Intravascular ventricular assist device

• US 10,052,421 B2
• Filed: 01/10/2018
• Issued: 08/21/2018
• Est. Priority Date: 02/26/2007
• Status: Active Grant

• Current Assignee: Heartware,Inc. (Medtronic Plc)
• Original Assignee: Heartware,Inc. (Medtronic Plc)
• Inventors: Larose, Jeffrey A., Shambaugh, Charles R., White, Daniel G., Marquis, Richard A., White, Steven A., Trichi, Kartikeyan
• Primary Examiner(s): FAIRCHILD, MALLIKA DIPAYAN
• Application Number:
  US15/866,957
• Publication Number:
  US 20180126054A1
• Time in Patent Office: 223 Days
• CPC Class Codes: A61M 2205/0211 Ceramics
• CPC Class Codes: A61M 2205/0272 Electro-active or magneto-active materials
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2210/127 Aorta
• CPC Class Codes: A61M 60/13 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
• 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 60/174 discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system
• 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 60/419 the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
• 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 60/538 Regulation using real-time blood pump operational parameter data, e.g. motor current
• CPC Class Codes: A61M 60/806 Vanes or blades
• CPC Class Codes: A61M 60/81 Pump housings
• CPC Class Codes: A61M 60/824 Hydrodynamic or fluid film bearings
• 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 60/873 specially adapted for wireless or transcutaneous energy transfer [TET], e.g. inductive charging
• CPC Class Codes: A61M 60/876 Implantable batteries
• CPC Class Codes: A61M 60/878 Electrical connections within the patient's body

Abstract

One aspect of an intravascular ventricular assist device is an implantable blood pump where the pump includes a housing defining a bore having an axis, one or more rotors disposed within the bore, each rotor including a plurality of magnetic poles, and one or more stators surrounding the bore for providing a magnetic field within the bore to induce rotation of each of the one or more rotors. Another aspect of the invention includes methods of providing cardiac assistance to a mammalian subject as, for example, a human. Further aspects of the invention include rotor bodies having helical channels formed longitudinally along the length of the body of the rotor where each helical channel is formed between peripheral support surface areas facing radially outwardly and extending generally in circumferential directions around the rotational axis of the rotor.

Claims

1. A method of providing cardiac assistance to a mammalian subject comprising the steps of:

(a) advancing a pump through a vascular system of the subject until the pump is disposed at an operative position at least partially within an artery of the subject, the pump including;

a housing having a bore, one or more rotors disposed within the bore, and one or more stators disposed outside of the housing;

a driveline; and

at least one gripper extending along and attached to the driveline; and

(b) securing the pump at the operative position at least partially by actuating the at least one gripper to engage the artery of the subject.

2. The method of claim 1, wherein the artery is an aorta of the subject.

3. The method of claim 2, wherein the housing has an inlet and an outlet and the advancing step positions the inlet in fluid communication with a left ventricle of the subject'"'"'s heart and place the outlet within the subject'"'"'s aorta.

4. The method of claim 3, wherein the pump includes an intake tube and the advancing and securing steps position the intake tube through an aortic valve of the subject and positions the pump entirely within the aorta with the inlet of the housing communicating with the left ventricle through the intake tube.

5. The method of claim 1, wherein the at least one gripper includes a plurality of grippers, the plurality of grippers including a first strip and a second strip, and wherein the first and second strips are transitionable from a collapsed state in which the first and second strips are wound about the pump to an expanded state in which the first and second strips in an unwound state about the pump.

6. The method of claim 5, wherein in the collapsed state, the first and second strips define a helix about the pump.

7. The method of claim 6, wherein the expanded, state, the first and second strips define a spiral about the pump.

8. The method of claim 7, wherein the first strip extends around the pump in a first direction and the second strip extends around the pump in a second direction opposite the first direction.

9. A method of providing cardiac assistance to a mammalian subject comprising the steps of:

(a) advancing a pump through a vascular system of the subject until the pump is disposed at an operative position at least partially within an artery of the subject, the pump including;

a housing having a bore, one or more rotors disposed within the bore, and one or more stators;

a plurality of grippers including a first strip and a second strip, the first and second strips being transitionable from a collapsed state in which the first and second strips are wound about the pump and define a helix about the pump to an expanded state in which the first and second strips are in an unwound state about the pump and define a spiral about the pump; and

(b) securing the pump at the operative position at least partially by actuating the plurality of grippers to engage the artery of the subject.