Biodegradable mesh and film stent
First Claim
1. A biodegradable mesh and film stent for use in maintaining the patency of blood vessels, said stent comprising:
- a mesh layer having first and second sides, formed from a plurality of fibers of a first biodegradable polymer, said plurality of fibers being heat bonded together with a second biodegradable polymer;
at least one layer of a film of a biodegradable polymer bonded to said mesh layer on at least one side of said mesh layer to form a sheet of biodegradable mesh and film material;
said sheet of biodegradable mesh and film material having first and second ends and a main body portion between said first and second ends, said sheet of biodegradable mesh and film material being rolled up into a cylindrical configuration whereby said first end overlaps said second end.
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Accused Products
Abstract
The biodegradable mesh and film stent for use in blood vessels is formed of a sheet of a composite mesh material formed of biodegradable high strength polymer fibers bonded together with a second biodegradable adhesive polymer, and laminated on at least one side with a thin film of a third biodegradable polymer. The biodegradable mesh and film material is formed as a sheet and cut in a shape that can be used as a stent, such as a "belt-buckle" type shape, the ends of which can be joined in a contractible, expandable loop. In the method of making the biodegradable composite mesh and film stent, the composite mesh is preferably formed from a weave formed of high strength biodegradable polymeric fibers, and a plurality of low temperature melting biodegradable polymeric fibers. In an alternate embodiment, the high strength fibers are commingled with the low temperature melting fibers. In another alternate embodiment, the high strength fibers are coated with the low temperature melting polymer. The composite mesh is covered on at least one side by a laminating film, and is then cut into the shape of the stent.
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Citations
34 Claims
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1. A biodegradable mesh and film stent for use in maintaining the patency of blood vessels, said stent comprising:
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a mesh layer having first and second sides, formed from a plurality of fibers of a first biodegradable polymer, said plurality of fibers being heat bonded together with a second biodegradable polymer; at least one layer of a film of a biodegradable polymer bonded to said mesh layer on at least one side of said mesh layer to form a sheet of biodegradable mesh and film material; said sheet of biodegradable mesh and film material having first and second ends and a main body portion between said first and second ends, said sheet of biodegradable mesh and film material being rolled up into a cylindrical configuration whereby said first end overlaps said second end. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A biodegradable mesh and film stent for use in maintaining the patency of blood vessels, said stent comprising:
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a mesh layer having first and second sides, formed from a plurality of fibers of a first biodegradable polymer, said plurality of fibers being heat bonded together with a second biodegradable polymer; at least one layer of a film of a biodegradable polymer bonded to said mesh layer on at least one side of said mesh layer to form a sheet of biodegradable mesh and film material; said sheet of biodegradable mesh and film material having first and second ends and a main body portion between said first and second ends, said first end having a surface defining a slot for receiving said second end, said second end and said main body portion being insertable through said slot so as to form a loop, said second end having means for retaining said second end inserted in said slot, and said main body portion having means for releasably engaging said slot to adjustably retain said main body portion in said slot. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method of making a biodegradable mesh and film stent for use in maintaining the patency of blood vessels, comprising the steps of:
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forming a sheet of biodegradable mesh and film material from a plurality of fibers of a first biodegradable polymer and a second biodegradable polymer, said second biodegradable polymer melting at a lower temperature than the first biodegradable polymer; placing at least one laminating film of a biodegradable polymer, on at least one side of said mesh; heating said laminating film and mesh to melt said second biodegradable polymer and form a mesh and film laminate; and cutting the sheet of biodegradable mesh and film material in a shape to form said stent, said stent being formed to include first and second ends and a main body portion between said first and second ends; and rolling said sheet of biodegradable mesh and film material into a cylindrical configuration whereby said first end overlaps said second end. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of making a biodegradable mesh and film stent for use in maintaining the patency of blood vessels, comprising the steps of:
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forming a mesh of a plurality of fibers of a first biodegradable polymer and a second biodegradable polymer, said second biodegradable polymer melting at a lower temperature than the first biodegradable polymer; placing at least one laminating film of a biodegradable on at least one side of said mesh; heating said laminating film and mesh to melt said second biodegradable polymer and form a mesh and film laminate; and cutting the mesh and film laminate in a shape to form said stent, said stent being formed to include first and second ends and a main body portion between said first and second ends, said first end having a surface defining a slot for receiving said second end, said second end and said main body portion being formed to be insertable through said slot so as to form a loop, said second end being formed to include means for retaining said second end inserted in said slot, and said main body portion being formed to have means for releasably engaging said slot to adjustably retain said main body portion in said slot. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification