Normal values ​​for a glucose tolerance test

The purpose of the glucose tolerance test is to confirm whether a woman has gestational diabetes. So do you have a clear understanding of how much the glucose tolerance test for pregnant women is worth? Let us explain the relevant situation to you below.

Standard values ​​for glucose tolerance tests in pregnant women

Normally, the blood sugar level rises rapidly within 1/2 to 1 hour after taking sugar, and returns to the fasting level after 2 hours. If it does not return to the normal level within 2 hours after taking sugar, and the urine sugar is positive, it means impaired glucose tolerance.

Standard value of glucose tolerance for pregnant women (75g OGCT):

1. Fasting blood sugar. Standard value range: ≤5.1mmol/L

2. Blood sugar level after 1 hour. Standard value range: ≤10.b250mol/L

3. Blood sugar level after 2 hours. Standard value range: ≤8.5mmol/L

Abnormal risk: If the value of any one of the above three items reaches or exceeds the critical point, gestational diabetes can be diagnosed.

Glucose tolerance test method

1. Before the test, the daily carbohydrate intake should be no less than 150g, and there should be normal physical activity for at least 3 days.

2. Stay fasting for 10-14 hours.

3. Do not consume alcohol, freshly ground coffee or tea before the inspection and keep your emotions stable.

4. Draw blood from your stomach before 8:30 in the morning, then drink 250-300ml of water containing 75g of glucose within 5 minutes (if your fasting blood sugar is >15.b250mol/L or you have type 1 diabetes and are prone to ketosis, replace it with 100g of wheat flour steamed bun and eat it within 10-15 minutes).

5. Take blood samples 0.5 hours, 1 hour, 2 hours, and 3 hours after drinking red bean soup or eating steamed buns to measure postprandial blood sugar.

Clinical manifestations of glucose tolerance test

The practical significance of glucose tolerance tests for pregnant women during pregnancy is to diagnose diabetes, understand the range of blood sugar fluctuations, and analyze the stability level of diabetes.

It should be noted that the blood sugar level of pregnant women with gestational diabetes after giving birth will be slightly different from that of ordinary people. The World Health Organization (WHO) has the following diagnostic criteria for diabetes:

1. Have symptoms of diabetes. Diabetes can be diagnosed if any of the following conditions are present: fasting blood sugar ≥ 7.8mmol/L; blood sugar level ≥ 11.1mmol/L at any time of the day; fasting blood sugar < 7.8mmol/L, but blood sugar level after taking 75g of red grapes for a glucose tolerance test 2 hours later > 11.1mmol/L.

2. No symptoms of diabetes. Diabetes can be diagnosed if any of the following conditions are present: fasting blood sugar ≥ 7.8mmol/L for two times; blood sugar levels ≥ 11.1mmol/L at 1 and 2 hours after the first oral 75g grape glucose tolerance test, blood sugar levels ≥ 11.1mmol/L at 2 hours after a repeated grape glucose tolerance test, or fasting blood sugar ≥ 7.8mmol/L for repeated times.

3. Impaired glucose tolerance. Fasting blood glucose <7.8mmol/L, blood glucose level between 7.8 and 11.1mmol/L 2 hours after taking 75g of glucose orally.

The diagnosis of gestational diabetes refers to the above criteria. Fetuses of diabetic pregnancies often have congenital malformations before 7 weeks of embryonic development, so early diagnosis and treatment before pregnancy is very important.

Clinical symptoms of gestational diabetes

1. Typical symptoms: three more and one less (drinking more, eating more, urinating more and losing weight). During pregnancy, vulvar itching, vaginal and private parts Trichomonas infection may also occur, and ketoacidosis with coma may occur when the disease is severe.

2. Impaired glucose tolerance during pregnancy: no symptoms of "three more and one less". Severe vomiting during early pregnancy, or a history of Trichomonas infection, abnormal fasting blood sugar test or positive urine sugar, family history of diabetes, or poor pregnancy history and abnormalities during this pregnancy that were not detected during a glucose tolerance test