When is the intermittent use of a continuous glucose monitor (CGM) indicated in the treatment of type 1 diabetes mellitus (DM)?

Updated: Oct 08, 2021
  • Author: Romesh Khardori, MD, PhD, FACP; Chief Editor: George T Griffing, MD  more...
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Guidelines from the Endocrine Society [120] recommend the use of real-time CGMs in adult patients with type 1 DM who have demonstrated that they are able to use these devices on a nearly daily basis. The guidelines suggest the intermittent use of CGM systems for short-term retrospective analysis in the following cases [120] :

  • Patients with suspected nocturnal hypoglycemia, dawn phenomenon, or postprandial hyperglycemia

  • Patients with hypoglycemic unawareness

  • Patients experimenting with important changes to their diabetes regimen (eg, instituting new insulin or switching from multiple daily injections to pump therapy)

The 2018 edition of the ADA’s Standards of Medical Care in Diabetes recommends that continuous glucose monitoring be used in all persons aged 18 years or older with type 1 DM (down from the previously recommended age of 25 years or above) in whom glycemic targets are unmet. [121]

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