Rotational spun material covered medical appliances and methods of manufacture
AssigneeMerit Medical Systems, Inc.
InventorsJohn William Hall, Zeke Eller, Robert S. Kellar, Rachel Lynn Simmons, Bart Dolmatch, Wayne L. Mower
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Abstract
A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (PTFE). Rotational spun nanofiber mats of certain porosities may permit tissue ingrowth into or attachment to the prosthesis. Additionally, one or more cuffs may be configured to allow tissue ingrowth to anchor the prosthesis.
Claims21
-33. (canceled)
A medical appliance, comprising:
- a first layer of polytetrafluoroethylene (PTFE);
- a tie layer coupled to the first layer, wherein the tie layer is impervious to cell migration into the tie layer;
- and
- a second layer of expanded polytetrafluoroethylene (ePTFE),
- wherein at least one end of the medical appliance comprises scalloped portions.
The medical appliance of claim 1, wherein the second layer comprises expanded polytetrafluoroethylene (ePTFE).
A medical appliance, comprising:
- a first layer of polytetrafluoroethylene (PTFE);
- a tie layer coupled to the first layer, wherein the tie layer is impervious to cell migration into the tie layer;
- and
- a second layer of expanded polytetrafluoroethylene (ePTFE),
- wherein at least one end of the medical appliance comprises featured configured to reduce infolding of the medical appliance when the medical appliance is radially constrained.
A medical appliance, comprising:
- a first layer of rotational spun PTFE fibers;
- a tie layer coupled to the first layer;
- and
- a second layer,
- wherein at least one end of the medical appliance comprises scalloped portions.
Dependencies are inferred from the claim text.