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.
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
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Health
10 Simple Changes You Can Make Today for Improved Health and Wellness
Improve your health and wellness with these simple changes to your daily routine.
Boost Your Wellbeing with These Easy Tips
Living a healthy lifestyle is important for our physical and mental well-being, but sometimes it can be overwhelming to know where to start. However, there are simple changes that we can make to our daily routines that can have a big impact on our health and wellness. Here are 10 simple changes you can make today to improve your health and wellness.
- Drink more water: Staying hydrated is key for our body’s systems to function properly. Aim for at least 8 glasses of water a day.
- Add more fruits and vegetables to your diet: Fruits and vegetables are packed with nutrients and antioxidants that can help protect against diseases. Aim for at least 5 servings a day.
- Move more: Regular exercise is important for maintaining a healthy weight, reducing stress, and improving overall health. Find activities that you enjoy and aim for at least 30 minutes of physical activity a day.
- Get enough sleep: Sleep is essential for our body to heal and regenerate. Aim for 7-9 hours of sleep each night.
- Reduce stress: Chronic stress can have negative effects on our physical and mental health. Find activities that help you relax and reduce stress, like meditation or yoga.
- Practice good hygiene: Good hygiene practices like washing your hands regularly and showering daily can help prevent the spread of germs and illnesses.
- Limit alcohol intake: Drinking too much alcohol can have negative effects on our liver and overall health. Limit your intake to no more than 1-2 drinks per day.
- Quit smoking: Smoking is a major cause of many diseases and can have negative effects on our health. Quitting smoking is one of the best things you can do for your health.
- Wear sunscreen: Protect your skin from the harmful effects of the sun by wearing sunscreen with at least SPF 30, especially when spending time outdoors.
- Connect with others: Social connections are important for our mental health and well-being. Make an effort to spend time with friends and family, or find a community group that interests you.
Making these simple changes to your daily routines can have a big impact on your health and wellness. Remember that small steps can lead to big changes. Start with one or two changes and gradually add more as you feel comfortable. With time, these habits will become a natural part of your daily routine, helping you to live a healthier and happier life.
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(Family Features) While many Americans agree Conventional CPR (cardiopulmonary resuscitation) or Hands-Only CPR (HOCPR) significantly improve a person’s chance of survival from cardiac arrest, less than half are confident they can perform either Conventional CPR or HOCPR in an emergency.
Learning CPR
Black or Hispanic adults who experience cardiac arrest outside a hospital setting are substantially less likely to receive lifesaving care from a bystander. In spite of these survey results, the American Heart Association is working to change this by empowering members of these communities to learn lifesaving CPR, and a growing segment of respondents are willing to act in an emergency.
The American Heart Association’s 2023 survey also revealed that as a result of the organization’s efforts to change attitudes about performing CPR, which can lead to lifesaving results, more than half of African Americans said they would be willing to perform CPR in an emergency compared to 37% two years ago. Additionally, Hispanic and Latino respondents are more confident in their abilities to perform CPR.
Committed to turning a nation of bystanders into lifesavers, the American Heart Association’s multiyear initiative, Nation of Lifesavers, helps teens and adults learn how to perform CPR and use an automated external defibrillator (AED); share that knowledge with friends and family; and engage employers, policymakers, philanthropists and others to create support for a nation of lifesavers.
“Each of us has the power in our own hands to respond to a sudden cardiac arrest,” said Anezi Uzendu, M.D., American Heart Association expert volunteer. “We simply need to know what to do and have the confidence to act.”
The long-term goal: to ensure that in the face of a cardiac emergency, anyone, anywhere is prepared and empowered to perform CPR and become a vital link in the chain of survival, aiming to double the survival rate of cardiac arrest victims by 2030. It takes just 90 seconds to learn how to save a life using HOCPR, which can be equally as effective as traditional CPR in the first few minutes of cardiac arrest.
Nationally supported by the Elevance Health Foundation, the American Heart Association’s HOCPR campaign is focused on chest compression-only CPR. If a teen or adult suddenly collapses due to a cardiac event, you can take two steps to save a life: immediately call emergency services and use these tips to begin performing HOCPR.
- Position yourself directly over the victim.
- Put the heel of one hand in the center of the chest and put your other hand on top of the first.
- Push hard and fast in the center of the chest at a rate of 100-120 beats per minute, which is about the same tempo as the song “Stayin’ Alive” by the Bee Gees, and at a depth of approximately 2 inches.
- Continue compressions and use an AED, if available, until emergency help arrives.
To learn more about how you could be the difference between life and death for someone experiencing a cardiac event, visit Heart.org/nation.
Photo courtesy of Shutterstock
SOURCE:
American Heart Association
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STM Daily News is a multifaceted podcast that explores a wide range of topics, from life and consumer issues to the latest in food and beverage trends. Our discussions dive into the realms of science, covering everything from space and Earth to nature, artificial intelligence, and astronomy. We also celebrate the amateur sports scene, highlighting local athletes and events, including our special segment on senior Pickleball, where we report on the latest happenings in this exciting community. With our diverse content, STM Daily News aims to inform, entertain, and engage listeners, providing a comprehensive look at the issues that matter most in our daily lives. https://stories-this-moment.castos.com/
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How APOL1-mediated kidney disease can impact you, your kidneys and your family
(Family Features) A genetic condition that can cause kidney failure, APOL1-mediated kidney disease (AMKD) represents a group of kidney diseases associated with mutations (changes or variants) in the apolipoprotein L1 (APOL1) genes.
Typically, the APOL1 genes – of which every person has two, one from each parent – create proteins that play a role in immunity. However, some people are born with mutations in one or both genes, and having mutations in both can increase the risk of developing kidney disease and even kidney failure.
In honor of National AMKD Awareness Day on April 30, consider this information from the experts at the American Kidney Fund to better understand the disease and become APOL1 aware.
Understanding Risk Factors
Research shows Black people with kidney disease are more likely to develop kidney failure than any other racial or ethnic group. The reasons for these health disparities include social determinants of health, a higher burden of diabetes and high blood pressure in the Black community, barriers to health care access and genetics.
The APOL1 gene mutations evolved over the past 3,000-10,000 years in people who lived in western and central Africa and are associated with increased protection from a parasite carried by the tse tse fly that causes African sleeping sickness. While protecting from one disease, the mutation – if inherited in both APOL1 genes – is more likely to lead to kidney disease in those of certain African descent, including people who identify as Black, African American, Afro-Caribbean or Latina or Latino.
In fact, an estimated 13% of Black Americans have two APOL1 gene mutations, according to the American Kidney Fund. While not everyone who has two APOL1 mutations will get kidney disease, there is a 1 in 5 chance they will go on to develop AMKD.
Identifying Symptoms
If you have kidney damage, symptoms may not occur until your kidneys are close to failing. As kidney damage worsens, one or more of these symptoms may occur:
- Protein in urine
- Swelling in legs or weight gain
- Feeling weak or tired
- High blood pressure
Should these symptoms occur and you have a family history of kidney disease, talk to a doctor about getting tested for kidney disease, as testing is the only way to determine kidney function. AMKD can cause damage to parts of the kidney that filter blood or, in some cases, cause cells in the kidneys to die, which can lead to damage and scarring that may eventually lead to kidney failure.
Getting a Diagnosis
The only way to know if you have APOL1 gene mutations is to do genetic testing via a blood or saliva sample. Genetic testing may be considered if you have kidney disease and don’t know the cause or if you’re considering donating a kidney. Testing may also be considered if a family member is a carrier for the mutation. If you have questions about genetic testing, discuss your options with a doctor or ask for a referral to a genetic counselor.
Taking Steps to Prevent Kidney Disease
There are currently no treatments available for AMKD. However, there are steps you can take to protect your kidneys and promote general health. Work with your doctor to create a plan to prevent or delay the progression of kidney disease, which may include:
- Doctor visits to check how your kidneys are working through urine and blood tests
- Checking for and managing diabetes and high blood pressure
- A healthy eating plan, which may involve limiting things like sodium (salt)
- Taking prescription medications as directed
- Being active at least 30 minutes each day of the week
- Quitting smoking or using tobacco
If you have the APOL1 gene mutations, you may be able to take part in clinical trials. Trials could provide an opportunity for researchers to develop and test safe treatments for AMKD. Also speak with family members about having genetic testing done if you have the mutation as they may also have it.
Learn more and find additional resources at kidneyfund.org/APOL1aware.
Photo courtesy of Shutterstock
SOURCE:
American Kidney Fund
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
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