CATHETER SYSTEM FOR CONNECTING ADJACENT BLOOD VESSELS

• US 20080065019A1
• Filed: 04/13/2007
• Published: 03/13/2008
• Est. Priority Date: 01/25/2006
• Status: Active Grant

• Current Assignee: PQ Bypass, Inc.
• Original Assignee: PQ Bypass, Inc.
• Inventors: Heuser, Richard, Joye, James
• Granted Patent: US 8,062,321 B2
• Time in Patent Office: Days
• US Class Current: 604/164.03
• CPC Class Codes: A61B 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61B 2017/00876 magnetic
• CPC Class Codes: A61B 2017/06071 with an abrupt angle formed between two adjacent sections
• CPC Class Codes: A61B 2017/1107 for blood vessels
• CPC Class Codes: A61B 2017/1139 Side-to-side connections, e.g. shunt or X-connections
• CPC Class Codes: A61B 2017/22054 with two balloons
• CPC Class Codes: A61B 2017/22069 Immobilising; Stabilising
• CPC Class Codes: A61F 2/2493 Transmyocardial revascularisation [TMR] devices
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility

Abstract

The catheter apparatus may be used to assist in creating a fistula between two adjacent blood vessels. The apparatus includes a catheter for inserting into a first blood vessel which lies adjacent to a second blood vessel, the catheter having a plurality of openings through which a physician may navigate a piercing tool. The physician maneuvers the tip of the catheter to a position within the first blood vessel adjacent to a portion of the first blood vessel wall in which the physician intends to create an opening. The physician may then rotate the piercing tool within the catheter and extend the piercing tool through one opening at a time, without rotating the catheter, until the physician chooses an opening that is properly aimed at the second blood vessel. Such a configuration allows for a wide arc of potential firing space.

Claims

1. A catheter system for piercing a first wall of a first blood vessel and a second wall of a second blood vessel to create a fistula between the blood vessels, the system comprising:

a catheter having an outer surface, a first lumen and a distal end insertable to a position wherein the distal end is adjacent a site within the first blood vessel for the fistula;

a piercing tool for creating the fistula, the piercing tool disposed within and extendable from the first lumen;

a first opening configured to receive the piercing tool and direct it in a first direction relative to the catheter;

a second opening configured to receive the piercing tool and direct it in a second direction relative to the catheter, the second direction being not equal to the first direction.

2. The catheter system of claim 1, wherein the first and second openings are disposed on the outer surface adjacent to the distal end.

3. The catheter system of claim 1, wherein the first and second openings are disposed on the distal end.

4. The catheter system of claim 1, further comprising a third opening configured to receive a portion of the piercing tool and direct it in a third direction relative to the catheter, wherein the third direction is not equal to the first direction and the third direction is not equal to the second direction.

5. The catheter system of claim 4, wherein an arc extending from the first opening to the third opening subtends an angle between 0 and 180 degrees.

6. The catheter system of claim 1, further comprising a resizable portion for stabilizing the catheter within the first blood vessel, the resizable portion disposed on the outer surface adjacent to the distal end so that a first arc of the outer surface is unobstructed by the resizable portion, the resizable portion being manipulable between a nominal configuration and an active configuration, the nominal configuration having a diameter less than the diameter of the first vessel, and the active configuration having a diameter substantially equal to the diameter of the first vessel.

7. The catheter system of claim 6, wherein the resizable portion is a balloon, and the catheter includes a second lumen configured to inflate the balloon.

8. The catheter system of claim 6, the resizable portion comprising three or more retractable members with proximal ends and distal ends, each member being coupled at its proximal end to the outer surface and free at its distal end, whereby the distal ends are in close proximity with the outer surface in the nominal configuration and extended away from the outer surface in the active configuration.

9. The catheter system of claim 8, wherein the members contain metal.

10. The catheter system of claim 8, wherein the members contain nitinol.

11. The catheter system of claim 6, the resizable portion comprising a stent wherein the stent in the nominal configuration is retracted and the stent in the active configuration is expanded.

12. The catheter system of claim 11, wherein the stent is metallic.

13. The catheter system of claim 11, wherein the stent contains nitinol.

14. A catheter system for piercing a first wall of a first blood vessel and a second wall of a second blood vessel to create a fistula between the blood vessels, the system comprising:

a first catheter having a distal end insertable to a position wherein the distal end is adjacent a site within the first blood vessel for the fistula, an outer surface, a lumen, a piercing tool adjacent the distal end and disposed within the lumen, a first opening configured to receive the piercing tool from the lumen and direct it in a first direction relative to the first catheter, and a second opening configured to receive the piercing tool from the lumen and direct it in a second direction relative to the first catheter, wherein the second direction is not equal to the first direction;

a second catheter having a distal end insertable to a position wherein the distal end is adjacent a site within the second blood vessel for the fistula, the second catheter including adjacent the distal end a receptor having a distal opening and a proximal end, the receptor further including a channel leading from the opening toward the proximal end; and

one or more magnets disposed on at least one of the catheters to draw the piercing tool into the channel of the receptor.

15. The catheter system of claim 14, wherein the first and second openings are disposed on the outer surface of the first catheter adjacent to the distal end.

16. The catheter system of claim 14, wherein the first and second openings are disposed on the distal end of the first catheter.

17. The catheter system of claim 14, further comprising a third opening configured to receive a portion of the piercing tool and direct it in a third direction relative to the first catheter, wherein the third direction is not equal to the first direction and the third direction is not equal to the second direction.

18. The catheter system of claim 17, wherein an arc extending from the first opening to the third opening subtends an angle between 0 and 180 degrees.

19. The catheter system of claim 14, further comprising a resizable portion for stabilizing the first catheter within the first blood vessel, the resizable portion disposed on the outer surface of the first catheter adjacent to the distal end so that a first arc of the outer surface is unobstructed by the resizable portion, the resizable portion being manipulable between a nominal configuration and an active configuration, the nominal configuration having a diameter less than the diameter of the first blood vessel, and the active configuration having a diameter substantially equal to the diameter of the first blood vessel.

20. The catheter system of claim 19, wherein the resizable portion is a balloon, and the first catheter includes a second lumen configured to inflate the balloon.

21. The catheter system of claim 19, the resizable portion comprising three or more retractable members with proximal ends and distal ends, each member being coupled at its proximal end to the outer surface of the first catheter and free at its distal end, whereby the distal ends are in close proximity with the outer surface in the nominal configuration and extended away from the outer surface in the active configuration.

22. The catheter system of claim 21, wherein the members contain metal.

23. The catheter system of claim 21, wherein the members contain nitinol.

24. The catheter system of claim 21, the resizable portion comprising a stent wherein the stent in the nominal configuration is retracted and the stent in the active configuration is expanded.

25. The catheter system of claim 24, wherein the stent is metallic.

26. The catheter system of claim 24, wherein the stent contains nitinol.