All new wearable sweat sensor can monitor levels of metabolites and nutrients in blood

A mass-producible wearable sensor has been developed by U.S. researchers, that can monitor levels of metabolites and nutrients in one’s blood by analyzing sweat, according to the latest release of the California Institute of Technology (Caltech).

The new sweat sensor, developed by a team led by Wei Gao, assistant professor of medical engineering at Caltech, is more sensitive than previously developed sweat sensors.

The new sensor can detect sweat compounds of much lower concentrations, while the previous ones mostly target compounds that appear in high concentrations, such as electrolytes, glucose, and lactate, it said.

The development of such sensors would allow doctors to continuously monitor the condition of patients with illnesses like cardiovascular disease, diabetes, or kidney disease, all of which result in abnormal levels of nutrients or metabolites in the bloodstream, it added.

“Such wearable sweat sensors have the potential to rapidly, continuously, and noninvasively capture changes in health at molecular levels,” Gao said. “They could enable personalized monitoring, early diagnosis, and timely intervention.”

To see how well the sensors perform, the researchers ran a series of tests with healthy individuals and patients.

Gao said the high sensitivity of the sensors, along with the ease with which they can be manufactured, means they could eventually be used by patients at home to monitor conditions like gout, diabetes, and cardiovascular diseases.

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