Blood glucose meter
The most common way to check glucose levels involves pricking a fingertip with an automatic lancing device to obtain a blood sample and then using a glucose meter to measure the blood sample's glucose level. Many types of glucose meters are available, and all are accurate and reliable if used properly. The American Diabetes Association produces an annual resource guide at www.diabetes.org.
Continuous glucose monitoring
Continuous glucose monitoring systems use a tiny sensor inserted under the skin to check glucose levels in tissue fluid. The sensor stays in place for several days to a week and then must be replaced. A transmitter sends information about glucose levels via radio waves to a wireless monitor that you wear.