points out an interesting little research story at the University of North Carolina, a wearable health-monitoring device powered by energy scavenged from the person wearing it.
The wearable Health and Environmental Tracker (HET) aims to anticipate,
for instance, an oncoming asthma attack and recommend immediate action
to thwart the event. Researchers hope that, eventually, most any chronic
malady can be similarly addressed by such sensor studded wearables
powered by energy harvested from the patients own body. To address this
issue, the National Science Foundation (NSF) is funding the Advanced
Self-Powered Systems of Integrated Sensors and Technologies (Assist)
project with up to $40 million.
Wearable electronics, things like a FitBit
are near the peak of the hype cycle, with all the market cheerleaders saying they're the Next Big Thing, so it's an idea at the right time. FitBits and Smartwatches
are powered by batteries, but to be really useful, devices like this HET need to be ultra low power, so that they can be powered by energy harvested from the wearer. My first thought would be to harvest tiny amounts of the power used in each leg stroke while walking - taking so little that it doesn't perceptibly increase the difficulty of walking. This one takes a different approach because their target is to warn people of oncoming asthma attacks.
"We are targeting asthma attacks first, in cooperation with partners
at the University of North Carolina (UNC, Chappel Hill)," (principal investigator) Bozlurt said.
"The Environmental Protection Agency told us the correct wellness and
environmental-parameters we needed to monitor in order to anticipate
Consequently, Bozlurt, (research assistant) Dieffenderfer and associates split the
functionality between a wrist worn sensor hub, a chest-adhering patch
and a handheld breathalyzer. The wristband focuses largely on
environmental factors, monitoring volatile organic compounds and ozone
in the air, as well as ambient humidity and temperature (the wristband
also includes additional sensors to monitor motion, heart rate, and
blood oxygen levels), then transmits collected data wirelessly to
medical professionals. The patch includes sensors that track a patient’s
movement, heart rate, respiratory rate, the amount of oxygen in the
blood, skin impedance and wheezing in the lungs. And the handheld
breathalyzer -- called a spirometer -- measures lung function.
It was graduate student James Dieffenderfer who came up with the idea of harvesting energy from the person's breathing to power the HET by using a tiny windmill.
In fact, the project has already won one award for its energy harvesting
spirometer which contains a tiny electricity generator that is driven
by the user blowing their breath into it, thus powering the device.
Dieffenderfer won a Center for Integration of Medicine & Innovative
for his energy harvesting spirometer. The $150,000 award will be used
by Dieffenderfer to develop and market his innovative energy-harvesting
health devices to consumers.
Asthma is still a killer, even in developed nations. Statistics say
that in the US, it kills around 3400 people a year, out of 24.6 million people with the disease. Globally, a quarter million people die from it every year. The idea that a device can monitor air quality parameters and the way the user breathes and detect a serious asthma attack is an interesting project. Since no one has ever done tried to monitor continuously in real time like this, no one really knows if they know how to predict such an attack. (One of my standard sayings to the young engineers, "when you look at something no one has ever looked at before, you see things that no one has ever seen before"!) That means they'll be running clinical trials to make sure they really have the subject covered.
(Early prototype of the HET wristband)
Once the conditions for an imminent asthma attack are determined during
clinical trials, a specialized cost reduced version can be produced. In the event that different things stimulate asthma attacks in different
people, personalized versions will be created. Initial experiments will
be done in controlled environments with industrial partners who want to
use the technology in future products.
They expect to be ready to go to production in around four years - in 2020. It's quite a reach to call such a limited use device a "wearable doctor", but it could mark the beginning of a very interesting trend.
A friend had a heart attack two years ago and literally died, except he was with a friend who is a doctor and the doc kept him alive for 10 minutes until the EMTs got there. Since then he has worn a defribilator device that would restart his heart if it quit. It has in fact saved his life 14 times since then. Crazy! A few years ago he probably would have simply died the first time his heart quit and no one was around to save him.ReplyDelete
I've heard of those. A really great invention, doubtless they've saved many lives.Delete