Insertion site monitoring methods and related infusion devices and systems
First Claim
1. A method of operating an infusion device operable to deliver insulin to a body of a patient, the method comprising:
- obtaining, from a sensing arrangement, sensed glucose measurement values of a glucose level in the body of the patient during fasting periods during an initial period after initialization of an infusion set associated with the infusion device;
determining a fasting amount of insulin in the body of the patient during the fasting periods;
determining a reference insulin estimate for achieving a reference glucose value based at least in part on the fasting amount of insulin and the sensed glucose measurement values; and
after the initial period;
obtaining, from the sensing arrangement, an updated glucose measurement value during a subsequent fasting period;
determining a current amount of insulin in the body of the patient;
determining a current insulin estimate for achieving the reference glucose value based at least in part on the current amount of insulin and the updated glucose measurement value; and
generating an insertion site notification based on a relationship between the current insulin estimate and the reference insulin estimate.
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Abstract
Infusion systems, infusion devices, and related operating methods are provided. An exemplary method of operating an infusion device involves obtaining one or more measurement values of a physiological condition in the body of a user during an initial monitoring period and determining a fasting reference value for a metric based on the one or more measurement values. After the initial monitoring period, the method continues by obtaining an updated measurement value during a fasting period, determining a current value for the metric based at least in part on the updated measurement value, and generating a notification in response to a deviation between the current value and the fasting reference value exceeding a threshold indicative of insertion site loss or other loss of effectiveness.
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Citations
8 Claims
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1. A method of operating an infusion device operable to deliver insulin to a body of a patient, the method comprising:
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obtaining, from a sensing arrangement, sensed glucose measurement values of a glucose level in the body of the patient during fasting periods during an initial period after initialization of an infusion set associated with the infusion device; determining a fasting amount of insulin in the body of the patient during the fasting periods; determining a reference insulin estimate for achieving a reference glucose value based at least in part on the fasting amount of insulin and the sensed glucose measurement values; and after the initial period; obtaining, from the sensing arrangement, an updated glucose measurement value during a subsequent fasting period; determining a current amount of insulin in the body of the patient; determining a current insulin estimate for achieving the reference glucose value based at least in part on the current amount of insulin and the updated glucose measurement value; and generating an insertion site notification based on a relationship between the current insulin estimate and the reference insulin estimate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification