Scientists at the University of Tokyo in Japan have developed a new test to measure blood sugar levels. The patch has microneedles connected by a paper sensor, while the porous needles do not create pain.
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The innovation makes it possible to diagnose a condition preceding the onset of diabetes mellitus. A feature of microneedles is their biodegradability. The created patch is focused not on collecting blood, but on the fluid in the skin, containing the same amount of biomarkers that are determined in a conventional blood test. The paper sensors are connected to microneedles, and this instrument is disposable and has a low cost price.
When testing the action of the new patch, the scientists used an agarose gel, dissolving glucose in it. The microneedles absorbed the liquid from the composition and transferred it to the paper and the sensor layer. At the same time, the color of the latter changed, which made it possible to fix the glucose concentration. The new test is characterized by high accuracy, its advantage is biocompatibility, which does not cause problems due to the presence of needles on the skin after removing the patch.