Hemoglobin (Hb) A1c With eAG
Also known as: Hgb A1c
Use
Self-monitoring of blood glucose (SMBG) is one of the two primary techniques available for health providers and patients to assess the effectiveness of the management plan on glycemic control in diabetes. SMBG is typically carried out in the form of frequent fingerstick capillary glucose testing. Another more recent technology available is continuous glucose monitoring (CGM) carried out through a sensor that measures interstitial glucose concentration which correlates well with plasma glucose and capillary glucose levels. The second glycemic control technique is measurement of hemoglobin A1c (Hb A1c).
Special Instructions
This relationship applies only to Hb A1c methods certified as traceable to DCCT reference, and is based on overall averages and may vary slightly in individual patients. LabCorp uses a DCCT traceable method.
Limitations
Mean plasma glucose estimates outside of the 5.0% to 15.0% Hb A1c range are not calculated since estimations in the nondiabetic range have not been verified. Only diabetic patients in stable control and without any suggestion of erythrocyte disorders were entered into the study. Children and pregnant women were also excluded; additional data in these groups are needed to confirm the established relationship.
Methodology
Immunoassay (Other)
Biomarkers
LOINC Codes
- 55399-0
- 4548-4
- 27353-2
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
4 mL
Minimum Volume
0.5 mL
Container
Lavender-top (EDTA) tube, green-top (lithium heparin) tube, or gray-top (sodium fluoride) tube
Collection Instructions
The usual precautions in the collection of venipuncture samples should be observed. The sample must be free of clots. Samples with any hematocrit disorders can lead to erroneous results. Send the entire tube to the laboratory.
Storage Instructions
Maintain specimen at room temperature.
Causes for Rejection
Clotted specimen; gross hemolysis
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |