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Blood Sugar Fasting

Fasting blood glucose: A test to determine how much glucose (sugar) is in a blood sample after an overnight fast. The fasting blood glucose test is commonly used to detect diabetes mellitus. A blood sample is taken in a lab, physician’s office, or hospital. The test is done in the morning, before the person has eaten. The normal range for blood glucose is 70 to 100 mg/dl.

Also Known as: Fasting Blood Sugar, FBS, Fasting Blood Glucose, Blood Sugar Fasting, BSF, BSL

Test Panel: Blood SugarFasting Blood SugarFBSFasting Blood GlucoseFBGFasting Plasma GlucoseFPGBlood GlucoseOral Glucose Tolerance TestOGTTGTTUrine Glucose

Fasting Blood Sugar
Fasting Blood Sugar

Why Get Tested:

When to Get Tested:

  • when you are older than 45 and every three years.
  • When you have risk factors for diabetes.
  • when you have symptoms suggesting high or low blood glucose.
  • During pregnancy.

Test Preparation Needed :

Recommended that you fast (nothing to eat or drink except water) for at least 10 – 12 hours before having a blood glucose test.

Sample Preparation:

  • This test can be done on Serum. The serum should be separated within 30 minutes of collection.
  • The serum can be stored at 25° C for 8 hours and 72 hours at 4 °C.
  • Oxalate blood can also be used. Preservative sodium fluoride may be added.
  • The plasma can be stored at 25 °C for 24 hours (when there is preservative sodium fluoride).

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Normal Values:

  • Adult = 74 to 106 mg/dL (4.5 to 5.9 mmol/L)
  • Children = 60 to 100 mg/dL (3.5 to 5.6 mmol/L)

Raised glucose level (Hyperglycemia) seen in:

  1. Diabetes mellitus, adult and juvenile.
  2. Physiological causes.
    1. Strenuous exercise.
    2. Strong emotions.
    3. Shock and burns.
    4. Infections.
  3. Endocrine disorders.
    1. Thyrotoxicosis
    2. Acromegaly and gigantism.
    3. Pheochromocytoma.
    4. Cushing’s syndrome.
  4. Pancreatic diseases.
    1. Acute and chronic pancreatitis.
    2. Pancreatitis due to mumps.
    3. Cystic fibrosis.
    4. Hemochromatosis.
    5. Pancreatic cancers.
  5. other causes are:
    1. Cerebrovascular accident.
    2. Chronic liver disease.
    3. Chronic renal disease.
    4. Acanthosis nigricans.

Possible References Used

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