Methods and systems for providing battery feedback to patient

• US 10,388,142 B2
• Filed: 10/02/2018
• Issued: 08/20/2019
• Est. Priority Date: 04/15/2014
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories)
• Original Assignee: TC1 LLC (Abbott Laboratories)
• Inventors: Kimball, Brian, Dague, Charles, Wu, W. Kevin
• Primary Examiner(s): Yacob, Sisay
• Application Number:
  US16/150,145
• Publication Number:
  US 20190035254A1
• Time in Patent Office: 322 Days
• 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 60/538 Regulation using real-time blood pump operational parameter data, e.g. motor current
• CPC Class Codes: A61M 60/585 User interfaces
• CPC Class Codes: A61M 60/814 Volutes
• CPC Class Codes: A61M 60/82 Magnetic bearings
• CPC Class Codes: A61M 60/857 Implantable blood tubes
• CPC Class Codes: A61M 60/863 Apex rings
• CPC Class Codes: A61M 60/88 Percutaneous cables
• CPC Class Codes: G08B 21/182 Level alarms, e.g. alarms responsive to variables exceeding a threshold

Abstract

A method for outputting a combined power source alarm for an implantable blood pump includes determining a status for each of first and second power sources of the blood pump. A combined power source alarm based on the statuses of the first and second power sources is outputted. A method for generating an alarm based on fault detections in a mechanically assisted circulation system includes processing a series of fault detection indications to classify a fault as active or inactive. An alarm is generated if the fault is active for more than a predetermined amount of time.

Claims

1. A method of generating an alarm in a mechanically assisted circulation (MAC) system, the method comprising:

monitoring a subsystem of the MAC system, by a subsystem monitor module, to detect a fault condition of the subsystem;

generating, by the subsystem monitor module, a series of indications for the fault condition indicative of whether the fault condition is detected during a respective time period;

processing the series of indications, by a fault handler module, to generate a fault status output indicative of whether the fault condition is classified as being active, the fault handler module classifying the fault condition as active if each of a first subseries of the series of indications at the end of the series of indications indicate detection of the fault condition, the first subseries including a predetermined set soaking number of the series of indications, the set soaking number being at least two; and

outputting an alarm for the fault condition in response to the fault condition being reclassified as active by the fault handler module.

2. The method of claim 1, wherein the set soaking number is from three to ten.

3. The method of claim 1, wherein:

the subsystem comprises a blood pump assembly; and

the fault condition comprises a fault condition of the blood pump assembly.

4. The method of claim 3, wherein the fault condition comprises one of:

a low flow fault condition;

a pump stopped fault condition;

a low speed hazard fault condition; and

a low speed advisory fault condition.

5. The method of claim 3, wherein the fault condition comprises a suction event fault condition.

6. The method of claim 3, wherein the fault condition comprises one of:

excessive rotor displacement fault condition;

excessive rotor noise fault condition;

a magnetic centering fault condition;

a harmonic compensation fault condition; and

a displacement fault condition.

7. The method of claim 3, wherein the fault condition comprises a circuit over temperature fault condition.

8. The method of claim 3, wherein the fault condition comprises one of:

a magnetic bearing over current fault condition; and

a drive coil over current fault condition.

9. The method of claim 1, wherein:

the subsystem comprises a battery power supply system; and

the fault condition comprises a fault condition of the battery power supply system.

10. The method of claim 9, wherein the fault condition comprises one of:

a battery cable disconnect fault condition;

a battery relative state of charge fault condition;

a battery voltage level fault condition; and

an unknown power source fault condition.

11. The method of claim 1, wherein:

the subsystem comprises an emergency backup battery (EBB); and

the fault condition comprises a fault condition of the blood pump assembly.

12. The method of claim 11, wherein the fault condition comprises one of:

usage duration of the EBB exceeding a usage duration limit fault condition;

an expiration date for the EBB has passed fault condition;

a memory tag fault condition;

a communication fault condition;

a charge failure fault condition; and

the EBB being used to power the MAC system fault condition.

13. The method of claim 1, wherein the fault conditions is classified as being active or inactive at any particular time.

14. The method of claim 1, wherein outputting the alarm for the fault condition comprises generating the alarm for the fault condition, by an alarm handler module, in response to the fault status output indicating, for a persistence time between one and fifteen seconds, that the fault condition is classified as active.

15. The method of claim 1, wherein the fault handler module classifies the fault condition as inactive if each of a second subseries of the series of indications at the end of the series of indications indicate non-detection of the fault condition, the second subseries including a predetermined clear soaking number of the series of indications.

16. The method of claim 15, wherein the clear soaking number is from one to three.

17. The method of claim 15, wherein the clear soaking number is equal to or greater than the set soaking number.

18. A method of generating an alarm in a mechanically assisted circulation (MAC) system, the method comprising:

monitoring a subsystem of the MAC system, by a subsystem monitor module, to detect a fault condition of the subsystem;

generating, by the subsystem monitor module, a series of indications indicative of whether the fault condition is detected by the subsystem monitor module;

processing the series of indications, by a fault handler module, to generate a fault status output indicative of whether the fault condition is classified as being active, the fault handler module classifying the fault condition as active if each of a first subseries of the series of indications at the end of the series of indications indicate detection of the fault condition, the first subseries including a predetermined set soaking number of the series of indications; and

outputting an alarm for the fault condition in response to the fault condition being classified as active for a persistence time between one and fifteen seconds.

19. The method of claim 18, wherein the fault handler module classifies the fault condition as inactive if each of a second subseries of the series of indications at the end of the series of indications indicate non-detection of the fault condition, the second subseries including a predetermined clear soaking number of the series of indications.

20. The method of claim 19, further comprising clearing the alarm in response to the fault condition be reclassified from active to inactive.