PERSONALIZED CLOSED LOOP OPTIMIZATION SYSTEMS AND METHODS
Techniques disclosed herein involve automatically adjusting a control parameter for an operating mode of a medical device. In some embodiments, the techniques involve determining a value for the control parameter using data pertaining to a physiological condition of a patient by disproportionately penalizing a physiological parameter when it is below a target range in comparison to when the physiological parameter is above the target range.
1 . A method of automatically adjusting a control parameter for an operating mode of a medical device, the method comprising:
determining a value for the control parameter using data pertaining to a physiological condition of a patient by disproportionately penalizing a physiological parameter when it is below a target range in comparison to when the physiological parameter is above the target range; and
controlling fluid delivery of the medical device to deliver fluid to the patient according to the control parameter at the determined value.
2 . The method of claim 1 , wherein disproportionately penalizing comprises penalizing for an amount of time the physiological parameter is below a lower bound of the target range more than for an amount of time the physiological parameter is above a higher bound of the target range.
3 . The method of claim 1 , further comprising normalizing an amount of time that the physiological parameter is below a lower bound of the target range, wherein disproportionately penalizing comprises utilizing the normalized amount of time that the physiological parameter is below the lower bound of the target range.
4 . The method of claim 3 , wherein normalizing the amount of time that the physiological parameter is below the lower bound of the target range comprises applying a plurality of normalization factors selected to balance a safety risk associated with time that the physiological parameter is below the lower bound of the target range and a safety risk associated with time that the physiological parameter is outside of the target range.
5 . The method of claim 1 , wherein determining the value for the control parameter comprises:
determining a plurality of candidate values for the control parameter;
determining a plurality of costs corresponding to the plurality of candidate values using a cost function; and
selecting the determined value based on the plurality of costs.
6 . The method of claim 5 , wherein determining a respective cost associated with a candidate value of the plurality of candidate values comprises determining a simulated profile of the physiological condition.
7 . The method of claim 6 , further comprising determining an amount of time the physiological parameter is below a lower bound of the target range and an amount of time the physiological parameter is outside of the target range based on the simulated profile of the physiological condition.
8 . The method of claim 6 , wherein the simulated profile of the physiological condition is determined using a patient-specific physiological simulation model.
9 . The method of claim 1 , wherein the value for the control parameter is determined by a device other than the medical device.
10 . The method of claim 1 , wherein the target range is a target glucose range.
11 . A system for automatically adjusting a control parameter for an operating mode of a medical device, the system comprising:
one or more processors; and
one or more processor-readable storage media storing instructions which, when executed by the one or more processors, cause performance of:
determining a value for the control parameter using data pertaining to a physiological condition of a patient by disproportionately penalizing a physiological parameter when it is below a target range in comparison to when the physiological parameter is above the target range; and
controlling fluid delivery of the medical device to deliver fluid to the patient according to the control parameter at the determined value.
12 . The system of claim 11 , wherein disproportionately penalizing comprises penalizing for an amount of time the physiological parameter is below a lower bound of the target range more than for an amount of time the physiological parameter is above a higher bound of the target range.
13 . The system of claim 11 , wherein the instructions further cause performance of normalizing an amount of time that the physiological parameter is below a lower bound of the target range, wherein disproportionately penalizing comprises utilizing the normalized amount of time that the physiological parameter is below the lower bound of the target range.
14 . The system of claim 13 , wherein normalizing the amount of time that the physiological parameter is below the lower bound of the target range comprises applying a plurality of normalization factors selected to balance a safety risk associated with time that the physiological parameter is below the lower bound of the target range and a safety risk associated with time that the physiological parameter is outside of the target range.
15 . The system of claim 11 , wherein determining the value for the control parameter comprises:
determining a plurality of candidate values for the control parameter;
determining a plurality of costs corresponding to the plurality of candidate values using a cost function; and
selecting the optimized value based on the plurality of costs.
16 . The system of claim 15 , wherein determining a respective cost associated with a candidate value of the plurality of candidate values comprises determining a simulated profile of the physiological condition.
17 . The system of claim 16 , wherein the instructions further cause performance of determining an amount of time the physiological parameter is below a lower bound of the target range and an amount of time the physiological parameter is outside of the target range based on the simulated profile of the physiological condition.
18 . The system of claim 16 , wherein the simulated profile of the physiological condition is determined using a patient-specific physiological simulation model.
19 . The system of claim 11 , wherein the value for the control parameter is determined by a device other than the medical device.
20 . A method of automatically adjusting a control parameter for an operating mode of a medical device, the method comprising:
determining a value for the control parameter using simulated values of the control parameter by disproportionately penalizing a physiological parameter when it is below a target range in comparison to when the physiological parameter is above the target range.