Implantable heart assist system and method of applying same

• US 20040236173A1
• Filed: 06/28/2004
• Published: 11/25/2004
• Est. Priority Date: 02/15/2002
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories Incorporated)
• Original Assignee: ORQIS Medical Corporation
• Inventors: Werner, Wolfgang, Beizai, Masoud, Bolling, Steven F., Pecor, Robert, Sirimanne, Laksen, Viole, Anthony, Kelly, Ryan, OʼLeary, Shawn
• Granted Patent: US 7,331,921 B2
• Time in Patent Office: Days
• US Class Current: 600/16
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3655 Arterio-venous shunts or fistulae
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 60/117 for assisting the heart, e.g. transcutaneous or external ventricular assist devices
• 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 60/152 branching on and drawing blood from a blood vessel
• CPC Class Codes: A61M 60/165 implantable in, on, or around the heart
• 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 60/274 the inlet and outlet being the same, e.g. para-aortic counter-pulsation blood pumps
• CPC Class Codes: A61M 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/422 the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
• CPC Class Codes: A61M 60/515 Regulation using real-time patient data
• CPC Class Codes: A61M 60/538 Regulation using real-time blood pump operational parameter data, e.g. motor current
• CPC Class Codes: A61M 60/857 Implantable blood tubes

Abstract

An extracardiac pumping for supplementing the circulation of blood, including the cardiac output, in a patient without any component thereof being connected to the patient'"'"'s heart, and methods of using same. One embodiment of the intravascular extracardiac system comprises a pump with inflow and outflow conduits that are sized and configured to be implantable intravascularly through a non-primary vessel, whereby it may positioned where desired within the patient'"'"'s vasculature. The system comprises a subcardiac pump that may be driven directly or electromagnetically from within or without the patient. The pump is configured to be operated continuously or in a pulsatile fashion, synchronous with the patient'"'"'s heart, thereby potentially reducing the afterload of the heart. In another embodiment, the system is positioned extracorporeally, with the inflow conduit and outflow conduit applied percutaneously to a non-primary vessel for circulating blood to and from the non-primary vessel or between the non-primary vessel and another blood vessel within the patient'"'"'s vasculature.

Claims

1. An intravascular system for increasing perfusion through a renal artery, comprising:

means for pumping blood; and

a conduit fluidly coupled with the pumping means and configured to direct blood in the descending aorta toward a renal artery to maintains or enhance blood flow to a kidney supplied by the renal artery;

whereby the pumping means and the conduit are configured to be insertable into a non-primary vessel subcutaneously in a minimally-invasive procedure.

2. The pumping system of claim 1, wherein the conduit comprises an inlet and an outlet, the conduit configured such that when the system is applied within the vasculature the inlet is positioned at a first location in the descending aorta and the outlet is positioned at a second location in the descending aorta below the first location.

3. The pumping system of claim 1, further comprising an open sided housing that permits blood flow therethrough and that houses at least a portion of the pumping means.

4. The pumping system of claim 1, wherein the pumping means further comprising pump driving means configured to be advanced into the patient'"'"'s vasculature.

5. The pumping system of claim 1, wherein the conduit has a transverse dimension that is meaningfully smaller the transverse dimension of a location in the descending aorta where the conduit is positioned.

6. The pumping system of claim 1, wherein the conduit has a first cross-sectional area and a location in the descending aorta where the conduit is positioned has a second cross-sectional area, the first cross-sectional area-being less than about one-half the second cross-sectional area.

7. The pumping system of claim 1, wherein the conduit comprises a first lumen in which at least a portion of the pumping means is housed and a second lumen adjacent and parallel to the first lumen.

8. A method for increasing perfusion through a renal artery, the method comprising:

providing fluid communication between a conduit and means for pumping blood;

advancing the pumping means to a location within the descending aorta and an outlet of the conduit to a location proximate a renal artery; and

operating said pumping means to direct blood from the descending aorta to the renal artery at volumetric rates that are on average subcardiac to increase perfusion through the renal artery.

9. The method of claim 8, further comprises advancing pump driving means into the vasculature.

10. The method of claim 8, wherein advancing further comprises advancing the conduit to a location in the vasculature having a width that is meaningfully larger than the width of the conduit.

11. The method of claim 8, wherein the conduit has a first width and advancing comprises advancing the conduit to a location within the vasculature having a second width, the first width being less than about one-half the second width.

12. The method of claim 8, further comprising providing a blood flow path in a side lumen of the conduit adjacent the pumping means.