System for forming a fistula between two vessels

Patent metadata

Field	Value
Publication number	US-12440267-B2
Application number	US-202218294411-A
Country	US
Kind code	B2
Filing date	Jul 13, 2022
Priority date	Jul 13, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A system for forming a fistula between two vessels, the system comprising a first catheter. The first catheter comprises a catheter shaft with a housing. The first catheter further comprises an electrode disposed at least partially within the housing, the electrode comprising a distal portion, a proximal portion and an intermediate portion therebetween for contacting a vessel wall and forming the fistula. The first catheter further comprises a plurality of teeth for cutting a venous valve, wherein the plurality of teeth extend radially from the catheter shaft and are angled in a proximal direction.

First claim

The invention claimed is:

1. A system for forming a fistula between two vessels, the system comprising a first catheter, the first catheter comprising:
a catheter shaft with a housing;
an electrode disposed at least partially within the housing, the electrode comprising a distal portion, a proximal portion and an intermediate portion therebetween for contacting a vessel wall and forming the fistula; and
a plurality of teeth for cutting a venous valve, wherein the plurality of teeth extend radially from the catheter shaft and are angled in a proximal direction, wherein each of the plurality of teeth includes a radially outer atraumatic surface.

2. The system of claim 1 , wherein the plurality of teeth are positioned distally of the electrode.

3. The system of claim 1 , wherein the plurality of teeth comprise in the range of 2 to 8 teeth.

4. The system of claim 1 , wherein the plurality teeth are spaced around the circumference of the catheter shaft.

5. The system of claim 1 , wherein the plurality of teeth are positioned at the same longitudinal position as one another.

6. The system of claim 1 , wherein the plurality of teeth are fang-shaped.

7. The system of claim 6 , wherein the plurality of fang-shaped teeth have a radially outer surface and a radially inner surface which meet at a pointed end.

8. The system of claim 7 , wherein the radially outer surface is curved.

9. The system of claim 7 , wherein the plurality of fang-shaped teeth have a sharp pointed end for piercing a venous valve.

10. The system of claim 7 , wherein the radially inner surface comprises a cutting edge or a serrated edge.

11. The system of claim 10 , wherein the plurality of fang-shaped teeth have an atraumatic pointed end.

12. The system of claim 1 , wherein the plurality of teeth have an abrasive surface.

13. The system of claim 1 , wherein the first catheter comprises a rapid exchange distal tip.

14. The system of claim 13 , wherein the plurality of teeth are positioned on the rapid exchange distal tip or between the housing and the rapid exchange distal tip.

15. The system of claim 1 , wherein the plurality of teeth are positioned on the housing.

16. The system of claim 1 , wherein the first catheter further comprises a convex stabilizing element, extending from the housing.

17. The system of claim 16 , wherein the convex stabilizing element is positioned opposite the electrode.

18. The system of claim 1 , wherein the electrode has a radially expanded configuration and a radially contracted configuration.

19. The system of claim 1 , wherein the electrode comprises a leaf spring.

20. The system of claim 1 , wherein the electrode has a convex portion.

Assignees

• Clearstream Tech Ltd

Inventors

• Wells Jakob
• O'Shea John
• Whelan Michael

Classifications

• A61B2018/00601

  Cutting · CPC title

• A61B2018/1475

  Electrodes retractable in or deployable from a housing · CPC title

• A61B2018/00184

  Moving parts · CPC title

• A61B2018/00404

  Blood vessels other than those in or around the heart · CPC title

• A61B2017/0088

  ceramic · CPC title