Hemoglobin A1C
| Order Code: | A1C |
| Epic Lab Code: | LAB90 |
| Order Form: | A-1a General Lab or Epic Req |
Chemistry
6240 RCP
356-3527
6240 RCP
356-3527
Specimen:
Whole Blood
Collection Medium:
 |
| Lavender top tube 3 mL (EDTA) |
Alternate
Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
3 mL; lavender top or 2 lavender microtubes for pediatrics
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Analytic Time:
1 hour (upon receipt in laboratory)
Reference Range:
4.8 - 6.0%
Glycemic control guidelines: Non-diabetic <6% Goal <7% Therapeutic action >8%
Test
Limitations:
Rheumatoid factor less than 750 IU/mL and ascorbic acid less than 50
mg/dL do not interfere.
In hemolytic anemia and iron deficiency anemia, the average age of
erythrocytes is altered. Caution should be used when interpreting the
HbA1c results from patients with these conditions (2, 3).
This assay is not useful in judging day-to-day glucose control and
should not be used to replace daily home testing of urine and blood
glucose.
References:
(1) Glick MR, Ryder KW, Jackson SA. Graphical Comparisons of
Interferences in Clinical Chemistry Instrumentation. Clin Chem
1986;32:470-474.
(2) Greiling H, Gressner AM, eds. Lehrbuch der Klinischen Chemie und
Pathobiochemie, 3rd ed. Stuttgart/New York: Schattauer, 1995:279.
(3) Bessis M. Living Blood Cells and their Ultrastructure. Berlin:
Springer-Verlag; 1973.
Methodology:
Turbidometric Immunoinhibition
CPT Code:
83036