Blood sugar, fasting blood sugar (FBS), postprandial glucose, 2-hr PC.
To assist in the diagnosis of diabetes and to evaluate disorders of carbohydrate metabolism such as malabsorption syndrome.
Serum (1 mL) collected in a red- or tiger-top tube, although plasma is recommended for diagnosis of diabetes. Plasma (1 mL) collected in a gray-top (sodium fluoride) or a green-top (heparin) tube.
|Age||Conventional Units||SI Units (Conventional Units × 0.0555)|
| Cord blood||45–96 mg/dL||2.5–5.3 mmol/L|
| Premature infant||20–80 mg/dL||1.1–4.4 mmol/L|
| Newborn 2 days–2 yr||30–100 mg/dL||1.7–5.6 mmol/L|
| Child||60–100 mg/dL||3.3–5.6 mmol/L|
| Adult-older adult||Less than 100 mg/dL||Less than 5.6 mmol/L|
| Prediabetes or impaired fasting glucose||100–125 mg/dL||5.6–6.9 mmol/L|
|2-hr postprandial||65–139 mg/dL||3.6–7.7 mmol/L|
|Prediabetes or impaired 2–hr sample||140–199 mg/dL||7.8–11 mmol/L|
|Random||Less than 200 mg/dL||Less than 11.1 mmol/L|
|The American Diabetes Association and National Institute of Diabetes and Digestive and Kidney Diseases consider a confirmed fasting blood glucose greater than 126 mg/dL to be consistent with a diagnosis of diabetes. Values tend to increase in older adults.|
Glucose has been found in Davis's Lab & Diagnostic Tests
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