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Diabetes is a chronic and, in response to the state-of-the-art, an incurable illness. Therefore, to deal with diabetes, regular blood glucose monitoring is essential since it's obligatory to mitigate the risk and incidence of hyperglycemia and hypoglycemia. Nowadays, it is not uncommon to make use of blood glucose meters or continuous glucose monitoring through stinging the skin, which is categorized as invasive monitoring. In current decades, non-invasive monitoring has been thought to be a dominant analysis subject. On this paper, electrochemical and electromagnetic non-invasive blood glucose monitoring approaches will likely be discussed. Thereby, scientific sensor techniques are in comparison with business units by validating the sensor principle and investigating their performance using the Clarke error grid. Additionally, the alternatives to enhance the overall accuracy and stability of non-invasive glucose sensing and even predict blood glucose growth to avoid hyperglycemia and hypoglycemia using publish-processing and sensor fusion are introduced. Overall, the scientific approaches show a comparable accuracy within the Clarke error grid to that of the business ones. However, they are in numerous phases of improvement and, due to this fact, need enchancment relating to parameter optimization, temperature dependency, or testing with blood beneath actual circumstances. Moreover, the size of scientific sensing solutions have to be further lowered for a wearable monitoring system.
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