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Keywords/Mnemonics: A1c Hemoglobin, A1c
1 purple top plasma (EDTA) tube filled. Invert gently 8 times immediately after collection to prevent clotting. Send purple top tube (minimum volume 2.0 mL) whole blood, ambient temperature. Samples are stable at room temperature for 1 day. If there is a delay in transport of 8 hour or more, refrigerate. Whole blood specimens may be stored up to 7 days at 2-8 degrees C
Mean Plasma Glucose = (35.6*HgbA1c) - 77.3 reported for HbA1c values between 6-12%.
Note: The above guidelines may be used for interpretation of results. However, factors such as duration, adherence to therapy, and the age of the patient should be considered in assessing the degree of blood glucose control.
Goal of therapy: HbA1C of 7.0% or less.
Interpretation of HbA1C: It is an index of mean plasma glucose over the past 1-3 months. The HbA1c is weighted to the most recent glucose values.
A 17% change in HbA1c result reflects a change of about 30 mg/dL in average plasma glucose.
Specimen not refrigerated and older than 1 day.
View test details, including specimen collection, patient preparation & reference ranges.
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