Effectiveness and Safety Study of the Dexcom G4™ Continuous Glucose Monitoring System

The primary objective is to characterize the System performance with respect to laboratory reference venous sample measurements. The device performance will be primarily evaluated in terms of point and rate accuracy of the G4 System in reference to YSI. The trend accuracy of the device performance, i.e., continuous glucose error grid analysis, will be evaluated as well as the temporal G4 System accuracy at different glucose rates of changes and different glucose ranges (hypoglycemic, euglycemic, and hyperglycemic ranges). The primary matched paired (Sensor-YSI) measurements will be collected during multiple in-clinic days.