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Home Technology

Wearable sensor monitors health, administers drugs using saliva and tears

February 2, 2021
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Wearable sensor monitors health, administers drugs using saliva and tears
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A new kind of wearable health device would deliver real-time medical data to those with eye or mouth diseases, according to Huanyu  “Larry” Cheng, Dorothy Quiggle Career Development Professor in the Penn State Department of Engineering Science and Mechanics (ESM).

Cheng recently published a paper in Microsystems & Nanoengineering on new micro- and nano-device technology that could revolutionize how certain health conditions are monitored and treated.

“We sought to create a device that collects both small and large substances of biofluids such as tears and saliva, which can be analyzed for certain conditions on a rapid, continuous basis, rather than waiting on test results from samples in a lab,” he said.

The sensors would be placed near the tear duct or mouth to collect samples, which would then produce data viewable on a user’s smartphone or sent to their doctor, according to Cheng.

“But a device like this would have to be discreet, soft and comfortable for a patient to agree to wear it,” he said. “And it would have to be a low-cost option for patients.”

The tears- and saliva-sensing technology can help manage diseases like oral ulcers, oral cancer, eye wrinkles and oral or eye infections like keratitis, which is inflammation of the clear tissue on the front of the eye.

Last year, Cheng published on a similar wearable skin patch that collects sweat and tests for pH, sodium and glucose levels — most helpful for those with hypoglycemia or diabetes.

This new device not only collects data but also administers medicine with a microneedle through the skin around the eye, mouth or tongue.

“Through nano- to micro-steel ports on the device, we can probe the cell to deliver molecular drugs for treatment in a very efficient process at the cellular level,” Cheng said. “Conversely, the ports can allow us to get access to the gene and coding information on the cell.”

The researchers are developing working prototypes and are in talks with local manufacturers as well as the National Institutes of Health and Amazon for manufacturing the device on a large scale.

“This is a mature technology with a lot of interest behind it,” Cheng said. “There are many possible uses for the device if it makes it to the commercial marketplace.”

With future support from the National Science Foundation, Cheng hopes to extend the technology to other applications as well.

“There is strong motivation for us to apply this technology to similar sensing devices in the future,” he said.

The Doctoral New Investigator grant from the American Chemical Society Petroleum Research Fund, the National Science Foundation and Penn State supported this work. In addition to Cheng, other authors are Cheng’s graduate student Jia Zhu, Penn State doctoral candidate in ESM, as well as An’an Sheng, Long Lin, Jian Li, Jian Zhuang and Lingqian Chang, all from universities and research labs in China.

 
 
   
Tags: administersdrugshealthmonitorssalivasensorTearsWearable
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