer on the stent
First Claim
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1. A stent comprising a discontinuous expandable wall and a continuous covering layer of elastic material surrounding the discontinuous wall wherein the continuous covering layer of elastic material is adhered to the discontinuous wall so it is intimately united with said discontinuous wall.
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Abstract
The stent comprises a cylindrical wall formed by meshed wires and a covering layer of elastic material extending on a portion of its length, with an outer surface, and totally embracing the wire mesh.
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Citations
14 Claims
- 1. A stent comprising a discontinuous expandable wall and a continuous covering layer of elastic material surrounding the discontinuous wall wherein the continuous covering layer of elastic material is adhered to the discontinuous wall so it is intimately united with said discontinuous wall.
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9. A method for applying a covering layer to a stent comprising:
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radially contracting the stent;
inserting at least a portion of the contracted stent into a tube the inner surface of which has been previously done over with a lifting medium;
allowing the stent to radially expand in the tube;
wetting the assembly tube plus stent with an elastomeric polymerisable composition dissolved in a sufficient amount of solvent to permit wet forming;
evaporating the solvent;
polymerizing the elastomeric composition in the tube; and
taking the layer covered portion of the stent out of the tube. - View Dependent Claims (10)
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11. A method for applying a covering layer to a stent comprising:
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doing over a roll on surface with a lifting medium;
coating said roll on surface with an elastomeric polymerisable composition dissolved in a sufficient amount of solvent to permit contact forming;
rolling at least a portion of the stent in expanded condition on said coated roll on surface;
withdrawing the stent from the roll on surface;
evaporating the solvent; and
polymerizing the elastomeric composition adhered by contact on said portion of the stent.
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12. A method for applying a covering layer to a stent comprising:
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forming a tube of predetermined length with an elastomeric polymerisable composition;
radially contracting the stent;
inserting into the tube a portion of the stent corresponding to said predetermined length of the tube; and
allowing the stent to radially expand in the tube, and welding the surfaces of contact between the stent and the tube.
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13. A method for applying a covering layer to a stent comprising:
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forming a tube of predetermined length with an elastomeric polymerisable composition;
coating the inside of the tube with an adhesive medium;
radially contracting the stent;
inserting into the tube a portion of the stent corresponding to said predetermined length of the tube;
allowing the stent to radially expand in the tube; and
allowing the adhesive medium to cure.
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14. A method for applying a covering layer to a stent comprising:
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forming a tube of predetermined length with an elastomeric polymerisable composition;
coating the inside of the tube with an elastomeric polymerisable composition dissolved in a sufficient amount of solvent to permit contact forming;
radially contracting the stent;
inserting into the tube a portion of the stent corresponding to said predetermined length of the tube;
allowing the stent to radially expand in the tube;
evaporating the solvent; and
polymerizing the elastomeric composition adhered by contact to the tube and to the stent.
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Specification