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HelpTest Code LAB5028 Hemoglobin A1c, Blood Spot
Clinical System Name
Hemoglobin A1c, Blood Spot
Synonyms
HbA1c
Hemoglobin A1c
Glycosylated Hemoglobin
HBA1c DBS
Sample Requirements
Specimen: Capillary blood
Container(s): Dried blood spot card (Whatcom 903 Filter paper)
Preferred Vol: 3 full circles (8 mm each)
Minimum Vol: 1 full circle
Note: See instruction sheet for collection details.
If a patient arrives at any SCH lab asking for this test, please collect the venous HbA1c.
Processing Instructions
Reject due to:
Spin: N
Aliquot: N
Temp: 2 - 8 C
Storage location:
Off-site collection:
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| spotted whole blood | Room temp | 90 d |
| Refrigerated | 90 d | |
| Frozen | 90 d |
Availability
| STAT | Performed | TAT |
|---|---|---|
| N | M-F, day shift | 2-4 d |
Samples received by 16:00 will be resulted the following day.
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Chemistry
Location: Chem East
Phone Number: (206) 987-2617
CPT Codes
83036
Methodology
Method: Immunoassay on Vitros 4600
Analytical Volume: 0.350 mL
Limitations:
Reference Range
ADA guidelines suggest that an HbA1c of <5.7% is normal, 5.7-6.4% is increased risk of diabetes (prediabetes), and >6.4% indicates diabetes.
The DCA Vantage (Point of Care instrument) has a positive bias compared to Ortho Vitros 4600 and BioRad HPLC (gold standard) of approximately 4.8%.