CDCES Diabetes Technology and Devices Flashcards

What does CGM stand for in diabetes management?

Answer: Continuous Glucose Monitoring

CGM stands for Continuous Glucose Monitoring, a technology that measures interstitial glucose levels automatically at regular intervals throughout the day and night.

What is the typical lag time between blood glucose and interstitial glucose readings on a CGM device?

Answer: 5–15 minutes

There is typically a 5–15 minute physiological lag between blood glucose and interstitial glucose, which is important when making rapid treatment decisions.

Which CGM metric best reflects overall glycemic control over a given time period, analogous to A1C but derived from CGM data?

Answer: Glucose management indicator (GMI)

The Glucose Management Indicator (GMI) is calculated from CGM mean glucose and approximates the expected A1C level based on sensor glucose data.

What is the ADA-recommended target for 'Time in Range' (70–180 mg/dL) for most adults with type 1 or type 2 diabetes?

Answer: Greater than 70%

The ADA recommends a Time in Range target of greater than 70% (approximately 17 hours per day) for most adults with type 1 or type 2 diabetes.

When educating a patient new to CGM, which instruction is most important regarding sensor calibration for devices that require it?

Answer: Use fingerstick blood glucose values during stable glucose periods for calibration

For CGM devices requiring calibration, fingerstick values should be entered during periods of stable glucose (not rapid change) to maximize sensor accuracy.

Which condition can falsely lower CGM sensor glucose readings in some older-generation devices?

Answer: Acetaminophen (paracetamol) ingestion

Acetaminophen can interfere with electrochemical CGM sensors and falsely lower readings in some older devices, though newer sensors are less susceptible.