How does a blood glucose meter work?

Diabetics may ask themselves ‘How does a blood glucose meter work?.’ The short of it is that a blood glucose meter works by calculating your level of blood sugar. It does this by ‘reading’ a small blood sample; usually a single drop drawn from a fingertip with a device called a lancet. The drop is then placed on a test strip, which in turn is inserted into the blood glucose meter. The test strip contains substances that react with the sugar in the blood resulting in ferrocyanide. The ferrocyanide sends an electrical current to the meter, which uses it to assess the quantity of blood glucose. This entire process is manifested in a digital number that the user reads and records.
Blood glucose meters are not infallible, though, and despite the fact that they all have the same mechanism of action, each model may have differences that could affect the reading if the user is not aware of them. In order to avoid misreading, you should read the instructions very carefully and consult your doctor, who will preferably recommend a specific model for you to use based on his professional opinion. In addition to being affected by the model and quality of the meter and strips, the accuracy of the test may be compromised by interfering substances like vitamin C, Tylenol, and uric acid, as well as by altitude, temperature and humidity. 

Moreover, whether the reading is correct has a lot to do with how the test is performed, which is the individual’s personal responsibility. To ensure accurate results, the user should wash and dry their hands and the test site prior to testing, make sure that the strips have not been exposed to extreme temperatures, and check their expiration date. Some meters require that a code number from the strip container be entered; make sure to enter it correctly. The sample should be large enough, and more blood should not be applied after it has been done once already. Another factor that can sway a test is the user’s hematocrit, or level of red blood cells. Hematocrit may be influenced by dehydration and anemia. Your physician can determine whether your hematocrit is too high or too low, and explain the effect it can have on testing. 
That a meter worked properly once doesn’t mean it will do so forever. So how does a blood glucose meter work improperly? Well, if you drop it or generally treat it roughly, it may start producing inaccurate results as a consequence of wear and tear. Fortunately, there are several methods for checking a meter’s performance. You may employ a liquid control solution whenever you open a new strip test container, of if you start getting irregular results. You may also pay attention to the device’s electronic checks, and refer to the instruction manual for error codes. Finally, you may run a comparison between your meter and a laboratory blood glucose test. Notify both your doctor and the meter manufacturer should your blood glucose meter ever malfunction. 

Related Read: Buy Diabetic Supplies and Diabetic Products