What is the principle of blood glucose meter?

Rapid blood glucose meter whole blood measurement

Since the invention of the pocket blood glucose meter which can measure blood glucose with a drop of capillary whole blood in the 1970s, it has become possible for patients to detect blood glucose by themselves, get results quickly, decide treatment changes and shorten hospitalization days, so it is considered as a milestone in the history of diabetes treatment.

Because the rapid blood glucose meter can be operated by patients themselves, the Diabetes Association not only recommends self-test blood glucose for patients' own use, but also can be used for bedside examination of inpatients, especially in emergency room, operating room and intensive care unit. Until 2003, the document still emphasized the promotion of self-test blood glucose by fast blood glucose meter. The measurement of venous plasma is mainly used for diagnosis, calibration of pocket blood glucose meter and incidental measurement in scientific research and other biochemical tests.

Biochemical blood glucose meter

After the biochemical instrument draws venous blood, the blood is separated by a centrifuge to obtain plasma. The plasma of the blood glucose meter oxidizes glucose to generate hydrogen peroxide by reacting with glucose oxidase, and the blood glucose content is obtained by measuring the amount of hydrogen peroxide by another monitoring system. The advantage of biochemical analyzer is very accurate, but the disadvantage is that the measurement time is slow, and the results can usually be obtained the next day. The blood consumption is large, generally 3000 ~ 5000 microliters; The operation is complicated, and only professionally trained people can operate it; Machines are expensive, only some hospitals have them.