Dialysis catheters with fluoropolymer additives
First Claim
1. A catheter comprising:
- a catheter shaft (a) defining first and second shaft lumens and (b) forming a distal portion of the catheter, wherein the distal portion of the catheter includes a distal end portion having a distal tip and at least a portion of the distal end portion is substantially sloped with a sloped face that is angled proximally away from the distal tip and is positioned at an acute angle relative to a longitudinal axis of the catheter shaft; and
wherein the catheter comprises a fluoropolymer comprising polyfluoro oligomeric groups;
wherein the fluoropolymer is characterized by a weight average molecular weight (Mw) greater than 13 kDa; and
wherein the fluoropolymer comprises a trimer in an amount greater than 0 and less than 5.0 percent by weight of the fluoropolymer, wherein the trimer is formed by a reaction of one equivalent of diisocyanate with two equivalents of a perfluorinated alcohol to form a low molecular weight fluoropolymer component containing no soft segment.
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Accused Products
Abstract
A vascular access catheter is disclosed that has a catheter shaft with a distal end portion with a distal tip having a sloped face that is positioned at an acute angle from the distal tip relative to a longitudinal axis of the catheter shaft. A first, second, and third lumen extend longitudinally through the catheter shaft. The third lumen is configured for receiving a guidewire and may extend a partial length of the catheter or substantially the entire length of the catheter. The first lumen has an aperture located in the angled edge distal end portion of the catheter next to the distal tip and communicates with the first lumen. The second lumen has an aperture that is positioned in the outer surface of the catheter shaft that is in communication with the second lumen, and is spaced proximally from the first lumen aperture. The catheter includes a fluoropolymer additive with specific compositions and/or purity levels.
62 Citations
21 Claims
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1. A catheter comprising:
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a catheter shaft (a) defining first and second shaft lumens and (b) forming a distal portion of the catheter, wherein the distal portion of the catheter includes a distal end portion having a distal tip and at least a portion of the distal end portion is substantially sloped with a sloped face that is angled proximally away from the distal tip and is positioned at an acute angle relative to a longitudinal axis of the catheter shaft; and wherein the catheter comprises a fluoropolymer comprising polyfluoro oligomeric groups;
wherein the fluoropolymer is characterized by a weight average molecular weight (Mw) greater than 13 kDa; and
wherein the fluoropolymer comprises a trimer in an amount greater than 0 and less than 5.0 percent by weight of the fluoropolymer, wherein the trimer is formed by a reaction of one equivalent of diisocyanate with two equivalents of a perfluorinated alcohol to form a low molecular weight fluoropolymer component containing no soft segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A catheter comprising:
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a shaft comprising a first lumen, a second lumen, and a distal tip, each of said first and second lumens separated by a common internal septum and terminating at respective first and second apertures; and an apex in the shaft defining a portion of the first lumen distal to the second aperture; wherein the catheter comprises a fluoropolymer comprising polyfluoro oligomeric groups, said fluoropolymer characterized by a weight average molecular weight (Mw) greater than 13 kDa;
wherein the fluoropolymer comprises a trimer in an amount greater than 0 and less than 5.0 percent by weight of the fluoropolymer, wherein the trimer is formed by a reaction of one equivalent of diisocyanate with two equivalents of a perfluorinated alcohol to form a low molecular weight fluoropolymer component containing no soft segment; andwherein a distance between said apex and a longitudinal axis of said shaft is equal to or greater than a distance between an outer wall defining said second lumen and said longitudinal axis of said shaft. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification