Evaluation of symphony ® CGM: a non-invasive, transdermal continuous glucose monitoring system for use in the critically ill

Following a 1 hour warm-up period, a calibration was performed. Blood samples were obtained from a radial artery catheter approximately every hour, centrifuged to plasma, and glucose was measured using a YSI 2300 STAT Plus Glucose Analyzer (reference BG). A maximum of 30 reference BG samples were collected for each patient. Samples were collected as frequently as every 15 minutes for trend analysis. CGM was prospectively calibrated every 4 hours.