Oral glucose tolerance test

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Oral Glucose Tolerance Test

The Oral Glucose Tolerance Test (pronounced: /ˈɔːrəl ˈɡluːkoʊs tɔːlərəns tɛst/), often abbreviated as OGTT, is a medical procedure used to diagnose prediabetes and diabetes. The test measures the body's ability to use glucose, which is the body's main source of energy.

Etymology

The term "Oral Glucose Tolerance Test" is derived from the method of administration and the purpose of the test. "Oral" refers to the route of administration, "glucose" is the substance used in the test, and "tolerance test" refers to the purpose of the test, which is to measure the body's ability to metabolize glucose.

Procedure

The OGTT involves fasting overnight, after which a blood sample is taken to measure the fasting blood glucose level. The patient then consumes a drink containing a known amount of glucose. Blood samples are taken at intervals for up to two hours to measure the blood glucose levels.

Interpretation

The results of the OGTT are interpreted based on the blood glucose levels at the different time points. A normal response is a rise in blood glucose levels followed by a drop to normal levels. If the blood glucose levels remain high, it indicates that the body is not properly metabolizing glucose, which can be a sign of prediabetes or diabetes.

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