So far there is no portable device that could measure the blood glucose level and react with the right amount of insulin. People need to test and monitor their own blood glucose level and use their brain to calculate the use of insulin in their body.
If you have type 1 diabetes, you need to monitor at least before meals and at bedtime. If you have type 2 diabetes, you can relax a little bit with the monitoring if you are stable.
You should discuss to your doctor to find out what you should do in response to your test result. If you and your doctor know how to use computer, you will do much better with a meter that can be downloaded into a computer. All you need to look is the trends, and computer will help you in seeing the trends easily. With computer you can look at dozens of test result at one on the screen and it is more comfortable than turning pages of a booklet containing your blood glucose result.
Blood glucose test reflect only a moment in time. So you cannot act with that test data only. What you need to know is whether you are in control 24 hours a day. You need to test you hemoglobin A1c at least every four months if you are stable and every three months if you are not. If your condition is close to the normal, then you do not need to worry about long-term complications and if you are lucky you will also not suffer from short-term complications.
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