CATHETER INCLUDING LEAK RESISTANT PROXIMAL SHAFT

• US 20170043060A1
• Filed: 08/12/2015
• Published: 02/16/2017
• Est. Priority Date: 08/12/2015
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Wang, Edwin, Lim, Komonn
• Granted Patent: US 10,568,991 B2
• Time in Patent Office: Days
• CPC Class Codes: A61L 2420/00 Materials or methods for coatings medical devices
• CPC Class Codes: A61L 29/02 Inorganic materials
• CPC Class Codes: A61L 29/085 Macromolecular materials
• CPC Class Codes: A61M 2025/0098 having a strain relief at the proximal end, e.g. sleeve
• CPC Class Codes: A61M 25/0014 Connecting a tube to a hub
• CPC Class Codes: A61M 25/0043 characterised by structural features
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10

Abstract

A catheter may include a hypotube defining an inner circumferential surface, an outer circumferential surface, and an end. The hypotube may include a metal or alloy. The catheter also may include an inner liner attached to the inner circumferential surface of the hypotube and extending beyond the end of the hypotube, and the inner liner may include a fluoropolymer. The catheter further may include a hub and a single bonding layer attached to the outer circumferential surface of the hypotube and bonded to the hub. The single bonding layer may include a polyamide, a polyether-co-polyamide, or polyurethane and is the only layer between the outer circumferential surface of the hypotube and the hub.

Claims

1. A catheter comprising:

a hypotube defining an inner circumferential surface, an outer circumferential surface, and an end, wherein the hypotube comprises a metal or alloy;

an inner liner attached to the inner circumferential surface of the hypotube and extending beyond the end of the hypotube, wherein the inner liner comprises a fluoropolymer;

a hub; and

a single bonding layer attached to the outer circumferential surface of the hypotube and bonded to the hub, wherein the single bonding layer comprises a polyamide or a polyether-co-polyamide, and wherein the single bonding layer is the only layer between the outer circumferential surface of the hypotube and the hub.

2. The catheter of claim 1, wherein the single bonding layer consists essentially of the polyamide or the polyether-co-polyamide.

3. The catheter of claim 1, wherein the single bonding layer consists essentially of polyether-co-polyamide.

4. The catheter of claim 1, wherein the single bonding layer consists essentially of polyurethane.

5. The catheter of claim 1, wherein the single bonding layer consists essentially of Acrylate-butadiene-styrene copolymer.

6. The catheter of claim 1, wherein the hub comprises polypropylene.

7. The catheter of claim 1, wherein the hub is overmolded or adhesively bonded to the single bonding layer.

8. The catheter of claim 1, wherein the inner liner comprises polytetrafluoroethylene (PTFE).

9. The catheter of claim 1, wherein the single bonding layer extends beyond the end of the hypotube and is bonded to the inner liner.

10. The catheter of claim 9, wherein the single bonding layer extends beyond the end of the hypotube substantially the same distance as the inner liner extends beyond the end of the hypotube.

11. The catheter of claim 1, wherein the metal or alloy comprises at least one of stainless steel or a nickel-titanium alloy.

12. The catheter of claim 1, wherein the hypotube comprises a spiral-cut tube or slotted tube.

13. A catheter comprising:

a hypotube defining an inner circumferential surface, an outer circumferential surface, and an end, wherein the hypotube comprises a stainless steel or a nickel titanium alloy;

an inner liner attached to the inner circumferential surface of the hypotube and extending beyond the end of the hypotube, wherein the inner liner comprises a polytetrafluoroethylene;

a hub; and

a single bonding layer attached to the outer circumferential surface of the hypotube and bonded to the hub, wherein the single bonding layer consists essentially of a polyamide or a polyether-co-polyamide, wherein the single bonding layer extends beyond the end of the hypotube substantially the same distance as the inner liner extends beyond the end of the hypotube and is bonded to the inner liner, and wherein the single bonding layer is the only layer between the outer circumferential surface of the hypotube and the hub and is the only layer between the inner liner and the hub.

14. The catheter of claim 13, wherein the hub comprises polypropylene.

15. The catheter of claim 13, wherein the hypotube comprises a spiral-cut tube or slotted tube.

16. A method comprising:

attaching an inner liner to an inner circumferential surface of a hypotube, wherein the inner liner extends beyond the end of the hypotube, wherein the inner liner comprises a fluoropolymer, wherein the inner liner further defines an outer circumferential surface and an end, and wherein the hypotube comprises a metal or alloy;

attaching a single bonding layer to the outer circumferential surface of the hypotube, wherein the single bonding layer comprises a polyamide or a polyether-co-polyamide; and

attaching a hub to an outer surface of the single bonding layer, wherein the single bonding layer is the only layer between the hypotube and the hub.

17. The method of claim 16, wherein the single bonding layer consists essentially of the polyamide or the polyether-co-polyamide.

18. The method of claim 16, wherein the single bonding layer consists essentially of polyether-co-polyamide.

19. The method of claim 16, wherein the hub comprises polypropylene.

20. The method of claim 16, wherein attaching the hub to the outer surface of the single bonding layer comprises overmolding or adhesively bonding the hub to the outer surface of the single bonding layer.

21. The method of claim 16, wherein the inner liner comprises polytetrafluoroethylene (PTFE).

22. The method of claim 16, wherein the single bonding layer extends beyond the end of the hypotube and is bonded to the inner liner.

23. The method of claim 22, wherein the single bonding layer extends beyond the end of the hypotube substantially the same distance as the inner liner extends beyond the end of the hypotube.