Intravascular ventricular assist device

• US 9,579,433 B2
• Filed: 02/03/2014
• Issued: 02/28/2017
• Est. Priority Date: 02/26/2007
• Status: Active Grant

• Current Assignee: Heartware,Inc. (Medtronic Plc)
• Original Assignee: Heartware,Inc. (Medtronic Plc)
• Inventors: Trichi, Kartikeyan, LaRose, Jeffrey A., Shambaugh, Charles R. Jr., White, Daniel G., Marquis, Richard A., White, Steven A.
• Primary Examiner(s): FAIRCHILD, MALLIKA DIPAYAN
• Application Number:
  US14/171,615
• Publication Number:
  US 20140148638A1
• Time in Patent Office: 1,121 Days
• US Class Current: 1/1
• 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. An implantable blood pump comprising:

(a) a housing defining a bore having an inlet, an outlet and an axis extending between the ends;

(b) one or more rotors disposed within the bore coaxial with the bore, each rotor including a permanent magnet;

(c) one or more stators disposed outside of the bore each opposite a rotor for providing a rotating magnetic field within the bore;

(d) a first gripper mechanically connected to the housing and to the one or more stators, the first gripper being adapted to engage a wall of an artery and hold the housing and stators in an operative position at least partially within the artery;

(e) a driveline extending downstream from the pump; and

(f) a plurality of second grippers along the length of the driveline for maintaining the driveline away from the wall of the artery;

(g) a plurality of gripper supports attached along the length of the driveline at a predetermined distance from one another, each of the plurality of second grippers associated with one of the plurality of gripper supports,

the one or more rotors being constructed and arranged so that during operation of the pump the one or more rotors are suspended within the bore of the housing and out of contact with the housing solely by forces selected from the group consisting of magnetic and hydrodynamic forces on the rotors.

2. A pump as claimed in claim 1 wherein the one or more rotors are the only elements of the pump which move during operation.

3. A pump as claimed in claim 1,

wherein the housing is elongated and has an inlet and an outlet end, and

wherein at least one of the first and second grippers includes an expansible element connected to the housing adjacent the outlet end.

4. A pump as claimed in claim 3 wherein the expansible element includes a tubular stent.

5. A pump as claimed in claim 3 wherein the housing has an axis and the expansible element includes a plurality of fingers spaced circumferentially around the axis.

6. A pump as claimed in claim 3 wherein the housing has an axis and the expansible element includes first and second spiral springs having an inner end secured to the housing and extending in opposite circumferential directions around the axis of housing.

7. An implantable blood comprising:

(a) a housing defining a bore having an inlet, an outlet and an axis extending between the ends;

(b) one or more rotors disposed within the bore coaxial with the bore, each rotor including a permanent magnet;

(c) one or more stators disposed outside of the bore each opposite a rotor for providing a rotating magnetic field within the bore;

(d) a first gripper mechanically connected to the housing and to the one or more stators, the first gripper being adapted to engage a wall of an artery and hold the housing and stators in an operative position at least partially within the artery;

(e) a driveline extending downstream from the pump; and

(f) a plurality of second grippers attached along the length of the driveline at a predetermined distance form one another for maintaining the driveline away from the wall of the artery,

the one or more rotors being constructed and arranged so that during operation of the pump the one or more rotors are suspended within the bore of the housing and out of contact with the housing solely by forces selected from the group consisting of magnetic and hydrodynamic forces on the rotors.