Integrated pump and cannula system and related methods

• US 6,974,436 B1
• Filed: 01/14/2000
• Issued: 12/13/2005
• Est. Priority Date: 09/19/1997
• Status: Expired due to Fees

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: A-Med Systems, Inc.
• Inventors: Kanz, William R., Aboul-Hosn, Walid N., McCrystle, Kelly J., Shulock, Damien, Cartwright, James W.
• Primary Examiner(s): Bianco, Patricia
• Application Number:
  US09/889,442
• Time in Patent Office: 2,160 Days
• Field of Search: 604/8, 604/9, 604 27- 28, 604/30, 604/43, 604/48, 604/93.01, 604/131, 604/151, 604/164.11, 604/170.03, 604/247, 604/264, 604/4.01, 604/6.11, 604/523, 604/532, 604/533, 604/537, 604/539, 600 16- 18, 623/3.1, 623/3.13, 623 326- 328, 623/3.15, 415/900, 417/244, 417/254.56
• US Class Current: 604/9
• 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 2205/32 with radio-opaque indicia
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• CPC Class Codes: A61M 60/135 inside a blood vessel, e.g. using grafting
• 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 60/237 the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/35 for specific surgeries, e.g. for Fontan procedure
• CPC Class Codes: A61M 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/441 generated by an electromotor
• CPC Class Codes: A61M 60/531 using blood pressure data, e.g. from blood pressure sensors
• CPC Class Codes: A61M 60/546 of blood flow, e.g. by adapting rotor speed
• CPC Class Codes: A61M 60/859 Connections therefor
• CPC Class Codes: A61M 60/867 using position detection during deployment, e.g. for blood pumps mounted on and driven through a catheter
• CPC Class Codes: A61M 60/894 Passive valves, i.e. valves actuated by the blood
• CPC Class Codes: Y10S 415/90 Rotary blood pump

Abstract

The present invention relates to systems and methods for transporting fluid between different locations within a body cavity and, in one particular application, systems and methods for transporting fluids to maintain at least partial blood flow through a protected blood flow path within the right and/or left side of the heart during surgery. The protected blood flow path may be established by positioning one or more conduits within at least a portion of the right and/or left sides(s) of the heart. At least partial blood flow may be maintained through the protected blood flow path by the pumping action of a blood pump disposed within the conduit.

Claims

1. A system for maintaining at least partial blood flow within a heart, comprising:

a conduit having an inner flow path and an outer flow path, the conduit being sized and configured to be introduced into the heart through at least one of the wall of the right atrium, the wall of the right ventricle, the wall of the pulmonary artery, the wall of left atrium, the wall of the left ventricle, and the wall of the aorta;

said conduit including a blood inlet port communicating with one of the inner flow path and the outer flow path and a blood outlet port communicating with the other one of the inner flow path and the outer flow path, said blood inlet port and said blood outlet port being sized and configured to be positioned on either side of at least one of the tricuspid valve, the pulmonary valve, the bicuspid valve, and the aortic valve; and

a blood pump disposed within said conduit for selectively transporting blood from said blood inlet port to said blood outlet port of said conduit.

2. The system of claim 1, wherein said conduit is sized and configured to be positioned within the heart such that said blood inlet port is disposed within the right atrium, said blood outlet is positioned in the pulmonary artery, and wherein said pump may be selectively operated to maintain at least partial blood flow through the protected blood flow path established within the conduit.

3. The system of claim 1, wherein said conduit is sized and configured to be positioned within the heart such that said blood inlet port is disposed within the left atrium, said blood outlet is positioned in one of the left ventricle and the aorta, and wherein said pump may be selectively operated to maintain at least partial blood flow through the protected blood flow path established within the conduit.

4. The system of claim 1, wherein said conduit is sized and configured to be positioned within the heart such that said blood inlet port is disposed within the pulmonary artery, said blood outlet is positioned in one of the right ventricle and right atrium, and wherein said pump may be selectively operated to maintain at least partial blood flow through the protected blood flow path established within the conduit.

5. The system of claim 1, wherein said conduit is sized and configured to be positioned within the heart such that said blood inlet port is disposed within the right atrium, said blood outlet is positioned in the right ventricle, and wherein said pump may be selectively operated to maintain at least partial blood flow through the protected blood flow path established within the conduit.

6. The system of claim 1, wherein said conduit is sized and configured to be positioned within the heart such that said blood inlet port is disposed within the left atrium, said blood outlet is positioned in the left ventricle, and wherein said pump may be selectively operated to maintain at least partial blood flow through the protected blood flow path established within the conduit.

7. The system of claim 1, wherein said pump is one of an axial flow blood pump and a mixed flow blood pump disposed within the conduit for transporting blood from said blood inlet to said blood outlet.

8. The system of claim 1, further including

a control circuit forming part of said conduit to allow a user to manually or automatically control the speed and rotation of said pump.

9. The system of claim 1, wherein said conduit includes at least one pre-formed curve along its length.