Specimen Requirements



Specimen Requirement

Collect SST/1.0 mL serum, after 30 minutes of clotting, promptly centrifuge and send.

Alternate sample:
Collect lavender EDTA or green top heparin tube, centrifuge, transfer 1.0 mL serum/plasma to a screw top plastic vial, indicate sample type on tube and send.


Spectrophotometry (SP)


Room temp: 72 hours, Refrigerated: 14 days, Frozen: 60 days

Reference Range

The reference range is determined by the performing laboratory and will show on the report.


3-6 days performed Monday-Friday p.m.

Clinical Use

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.

Test Code