What is Fasting Bloog Sugar (FBS) test?
Blood sugar tends to peak after eating and declines later. After fasting, a carbohydrate metabolism test is conducted, which measures blood glucose levels. A blood sample will be taken after an overnight fast. A person can be diagnosed as prediabetic or diabetic on the basis of this test result. Fasting blood sugar levels under 100 milligrams/decilitre (mg/dL) are considered normal. Levels between 100 and 125 mg/dL could indicate prediabetes.
What happens during this test?
To determine compatibility with donated blood before receiving a transfusion of blood or blood components at the time of donating blood, tissue, organ, or bone marrow or getting registered as a potential donor. Or to determine the risk of Rh factor incompatibility between the mother and fetus before pregnancy or during pregnancy.
When to take this test?
</=100 : Normal
100-125 : Pre Diabetes
>/=126 : Diabetes
Cut off for GDM : > 95
Frequency to repeat test
Every 6 months
Precautions to be taken before for the test
Do not eat or drink anything except water at least 10 to 12 hours before the test.
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