To measure the accuracy of your meter, take it with you when you have a lab glucose test and check your blood immediately after. For best results, ask the lab to process your blood sample within 30 minutes.
Can glucometer reading be wrong?
Answer From M. Regina Castro, M.D. When used correctly, blood glucose monitors — small devices that measure and display your blood sugar levelblood sugar levelOral glucose tolerance test. A blood sugar level less than 140 mg/dL (7.8 mmol/L) is normal. A reading of more than 200 mg/dL (11.1 mmol/L) after two hours indicates diabetes. A reading between 140 and 199 mg/dL (7.8 mmol/L and 11.0 mmol/L) indicates prediabetes.https://www.mayoclinic.org › diabetes › drc-20371451Diabetes - Diagnosis and treatment - Mayo Clinic — are usually accurate. But occasionally they may be incorrect.
How do you calibrate a glucose meter?
To calibrate, you must use a fingerstick blood sample to test your blood glucose (BG) on your meter and then enter that value into your pump. The pump will accept BG meter readings between 40 mg/dL to 400 mg/dL.