HVAD circadian tracker (PHI+)

1. A method of detecting a disruption in a diurnal rhythm of a patient having an implantable blood pump, comprising:

calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump; and

generating an alert when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold.

2. The method of claim 1 , wherein the MACD zero line crossing time threshold is 24 hours.

3. The method of claim 1 , wherein calculating the MACD includes calculating a slow moving average (SMA), and wherein the SMA is a one second average measurement of the power consumed by the implantable blood pump measured at a predetermined interval for a first predetermined period of time.

4. The method of claim 3 , wherein the predetermined interval is 15 minutes.

5. The method of claim 4 , wherein the first predetermined period of time is 48 hours.

6. The method of claim 3 , wherein calculating the MACD includes calculating a fast moving average (FMA), and wherein the FMA is a one second average measurement of the power consumed by the implantable blood pump measured at the predetermined interval for a second predetermined period of time less the first period of time.

7. The method of claim 6 , wherein the second predetermined period of time is four hours.

8. The method of claim 1 , wherein the patient has a diurnal cycle, and wherein generating the alert is indicative of a loss of the patient's diurnal cycle.

9. The method of claim 8 , wherein the method further includes correlating the loss of the patient's diurnal cycle to at least one from the group consisting of thrombus and tachycardia.

10. The method of claim 1 , wherein generating an alert includes at least one from group consisting of sounding an alarm on a controller of the implantable blood pump and displaying a time and date of the alert in a log file of a controller of the implantable blood pump.

11. A system of detecting a disruption in a diurnal rhythm of a patient having an implantable blood pump, comprising:

a controller having a processor, the controller being in communication with the implantable blood pump and a power source configured to provide power to the implantable blood pump, the controller being configured to:

calculate a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump; and

generate an alert when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold.

12. The system of claim 11 , wherein the MACD zero line crossing time threshold is 24 hours.

13. The system of claim 11 , wherein calculating the MACD includes calculating a slow moving average (SMA), and wherein the SMA is a one second average measurement of the power consumed by the implantable blood pump measured at a predetermined interval for a first predetermined period of time.

14. The system of claim 13 , wherein the predetermined interval is 15 minutes.

15. The system of claim 14 , wherein the first predetermined period of time is 48 hours.

16. The system of claim 13 , wherein calculating the MACD includes calculating a fast moving average (FMA), and wherein the FMA is a one second average measurement of the power consumed by the implantable blood pump measured at the predetermined interval for a second predetermined period of time less the first period of time.

17. The system of claim 16 , wherein the second predetermined period of time is four hours.

18. The system of claim 11 , generating an alert includes at least one from group consisting of sounding an alarm on a controller of the implantable blood pump and displaying a time and date of the alert on a display of a controller of the implantable blood pump.

19. The system of claim 11 , wherein the controller is further configured to clear the alert when the calculated MACD crosses the MACD zero line for the predetermined MACD zero line crossing time threshold.

20. A method of detecting a disruption in a diurnal rhythm of a patient having an implantable blood pump and a diurnal cycle, comprising:

calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump; and

generating an alert when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold, the alert being indicative of a loss of the patient's diurnal cycle, the generating an alert includes at least one from group consisting of sounding an alarm on a controller of the implantable blood pump and displaying a time and date of the alert in a log file of a controller of the implantable blood pump;

correlating the loss of the patient's diurnal cycle to at least one from the group consisting of thrombus and tachycardia; and

clearing the alert when the calculated MACD crosses the MACD zero line for the predetermined MACD zero line crossing time threshold.