Intravascular arterial to venous anastomosis and tissue welding catheter and methods

Patent metadata

Field	Value
Publication number	US-11083518-B2
Application number	US-201815940667-A
Country	US
Kind code	B2
Filing date	Mar 29, 2018
Priority date	Jun 15, 2010
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

Systems and methods for creating an arteriovenous (AV) fistula comprise an elongate member, a distal member connected to the elongate member and movable relative to the elongate member, and a heating member disposed on at least one of the movable distal member and the elongate member. The distal member comprises structure for capturing tissue to be cut to create the fistula, and the heating member is adapted to cut through the tissue to create the fistula. The elongate member comprises an elongate outer tube. A shaft connects the distal member to the elongate member, and is extendable and retractable to extend and retract the distal member relative to the elongate member.

First claim

What is claimed is:

1. A device for creating an arteriovenous (AV) fistula, comprising:
an elongate member having a distal tapered face, wherein a first outer edge of the distal tapered face is disposed at a more distal location than a second opposed outer edge of the distal tapered face;
a distal member connected to the elongate member and movable relative to the elongate member, the distal member having a proximal tapered face, the distal tapered face and the proximal tapered face being parallel to and opposed to one another, wherein the distal member is movable between a first configuration in which the distal member is a first distance from the elongate member and a second configuration in which the distal member is a second distance from the elongate member;
a heating member, an entirety of which is disposed around a periphery of, and protruding from, at least one of the proximal tapered face of the distal member or the distal tapered face of the elongate member; and
a shaft configured to couple the distal member to the elongate member, the shaft being joined to and not extending entirely through the distal member and being extendable and retractable to move the distal member between the first and second configurations.

2. The device as recited in claim 1 , wherein said elongate member comprises an elongate outer tube.

3. The device as recited in claim 1 , wherein the distal tapered face and the proximal tapered face are substantially aligned to one another.

4. The device as recited in claim 3 , wherein said heating member is disposed on said proximal tapered face.

5. The device as recited in claim 4 , wherein the heating member comprises a first heating member, the device further comprising a second heating member disposed on said distal tapered face.

6. The device as recited in claim 5 , wherein at least one of said first heating member and said second heating member comprises an energized heater and a heat spreader disposed beneath the energized heater to spread heat away from the heater and create a temperature gradient.

7. The device as recited in claim 6 , wherein the heat spreader comprises heat conductive material, and is disposed beneath the at least one of the first heating member or the second heating member.

8. The device as recited in claim 3 , wherein said heating member is disposed on said distal tapered face of said elongate member.

9. The device as recited in claim 8 , and further comprising a tissue receiving cavity associated with said heating member.

10. The device as recited in claim 8 , wherein said heating member comprises an energized heater and a heat spreader disposed beneath the energized heater to spread heat away from the heater and create a temperature gradient.

11. The device as recited in claim 10 , wherein the heat spreader comprises heat conductive material.

12. The device as recited in claim 1 , wherein said distal member is tapered and flexible.

13. The device as recited in claim 1 , and further comprising at least one strip extending perpendicularly from a portion of the heating member.

14. The device as recited in claim 1 , wherein the distal member comprises structure for capturing tissue to be cut to create the fistula, and the heating member is adapted to cut through the tissue to create the fistula.

15. The device as recited in claim 1 , wherein each of the distal tapered face and the proximal tapered face are non-inflatable and non-deflatable.

16. A device for create an arteriovenous (AV) fistula, comprising:
an elongate member having an elliptical, planar distal face, the elliptical planar distal face being disposed at an angle greater than ninety (90) degrees relative to an axis of the elongate member;
a distal member connected to the elongate member, the distal member having an elliptical, planar proximal face, the elliptical, planar distal face and the elliptical, planar proximal face being substantially parallel to and opposed to one another;
the elliptical, planar proximal face defining an opening, the elliptical, planar distal face having a lateral dimension greater than a diameter of the opening, one of the elongate member or the distal member being movable axially relative to another of the elongate member or distal member between a first configuration and a second configuration;
a heating member disposed on and protruding from at least one of the elliptical, planar proximal face of the distal member or the elliptical, planar distal face of the elongate member;
wherein the heating member is adapted to cut through tissue to create the AV fistula.

17. The device as recited in claim 16 , and further comprising a shaft connecting the distal member to the elongate member, the shaft being joined to and not extending entirely through the distal member and being movable within the opening to move the distal member relative to the elongate member between the first configuration and the second configuration.

18. The device as recited in claim 16 , wherein the heating member is disposed on the elliptical, planar proximal face.

19. The device as recited in claim 18 , wherein the heating member comprises a first heating member, the device further comprising a second heating member disposed on the elliptical, planar distal face.

20. The device as recited in claim 19 , wherein at least one of the first heating member or the second heating member comprises an energized heater and a heat spreader disposed beneath the energized heater to spread heat away from the energized heater and create a temperature gradient.

21. The device as recited in claim 20 , wherein the heat spreader comprises heat conductive material, and is disposed beneath the at least one of the first heating member or the second heating member.

22. The device as recited in claim 16 , and further comprising at least one strip extending perpendicularly from a portion of the heating member.

23. The device as recited in claim 16 , wherein the heating member is disposed on the elliptical, planar distal face of the elongate member.

24. The device as recited in claim 23 , wherein the heating member comprises an energized heater and a heat spreader disposed beneath the energized heater to spread heat away from the energized heater and create a temperature gradient.

25. The device as recited in claim 16 , wherein each of the elliptical, planar distal face and the elliptical, planar proximal face are non-inflatable and non-deflatable.

Assignees

• Avenu Medical Inc

Inventors

• Kellerman Brad M
• Aldridge David Trottingwolf
• Wrolstad David K
• Ritchart Mark A
• Hull Jeffrey E

Classifications

• A61B18/24

  with a catheter (A61B18/26, A61B18/28 take precedence) · CPC title

• A61B17/11

  for performing anastomosis; Buttons for anastomosis · CPC title

• A61B18/1492 Primary

  having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence) · CPC title

• A61B18/08

  by means of electrically-heated probes · CPC title

• A61B2018/00386

  Coronary vessels · CPC title