health and wellness
A smartphone’s camera and flash could help people measure blood oxygen levels at home
When we breathe in, our lungs fill with oxygen, which is distributed to our red blood cells for transportation throughout our bodies. Our bodies need a lot of oxygen to function, and healthy people have at least 95% oxygen saturation all the time.
Last Updated on May 21, 2024 by Daily News Staff
Dennis Wise/University of Washington
In a proof-of-principle study, University of Washington and University of California San Diego researchers have shown that smartphones are capable of detecting blood oxygen saturation levels down to 70%. The technique involves having participants place their finger over the camera and flash of a smartphone, which uses a deep-learning algorithm to decipher the blood oxygen levels from the blood flow patterns in the resulting video.
In a proof-of-principle study, University of Washington and University of California San Diego researchers have shown that smartphones are capable of detecting blood oxygen saturation levels down to 70%. The technique involves having participants place their finger over the camera and flash of a smartphone, which uses a deep-learning algorithm to decipher the blood oxygen levels from the blood flow patterns in the resulting video.
Newswise — First, pause and take a deep breath.
When we breathe in, our lungs fill with oxygen, which is distributed to our red blood cells for transportation throughout our bodies. Our bodies need a lot of oxygen to function, and healthy people have at least 95% oxygen saturation all the time.
Conditions like asthma or COVID-19 make it harder for bodies to absorb oxygen from the lungs. This leads to oxygen saturation percentages that drop to 90% or below, an indication that medical attention is needed.
In a clinic, doctors monitor oxygen saturation using pulse oximeters — those clips you put over your fingertip or ear. But monitoring oxygen saturation at home multiple times a day could help patients keep an eye on COVID symptoms, for example.
In a proof-of-principle study, University of Washington and University of California San Diego researchers have shown that smartphones are capable of detecting blood oxygen saturation levels down to 70%. This is the lowest value that pulse oximeters should be able to measure, as recommended by the U.S. Food and Drug Administration.
The technique involves participants placing their finger over the camera and flash of a smartphone, which uses a deep-learning algorithm to decipher the blood oxygen levels. When the team delivered a controlled mixture of nitrogen and oxygen to six subjects to artificially bring their blood oxygen levels down, the smartphone correctly predicted whether the subject had low blood oxygen levels 80% of the time.
The team published these results Sept. 19 in npj Digital Medicine.
“Other smartphone apps that do this were developed by asking people to hold their breath. But people get very uncomfortable and have to breathe after a minute or so, and that’s before their blood-oxygen levels have gone down far enough to represent the full range of clinically relevant data,” said co-lead author Jason Hoffman, a UW doctoral student in the Paul G. Allen School of Computer Science & Engineering. “With our test, we’re able to gather 15 minutes of data from each subject. Our data shows that smartphones could work well right in the critical threshold range.”
Another benefit of measuring blood oxygen levels on a smartphone is that almost everyone has one.
“This way you could have multiple measurements with your own device at either no cost or low cost,” said co-author Dr. Matthew Thompson, professor of family medicine in the UW School of Medicine. “In an ideal world, this information could be seamlessly transmitted to a doctor’s office. This would be really beneficial for telemedicine appointments or for triage nurses to be able to quickly determine whether patients need to go to the emergency department or if they can continue to rest at home and make an appointment with their primary care provider later.”
The team recruited six participants ranging in age from 20 to 34. Three identified as female, three identified as male. One participant identified as being African American, while the rest identified as being Caucasian.
To gather data to train and test the algorithm, the researchers had each participant wear a standard pulse oximeter on one finger and then place another finger on the same hand over a smartphone’s camera and flash. Each participant had this same set up on both hands simultaneously.
“The camera is recording a video: Every time your heart beats, fresh blood flows through the part illuminated by the flash,” said senior author Edward Wang, who started this project as a UW doctoral student studying electrical and computer engineering and is now an assistant professor at UC San Diego’s Design Lab and the Department of Electrical and Computer Engineering.
“The camera records how much that blood absorbs the light from the flash in each of the three color channels it measures: red, green and blue,” said Wang, who also directs the UC San Diego DigiHealth Lab. “Then we can feed those intensity measurements into our deep-learning model.”
Each participant breathed in a controlled mixture of oxygen and nitrogen to slowly reduce oxygen levels. The process took about 15 minutes. For all six participants, the team acquired more than 10,000 blood oxygen level readings between 61% and 100%.
The researchers used data from four of the participants to train a deep learning algorithm to pull out the blood oxygen levels. The remainder of the data was used to validate the method and then test it to see how well it performed on new subjects.
“Smartphone light can get scattered by all these other components in your finger, which means there’s a lot of noise in the data that we’re looking at,” said co-lead author Varun Viswanath, a UW alumnus who is now a doctoral student advised by Wang at UC San Diego. “Deep learning is a really helpful technique here because it can see these really complex and nuanced features and helps you find patterns that you wouldn’t otherwise be able to see.”
The team hopes to continue this research by testing the algorithm on more people.
“One of our subjects had thick calluses on their fingers, which made it harder for our algorithm to accurately determine their blood oxygen levels,” Hoffman said. “If we were to expand this study to more subjects, we would likely see more people with calluses and more people with different skin tones. Then we could potentially have an algorithm with enough complexity to be able to better model all these differences.”
But, the researchers said, this is a good first step toward developing biomedical devices that are aided by machine learning.
“It’s so important to do a study like this,” Wang said. “Traditional medical devices go through rigorous testing. But computer science research is still just starting to dig its teeth into using machine learning for biomedical device development and we’re all still learning. By forcing ourselves to be rigorous, we’re forcing ourselves to learn how to do things right.”
Additional co-authors are Xinyi Ding, a doctoral student at Southern Methodist University; Eric Larson, associate professor of computer science at Southern Methodist University; Caiwei Tian, who completed this research as a UW undergraduate student; and Shwetak Patel, UW professor in both the Allen School and the electrical and computer engineering department. This research was funded by the University of Washington. The researchers have applied for a patent that covers systems and methods for SpO2 classification using smartphones (application number: 17/164,745).
Source: University of Washington
Food and Beverage
A Lesson in Kindness, Inclusion and How Kids Eat Differently
Kids Eat Differently: The school year brings new classmates, routines and opportunities for children to learn about people whose experiences may be different from their own. They could include friends who use a wheelchair, carry an inhaler or even receive nutrition through a feeding tube.
A Lesson in Kindness, Inclusion and How Kids Eat Differently
(Feature Impact) The school year brings new classmates, routines and opportunities for children to learn about people whose experiences may be different from their own. They could include friends who use a wheelchair, carry an inhaler or even receive nutrition through a feeding tube.
Watch this video to learn more
For families who rely on tube feeding, it is an essential part of daily life but is often understood only by those who experience it. That limited awareness can leave children who are tube fed and their families feeling isolated or unseen, according to Gerard Minor, a pediatric gastroenterology and hepatology specialist.
Parents can use everyday questions as opportunities to help children understand there are many ways people receive nourishment. Teachers, classmates, caregivers and communities can also help make tube feeding part of the everyday conversation around childhood rather than something that separates children from it.
“Helping children understand those differences early can encourage curiosity, kindness and inclusion,” Minor said.
To help bring greater awareness, understanding and representation to children and families who experience tube feeding every day, Compleat, a leader in tube feeding formulas, launched “What Is Better Than How,” featuring “Sesame Street’s” Elmo and his signature warmth and curiosity. The original song celebrates the many ways people eat. Some people eat with a fork, some use a spoon and some use a tube, reinforcing a simple message: What matters is not how you eat. What matters is that you are nourished, loved and included.
To hear the song, create a personalized version and learn more about the campaign, visit Compleat.com/WhatIsBetterThanHow.
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Health and Life Insurance
Lessons in Life Insurance: 4 Reasons Getting It May Be Easier Than You Think
Life is the most valuable thing you have – and like all valuable things, it should be insured. Even thinking about life insurance can be stressful, so it’s one of those things that’s easy to put off and tell yourself you’ll do another day. Consider these four ways to make getting life insurance simpler than you thought.
Lessons in Life Insurance: 4 Reasons Getting It May Be Easier Than You Think
(Feature Impact) Life is the most valuable thing you have – and like all valuable things, it should be insured. Even thinking about life insurance can be stressful, so it’s one of those things that’s easy to put off and tell yourself you’ll do another day.
If that’s how you feel, you aren’t alone. According to the 2026 Life Happens Life Insurance Survey, nearly half (46%) of U.S. adults have getting life insurance on their to-do list but plan to deal with it later or not at all. Confusion, procrastination and cost concerns are among the main reasons people kick this can down the road, according to 45% of respondents.
Yet the survey also uncovered an interesting disconnect: 69% of Americans said they personally know someone who had life insurance or whose family used a life insurance policy, most often a parent or parent figure (33%), but still haven’t made getting coverage a priority.
“Life insurance isn’t unfamiliar to most Americans,” Life Happens Executive Director Brian Steiner said. “The challenge is turning that awareness into action. People may think life insurance is something they can deal with later, but waiting can leave the people they love financially vulnerable. Getting started doesn’t have to be complicated, and professional guidance can help you find protection that fits your needs and budget.”
Consider these four ways to make getting life insurance simpler than you thought.
Watch this video to learn more
1. Find a policy that’s a fit.
Roughly 4 in 10 survey respondents reported feeling overwhelmed, anxious or some combination of both about planning for life insurance, with 12% citing thinking it’ll be too expensive as a reason they’ve delayed looking into, buying or updating life insurance.
The good news: There’s a policy that’s right for your current needs. It may be term life insurance, which provides protection for a specific period of time, like to cover a mortgage or tuition for children. There’s also permanent life insurance, which offers lifelong protection, as long as you pay the premiums.
2. Take advantage of digital tools
One-quarter of respondents said they’d be more likely to look into life insurance if they learned it was easier to get than they thought, and digital tools can help make that demand a reality.
It can take as little as two minutes to find out how much you need, for example, with the life insurance needs calculator from the nonprofit Life Happens. Just answer a few simple questions to estimate the amount of life insurance coverage you may need to take care of your family.
3. It’s about protection, not perfection.
Part of the anxiety around life insurance may be the perception that it should be perfect. For more than 1 in 5 survey participants, the plan is to seriously look at it when they feel more financially stable, and another 12% simply said they’ll do it when they’re older.
However, life insurance doesn’t have to check all the boxes for every stage of your life – you can find what works for your family right now then adjust as things change over time.
4. Professional help is available.
Perhaps the biggest hurdle to tackling life insurance is the feeling that you’re in it alone. Overall, 55% of respondents said if they learned life insurance may be easier to get than they expected, they’d be more likely to start the process.
With professional help only a few clicks away, you can rest assured you’re on the path to a life insurance fit that’s right for you by visiting findapro.lifehappens.org.
Photo courtesy of Shutterstock
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Child Health
Changing the Landscape of Childhood Cancer Survivorship
Childhood Cancer: hile “cancer” is a term no family wants to hear, especially when it comes to their children, there is reason for hope. Today, 85% of children diagnosed with cancer survive at least five years. Survival is only part of the journey, however.
Changing the Landscape of Childhood Cancer Survivorship
(Feature Impact) While “cancer” is a term no family wants to hear, especially when it comes to their children, there is reason for hope. Today, 85% of children diagnosed with cancer survive at least five years, according to the National Cancer Institute, up from 75% three decades ago.
Watch this video to learn more
“This progress is driven in large part by dedicated research,” Hyundai Hope on Wheels Board Member Kevin Reilly said. “Over the last 28 years, Hyundai Hope on Wheels has committed over $300 million in pediatric cancer research and program grants, awarding more than 1,600 grants to 210 medical institutions nationwide, impacting thousands of young lives each year.”
Survival is only part of the journey, however. Nearly half (46%) of U.S. adults believe a child ringing the hospital bell after cancer treatment means the child is cancer-free and their medical journey is largely over, according to a survey conducted by Atomik Research on behalf of Hyundai Hope on Wheels. For the children and families living through a diagnosis, the reality is far more complex.
“The reality is that healing continues long after treatment, which is why sustained investment in survivorship care is a priority for us,” said John Guastaferro, executive director of Hyundai Hope on Wheels.
Isabella Franco-Capps, 11, understands that journey firsthand. Diagnosed with B-cell acute lymphoblastic leukemia at age 5, her journey took two years before she could say she’s “a cancer survivor.”
“I was diagnosed with b-cell acute lymphoblastic leukemia,” she said. “This began my two-year-long journey of scans, pokes, chemotherapy and hospital stays. And now I’m a cancer survivor.”
Fellow Hyundai Hope on Wheels National Youth Ambassador, Jackson Trihn, 12, is using his voice to call for continued research and to bring hope to others.
“The role … is being able to share my story,” he said. “Not just to spread awareness but to spread hope to kids that need it. And awareness is so important because people don’t understand how hard pediatric cancer can be.”
Continued progress can help ensure more children ring the bell and receive the care and support they need long after they’ve had the opportunity to do so. To learn more about these efforts and how you can help, visit HyundaiHopeOnWheels.org.
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