Pump-Inflow-Cannula, A Pump-Outflow-Cannula And A Blood Managing System

• US 20120220815A1
• Filed: 01/12/2012
• Published: 08/30/2012
• Est. Priority Date: 02/23/2006
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories Incorporated)
• Original Assignee: Thoratec LLC
• Inventors: Richardson, J. Scott, Gellman, Barry N., Koert, Andrew, Dasse, Kurt
• Granted Patent: US 9,878,087 B2
• Time in Patent Office: Days
• US Class Current: 600/16
• 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 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/232 Centrifugal pumps
• CPC Class Codes: A61M 60/37 Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/38 Blood oxygenation
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing

Abstract

The invention relates to a pump-inflow-cannula (1) providing a blood conduit from a heart (2) and/or from an associated vessel to an external blood handling system. The pump-inflow-cannula comprises a body (3), encompassing an essentially axially extending inflow-lumen (4), having a distal-end (5) for an attachment of the inflow-lumen (4) to the blood handling system, and having a proximal-end (6) for an introduction of blood from the heart (2) and/or from the associated vessel into the inflow-lumen (4), wherein at least one projection (7) is provided at the proximal-end (6) to deflect a heart muscle from intruding into the inflow-lumen (4), wherein the body (3) of the pump-inflow-cannula comprises a reinforcement-means (8). The invention is also related to a pump-outflow-cannula (19) and to a blood managing system comprising a pump-inflow-cannula and a pump-outflow-cannula in accordance with the present invention.

Claims

1. (canceled)

2. A cannula, comprising:

a hollow housing defining a lumen therein and comprising a first end configured to fluidly connect the lumen to a blood handling system, and a second end configured to fluidly connect the lumen to a circulatory system of a human or animal; and

a fastener near the second end of the housing, the fastener comprising screw threads on an outside surface of the housing, the screw threads being configured to be threaded into tissue.

3. The cannula of claim 2, wherein the fastener comprises a helical member defining a thread pitch and embedded in the outside surface of the housing.

4. The cannula of claim 2, wherein the fastener further comprises a sleeve disposed around the housing and configured to hold the tissue interior to the sleeve and against the outside surface of the housing.

5. The cannula of claim 2, further comprising a reinforcing member within the housing.

6. The cannula of claim 5, wherein the reinforcing member comprises a spring.

7. The cannula of claim 6, wherein the spring is a helical flat spring.

8. The cannula of claim 2, wherein the second end is tapered at an inner surface of the housing and substantially straight-walled at the outer surface of the housing.

9. The cannula of claim 2, further comprising a tunneler plug configured to be removably connected to the first end of the housing, the tunneler plug being configured and dimensioned to assist the cannula in tunneling through additional tissue.

10. The cannula of claim 9, wherein the tunneler plug comprises a barbed fitting.

11. The cannula of claim 9, wherein the tunneler plug comprises a tapered section configured to dilate a lumen defined in the additional tissue during passage therethrough.

12. The cannula of claim 9, wherein the tunneler plug is configured for a suture or umbilical tape to be secured thereto, such that the suture or tape serves as a tether to assist in pulling the combination through the additional tissue.

13. The cannula of claim 2, further comprising a sewing ring comprising a flange with a first surface configured to be secured to additional tissue, and a hollow projection extending from a second surface of the flange, configured and dimensioned to secure the cannula therein.

14. The cannula of claim 13, wherein the sewing ring further comprises a soft absorbent pad on the first surface thereof.

15. The cannula of claim 13, wherein the sewing ring further comprises a length of tape attached thereto, configured to be tied around the cannula to secure the cannula to the sewing ring.

16. A blood management system, comprising:

a blood handling system;

an inflow cannula configured to provide fluid communication between a circulatory system of a human or animal and an input of the blood handling system; and

an outflow cannula, comprising;

a hollow housing defining a lumen therein and comprising a first end configured to fluidly connect the lumen to the blood handling system, and a second end configured to fluidly connect the lumen to the circulatory system; and

a fastener near the second end of the housing, the fastener comprising screw threads on an outside surface of the housing, the screw threads being configured to be threaded into tissue.

17. The system of claim 16, further comprising a tunneler plug configured to be removably connected to the inflow or outflow cannula, the tunneler plug being configured and dimensioned to assist the cannula in tunneling through additional tissue.

18. The system of claim 16, further comprising a sewing ring comprising a flange with a first surface configured to be secured to additional tissue, and a hollow projection extending from a second surface of the flange, configured and dimensioned to secure the inflow or outflow cannula therein.

19. A method of connecting a cannula to first tissue, comprising,

providing the cannula, the cannula comprising:

a hollow housing defining a lumen therein and comprising a first end configured to fluidly connect the lumen to a blood handling system, and a second end configured to fluidly connect the lumen to a circulatory system of a human or animal; and

a fastener near the second end of the housing, the fastener comprising screw threads on an outside surface of the housing; and

threading the screw threads into the first tissue to connect the cannula to the first tissue.

20. The method of claim 19, wherein the first tissue comprises a graft.

21. The method of claim 20, wherein the graft comprises a vascular graft.

22. The method of claim 20, further comprising attaching the graft to second tissue.

23. The method of claim 22, wherein the second tissue is tissue of a circulatory system of a human or animal.

24. A method of connecting a blood management system to a circulatory system of a human or animal, comprising:

providing the blood management system, the blood management system comprising;

a blood handling system;

an inflow cannula configured to provide fluid communication between the circulatory system and an input of the blood handling system; and

an outflow cannula, comprising;

a hollow housing defining a lumen therein and comprising a first end configured to fluidly connect the lumen to the blood handling system, and a second end configured to fluidly connect the lumen to the circulatory system; and

a fastener near the second end of the housing, the fastener comprising screw threads on an outside surface of the housing;

threading the screw threads into tissue to connect the cannula to the tissue; and

fluidly connecting the cannulae to the circulatory system.

25. The method of claim 24, further comprising performing a bypass.

26. A method of manufacture of a cannula, comprising:

providing a hollow housing defining a lumen therein and comprising a first end configured to fluidly connect the lumen to a blood management system, and a second end configured to fluidly connect the lumen to a circulatory system of a human or animal; and

embedding a helical member defining a thread pitch in an outside surface of the housing to thereby create screw threads on the outside surface of the housing, the screw threads being configured to be threaded into tissue.

27. The method of claim 26, further comprising extruding an extrusion and winding the extrusion to create the helical member.