2-hour glucose tolerance test during pregnancy

The glucose tolerance test during pregnancy is basically a routine test that every pregnant woman must undergo, because the glucose tolerance test can effectively infer whether the pregnant woman has gestational diabetes. Gestational diabetes can seriously affect the healthy development of the baby in the belly, so testing glucose tolerance is also a very important test. What happened if abnormal conditions appeared for two hours during the glucose tolerance test during pregnancy?

What to do if the 2-hour glucose tolerance value exceeds the standard

Blood glucose measurement 2 hours after a meal is another important method for diagnosing and detecting diabetes. Clinically, there are many patients whose fasting blood sugar is not high, but their blood sugar increases significantly 2 hours after a meal, and they can also be diagnosed with diabetes. The method is to eat a 2-liang (about 100-gram) steamed bun or 75 grams of glucose in the morning on an empty stomach, and then draw blood to measure blood sugar 2 hours after the meal. If the plasma blood sugar is greater than or equal to 200 mg/dL (11.1 mmol/L), it can be diagnosed as diabetes even if the fasting blood sugar is normal. If the result is <140 mg/dL (7.8 mmol/L), diabetes can be ruled out. If the result is >140mg/dL (7.8mmol/L), a further 75g oral glucose tolerance test is required to make a diagnosis.

A 2-hour post-meal blood sugar test is actually a simplified glucose tolerance test. Because this method requires fewer blood draws than the oral glucose tolerance test, is simple and easy to perform, and is easily accepted by patients, it is the most commonly used method in clinical practice to screen and detect diabetic patients with normal fasting blood sugar. Measuring blood sugar 2 hours after a meal has two meanings: one is for diagnosis, and the other is to observe the recovery of glucose tolerance, thereby reflecting the functional status of the pancreas. If after a period of treatment, fasting blood sugar has returned to normal, but postprandial blood sugar is still high, it often indicates that the patient's glucose tolerance is still poor and insulin secretion is still delayed. If fasting blood sugar is normal and postprandial blood sugar is also normal, it means that the patient has better glucose tolerance and improved pancreatic islet function.

In clinical practice, fasting venous blood glucose is usually measured when diagnosing diabetes. When the venous fasting blood glucose is <5.0mmol/L, diabetes can be ruled out; when the venous fasting blood glucose is >7.0mmol/L and there are clinical symptoms, diabetes can be diagnosed; and when the venous fasting blood glucose is between 5.5 and 7.0mmol/L and diabetes is suspected, a further glucose tolerance test should be performed. The glucose tolerance test is an oral glucose load test used to understand the body's ability to regulate blood sugar after ingesting glucose. Through the glucose tolerance test, abnormal glucose metabolism can be detected early and diabetes can be diagnosed early.

How to do a glucose tolerance test

1. Three days before the glucose tolerance test, you should not control your diet, the carbohydrate content in your daily diet should not be less than 150 grams, and you should maintain normal activities.

2. Drugs that affect this test (drugs that cause blood sugar to increase or decrease) should be discontinued.

3. The patient should not eat for 10 to 14 hours before the test.

4. On the morning of the test, fasting venous blood is drawn and the patient is required to drink 300 ml of sugar water containing 75 g of glucose within 5 minutes. Venous blood is drawn 30 minutes, 1 hour, and 2 hours after drinking the sugar water, and urine is collected for qualitative test of urine sugar. During the entire test, you are not allowed to smoke, drink coffee, tea or eat, and you should sit quietly in a chair.