Intravascular ventricular assist device

• US 9,895,476 B2
• Filed: 01/24/2017
• Issued: 02/20/2018
• 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 D
• Application Number:
  US15/414,068
• Publication Number:
  US 20170128647A1
• Time in Patent Office: 392 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 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 coupled to the pump; and

a plurality of grippers coupled to the pump and extending along the driveline 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;

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

(c) actuating the pump to spin the one or more rotors and pump blood distally within the artery solely by applying electrical currents to the one or more stators and to suspend the one or more stators within the bore solely by forces selected from the group consisting of magnetic and hydrodynamic forces applied to the one or more rotors.

2. A method as claimed in claim 1, wherein the artery is an aorta of the subject.

3. A method as claimed in claim 2, wherein the housing has an inlet and an outlet and the advancing step is performed so as to place the inlet in fluid communication with a left ventricle of the subject'"'"'s heart and place the outlet within the subject'"'"'s aorta.

4. A method as claimed in claim 3, wherein the pump includes an intake tube and the advancing and securing steps are performed so as to place the intake tube through an aortic valve of the subject and position the pump entirely within the aorta with the inlet of the housing communicating with the left ventricle through the intake tube.