oral glucose tolerance test

The glucose tolerance test is a method of checking the body's blood sugar regulation function. Oral Glucose Tolerance Test (OGTT) refers to the oral administration of 75g glucose to patients, and then the blood sugar changes are measured, and the patient's ability to adapt to glucose is observed. After normal human oral glucose, it is quickly absorbed into the blood by the gastrointestinal tract, and the blood glucose level is 30-60 minutes. It reaches a peak, but generally does not exceed 8.9mmol/l (160mg/l). Basic Information Specialist classification: Digestive examination classification: other examinations Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Below normal, found in islet beta cell tumor, anterior pituitary hypofunction, hypothyroidism and so on. Normal value: Fasting: 3.9-6.1 millimoles / liter 60 minutes: 6.7-9.5 millimoles / liter 180 minutes: 3.9-6.1 millimoles / liter Above normal: Above normal, found in diabetes, renal glucosuria. negative: Positive: Tips: Smoking, drinking and drinking coffee are prohibited within 8 hours before the test, but you can drink water when the mouth is dry. Normal value Fasting 3.9 ~ 6.1 mmol / liter (7O ~ 110 mg / dl). 60 minutes 6.7 ~ 9.5 millimol / liter (120 ~ 170 mg / dl). 120 minutes ≤ 7.8 mmol / liter (≤ 140 mg / dl). 180 minutes 3.9 ~ 6.1 mmol / liter (70 ~ 110 mg / dl). Clinical significance Abnormal result Increased tolerance, that is, blood glucose measurement is lower than normal, found in islet β-cell tumor, anterior pituitary hypofunction, hypothyroidism, chronic adrenal insufficiency, and functional (idiopathic) hypoglycemia (supply 2~ Hypoglycemia can occur in 3 hours, and blood glucose drops to a low value). Reduced tolerance, that is, blood glucose measurement is higher than normal, found in diabetes, renal glycosuria. Both urine sugars were positive, but the former tolerance curve was higher than normal and maintained for a long time, while the latter tolerance curve was slightly lower than normal. In addition, impaired glucose tolerance, such as hyperthyroidism, hypercortisolism, chronic pancreatitis, and hepatic glycogen metabolism disorders, is also reduced. In patients with occult diabetes, the fasting blood glucose was normal or slightly higher. After oral administration of glucose, the blood glucose rose sharply >10.1mmol/L, and the peak was advanced. After 2h, it did not fall to the normal level, and the tolerance was decreased, and urine sugar was positive. Need to check the population is prone to hyperglycemia or hypoglycemia, suspected blood glucose disease diagnosis and auxiliary examination Low results may be diseases: high hypothyroidism results may be diseases: diabetes, renal glycodialysis matters Inappropriate people: generally no special population. Taboo before inspection 1. Fasting time: 10-16 hours, starting from 7-9 am. 2. Do not smoke, drink or drink coffee within 8 hours before the test, but drink water when the mouth is dry. 3. Avoid abnormal physical activity, mental stress and various stimuli. 4, such as oral contraceptives, hypoglycemic agents, sodium salicylate, propranolol and certain diuretics, hormones, etc., should be discontinued three days before the test. Requirements for examination: In order to avoid nausea and vomiting, glucose can be diluted to 25% concentration and then ingested. Inspection process The oral glucose tolerance test (OGTT) is the most important method for diagnosing diabetes and impaired glucose tolerance (IGF). In order to improve the sensitivity of OGTT, reduce the analysis error, and improve the accuracy of the area under the glucose curve and the area under the insulin curve, the computer has been used to control the OGTT and calculate the test results. In the OGTT, an insulin infusion system is added, and under the control of the computer, the glucose curve is maintained within the normal curve range, and the degree of insulin resistance is evaluated according to the amount of insulin required. Not suitable for the crowd Generally no taboos. Adverse reactions and risks Generally not.