GTT Full Form- Glucose Tolerance Test

What is GTT? The full form of GTT is the Glucose Tolerance Test. 

The glucose tolerance test, sometimes referred to as the oral glucose tolerance test, gauges how your body reacts to glucose, or sugar. Type 2 diabetes can be detected by the glucose tolerance test. A modified glucose tolerance test is more frequently used to diagnose gestational diabetes, a form of the disease that appears during pregnancy. 

The goal of the glucose tolerance test is to detect problems in your body's post-meal glucose handling, frequently before your fasting blood glucose level deviates from normal. There are very few hazards involved with taking a blood sample. You can bleed or bruise after having your blood drawn. 

Additionally, you can feel lightheaded or dizzy. After your surgery, infection is possible in certain instances.

How is GTT Performed?

The oral glucose tolerance test (OGTT) is the most widely used glucose tolerance test. You will have to fast for at least eight hours before the test starts in order for a blood sample to be taken. After that, you'll be required to consume a liquid that typically contains 75 grams of glucose. Once you consume the solution, your blood will be drawn again every 30 to 60 minutes. Up to three hours may pass during the test.

The intravenous (IV) glucose tolerance test is a test that is comparable (IGTT). It is never used to diagnose diabetes and is rather infrequently used. One variation of the IGTT involves a three-minute intravenous glucose injection. Before the injection, as well as one and three minutes following the injection, blood insulin levels are monitored. The time frame could change. Almost always, this IGTT is just used for research.

After consuming the glucose drink, both glucose and growth hormone are evaluated using a similar technique that is used to diagnose growth hormone excess, or acromegaly.