Hvad circadian tracker (phi+)

Abstract

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.

What is claimed is: 
     
         1 . A method of detecting a disruption of 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;   recording the calculated MACD in a log file; and   correlating when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold to a disruption of the patient's diurnal rhythm.   
     
     
         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 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 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 method further includes correlating the disruption of the patient's diurnal rhythm to at least one from the group consisting of thrombus and tachycardia. 
     
     
         9 . 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   correlate when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold to a disruption of the patient's diurnal rhythm.   
     
     
         10 . The system of  claim 9 , wherein the MACD zero line crossing time threshold is 24 hours. 
     
     
         11 . The system of  claim 9 , 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 measured at a predetermined interval for a first predetermined period of time. 
     
     
         12 . The system of  claim 11 , wherein the predetermined interval is 15 minutes. 
     
     
         13 . The system of  claim 12 , wherein the first predetermined period of time is 48 hours. 
     
     
         14 . The system of  claim 11 , 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 measured at the predetermined interval for a second predetermined period of time less the first period of time. 
     
     
         15 . The system of  claim 14 , wherein the second predetermined period of time is four hours. 
     
     
         16 . A method of detecting a disruption of 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   displaying the calculated MACD in a log file;   correlating when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold to a disruption of the patient's diurnal rhythm; and   correlating the disruption of the patient's diurnal rhythm to at least one from the group consisting of thrombus and tachycardia.