Draw blood in a SST tube/1.0mL serum. Spin and separate from cells within 4 hours and refrigerate.
Refrigerated 14 days, Frozen 2 months
Evaluate diabetic control, reflecting diabetic control over a shorter time period (2-3 weeks) than that represented by hemoglobin A1c (4-8 weeks). Indicated as an index of longer term control than glucose levels, especially in diabetic subjects with abnormal hemoglobins and in type I diabetes in children.