Reading: Diagnosis of Diabetes
Oral Glucose Tolerance Test (OGTT)
research has shown that the OGTT is more sensitive than the FPG test for diagnosing prediabetes, but it is less convenient to administer. The OGTT requires you to fast for at least eight hours before the test. Your plasma glucose is measured immediately before and two hours after you drink a liquid containing 75 grams of glucose dissolved in water system. Results and what they mean are shown in board 2. If your lineage boodle horizontal surface is between 140 and 199 mg/dL 2 hours after drinking the liquid, you have a imprint of prediabetes called impaired glucose tolerance or IGT, meaning that you are more probably to develop type 2 diabetes but do not have it even. A two-hour glucose level of 200 mg/dL or above, confirmed by repeating the quiz on another day, means that you have diabetes. Table 2. Oral Glucose Tolerance Test
|2-Hour Plasma Glucose Result (mg/dL)||Diagnosis|
|139 and below||Normal|
|140 to 199||Prediabetes
(impaired glucose tolerance)
|200 and above||Diabetes*|
* Confirmed by repeating the screen on a unlike day. Gestational diabetes is besides diagnosed based on plasma glucose values measured during the OGTT. Blood sugar levels are checked four times during the test. If your blood boodle levels are above convention at least doubly during the test, you have gestational diabetes. table 3 shows the above-normal results for the OGTT for gestational diabetes.
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Table 3. Gestational Diabetes: Above-Normal Results for the Oral Glucose Tolerance Test
|When||Plasma Glucose Result (mg/dL)|
|Fasting||95 or higher|
|At 1 hour||180 or higher|
|At 2 hours||155 or higher|
|At 3 hours||140 or higher|
note : Some laboratories use other numbers for this test. For extra information about the diagnosis and treatment of gestational diabetes, see the NIDDK booklet What I Need to Know About Gestational Diabetes.
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Random Plasma Glucose Test
A random blood glucose level of 200 mg/dL or more, plus bearing of the pursue symptoms, can mean that you have diabetes :
- Increased urination
- Increased thirst
- Unexplained weight loss
other symptoms include fatigue, confuse vision, increased hunger, and sores that do not heal. Your doctor will check your blood glucose level on another day using the FPG or the OGTT to confirm the diagnosis of diabetes. Newer guidelines use hemoglobin A1c as a screening joyride or diagnostic test for prediabetes or diabetes ( the trial is normally used to measure blood glucose control in diabetes patients over several months ). An HbA1c of 5.7 % to 6.4 % is reproducible with prediabetes and marks a clock when it can be reversed by life style changes. An HbA1c of 6.5 % or higher is coherent with diabetes .