The blood glucose test is ordered to measure the amount of glucose in the blood right at the time of sample collection. It is used to detect both hyperglycemia and hypoglycemia, to help diagnose diabetes, and to monitor glucose levels in persons with diabetes. Blood glucose may be measured on a fasting basis (collected after an 8 to 10 hour fast), randomly (anytime), post prandial (after a meal), and/or as part of an oral glucose tolerance test (OGTT / GTT). To Prepare • Do not eat or drink anything, including water, after midnight before the test (6h). This includes. | Fasting blood glucose The blood glucose test is ordered to measure the amount of glucose in the blood right at the time of sample collection. It is used to detect both hyperglycemia and hypoglycemia to help diagnose diabetes and to monitor glucose levels in persons with diabetes. Blood glucose may be measured on a fasting basis collected after an 8 to 10 hour fast randomly anytime post prandial after a meal and or as part of an oral glucose tolerance test OGTT GTT . To Prepare Do not eat or drink anything including water after midnight before the test 6h . This includes coffee gum candy and mints. Do not smoke after midnight before the test. If you are to take your medicines the morning of the test take them with sips of water only. During the Test A blood sample is taken with a needle from your arm. Normal Results Levels vary according to the laboratory but in general up to 100 milligrams per deciliter mg dL are considered normal. Persons with levels between 100 and 126 mg dL may have impaired fasting glucose or prediabetes. These levels are considered to be risk factors for type 2 diabetes and its complications. Diabetes is typically diagnosed when fasting blood glucose levels are 126 mg dL or higher. Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results. What Abnormal Results Mean Greater than normal levels hyperglycemia may indicate Acromegaly very rare Cushing syndrome rare Diabetes mellitus Impaired fasting glucose also called prediabetes Hyperthyroidism Pancreatic cancer Pancreatitis Pheochromocytoma very rare Too little insulin Too much food Fasting Blood Glucose From 70 to 99 mg dL to mmol L - Normal fasting glucose From 100 to 125 mg dL to mmol L - Impaired fasting glucose prediabetes 126 mg dL mmol L and above on more than one testing occasion - .
