A glucometer is used to evaluate which parameter?

• A. Blood sugar levels
• B. Lung function
• C. Blood pressure
• D. Kidney function

Answer: (A)

A glucometer measures the concentration of glucose in the blood, i.e., blood sugar levels. It uses a small drop of blood on a test strip and an enzymatic reaction (often glucose oxidase or glucose dehydrogenase) that generates a current proportional to the glucose amount; the meter then displays the glucose value in mg/dL or mmol/L. This is essential for diabetes management, helping to detect hyperglycemia or hypoglycemia and to adjust diet, meds, or insulin. It does not assess lung function, blood pressure, or kidney function, which require different tests and instruments.