The FDA has approved the Minimed 670G (Medtronic), a hybrid closed-loop insulin delivery system for use in patients ≥14 years old with type 1 diabetes. The system uses an algorithm to automatically adjust basal insulin doses based on readings from a continuous glucose monitor (CGM). It fully automates basal insulin delivery in "auto" mode, but is considered a "hybrid" system (not a true "artificial pancreas") because it requires some action by the patient. The 670G system is expected to become available in Spring 2017.

The FDA has approved the MiniMed 530G (Medtronic), an insulin pump used in combination with a continuous glucose monitoring sensor (Enlite) that can stop delivery of insulin when interstitial glucose reaches a prespecified low level. It is the only sensoraugmented insulin pump available in the US with this capability.

A variety of continuous glucose monitoring (CGM) devices have been used in an effort to reduce the hypoglycemia and wide glucose excursions that complicate insulin treatment of diabetes. Since the last Medical Letter issue reviewing such devices, some new devices and some new data on old devices have become available. The devices currently marketed in the US for personal use are listed in Table 1.

A variety of glucose monitoring devices have been used in an effort to reduce the hypoglycemia and wide glucose excursions that complicate insulin treatment of diabetes. Since the last Medical Letter issue reviewing such devices, more continuous glucose monitoring (CGM) systems have become available. Five devices available now, and two expected to be marketed soon, are listed in the table on page 14. The FDA has approved continuous glucose devices only for the observation of glucose trends.

Improved glucose meters and 2 sensing systems for continuous monitoring have become available for management of diabetes.

An automatic, noninvasive, glucose-monitoring device (GlucoWatch Biographer) has been approved for marketing by the FDA. The manufacturer states that it is not meant to replace a regular blood glucose meter.