Hemoglobin A1c
| Abbrev Code: | GLYHB | ||
| Order Code: | LAB90 | Order Name: | Hemoglobin A1c |
| Synonyms: | Glycohemoglobin; Glycated Hemoglobin; Glycosylated Hemoglobin | ||
| Methodology: | Roche: Turbidmetric inhibition immunoassay (TINIA)
Vista: Turbidmetric and colorimetric Architect: Enzymatic |
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| CPT Codes: | 83036 x1, 83036 x1 | ||
| Turnaround Time: | Performed and reported 24 hours/day. | ||
| Associated Links: | |||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2.5 mL |
| Minimum\Peds Volume: | 1.0 mL |
| Container: | Purple (EDTA) |
| Causes for Rejection: | Frozen specimens |
| Contraindications: | Not useful more often than at 4-6 week intervals. Low hemoglobin may cause falsely decreased results. |
Processing and Shipping
| Specimen Processing: | Do not centrifuge. Store in refrigerator. |
| Shipping Instructions: | Ship refrigerated to arrive within 7 days of specimen collection. |
| Stability: | Roche: 3 days at room temperature; 7 days refrigerated; 6 months frozen.
Vista: 8 hours at room temperature; 7 days refrigerated. |
| Test Performed at or Referral Lab | Chemistry (CSC Maple Grove, Roche-Lakes, Roche-Northland, Roche-Range, Roche-Ridges, Roche-Southdale, Roche-St. John's, Roche-UMMC East, Roche-UMMC West) |
Interpretive
| Reference Range: |
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| Use: | Assess glycemic control in all people with diabetes mellitus. This method uses TTAB (Tetradecyltrimethylammonium bromite) as the detergent in the hemolyzIng reagent to eliminate interference from leukocytes (TTAB does not lyse leukocytes). Sample pretreatment to remove labile HbA1c is not necessary. |
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