Final answer:
During an oral GTT, the patient is allowed to consume a carbohydrate-rich diet prior to the test and an oral dose of glucose in water. The test assesses the person's glucose tolerance and can help diagnose diabetes mellitus.
Step-by-step explanation:
During an oral GTT, the patient is allowed to consume:
- Carbohydrate-rich diet for three days prior to the test
- An oral dose of 50-60 grams of glucose in 300 ml of water
An oral GTT involves the measurement of blood glucose levels at regular intervals after the ingestion of a glucose solution. This test helps assess the individual's ability to tolerate glucose and can provide insights into diabetes mellitus. If the test is positive, further investigations, such as Insulin Tolerance Test (ITT) and Glucagon Tolerance Test (GuTT), may be required to determine the type of diabetes.