Catheters with fluoropolymer additives
View Patent ↗The present invention provides catheter compositions that provide anti-thrombogenic properties while not adversely impacting mechanical properties. All embodiments of the present invention comprise a catheter that comprises a fluoropolymer additive with specific compositions and/or purity levels.
1. A catheter comprising:
an elongated tubular structure comprising:
a polymeric material;
an outer surface, a proximal end, a distal end, and a lumen, wherein said outer surface and said lumen extend between said proximal and distal ends; and
a wall thickness between said outer surface and said lumen, said wall thickness being at least 0.005 inches;
wherein said polymeric material comprises polyurethane and additives, said additives comprising 25-35 weight percent of a radiopaque material, 1.5-2.5 weight percent of a polymer comprising terminal polyfluoro-oligomeric groups, and a colorant.
2. The catheter of claim 1 , wherein said polymeric material is comprised of a positive amount of up to about 40 weight percent of said additives.
3. The catheter of claim 1 , wherein said polymeric material is comprised of a positive amount of up to about 33 weight percent of said additives.
4. The catheter of claim 1 , wherein said polymeric material comprises a positive amount of up to about 2.0 weight percent of said colorant.
5. The catheter of claim 4 , wherein said polymeric material comprises a positive amount of up to about 0.2 weight percent of said colorant.
6. The catheter of claim 1 , wherein said polymeric material comprises a positive amount of up to about 30 weight percent of said radiopaque material.
7. The catheter of claim 1 , wherein said radiopaque material comprises barium sulfate.
8. The catheter of claim 1 , wherein said elongated tubular structure comprises a plurality of lumens.