Clinical Study of the Intravenous Blood Glucose System in Hospitalized Adult Elective or Non-Emergent Surgery and Medical/Surgical Intensive Care Unit Patients

Subjects will have their glucose values collected from the IVBG System and compared with paired plasma glucose measurements obtained using theYSI with comparative blood samples collected from a CVC, an arterial line or a peripheral vein. * Blood samples collected per time point: approximately 2ml for waste and1mL for glucose measurement. In the event that a closed blood drawing system is utilized, the waste would be reduced or eliminated. * The comparative blood samples will be drawn manually at a maximum frequency of once every four hours. * Sample draws not to exceed 23 per subject for the duration of the study. This includes 18 comparative blood samples and 5 calibration samples to be draw as needed (e.g. recalibration). Including the partial thromboplastin time (PTT) draws described in section 3.1.2, there would be approximately 100 mL or 6.8 tablespoons drawn per subject. In the case where a closed blood drawing system is used consistently, this would be approximately 50 mL or 3.4 tablespoons per subject. POC meter blood glucose measurements will be performed at the same time as the blood sample draws described above.