Why is a blood sugar test done?
is diagnosed based on a high level of glucose
(sugar) in the blood. Blood sugar test, done fasting and 2 hours after breakfast, is used for the diagnosis of diabetes.
How is the test done?
Fasting blood glucose: In this test, a person is asked to fast overnight, at least 8 hours, and the level of glucose in the blood is then checked.Post prandial (PP) blood glucose: This is tested two hours after having ameal. It serves as a challenge for the body to regulate the blood sugarafter a meal. Random blood sugar or glucose test is that which is done at any other time. The blood glucose can also be tested after giving 75 gm glucose by mouth (glucose challenge test). This is useful for detecting borderline diabetes
and a condition called "impaired glucose tolerance".Blood glucose tests are also needed for checking the control in diabetes.
What are the normal values?
Normal fasting plasma glucose levels are less