Nearly 90% of diabetes management in the United States is provided by primary care clinicians; diabetes is the fifth most common reason for a primary care visit. State-of-the-art technology such as continuous glucose monitors (CGMs) will inevitably transform the management of diabetes in primary care. Clinicians and staff must be ready to educate, counsel, and support primary care patients in the use of CGMs.
CGMs (also called glucose sensors) are small, minimally invasive devices that attach to the skin of the upper arm or trunk. A tiny electrode in the subcutaneous space prompts an enzyme reaction that measures the interstitial (rather than blood) glucose concentration, typically every 5 minutes. The results are displayed on an accompanying reader or transmitted to an app on the user’s mobile phone.
CGMs could eliminate the need for finger-stick blood glucose testing, which until now, has been the much-despised gold standard for self-monitoring of glucose levels in diabetes. Despite being relatively inexpensive and accurate, finger-stick glucose tests are inconvenient and often painful. But of greater significance is this downside: Finger-stick monitoring reveals the patient’s blood glucose concentration at a single point in time, which can be difficult to interpret. Is the blood glucose rising or falling? Multiple finger-stick tests are required to determine the trend of a patient’s glucose levels or the response to food or exercise.
In contrast, the graphic display from a CGM sensor is more like a movie, telling a story as it unfolds. Uninterrupted data provide valuable feedback to patients about the effects of diet, physical activity, stress, or pain on their glucose levels. And for the first time, it’s easy to determine the proportion of time the patient spends in or out of the target glucose range.
Incorporating new technology into your practice may seem like a burden, but the reward is better information that leads to better management of diabetes. If you’re new to glucose sensors, many excellent resources are available to learn how to use them.
I recommend starting with a website called diabeteswise.org, which has both a patient-facing and clinician-facing version. This unbranded site serves as a kind of Consumer Reports for diabetes technology, allowing both patients and professionals to compare and contrast currently available CGM devices.
DiabetesWisePro has information ranging from CGM device fundamentals and best practices to CGM prescribing and reimbursement.
Clinical Diabetes also provides multiple tools to help incorporate these devices into primary care clinical practice, including:
• Continuous Glucose Monitoring: Optimizing Diabetes Care (CME course).
• Diabetes Technology in Primary Care.
The next article in this series will cover two types of CGMs used in primary care: professional and personal devices.
Dr. Shubrook is a professor in the department of primary care, Touro University California College of Osteopathic Medicine, Vallejo, Calif., and director of diabetes services, Solano County Family Health Services, Fairfield, Calif. He disclosed ties with Abbott, Astra Zeneca, Bayer, Nevro, and Novo Nordisk.
A version of this article first appeared on Medscape.com.