A diabetes patient unfastened an instrument from the waist, which was similar in size to a mobile phone. Then the doctor connected the instrument with the computer. After a while, a curve chart recording the blood glucose values of the patient at different times within the past 24 hours came out after being printed. With such detailed blood glucose change monitoring data, the doctor could formulate a more reasonable treatment plan for the patient. The glucometer This magical little device is called Continuous Glucose Monitoring System (CGMS), which has entered clinical application in some medical institutions including the Sixth People's Hospital Affiliated to Shanghai Jiao Tong University. Compared with it, both traditional venous blood drawing and fast blood glucose monitoring instruments for measuring blood glucose have a defect: each time they can only obtain the blood glucose condition of the patient at that moment of testing. Even if examined for several times within one day, it is still to rely on a few limited "moments" to infer the type and severity of patient's carbohydrate metabolic disturbance. It is obviously one-sided to carry out drug therapy based on this.