New E-sensors Woven into Fabrics can Track Your Vital Signs Remotely

New study has developed a way to incorporate electronic sensors into stretchy fabrics that could be used to monitor vital signs like temperature, respiration, and heart rate.

Novel lightweight electronic sensors can be integrated into flexible fabrics, including the kinds of polyesters often used in athletic wear, to provide consistent monitoring of vital signs including body temperature, heart rate, and respiratory rate, reports a new study. The findings of the study are published in the journal NPJ Flexible Electronics.//

The sensor-embedded garments, which are machine washable, can be customized to fit close to the body of the person wearing them. The researchers envision that this type of sensing could be used for monitoring people who are ill, either at home or in the hospital, as well as athletes or astronauts.

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‘Novel Sensors woven into comfortable, form-fitting garments could be used to track patients' health remotely.’

"We can have any commercially available electronic parts or custom lab-made electronics embedded within the textiles that we wear every day, creating conformable garments," says Canan Dagdeviren, the LG Electronics Career Development Assistant Professor of Media Arts and Sciences at MIT. "These are customizable, so we can make garments for anyone who needs to have some physical data from their body like temperature, respiration rate, and so forth."

Dagdeviren is the senior author of a paper describing the new material. MIT graduate student Irmandy Wicaksono is the lead author of the study. Several MIT undergraduates also contributed to the study through the Undergraduate Research Opportunities Program.

Embedded sensors

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Other research groups have developed thin, skin-like patches that can measure temperature and other vital signs, but these are delicate and must be taped to the skin. Dagdeviren’s lab set out to create garments more similar to the clothes we normally wear, using a stretchy fabric that has removable electronic sensors incorporated into it.

"In our case, the textile is not electrically functional. It’s just a passive element of our garment so that you can wear the devices comfortably and conformably during your daily activities," Dagdeviren says. "Our main goal was to measure the physical activity of the body in terms of temperature, respiration, acceleration, all from the same body part, without requiring any fixture or any tape."

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The electronic sensors consist of long, flexible strips that are encased in epoxy and then woven into narrow channels in the fabric. These channels have small openings that allow the sensors to be exposed to the skin. For this study, the researchers designed a prototype shirt with 30 temperature sensors and an accelerometer that can measure the wearer’s movement, heart rate, and breathing rate. The garment can then transmit this data wirelessly to a smartphone.

The researchers chose their fabric a polyester blend for its moisture-wicking properties and its ability to conform to the skin, similar to compression shirts worn during exercise. Last summer, several of the researchers spent time at a factory in Shenzhen, China, to experiment with mass-producing the material used for the garments.

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"From the outside, it looks like a normal T-shirt, but from the inside, you can see the electronic parts which are touching your skin," Dagdeviren says. "It compresses on your body, and the active parts of the sensors are exposed to the skin."

The garments can be washed with the sensors embedded in them, and the sensors can also be removed and transferred to a different garment.

Remote monitoring

The researchers tested their prototype shirts as wearers exercised at the gym, allowing them to monitor changes in temperature, heart rate, and breathing rate. Because the sensors cover a large surface area of the body, the researchers can observe temperature changes in different parts of the body, and how those changes correlate with each other.

The shirts can be easily manufactured in different sizes to fit an array of ages and body types, Dagdeviren says. She plans to begin developing other types of garments, such as pants and is working on incorporating additional sensors for monitoring blood oxygen levels and other indicators of health.

This kind of sense could be useful for personalized telemedicine, allowing doctors to remotely monitor patients while patients remain at home, Dagdeviren says, or to monitor astronauts’ health while they’re in space.

"You don’t need to go to the doctor or do a video call," Dagdeviren says. "Through this kind of data collection, I think doctors can make better assessments and help their patients in a better way."

Source-Eurekalert