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US 11,026,777 B2Granted
Layered medical appliances and methods
AssigneeMerit Medical Systems, Inc.
InventorsJohn Hall, Wayne Mower, Rachel Simmons, Bart Dolmatch
Life of this patent
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Abstract
Medical appliances may be formed of multilayered constructs. The layers of the constructs may be configured with various physical properties or characteristics. The disposition and arrangement of each layer may be configured to create an overall construct with a combination of the individual properties of the layers. Constructs may be used to create vascular prostheses or other medical devices.
Claims13
A multilayered vascular prosthesis, comprising:
- a luminal surface comprising a serially deposited fiber layer;
- and
- an expanded polytetrafluoroethylene (ePTFE) layer coupled to the serially deposited fiber layer, wherein,
- the ePTFE layer comprises one or more sublayers of ePTFE, and
- an axis of longitudinal expansion of at least one of the ePTFE sublayers is disposed at an angle to an axis of longitudinal expansion of at least one adjacent ePTFE sublayer;
- wherein at least one of the ePTFE sublayers is configured to be impermeable to red blood cell migration;
- and
- wherein the one or more sublayers of ePTFE comprise different average pore sizes.
5 more elements
A multilayered vascular prosthesis, comprising:
- a luminal surface comprising a serially deposited fiber layer;
- and
- an expanded polytetrafluoroethylene (ePTFE) layer coupled to the serially deposited fiber layer, the ePTFE layer providing at least 65% of the tensile strength, measured in at least one direction, of a construct consisting of the serially deposited fiber layer and the ePTFE layer;
- wherein the ePTFE layer comprises two or more sublayers of ePTFE,
- wherein the ePTFE layer is configured to be impermeable to red blood cell migration across the ePTFE layer, and wherein pores of at least one of the ePTFE sublayers are misaligned with pores of at least one adjacent ePTFE sublayer.
2 more elements
Dependencies are inferred from the claim text.