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
5 strategies to combat stressful triggers
(Family Features) Stress, the physical or mental response to external causes like overwhelming work assignments or difficult life moments, can add unnecessary pressure to your day to day. While everyone feels stress from time to time, when left untreated or unrecognized, it can begin to wreak havoc in the form of anxiety.
In honor of National Stress Awareness Month, consider these strategies to combat stress from the National Institutes of Mental Health.
Learn Your Triggers
Different events and situations cause stress for different people. Knowing what triggers your stress to kick in – mounds of office paperwork, important financial decisions or hectic mornings, for example – can help you plan and prepare for stress-inducing moments.
Exercise and Eat Right
Maintaining physical health can be beneficial for mental health, too. Find time to do exercises you enjoy like walking, jogging, yoga or playing a sport. Identifying activities that bring you joy can make it easier to fit 30-60-minute workouts into your schedule without adding even more stress. Complement your workout routine with nutritional meals that help you stay on track with your fitness goals.
Practice Relaxation
Whether you find inner peace through journaling, breathing exercises, reading or some other form of slowing down, find what works for you and prioritize fitting it into your daily schedule. Relaxing activities help you slow down the pace of life, providing a chance to reset by doing something you enjoy.
Get Enough Sleep
A lack of quality sleep can add to stress. Creating a bedtime routine can increase your sleep habits and help you achieve the expert-recommended 7-9 hours per night. Put away electronics, which can interfere with your ability to calm your mind, and find an activity that puts you at ease like reading a book or listening to relaxing music. Ensure your bedroom is optimized for comfort by making it cool, dark and quiet.
Create a Network of Support
Everyone experiences stress. Reach out to family members and close friends you can lean on in stressful and frustrating moments. Share your feelings and encourage others to do the same, which can increase trust and help everyone in your circle cope in a positive way.
Find more ways to combat stress and care for your mental health at eLivingtoday.com.
Photo courtesy of Unsplash
SOURCE:
eLivingtoday.com
(Family Features) For those with asthma, understanding what can trigger symptoms is a part of getting the condition under control. Some of the same things that cause allergies can worsen symptoms, but not every allergen is a trigger for everyone with asthma. The places where you live, learn, work and play can expose you to common asthma triggers like pet dander, dust mites, pests like rodents and cockroaches, mold, cigarette smoke, pollen, air pollution and more. Managing triggers is just one part of controlling asthma, however. Work with your health care provider to make an asthma action plan and keep track of your symptoms and where you are when they occur. Learn more at nhlbi.nih.gov/BreatheBetter.
Food and Beverage
The 10 Best Healthiest Seafood Options: Nutrient-Rich and Sustainable Choices
“From sardines to salmon, discover the top 10 healthiest and sustainable seafood options for a nutrient-rich diet. 🐟🌱 #Seafood”
Seafood is a treasure trove of essential nutrients and beneficial compounds that can significantly contribute to a healthy diet. From the omega-3 fatty acids that promote heart health to the abundance of vitamins and minerals, incorporating seafood into your meals can have a positive impact on your overall well-being. In this blog post, we will delve into the ten best healthiest seafood options, considering their nutritional content, sustainability, and potential contaminants.
- Sardines:
These small fish are incredibly nutritious, packed with omega-3 fatty acids, vitamin B12, vitamin D, and calcium. Sardines are also low in contaminants and are considered one of the most sustainable seafood options available. - Salmon:
Salmon is well-known for its impressive omega-3 content. It also provides high-quality protein, vitamin D, vitamin B12, and selenium. Opt for wild-caught Alaskan salmon for the best nutritional benefits and sustainability. - Oysters:
Oysters are a true nutritional powerhouse, rich in vitamins B12, D, and zinc. They are a sustainable choice and an excellent source of lean protein. Including oysters in your diet not only benefits your health but also supports local marine ecosystems due to their ability to filter water. - Mackerel:
Mackerel is another fish that boasts high levels of omega-3 fatty acids, along with vitamin D, vitamin B12, and selenium. This flavorful fish is considered a sustainable choice and offers numerous health benefits. - Rainbow Trout:
Rainbow trout is a deliciously mild-flavored fish that is packed with omega-3 fatty acids, protein, vitamin B12, and iron. It is a sustainable choice, particularly when sourced from responsible fish farms. - Clams:
Clams are an excellent source of protein, vitamin B12, iron, and selenium. They are sustainable, low in contaminants, and make a versatile addition to dishes like pasta, chowders, and stir-fries. - Herring:
Herring is an oily fish that delivers a healthy dose of omega-3 fatty acids, vitamin D, and vitamin B12. It is an eco-friendly choice and can be enjoyed smoked, pickled, or grilled. - Cod:
Cod is a lean white fish that provides protein, vitamin B12, selenium, and phosphorus. It is known for its mild flavor and versatility in cooking methods. - Shrimp:
Shrimp is low in calories and rich in protein, vitamin D, and selenium. Choose sustainably sourced shrimp to minimize environmental impact and ensure a healthier choice. - Anchovies:
Anchovies may be small in size, but they are big in nutritional value. These tiny fish deliver omega-3 fatty acids, calcium, and vitamins D and E. They are also a sustainable choice when sourced responsibly.
When it comes to the healthiest seafood options, there is an abundance of choices that offer an array of essential nutrients while also being environmentally responsible. Sardines, salmon, oysters, mackerel, rainbow trout, clams, herring, cod, shrimp, and anchovies are all fantastic choices to boost your overall health while supporting sustainable fishing practices. Incorporate these nutrient powerhouses into your diet and savor the benefits they provide for your well-being and the planet.
What are the Risks of Eating Seafood?
Although seafood is a nutritious option to fulfill dietary nutrient gaps, there are some environmental and health concerns related to its consumption.
Seafood may contain toxins, viruses, parasites, and bacteria that can be harmful if consumed. To avoid getting sick, it is essential to cook fish and shellfish thoroughly. As per the USDA guidelines, most seafood should be cooked to an internal temperature of 145 degrees Fahrenheit.
Contaminants, including Mercury and Others
Overconsumption of certain seafood varieties can have negative health effects due to the presence of contaminants. For instance, specific fish species contain high levels of mercury, a heavy metal that can be easily absorbed by the body. Mercury accumulation is more common in larger fish, as they consume smaller fish that have ingested mercury-rich plankton. Consequently, larger and older fish are typically the most mercury-contaminated.
Regularly consuming foods high in mercury can result in mercury accumulation in the body, leading to health problems like high blood pressure, heart attack, and developmental delay in offspring. Mercury is toxic and can have detrimental effects on the body.
Mercury can have a greater impact on certain groups, such as pregnant and breastfeeding women, as well as children, who are more susceptible to its effects.
To reduce the amount of mercury in your diet, avoid consuming seafood like shark, certain types of tuna, swordfish, tilefish, and king mackerel as they have high mercury levels. Instead, opt for low-mercury options such as trout, cod, oysters, clams, herring, salmon, and sardines.
Recommendations for Incorporating Seafood into Your Eating Plan
Eating seafood can boost the quality of your diet and support and protect your health. However, it’s important to consider the nutrition and environmental impact of seafood when narrowing down options to add to your diet.
Adding seafood to your diet can boost its nutritional quality and promote your overall health. However, it is essential to consider the nutritional composition and environmental impact of various seafood options before including them in your meals.
Read the article in Health titled Healthiest Seafood Options, Ranked for further insight into the topic. https://www.health.com/healthiest-seafood-8630471
https://stmdailynews.com/category/food-and-beverage/
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