MARK CLARKE / SCIENCE PHOTO LIBRARY MARK CLARKE / SCIENCE PHOTO LIBRARY
Blood glucose tester being used by a diabetic patient. This device measures the level of glucose in the blood. Diabetes is a disorder in which the production of the hormone insulin, which regulates blood glucose levels, is reduced. Diabetic patients need to regularly check their blood glucose levels and inject themselves with insulin if levels are abnormal. This device pricks the skin to obtain a drop of blood, which is then tested. The blood glucose level is then displayed on the screen.
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