glucosemeter

Glucosemeter, also called glucometer, is a portable medical device that measures the concentration of glucose in a small sample of blood. It is widely used by people with diabetes to monitor glycemic control and guide treatment, as well as in clinical and laboratory contexts for rapid point-of-care testing.

For most devices, a disposable test strip with enzymatic chemistry is used to detect glucose. A drop of blood is placed on the strip, which is then read by the meter. The strip is inserted into the meter, which applies a small signal and displays a glucose value within seconds. Most meters report results in mg/dL in the United States and mmol/L in many other countries. Measurements can require fingerstick blood from the fingertip, though some meters support alternate sites.

Continuous glucose monitoring systems (CGMs) use a subcutaneous sensor to measure interstitial glucose continuously and transmit data to a receiver. CGMs are related technology but are not typically called glucose meters themselves; they are part of the broader category of glucose monitoring devices.

Accuracy and reliability depend on factors such as test strip quality, calibration, temperature, and user technique. International standards such as ISO 15197 set performance requirements, and many meters are validated against laboratory methods. Common limitations include interference from hematocrit, dehydration, and certain medications.

Use and interpretation: users record results, track trends, and adjust diet, exercise, or medications under medical advice. Test strips and meters are regulated medical devices and require proper storage, handling, and disposal of lancets and strips.