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US 12,576,239 B2Granted
Catheter shaft with flouropolymer inner liner and related methods
AssigneeSt. Jude Medical, Cardiology Division, Inc.
InventorXiaoping Guo
Life of this patent
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Abstract
Embodiments include a catheter comprising a proximal handle, a distal tip, and a shaft extending between the proximal handle and the distal tip. The shaft comprises an outer polymer layer, and an inner polymer layer disposed adjacent to the outer polymer layer and defining an internal lumen. The inner polymer layer includes a blend of two or more polymers, and the blend of two or more polymers includes PTFE and one or more copolymers.
Claims10
A catheter comprising:
- a proximal handle;
- a distal tip;
- and
- a shaft extending between the proximal handle and the distal tip, the shaft comprising:
- an outer polymer layer;
- and
- an inner polymer layer disposed adjacent to the outer polymer layer and defining an internal lumen;
- wherein the inner polymer layer includes a blend of two or more polymers;
- wherein the blend of two or more polymers includes an integral blend of PTFE and one or more perfluorinated copolymers formed under conditions in which the PTFE and one or more perfluorinated copolymers are molten, the one or more perfluorinated copolymers including a PFA copolymer, wherein a weight percentage of PTFE in the integral blend ranges from 5 wt. % to 30 wt. %, and a weight percentage of the PFA copolymer in the integral blend is greater than 30 wt. %,
- wherein the inner polymer layer exhibits a coefficient of friction against nylon value ranging from 0.09 to 0.11.
7 more elements
A catheter liner comprising:
- an inner polymer layer disposed adjacent to an outer polymer layer and defining an internal lumen;
- wherein the inner polymer layer includes a blend of two or more polymers;
- and
- wherein the blend of two or more polymers includes an integral, melt-extruded blend of PTFE and one or more perfluorinated copolymers formed under conditions in which the PTFE and one or more perfluorinated copolymers are molten, the one or more perfluorinated copolymers including a PFA copolymer, wherein a weight percentage of PTFE in the integral, melt-extruded blend ranges from 5 wt. % to 30 wt. %, and a weight percentage of the PFA copolymer in the integral, melt-extruded blend is greater than 30 wt. %,
- wherein the inner polymer layer exhibits a coefficient of friction against nylon value ranging from 0.09 to 0.11.
2 more elements
Dependencies are inferred from the claim text.