Hospital blood glucose measurement includes two kinds, one is the biochemical instrument detection of venous plasma glucose, the general price is about 6 yuan, plus the cost of blood draw and test tube, etc., the general total of about 10 yuan. However, the result time is relatively slow, generally taking 2-3 hours to produce the report. This kind of blood glucose is very accurate and can be used as the standard for diagnosing diabetes. The other is computerized blood glucose measurement, which is a small bedside machine to detect the end blood glucose of capillaries, and the hospital generally charges 15 yuan for one measurement. The result is very fast, about 5-15 seconds, but the accuracy is less than that of the plasma glucose from the vein. It is usually used as an indicator to assess the usual blood glucose control for patients who have been diagnosed with diabetes, and this kind of blood glucose meter needs to be calibrated once every six months, and the error can be controlled within 1mmol/L as much as possible.