COST FUNCTION FOR RESPONSE ALGORITHM
A controller for an implantable blood pump includes processing circuitry configured to initiate a suction response algorithm if a combination of a number of detected suction events multiplied by a suction event variable and a number of non-suction events multiplied by a non-suction event variable exceed a predetermined threshold.
1 . A controller for an implantable blood pump, comprising:
processing circuitry configured to initiate a suction response algorithm if:
a combination of a number of detected suction events multiplied by a suction event variable and a number of non-suction events multiplied by a non-suction event variable exceed a predetermined threshold.
2 . The controller of claim 1 , wherein the predetermined threshold is at least one.
3 . The controller of claim 1 , wherein the suction event variable is less than one.
4 . The controller of claim 3 , wherein the suction event variable is 0.2.
5 . The controller of claim 1 , wherein the non-suction event variable is less than one.
6 . The controller of claim 5 , wherein the non-suction event variable is 0.05.
7 . The controller of claim 1 , wherein each detected suction event and non-suction event is determined over a one-second time period.
8 . The controller of claim 1 , wherein the suction response algorithm is initiated if the combination of a number of detected suction events multiplied by a suction event variable and a number of non-suction events multiplied by a non-suction event variable exceed a predetermined threshold during a predetermined time interval.
9 . The controller of claim 8 , wherein the predetermined time interval is 30 seconds.
10 . The controller of claim 1 , wherein the combination of a number of detected suction events multiplied by a suction event variable and a number of non-suction events multiplied by a non-suction event variable is at least zero.
11 . A method of operating an implantable blood pump, comprising:
initiating a suction response algorithm if a combination of a number of detected suction events multiplied by a suction event variable and a number of non-suction events multiplied by a non-suction event variable exceed a predetermined threshold.
12 . The controller of claim 11 , wherein the predetermined threshold is at least one.
13 . The controller of claim 11 , wherein the suction event variable is less than one.
14 . The controller of claim 13 , wherein the suction event variable is 0.2.
15 . The controller of claim 11 , wherein the non-suction event variable is less than one.
16 . The controller of claim 15 , wherein the non-suction event variable is 0.05.
17 . The controller of claim 11 , wherein each detected suction event and non-suction event is determined over a one-second time period.
18 . The controller of claim 11 , wherein the suction response algorithm is initiated if the combination of a number of detected suction events multiplied by a suction event variable and a number of non-suction events multiplied by a non-suction event variable exceed a predetermined threshold during a predetermined time interval.
19 . The controller of claim 18 , wherein the predetermined time interval is 30 seconds.
20 . A controller for an implantable blood pump, comprising:
processing circuitry configured to initiate a suction response algorithm if:
a combination of a number of detected suction events multiplied by a suction event variable less than one and a number of non-suction events multiplied by a non-suction event variable less than one and less than the suction event variable exceed a predetermined threshold, each detected suction event and non-suction event being determined over a one-second interval.