General
Synonym/Acronym:
Blood sugar, fasting blood sugar (FBS), postprandial glucose, 2-hr PC.
Common Use:
To assist in the diagnosis of diabetes and to evaluate disorders of carbohydrate metabolism such as malabsorption syndrome.
Specimen:
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.
Normal Findings:
(Method: Spectrophotometry)
| Age | Conventional Units | SI Units (Conventional Units × 0.0555) |
|---|
| Fasting | | |
| 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
If you are a registered user, please login below.
If not, learn more about gaining full access.
- Login
- Try and Buy
- Nursing Central puts five fully integrated references at your fingertips on mobile devices and the web. See how Nursing Central works by clicking the sample entries below or purchase a subscription for the web and your mobile device.
View these free topics online now.
![[Top]](images/m/top.gif)
CrossLinks