Skip to contentSkip to navigation
COVID-19: We are open. Some services are modified. Mask is mandatory. Details at



Measuring blood glucose levels is primarily used to diagnose and monitor diabetes and hypoglycemia.

In an individual with the signs and symptoms of diabetes, blood sugar levels above 11.1 millimoles per litre (mmol/L) are compatible with diabetes. In a patient that has been fasting for at least 8 hours, blood sugar levels equal to or higher than 7.0 mmol/L on at least two occasions also indicate that diabetes is likely. Fasting blood sugar levels between 5.6 and 6.9 mmol/L is considered pre-diabetic. These results are generally confirmed by a measurement of glycated hemoglobin (HbA1c) which is also expected to be high. Other conditions that can lead to too much glucose: acromegaly, due to a pituitary gland tumour, acute stress, chronic kidney disease, overactive adrenal glands (Cushing syndrome), excessive eating, hyperthyroidism, etc.

Abnormally low blood glucose levels (hypoglycemia) can be encountered with adrenal gland failure, excessive alcohol consumption, severe liver disease, underactive pituitary gland or thyroid, severe cardiac failure, chronic kidney failure, an overdose of insulin or a tumour producing insulin (insulinoma), prolonged fasting or the deliberate use of blood glucose lowering substances.

Term of the Week

Hot zone

A hot zone is a section of a facility (sometimes an entire facility or even a city district) where there is a high risk of contamination by patients with an infectious disease. All individuals entering a hot zone must respect appropriate protective measures. By analogy, “cold zone” and “warm zone” are used to refer to areas where there is no infected individual or only individuals suspected of having an infection.