The normal value of glycosylated hemoglobin is less than 6.5%. Simply put, 6.5% of the total number of red blood cells is combined with blood sugar. Because red blood cells are partially updated every day and blood sugar is constantly changing, it can only roughly reflect the difference of blood sugar fluctuation. For example, when glycosylated hemoglobin is 6%, the daily blood sugar may be between 5.5 and 8.5 mmol/L; The corresponding blood sugar of 7% is about 6.8-10.3 mmol/L; The corresponding blood sugar of 8% is 8.1-12.1mol/l, etc.
However, the diagnostic criteria of diabetes are very clear, that is, fasting blood glucose is greater than 7.0mol/L or (and) blood glucose is greater than 1 1. 1mol/L, so glycosylated hemoglobin can only roughly reflect the increase of blood glucose, and the increase cannot reflect an accurate value. Theoretically, the higher the glycosylated hemoglobin, the greater the possibility of developing diabetes.
In addition, there may be differences in the detection methods of glycosylated hemoglobin. Therefore, glycosylated hemoglobin has not been directly used as the diagnostic standard of diabetes in China, but it can provide hints for the occurrence of diabetes, especially when glycosylated hemoglobin is greater than 6.5%, glucose tolerance test can be further carried out to exclude or diagnose diabetes in time.
Blood sugar is managed at different levels, and the standard is:
Normal blood sugar: fasting blood sugar is 3.9-6. 1mmol/L, and blood sugar is 4.4-7.8 mmol/L 2 hours after meals.
Pre-diabetes: 2 hours after meal, the fasting blood glucose was 6. 1-7.0mol/L or 7.8-11.1mol/l.
Diabetes: fasting blood glucose is greater than 7.0 mol/L or 2 hours after meals is greater than11.1mol/L.
To sum up, glycosylated hemoglobin level can be used to judge the quality of disease control and the risk of complications, and it is also an important basis for adjusting medication, but it can not reflect the fluctuation of instantaneous blood glucose level, nor can it be determined whether hypoglycemia has occurred. Therefore, glycosylated hemoglobin (HbA 1c) is not recommended for the diagnosis of diabetes in China. Of course, with the accelerated standardization of detection methods of glycosylated hemoglobin in China, the research on glycosylated hemoglobin is further deepened, and perhaps one day glycosylated hemoglobin can be used as a diagnostic standard for diabetes.