How to Use a Continuous Blood Glucose Meter A continuous blood sugar meter helps diabetic patients check and manage their blood sugar changes at any time. A user attaches a blood sugar meter sensor to his arm and monitors blood sugar trends on his smartphone. When you eat food provided by Asan Medical Center, the concentration of glucose (blood sugar) in your blood, which the body's cells use as an energy source, increases. Insulin secreted by the pancreas helps blood sugar enter the cells.