Continuous glucose monitoring: A review of the technology and clinical use

•RCTs have shown that CGM can reduce A1c and time spent in hypoglycemia.•CGM can help clarify A1c readings that do not match corresponding SMBG records. ​•CGM provides trend data about the direction and rate of changing glucose levels.•Patient education and increased sensor wear time increase the effectiveness of CGM. ​•Data confidentiality and integrity necessitate sound cybersecurity practices.