Analyte sensor calibration management

An apparatus, comprising:

• a processing unit;
• and
• a memory operatively coupled to the processing unit, the memory storing instructions which, when executed by the processing unit, causes the processing unit to:
• determine an immediate sensitivity value associated with an analyte sensor;
• retrieve a prior immediate sensitivity value associated with the analyte sensor;
• determine whether a first variance between the determined immediate sensitivity value and the retrieved prior immediate sensitivity value is within a first predetermined sensitivity range;
• retrieve a prior composite sensitivity value when it is determined that the first variance is not within the first predetermined sensitivity range, wherein the prior composite sensitivity value includes two prior timed spaced sensitivity values;
• determine whether a second variance between the determined immediate sensitivity value and the retrieved prior composite sensitivity value is within a second predetermined sensitivity range;
• and
• assign a successful calibration sensitivity value based on the retrieved prior composite sensitivity value when the second variance is within the second predetermined sensitivity range.

An analyte monitoring system, comprising:

• a transcutaneously positionable analyte sensor for monitoring an analyte level;
• an analyte monitoring device operatively coupled to the analyte sensor for receiving signals from the analyte sensor associated with the monitored analyte level;
• and
• a data processing unit coupled to the analyte monitoring device, the data processing unit configured to:
• determine an immediate sensitivity value associated with the analyte sensor;
• retrieve a prior immediate sensitivity value associated with the analyte sensor;
• determine whether a first variance between the determined immediate sensitivity value and the retrieved prior immediate sensitivity value is within a first predetermined sensitivity range;
• retrieve a prior composite sensitivity value when it is determined that the first variance is not within the first predetermined sensitivity range, wherein the prior composite sensitivity value includes two prior timed spaced sensitivity values;
• determine whether a second variance between the determined immediate sensitivity value and the retrieved prior composite sensitivity value is within a second predetermined sensitivity range;
• and
• assign a successful calibration sensitivity value based on the retrieved prior composite sensitivity value when the second variance is within the second predetermined sensitivity range.