APPLIANCE FOR CANNULATION OF A BLOOD VESSEL

• US 20090187133A1
• Filed: 04/01/2009
• Published: 07/23/2009
• Est. Priority Date: 12/23/2002
• Status: Active Grant

• Current Assignee: Novalung GmbH (Fresenius Medical Care AG)
• Original Assignee: Novalung GmbH (Fresenius Medical Care AG)
• Inventors: Frerichs, Heiko, Klietsch, Dietmar, Matheis, Georg, Sandmann, Axel
• Granted Patent: US 8,419,671 B2
• Time in Patent Office: Days
• US Class Current: 604/6.160
• CPC Class Codes: A61M 1/3653 Interfaces between patient blood circulation and extra-corporal blood circuit
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 1/3666 Cardiac or cardiopulmonary bypass, e.g. heart-lung machines
• CPC Class Codes: A61M 2025/1095 with perfusion means for enabling blood circulation while the balloon is in an inflated state or in a deflated state, e.g. permanent by-pass within catheter shaft

Abstract

The present invention relates to an appliance for cannulation of a blood vessel with a cannula which, after introduction into the vessel, is in fluidic communication with the vessel. At least one means is also provided to permit a controlled division of the blood into a first subsidiary stream which leaves the vessel through the cannula, and a second subsidiary stream which continues to flow through the vessel.

Claims

1. A method for establishing an extracorporeal circuit, comprising the steps of

canulating a blood vessel, preferably the femoral artery, with a cannula,

dividing in a controlled manner the blood flowing within said vessel into a first subsidiary stream which leaves the vessel through the cannula, and a second subsidiary stream which is continued through the vessel, and

guiding said first subsidiary blood stream through a lung assist device and then back into an ether blood vessel, preferably into the femoral vein.

2. The method of claim 1, wherein said cannula is part of an appliance for cannulation of a blood vessel with a cannula which, after introduction into the vessel, is in fluidic communication with the vessel, wherein at least one means is provided to permit a controlled division of the blood into a first subsidiary stream which leaves the vessel through the cannula, and a second subsidiary stream which is continued through the vessel.

3. The method of claim 2, wherein the subsidiary stream remaining in the vessel can be guided via the means past the cannula.

4. The method of claim 3, wherein the means is a balloon which surrounds the cannula and which has a surface with at least one groove-like depression.

5. The method of claim 4, wherein the surface with the at least one groove-like depression faces towards the vessel and/or the cannula.

6. The method of claim 3, wherein the means is at least one balloon which surrounds the cannula in sections in such a way that at least two ends of the balloon pointing in the circumferential direction are located at a circumferential distance from one another.

7. The method of claim 6, wherein two balloons are provided which surround the cannula in sections.

8. The method of claim 4, wherein the balloon is dilatable.

9. The appliance of claim 5, wherein the balloon is dilatable.

10. The method of claim 4, wherein the balloon is not dilatable.

11. The method of claim 5, wherein the balloon is not dilatable.

12. The method of claim 2, wherein the subsidiary stream remaining in the vessel can be guided first into the cannula and then out of it via the at least one means.

13. The method of claim 12, wherein the means is an outlet in the cannula.

14. The method of claim 13, wherein the outlet is an opening in the cannula.

15. The method of claim 13, wherein the outlet is a tubular portion on the cannula, which tubular portion is guided in the vessel.

16. The method of claim 13, wherein the outlet is a cannula-like portion on the appliance which portion is guided at least partially outside the vessel.

17. The method of claim 13, wherein a balloon is additionally provided which is arranged on the cannula between the point of entry of the blood into the cannula and the outlet.

18. The method of claim 2, wherein means are additionally provided for measuring at least one of the subsidiary streams.

19. The method of claim 3, wherein means are additionally provided for measuring at least one of the subsidiary streams.

20. The method of claim 11, wherein means are additionally provided for measuring at least one of the subsidiary streams.

21. The method of claim 2, wherein means are additionally provided for Regulating the subsidiary streams.

22. The method of claim 3, wherein means are additionally provided for regulating the subsidiary streams.

23. The method of claim 11, wherein means are additionally provided for regulating the subsidiary streams.

24. The method of claim 18, wherein means are additionally provided for regulating the subsidiary streams.

25. The method of claim 2, wherein the cannula has an external diameter of ca. 5 to 30 French, in particular of 13 to 21 French.

26. The method of claim 2, wherein the cannula is coated with a biocompatible material.

27. The method of claim 1, wherein said cannula is part of an appliance for cannulation of a blood vessel with a cannula which, after introduction into the vessel, is in fluidic communication with the vessel, wherein at least one means is provided to permit a controlled division of the blood into a first subsidiary stream which leaves the vessel through the cannula, and a second subsidiary stream which is continued through the vessel, wherein the subsidiary stream remaining in the vessel can be guided via the means past the cannula.

28. The method of claim 1, wherein said cannula is part of an appliance for cannulation of a blood vessel with a cannula which, after introduction into the vessel, is in fluidic communication with the vessel, wherein at least one means is provided to permit a controlled division of the blood into a first subsidiary stream which leaves the vessel through the cannula, and a second subsidiary stream which is continued through the vessel, wherein the subsidiary stream remaining in the vessel can be guided first into the cannula and then out of it via the at least one means.