WAYNE, Pa.--(BUSINESS WIRE)--Continuous interstitial glucose monitors (CGM) are medical devices that measure glucose in the interstitial fluid just under the skin. CGM offers the patients the potential of monitoring their glucose and managing insulin levels without repeated finger sticks. Because CGM offers the ability to report trends in glucose levels over time, the development of new evaluation methods for determining the accuracy of CGM devices is necessary. As more manufacturers develop CGM devices, consistent evaluation protocols become more important.