Hemoglobin (Hb) A1c With eAG

Casandra

Casandra Test Code LC79244Version 1 (DRAFT)

Performing Lab

Lab LabcorpLab Test ID 102525CPT Code 83036

Hemoglobin (Hb) A1c With eAG

Also known as: Hgb A1c

Clinical Use

Order Test

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.

Test Details

Methodology

Immunoassay (Other)

Biomarkers

Estimated Average Glucose

Analyte

Estimated Average Glucose • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Hemoglobin A1c

Analyte

Hemoglobin A1c • Concentration / Level • Categorical (e.g., Positive / Negative / Indeterminate)

LOINC Codes

Order Codes

55399-0

Result Codes

4548-4
27353-2

Result Turnaround Time

1 day

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.