The normal range of blood glucose two hours after a meal should be less than 7.8 mmol/L. But 10.6 mmol/L is also not diagnostic of diabetes, and we have to look at fasting blood glucose levels, and it is not reliable to have a single blood glucose, but that blood glucose level is not normal.
Whether the blood glucose is normal or not we need to know the normal range of blood glucose first. The body’s plasma glucose level after 8 hours of fasting is between 3.9 and 6.1 mmol/L. The blood glucose level two hours after a meal should be less than 7.8 mmol/L. Random blood glucose should be less than 11.1 mmol/L. Anything above this range is considered abnormal blood glucose, and abnormal blood glucose disease is present. However, specific diseases need to be analyzed.
First, we look at fasting blood glucose values. If the fasting blood glucose <6.1 mmol/L and the two-hour postprandial blood glucose 7.8-11.1 mmol/L is diagnosed as hypoglycemia. If fasting blood glucose is between 6.1-7.0 mmol/L and two-hour postprandial blood glucose 7.8-11.1 mmol/L then hypoglycemic tolerance and impaired fasting glucose regulation are both considered to be present. A fasting glucose>7.1 mmol/L is diagnostic of diabetes regardless of the postprandial glucose level.
In addition, with a single abnormal blood glucose, we need to be aware of the effect of error. There are many factors that affect the value of blood glucose testing, such as the emergency state of the body, which can cause high blood glucose values. The first of these is the use of a blood test for plasma glucose, and the second is the use of a peripheral blood test. The two tests are not identical, and the fasting and two-hour postprandial glucose should be rechecked.
In summary, a blood glucose value of 10.6 mmol/L after excluding test errors is considered abnormal, but other tests should be performed to determine whether diabetes is present.