INTRAVASCULAR BLOOD PUMP AND CATHETER

• US 20090171137A1
• Filed: 03/02/2009
• Published: 07/02/2009
• Est. Priority Date: 09/14/2006
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Marseille, Oliver, Farnan, Robert C.
• Granted Patent: US 8,545,380 B2
• Time in Patent Office: Days
• US Class Current: 600/16
• CPC Class Codes: A61M 2205/32 with radio-opaque indicia
• 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 60/178 drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
• CPC Class Codes: A61M 60/216 including a rotating member acting on the blood, e.g. impeller
• 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 60/861 Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body
• CPC Class Codes: A61M 60/878 Electrical connections within the patient's body

Abstract

An intravascular system for pumping blood from a chamber of a heart and through an associated blood vessel coupled in fluid communication therewith. The system includes a pump device configured to be inserted into a blood vessel. The system further includes a catheter having a proximal end coupled to the pump device and a distal end configured to collect blood within or exiting from the chamber. The catheter further includes a pre-formed shape corresponding to the vessel to at least assist with stabilization and positioning of the pump device in the vessel.

Claims

1. An intravascular system for pumping blood from a chamber of a heart and through an associated blood vessel, comprising:

a pump device configured to be inserted into a blood vessel;

a catheter having a proximal end coupled to said pump device and a distal end configured to collect blood exiting from the chamber, said catheter having a pre-formed shape corresponding to the blood vessel to at least assist with stabilization and positioning of the pump device in the blood vessel.

2. The system of claim 1, wherein said catheter includes first and second lumens, the first lumen configured to transport blood from said distal end to said proximal end, the system further comprising:

a wire inserted into said second lumen, said wire configured to define the pre-formed shape of said catheter.

3. The system of claim 1, wherein said catheter further includes a helical portion, said helical portion being configured to facilitate securing said first end in the blood vessel.

4. The system of claim 3, wherein at least a portion of said catheter extends along an axis and said helical portion extends around said axis generally parallel to a plane transverse to said axis, said catheter further comprising a lumen extending from said distal end to said proximal end and at least one inlet aperture into said lumen on said helical portion, said at least one inlet aperture being positioned to generally face said axis to minimize suction with vascular walls.

5. The system of claim 1, wherein said catheter further includes radiopaque markers to facilitate positioning said catheter and said pump device within the vascular system.

6. The system of claim 1, wherein said catheter further comprises a lumen extending from said distal end to said proximal end, a guidewire entry port in said distal end, and a guidewire exit port in said proximal end.

7. The system of claim 1, wherein said pump device comprises:

a pump housing having a first end coupled to said catheter and a tubular body extending from said first end along an axis, said tubular body having an outer surface and at least one side outlet port extending through said outer surface;

a pump positioned within said tubular body of said pump housing;

a motor housing coupled to said pump housing; and

a motor positioned within said motor housing, said motor being configured to operate said pump so that blood is drawn from said catheter, through said pump housing, and exits from said at least one side port.

8. An intravascular pump device for pumping blood from a catheter, comprising:

a pump housing having a first end adapted to be coupled to the catheter, a second end, and a tubular body extending between said first and second ends along an axis;

a pump positioned within said tubular body of said pump housing;

a motor housing coupled to said pump housing along said axis and positioned proximate said second end, said motor housing having a diameter smaller than said tubular body such that said pump housing defines an outlet extending along said axis between said tubular body and said motor housing; and

a motor positioned within said motor housing, said motor being configured to operate said pump so that blood is drawn from said catheter, moves through said tubular body of said pump housing, and exits from said outlet.

9. The pump device of claim 8, further comprising:

a power cable coupled to said motor housing along said axis.

10. The pump device of claim 8, wherein said motor housing has a tapered portion.

11. The pump device of claim 8, wherein said pump housing is defined by a pump inlet housing coupled to the catheter and a pump outlet housing coupled to said motor housing.

12. The pump device of claim 11, wherein said pump outlet housing further includes at least two vanes coupling said motor housing to said pump outlet housing.