TABLE 3.

Trend Arrow Interpretation for Three Commonly Used CGM Systems (27–29)

Medtronic Arrow	Dexcom Arrow	FreeStyle Libre Arrow	Trend Meaning	Glucose Value in 30 Minutes*
↑↑↑	↑↑	NA	Glucose is rising very quickly, >3 mg/dL/min	>90 mg/dL higher
↑↑	↑	↑	Glucose is rising quickly, 2–3 mg/dL/min (>2 mg/dL/min with FreeStyle Libre)	60–90 mg/dL higher (>60 mg/dL for FreeStyle Libre)
↑	↗	↗	Glucose is rising 1–2 mg/dL/min	30–60 mg/dL higher
No arrow	→	→	Glucose is changing slowly, <1 mg/dL/min	<30 mg/dL
↓	↘	↘	Glucose is falling 1–2 mg/dL/min	30–60 mg/dL lower
↓↓	↓	↓	Glucose is falling quickly, 2–3 mg/dL/min (>2 mg/dL/min with FreeStyle Libre)	60–90 mg/dL lower (>60 mg/dL for FreeStyle Libre)
↓↓↓	↓↓	NA	Glucose is falling very quickly, >3 mg/dL/min	>90 mg/dL lower

^*Predicted 30-minute change in glucose is illustrative. NA, not applicable.