Blood Test : Glucose

Glucose is the main energy source for all body tissues. The food we eat is ultimately broken down into this essential form which is utilized by every living cell. Blood glucose levels can be measured in a number of ways:

* FASTING BLOOD SUGAR - Your doctor will ask you not to eat for a 12-14 hour period before the blood sample is taken. Glucose levels should be within a normal range. A higher level may indicate diabetes. Fasting blood sugar levels are also useful to monitor known diabetics. Approximate NORMAL FASTING GLUCOSE: 70 to 110 milligrams per deciliter of blood.

* TWO HOUR POSTPRANDIAL SUGAR - The blood sample is taken 2 hours after the patient eats a normal meal. This test is useful for monitoring diabetics and regulating their insulin requirements. Approximate NORMAL 2-HOUR POSTPRANDIAL GLUCOSE: 120 to 150 milligrams per deciliter.

* RANDOM BLOOD SUGAR - Drawn at any time, with no special requirements. This test is often done on an emergent basis to evaluate the symptomatic patient (unconscious patient). Approximate normal values vary from 110 to 200.


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