CONTROLLER AND POWER SOURCE FOR IMPLANTABLE BLOOD PUMP

• US 20120226350A1
• Filed: 12/08/2011
• Published: 09/06/2012
• Est. Priority Date: 12/09/2010
• Status: Active Grant

• Current Assignee: Heartware,Inc. (Medtronic Plc)
• Original Assignee: Heartware,Inc. (Medtronic Plc)
• Inventors: LaRose, Jeffrey A., Rudser, John
• Granted Patent: US 8,597,350 B2
• Time in Patent Office: Days
• US Class Current: 623/3.27
• CPC Class Codes: A61M 2205/17 with redundant control systems
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3507 with implanted devices, e.g. external control
• CPC Class Codes: A61M 2205/3569 sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/8206 battery-operated
• 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 60/538 Regulation using real-time blood pump operational parameter data, e.g. motor current
• CPC Class Codes: A61M 60/546 of blood flow, e.g. by adapting rotor speed
• CPC Class Codes: A61M 60/585 User interfaces
• CPC Class Codes: A61M 60/88 Percutaneous cables

Abstract

Methods and apparatus for controlling the operation of, and providing power for and to, implantable ventricular assist devices which includes a pump employing a brushless DC motor-driven blood pump, are disclosed. In one embodiment, a control system for driving an implantable blood pump is provided. The digital processor is responsive to data associated with the operation of the pump received at the data transfer pump, and from program data stored in the memory, (i) to determine therefrom, the identity of the pump, (ii) to determine therefrom, electrical characteristics and features of the identified pump, and (iii) to adaptively generate and apply to the data port, control signals for driving the identified pump.

Claims

1. A control system for driving an implantable blood pump wherein the pump is characterized by a set of electrical characteristics and features, and includes a pump power port for receiving pump drive signals for driving the pump, and includes a pump data port for receiving and transmitting data associated with the operation of the pump, comprising:

a controller including a housing disposed about an interior region, and including;

A. a digital processor and associated memory disposed within the interior region, wherein the memory includes information stored therein, wherein the stored information is representative of a program for controlling operation of the pump,

B. a power supply support structure disposed within the interior region,

C. an electrical power output port extending through the housing, for transmitting electrical power to the pump,

D. a data transfer port extending through the housing, for transmitting and receiving data associated with the operation of the pump,

E. a data conductor assembly disposed within the interior region and associated with the data transfer port, for coupling data associated with the operation of the pump between the digital processor and the data port,

F. an electrical power conductor assembly disposed within the interior region and associated with the power supply support structure, for coupling electrical power from a power supply to the digital processor and for coupling pump drive signals from the digital processor to the electrical power output port,

wherein the digital processor is responsive to data associated with the operation of the pump received at the data transfer port, and from program data stored in the memory,

i. to determine therefrom, the identity of the pump,

ii to determine therefrom, electrical characteristics and features of the identified pump, and

iii. to adaptively generate and apply to the power port, pump drive signals for driving the identified pump.

2. A control system according to claim 1, wherein the power output port and the data transfer port are disposed within a single controller connector assembly.

3. A control system according to claim 2, for use with a pump having the pump power port and the pump data port disposed within a single pump connector assembly, and

further comprising:

an elongated flexible electrical cable extending from a controller end to a pump end, and including a controller-end connector at the controller end and a pump-end connector at the pump end, wherein the controller-end connector is adapted to mate with the controller connector assembly and the pump-end connector is adapted to mate with the pump connector assembly, thereby when the connectors are so mated, power can pass between the power output port and the pump power port and data can pass between the data transfer port and the pump data port.

4. A control system according to claim 3, wherein the flexible electrical cable includes a flexible helical-formed strain relief segment.

5. A control system according to claim 1, wherein the housing extends along a housing axis between a top end of the housing and a bottom end of the housing,

wherein at the top end, the housing includes a top panel having an outer circumferential top boundary and extending transverse to the housing axis, and at the bottom end, the housing includes a bottom panel having an outer circumferential bottom boundary and extending transverse to the housing axis, and

wherein the housing includes a tube comprising a set of contiguous lateral panels disposed about and extending along the housing axis from the top boundary of the top panel to the bottom boundary of the bottom panel, whereby the top panel, the bottom panel and the tube enclose the interior region,

wherein an outermost surface of the top panel is substantially planar,

wherein the tube includes first and second opposing portions, wherein an outermost surface of the first opposing portion is substantially planar and an outermost surface of the second opposing portion is substantially planar.

6. A control system according to claim 5, further comprising:

a first display device disposed on the outermost surface of the top panel, and an associated first display conductor assembly disposed within the interior region for electrically coupling the first display device to the digital processor.

7. A control system according to claim 6, wherein the digital processor is selectively operative to generate a time-remaining (TR) signal having a value corresponding to a calculated remaining time of operation the control system under power from a battery installed in the battery support structure, wherein the value is determined from a measure of a current state of charge of the battery and an expected load/current drawdown pursuant to program data stored in the memory in association with the pump.

8. A control system according to claim 6

a second display device disposed on the outermost surface of the first opposing portion, and an associated second display conductor assembly disposed within the interior region for electrically coupling the second display to the digital processor.

9. A control system according to claim 8 wherein the digital processor is selectively operative to generate a time-remaining (TR) signal having a value corresponding to a calculated remaining time of operation the control system under power from a battery installed in the battery support structure, wherein the value is determined from a measure of a current state of charge of the battery and an expected load/current drawdown pursuant to program data stored in the memory in association with the pump.

10. A control system according to claim 5, wherein the tube is split, thereby defining a circumferential boundary between the top panel and the bottom panel, thereby defining an upper cup-like portion including the top panel and portions of the tube extending therefrom and a lower cup-like portion including the bottom panel and portions of the tube extending therefrom, and

wherein

i. the power supply support assembly is disposed in the interior region bounded by the lower cup-like portion,

ii. the digital processor and associated memory is disposed in the interior region bounded by the upper cup-like portion, and

iii. the second display device is disposed on the outermost surface of the upper cup-like portion, and

further comprising a coupler for reversibly attaching the upper cup-like portion to the lower cup-like portion.

11. A control system according to claim 10, wherein the power supply support structure includes a coupler adapted for receiving power from a source external to the housing.

12. A control system according to claim 10, wherein the power supply support structure is a coupler adapted for supporting a battery in the interior region.

13. A control system according to claim 12, wherein the power supply support structure is shaped to receive a battery having a predetermined exterior shape, and guide movement of the battery during insertion thereof.

14. A control system according to claim 1, wherein the stored information is representative of a plurality of programs, each program for controlling operation of a particular pump, and

wherein digital processor is responsive to data associated with the operation of the pump received at the data transfer pump, and from program data stored in the memory,

i. to determine therefrom, the identity of the particular pump,

ii. to determine therefrom, electrical characteristics and features of the identified particular pump, and

iii, to adaptively generate and apply to the data port, control signals for driving the identified particular pump.

15. A control system according to claim 1, wherein the controller includes a battery in the power supply support structure, whereby power for the pump is applied to the electrical power output port, and

the digital processor is responsive to data associated with the operation of the pump received at the data transfer port, and from program data stored in the memory, to determine therefrom:

the amount of time remaining during which the pump can be driven in accordance with the program.

16. A control system according to claim 15, wherein the controller further includes a display device disposed on the housing, and

wherein the digital processor is adapted to drive the display device to display a human-readable signal representative of the determined amount of time remaining during which the pump can be driven in accordance with the program.

17. A control system according to claim 15, wherein the digital processor is adapted to generate a human-detectable alarm when the determined amount of time remaining during which the pump can be driven in accordance with the program, equals a predetermined threshold.

18. A control system according to claim 17, wherein the alarm is one or more from the group consisting of sound, vibration and light.

19. A control system according to claim 1, wherein

the controller

is adapted to receive a primary battery in the power supply support structure, whereby power for the pump is applied to the electrical power output port, and

further includes

a secondary battery disposed in the interior region, wherein the secondary battery is operative at times when the primary battery is charged below a predetermined threshold or during replacement of the primary battery.

20. A control system according to claim 7, wherein the digital processor controls the first data device to selectively display data representative of the value associated with the time-remaining (TR) signal.

21. A control system according to claim 9, wherein the digital processor controls the second data device to selectively display data representative of the value associated with the time-remaining (TR) signal.