This is an automatically translated article.
The article was professionally consulted by a microbiologist - Laboratory Department - Vinmec Central Park International General HospitalAn oral glucose tolerance test is indicated when fasting plasma glucose is 5.5-6.9 mmol/L. Blood glucose level 2 hours after taking glucose has a decisive role in the diagnosis of diabetes. It is one of the important methods to check blood sugar as well as one of the four criteria to accurately diagnose diabetes.
1. What is an oral glucose tolerance test?
The oral glucose tolerance test is a method used to determine the body's ability to use a type of sugar (glucose) as a major source of energy. This test plays a very important role in the diagnosis of pre-diabetes, diabetes and especially to detect gestational diabetes.
Nghiệm pháp dung nạp glucose đường uống nhằm chẩn đoán bệnh đái tháo đường
2. When is a glucose tolerance test ordered?
Glucose tolerance test is indicated for the following cases:
Pregnant women (with specific gestational diabetes) at 24-28 weeks of pregnancy can be ordered in all pregnant women or pregnant women at high risk of gestational diabetes (family history of diabetes, obesity, age over 25 years, having gestational diabetes in a previous pregnancy, previous pregnancy) gave birth to a baby weighing more than 4.1 kg or a stillbirth of unknown cause) Subjects with suspected or known risk factors for type 2 diabetes in adults People with fasting blood glucose levels higher than 126 mg/dL or HbA1c test result greater than 6.5%.
3. How is the oral glucose tolerance test performed?
The steps to perform the test are as follows:
Experiment with taking blood in the morning, the patient should not eat, smoke and exercise within 10-14 hours before taking the first blood sample (measure fasting blood sugar). ) Conduct a fasting blood glucose test (for fasting plasma glucose results) Give the patient 75g of glucose (or 1.75g/kg of body weight up to 75g in children) dissolved in 250- 300ml of water, drink for 5 minutes Experiment to draw blood (quantification of blood glucose) at 1 and 2 hours after drinking glucose water. Notes on conducting the test:
Do not perform the test in patients with established hyperglycemia and typical symptoms of hyperglycemia or 2 fasting glucose samples above 0.7 mmol/L. Not conducted with chronic malnourished, bedridden for 3 days or more. The patient ate completely normally for 3 days before the test. Diuretics, beta-blockers Rest at least 30 minutes before the test. During the whole process before and after the test, do not smoke, drink coffee.
Thực hiện nghiệm pháp dung nạp glucose đường uống được tiến hành bằng xét nghiệm máu trước và sau uống 75g glucose
4. Evaluation of results of oral glucose tolerance test
The patient is diagnosed with diabetes when the plasma glucose result at 2 hours after the test is greater than 200 mg/dL (or 11.1 mmol/L)
The patient is diagnosed with prediabetes when have impaired glucose tolerance: that is, plasma glucose at 2 hours after the oral glucose tolerance test is 140-199 mg/dL (or 7.8-11.1 mmol/L)
Blood glucose disorders are not enough to diagnose diabetes but there is still a risk of large-vessel complications of diabetes called pre-diabetes
Vinmec International General Hospital offers a sieve package Diabetes screening - dyslipidemia is for customers with signs of diabetes, type 2 diabetes for the purpose of diagnosis and screening of diseases based on quantitative blood tests, application of diagnostic tests. oral dose (for customers with doubtful fasting blood sugar results) ...... From there, the doctor will draw conclusions and give advice on disease prevention as well as therapy. appropriate, scientific treatment for the patient.
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