Dec 162017

Daryl Lovell
A radio frequency identification tag.

No visit to the doctor’s office is complete without a blood-pressure cuff squeezing your arm and a cold stethoscope placed on your chest. But what if your vital signs could be gathered, without contact, as you sit in the waiting room or the comfort of your own home?

Cornell engineers have demonstrated a method for gathering blood pressure, heart rate and breath rate using a cheap and covert system of radio-frequency signals and microchip “tags,” similar to the anti-theft tags department stores place on clothing and electronics.

The system is detailed in the paper “Monitoring Vital Signs Over Multiplexed Radio by Near-Field Coherent Sensing,” published online Nov. 27 in the journal Nature Electronics.

The cracker-sized tags measure mechanical motion by emitting radio waves that bounce off the body and internal organs, and are then detected by an electronic reader that gathers the data from a location elsewhere in the room.

The system works like radar, according to Edwin Kan, professor of electrical and computer engineering. But unlike most radar systems that rely solely on radio waves to measure movement, Kan’s system integrates “near-field coherent sensing,” which is better at directing electromagnetic signals into body tissue, allowing the tags to measure internal body movement such as a heart as it beats or blood as it pulses under skin.

The tags are powered by electromagnetic energy supplied by a central reader, and because each tag has a unique identification code it transmits with its signal, Kan said up to 200 people can be monitored simultaneously using just one central reader.

“If this is an emergency room, everybody that comes in can wear these tags or can simply put tags in their front pockets, and everybody’s vital signs can be monitored at the same time. I’ll know exactly which person each of the vital signs belongs to,” said Kan.

Edwin Kan, professor of electrical and computer engineering at Cornell, holds a radio frequency identification tag.

The idea originated after Kan and his graduate student, Xiaonan Hui, visited the Center for Sleep Medicine at Weill Cornell Medicine and NewYork-Presbyterian, where measuring vital signs can interrupt sleep patterns.

“So we were thinking about the kind of technology we were already using in our lab and thought we could probably get a signal from those vital signs,” said Hui. “But after we figured out the theory and did the experiments, the signal quality was better than our prediction.”

The signal is as accurate as an electrocardiogram or a blood-pressure cuff, according to Kan, who said he believes the technology could also be used to measure bowel movement, eye movement and many other internal mechanical motions produced by the body.

Kan and Hui plan to do more extensive testing with Dr. Ana Krieger, medical director of the Center for Sleep Medicine and associate professor of clinical medicine, of medicine in clinical neurology and of clinical genetic medicine at Weill Cornell Medicine. They’re also working with professor Jintu Fan and associate professor Huiju Park from Cornell’s Department of Fiber Science and Apparel Design, who have demonstrated a way to embroider the tags directly onto clothing using fibers coated with nanoparticles.

Hui envisions a future in which clothing can monitor health in real time, with little or no effort required by the user.

“For every garment in our daily use, there could be a tag on them, and your cellphone will read your vital signs and will tell you some kind of information about your condition that day,” said Hui.

Learn more: Engineers scrap the stethoscope, measure vital signs with radio waves


The Latest on: Radio waves to measure vital signs
  • Proximity Tags Emit Radio Waves to Monitor Heart, Lungs, Blood Pressure
    on January 4, 2018 at 10:15 am

    Contact-free measurement of vital signs ... only able to measure the breathing and heart rates, along with body movement. Technology developed at Cornell involves tags worn on clothing, or just placed near the patient, that emit radio waves toward the ... […]

  • Radio tags made to monitor vital signs
    on December 18, 2017 at 7:00 am

    By the time they actually get tended to, their vital signs will already be known ... has developed inexpensive microchip tags worn on the chest and wrist, that emit radio waves into the body. Those waves are then reflected back by organs such as the ... […]

  • Measuring Vital Signs Just Got Easier
    on November 27, 2017 at 7:11 am

    Now, two Cornell University researchers say they’ve devised a way to monitor vital signs that doesn’t require skin contact ... The sensors work by transmitting radio waves into the body and picking them back up after they bounce back to pass on ... […]

  • The $300 Welbi 'tricorder' that can wirelessly monitor the vital signs of anyone in the same room
    on September 5, 2017 at 11:56 am

    The Welbi is a small black box that monitor the vital signs of anyone in the same room as it. It uses radio waves to remotely read heart rate ... and is using space agency technology that can measure vital signs from a distance, without any physical ... […]

  • New artificial intelligence system can monitor your sleep with radio waves
    on August 7, 2017 at 8:56 am

    As the radio ... remotely measure vital signs and behaviours that can be indicators of health. These sensors consist of a wireless device, about the size of a laptop computer, that emits low-power radio frequency (RF) signals. As the radio waves reflect ... […]

  • New AI system can monitor your sleep with radio waves
    on August 7, 2017 at 4:00 am

    Scientists have developed a new artificial intelligence system that can monitor a person's sleep using ambient radio waves, without sensors attached ... sensors that enable them to remotely measure vital signs and behaviours that can be indicators of ... […]

  • A new way to monitor vital signs
    on November 23, 2015 at 6:41 am

    Using technology invented at MIT, doctors may one day be able to monitor patients' vital signs by having them ... of the acoustic wave, recorded from different parts of the GI tract, we found that we could measure both heart rate and respiratory rate ... […]

  • Wireless 'tattoo' created for vital sign checks
    on August 12, 2011 at 2:44 am

    A thin, electronic device can measure vital signs like heart and brain waves by sticking to the skin like a temporary tattoo, a team of engineers and scientists have demonstrated. Currently, hospitalized heart disease patients are often attached to bulky ... […]

via Google News and Bing News

Leave a Reply

%d bloggers like this: