The Evaluation of Consistency by Finger Stick Blood Glucose or Venous Blood Glucose of Flash Glucose Monitoring in Different Infiltration Time

This is a prospective randomized controlled study to evaluate consistency by finger stick blood glucose or venous blood glucose in different infiltration time (including the time between activation of the sensor and storage of the first blood glucose value) of Flash glucose monitoring(FGM). In this study, the relationship between the dynamic blood glucose and finger stick blood glucose or venous blood glucose in type 2 diabetes mellitus patients(T2DM), was explored. And the investigators also analyzed the deviation and accuracy of FGM in practical application,so as to provide a good reference for clinical application.