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Portable sensors to decode our sweat

Blood tests are usually used to provide an overview of our general health. It is thanks to them that our doctor knows if we are dehydrated or tired. But for phobic needles, this invasive procedure can be a particularly unpleasant experience. Bite can very soon just be a bad memory. According to a study published Friday, August 16 in the journal Sciences Advances researchers at the University of California, Berkeley, are developing skin sensors that can detect the contents of our sweat. Our body temperature, as well as the levels of sodium, potassium, glucose and lactic acid … all these important information about our metabolism can be detected in sweat.

Researchers managed to create their unit through the procedure called roll-to-roll. The latter allowed them to print the sensors in a plastic sheet. These contain a microscopic spiral or micro fluid tube that sweat away from the skin. By tracking the rate of sweating, sensors report how a patient is sweating. Microfluids are also equipped with chemical sensors that can detect electrolyte concentrations such as potassium and sodium, and metabolites such as glucose.

The researchers placed the sweat sensors on different parts of the voluntary bodies. including forehead, forearm, forearm and upper back. They measured their transpiration rate and the levels of sodium and potassium in sweat as they went to the gym.

Give tips to athletes who force too much

They could see that sweating speed can indicate fluid loss during exercise. Thus, the study of the sweating rate can help give advice to athletes who force too much. "Before people did that, it was collecting sweat from their bodies for a while and analyzing it, so you couldn't really see the dynamic changes with good resolution. With these portable devices, we can now collect continuous data from different parts of the body for to understand, for example, how sweat loss can estimate the loss of body fluid, says Yin Yin Nyein Hinin, co-author of the magazine. applications, "says Jussi Hiltunen, who participated in the study."

"No simple, universal correlation between sweating and blood sugar"

But "the goal of our project is not just to make these sensors but to start doing a lot study and see what transpiration tells us. I always say 'decode' the composition of the sweat, "says Ali Javey, professor in technical engineering and computer science, main author of the thesis.

Researchers also used their sensors to compare blood sugar levels in healthy ones and you found that a single measurement of sweat glucose did not necessarily indicate a person's blood sugar. "There was a lot of hope that non-invasive sweat tests could replace blood tests for diagnosis and monitoring diabetes, but we have shown that there is no simple and universal correlation between sweating and blood sugar," says Mallika Bariya, a PhD student in materials science and technology at UC Berkeley and other lead authors of the study conclude: "It is important for society to know that in the future we will focus on the correlations of divided or multiparametric."

Diabetes is a very common disease in the world. According to WHO increased the number of people affected from 108 million in 1980 to 422 million in 2014. And a large majority of patients have type 2 diabetes Abuse of insulin in the body It usually occurs due to overweight and sedentary lifestyle.

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