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Glucose Tolerance Test
  Glucose Tolerance Test
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The glucose tolerance test measures the body's ability to metabolize glucose: Patients with untreated diabetes have high blood glucose levels. Glucose tolerance tests are one of the tools used to make the diagnosis of diabetes. Reasons For Use


The oral glucose tolerance test is used to screen pregnant women for gestational diabetes at between 24 and 28 weeks of pregnancy. It may also be used to diagnose diabetes in cases where the disease is suspected despite a normal fasting blood glucose.

Directions
The most common glucose tolerance test is the oral glucose tolerance test (OGTT). For adults, the test requires that the patient fast overnight, and then consume 100gm of glucose in water. Blood sugar measurements are then made at 1/2, 1, 2, 3, 4, 5 and 6 hour intervals after ingestion of the glucose load. Insulin levels may also be measured.

For infants and children the preparation depends on various factors such as the child's age.





Glucose Tolerance Test can help with the following:
Metabolic  Hypoglycemia
 The six hour oral glucose tolerance test is normally used to determine the type and magnitude of the glucose intolerance.


KEY
Highly recommended


GLOSSARY

Diabetes Mellitus (Diabetes, Diabetic, Diabetics)
A disease with increased blood glucose levels due to lack or ineffectiveness of insulin. Diabetes is found in two forms; insulin-dependent diabetes (juvenile-onset) and non-insulin-dependent (adult-onset). Symptoms include increased thirst; increased urination; weight loss in spite of increased appetite; fatigue; nausea; vomiting; frequent infections including bladder, vaginal, and skin; blurred vision; impotence in men; bad breath; cessation of menses; diminished skin fullness. Other symptoms include bleeding gums; ear noise/buzzing; diarrhea; depression; confusion.

Gestational Diabetes
Gestational diabetes is defined as any degree of glucose intolerance with the onset or first recognition occurring during pregnancy. Many pregnant women do not notice any symptoms of diabetes, but urine and blood tests may show that they have it. Symptoms of diabetes may include thirst, weight loss, eating too much, urinating in large quantities and unexplained fatigue.

Glucose
A sugar that is the simplest form of carbohydrate. It is commonly referred to as blood sugar. The body breaks down carbohydrates in foods into glucose, which serves as the primary fuel for the muscles and the brain.

Gram (gm, gms, Gramme, Grammes, Grams)
A metric unit of weight, there being approximately 28 grams in one ounce.

Insulin
A hormone secreted by the pancreas in response to elevated blood glucose levels. Insulin stimulates the liver, muscles, and fat cells to remove glucose from the blood for use or storage.

Metabolism (Metabolic, Metabolize, Metabolizes, Metabolizing)
The chemical processes of living cells in which energy is produced in order to replace and repair tissues and maintain a healthy body. Responsible for the production of energy, biosynthesis of important substances, and degradation of various compounds. Also defined as the sum total of changes in an organism in order to achieve a balance (homeostasis): Catabolic burns up, anabolic stores and builds up; the sum of their work is metabolism.




Last updated: Oct 08, 2008


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