New biosensor produces sweat even when patient is relaxed 

Researchers have developed a biosensor that uses a chemical stimulant to produce sweat even when the patient is relaxed and cool.

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According to a Research:

• According to the the findings published in the journal Lab on a Chip.
• Testing sweat, an important factor in understanding the hormones or chemicals, has several possible benefits over blood.
• Blood analysis is considered the gold standard for biometric analysis. But biometric testing with blood is invasive and often requires the use of a lab. It is far more difficult for the doctors to perform continuous monitoring of blood over hours or days.
• Jason Heikenfeld, Professor at the University of Cincinnati.
• Said,sweat provides a noninvasive alternative, with chemical markers that are more useful in monitoring health than saliva or tears.
• People for a long time ignored sweat because although it can be a higher-quality fluid for biomarkers, you can’t rely on having access to it.
• “Our goal was to achieve methods to stimulate sweat whenever needed — or for days,” Heikenfeld added.

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Experiment:

• For the study, the researchers applied sensors and a gel containing carbachol, a chemical used in eyedrops, to their subject’s forearm for 2.5 minutes.
• They then recorded data obtained from the subject’s sweat for 30 minutes using sensors that measured concentrations of sweat electrolytes.
• Carbachol was effective at inducing sweating under the sensor for as long as five hours.
• A subsequent experiment successfully generated sensor results for several days, using this process to stimulate sweat, Heikenfeld said
• “This work represents a significant leap forward in sweat-sensing technology.”