Sometimes my blood glucose monitor seems to give incorrect readings. What can I do to make sure the measurement is accurate?
Answers from Maria Collazo-Clavell, M.D.
When you start a new container of test strips, occasionally perform these quality control tests as you use them and when your results seem unusual.
To perform a quality control test, do one or both of the following:
- Test using a control solution. Follow your normal blood-testing procedure, but use a liquid control solution instead of blood. These solutions usually come with your monitor and are available at most drugstores and pharmacies. Follow package directions.
- Match your reading with lab results. Take the blood glucose monitor along when you visit your doctor or have an appointment for lab work. Check your blood glucose with your meter at the same time that blood is drawn for lab tests. Then compare your meter's reading with the lab results. Your meter's result is considered accurate if it falls within 15 percent of the lab test result.
Mar. 13, 2012
- Checking your blood glucose. American Diabetes Association. http://www.diabetes.org/living-with-diabetes/treatment-and-care/blood-glucose-control/checking-your-blood-glucose.html. Accessed Dec. 7, 2011.
- Common problems with the use of glucose meters at the point of care. U.S. Food and Drug Administration. http://www.fda.gov/MedicalDevices/Safety/AlertsandNotices/TipsandArticlesonDeviceSafety/ucm109449.htm. Accessed Dec. 7, 2011.
- McCulloch DK. Blood glucose self-monitoring in management of diabetes mellitus. http://www.uptodate.com/home/index.html. Accessed Dec. 6, 2011.
- Blood glucose monitoring devices. U.S. Food and Drug Administration. http://www.fda.gov/MedicalDevices/ProductsandMedicalProcedures/InVitroDiagnostics/GlucoseTestingDevices/default.htm. Accessed Dec. 7, 2011.
- Boren SA, et al. Analytical and clinical performance of blood glucose monitors. Journal of Diabetes Science and Technology. 2010;4:84.