Breaking News
November 14, 2018 - Study defines biomarker in response to treatment of castration-resistant prostate cancer
November 14, 2018 - Study identifies potential therapeutic strategy for patients with clear cell renal cancer
November 14, 2018 - Bausch Health Announces U.S. Launch of Bryhali (halobetasol propionate) Lotion, 0.01%, for Plaque Psoriasis In Adults
November 14, 2018 - Alpha Fetoprotein (AFP) Tumor Marker Test: MedlinePlus Lab Test Information
November 14, 2018 - Researchers evaluate controversial treatment for Parkinson’s disease psychosis
November 14, 2018 - AI could help veterinarians code their notes
November 14, 2018 - Pre-schoolers with autism thrive in mainstream classroom settings
November 14, 2018 - Complementary and alternative medicine is widely used by general population in England
November 14, 2018 - Study reveals link between tobacco availability and smoking during pregnancy
November 14, 2018 - Purdue researchers develop translucent base for silicon patches to deliver exact doses of biomolecules
November 14, 2018 - New technology based on moths and magnets could help treat genetic diseases
November 14, 2018 - Concussion-Related Biomarkers Vary Based on Sex, Race
November 14, 2018 - One more year of high school may shape waistlines later in life
November 14, 2018 - Dissecting high drug costs – Scope
November 14, 2018 - Study shows novel strategy to reduce breast cancer bone metastasis
November 14, 2018 - Empowering the NHS through Industry Partnerships
November 14, 2018 - One size does not fit all in obesity treatment, study finds
November 14, 2018 - Seeking ways to prevent ‘secondary cataracts’
November 14, 2018 - Change Within the Eye May Be Early Warning for Macular Degeneration
November 14, 2018 - Study of 500,000 people clarifies the risks of obesity
November 14, 2018 - Ultrasound releases drug to alter activity in targeted brain areas in rats | News Center
November 14, 2018 - Umass Amherst researchers battle against youth suicide in rural Alaska Native communities
November 14, 2018 - Cancer stem cells depend on amino acid metabolism, and it’s proving to be their Achilles’ heel
November 14, 2018 - Epigenetic link found between prenatal exposure to maternal smoking and offspring’s cardio-metabolic health
November 14, 2018 - Meditation, music may change biomarkers of cellular aging and Alzheimer’s disease in older adults
November 14, 2018 - Multidisciplinaryresearch teams selected to study age-related brain disorders
November 14, 2018 - The Current issue of “The view from here” is concerned with Informatics
November 14, 2018 - Researchers identify tool to help transgender women have a more authentic voice
November 14, 2018 - Four faculty members appointed to endowed professorships | News Center
November 13, 2018 - Research finds strongest evidence yet that obesity causes depression
November 13, 2018 - Researchers compare stools of breastfed and formula-fed infants
November 13, 2018 - Entasis Therapeutics Announces Zoliflodacin Phase 2 Results Published in The New England Journal of Medicine
November 13, 2018 - Gene changes driving myopia reveal new focus for drug development
November 13, 2018 - $6 million grant to support study of preeclampsia, atherosclerosis links | News Center
November 13, 2018 - Beneficial gut microbes metabolize high-fiber diet to improve heart health in mouse model
November 13, 2018 - Excessive use of social media through visual postings linked to increase in narcissistic traits
November 13, 2018 - Study finds why obesity both fuels cancer growth and helps immunotherapy to kill tumors
November 13, 2018 - Women prefer and invest more in daughters, while men favor sons
November 13, 2018 - With hospitalization losing favor, judges order outpatient mental health treatment
November 13, 2018 - Transgenic rat model may provide new insights into cerebral amyloid angiopathy
November 13, 2018 - Study identifies factors tied to greater risk of advanced liver disease in cystic fibrosis patients
November 13, 2018 - Risk of blindness among premature babies with low levels of blood platelets
November 13, 2018 - A new strategy for combatting antibiotic-resistant infections
November 13, 2018 - Study aims to find which outreach method is more effective at improving cancer screening rates
November 13, 2018 - Insufficient sleep duration linked with unhealthy lifestyle profile among children
November 13, 2018 - IIASA researchers introduce new, simple measure for human wellbeing
November 13, 2018 - Magnetic nanosprings used as targeted drug delivery agents for anticancer therapy
November 13, 2018 - Scientists examine FCMs containing silver nanoparticles
November 13, 2018 - Failed DNA repair triggers chromosomal chaos
November 13, 2018 - Study shows new emerging role of osteopontin in HCV-related hepatocellular carcinoma
November 13, 2018 - Food insecurity during pregnancy linked to severity of neonatal abstinence syndrome
November 13, 2018 - Majority of Americans are concerned about health threat posed by antibiotic resistance
November 13, 2018 - Addition of Elotuzumab Ups PFS in Refractory Multiple Myeloma
November 13, 2018 - Study finds women with pregnancy-related nausea, vomiting use marijuana more
November 13, 2018 - Lethal heart rhythm more likely to be found in patients with common heart failure
November 13, 2018 - Study provides new clues to origin and development of multiple sclerosis
November 13, 2018 - Climate change could pose threat to male fertility
November 13, 2018 - Researchers discover how mitochondria deploy a powerful punch against disease-causing bacteria
November 13, 2018 - AHA: Traumatic Childhood Could Increase Heart Disease Risk in Adulthood
November 13, 2018 - Feeling the Burn? | NIH News in Health
November 13, 2018 - Women’s birth canals in Kenya, Korea, Kansas not the same: study
November 13, 2018 - Fecal microbiota transplantation effective against ICI-associated colitis
November 13, 2018 - New physical activity guidelines released that urge people to “move more”
November 13, 2018 - Angiotensin receptor blockers improve sodium excretion in blacks
November 13, 2018 - New project seeks to address alarming injury rate in youth footballers
November 13, 2018 - Fish oil or omega 3 fatty acid supplements can prevent heart attacks finds study
November 13, 2018 - The Human Heart-in-a-Jar That Could One Day Replace Animal Testing
November 13, 2018 - Treat patients’ partners without a doctor visit
November 13, 2018 - Belgian beer landscape mapped using scientific insights
November 13, 2018 - ‘Master key’ gene has links to both ASD and schizophrenia
November 13, 2018 - Gladstone scientists gain new insights into the aging brain
November 13, 2018 - Drug therapy can improve outcomes for acutely ill heart patients
November 13, 2018 - Three landmark studies provide better understanding of sudden cardiac arrest
November 13, 2018 - Cholesterol control revised in the latest AHA/ACC guidelines
November 13, 2018 - Vulnerable young teenagers urgently need better sex education, say researchers
November 13, 2018 - Breakthrough research reveals how deadly pneumococcus avoids immune defenses
November 13, 2018 - Researchers discover possible path forward in preventing cancers tied to two viruses
November 13, 2018 - Wishes can help pediatric patients to get better over time
November 13, 2018 - Janssen Reports Positive Topline Results for FLAIR Phase 3 Study of a Novel, Long Acting Injectable Two-Drug Regimen for the treatment of HIV-1
November 13, 2018 - Experimental compound reduces Gulf War illness-like behavior in mice
New flexible sensor can map blood-oxygen levels over large areas of the body

New flexible sensor can map blood-oxygen levels over large areas of the body

image_pdfDownload PDFimage_print

Berkeley — Injuries can’t heal without a constant influx of blood’s key ingredient — oxygen.

A new flexible sensor developed by engineers at the University of California, Berkeley, can map blood-oxygen levels over large areas of skin, tissue and organs, potentially giving doctors a new way to monitor healing wounds in real time.

“When you hear the word oximeter, the name for blood-oxygen sensors, rigid and bulky finger-clip sensors come into your mind,” said Yasser Khan, a graduate student in electrical engineering and computer sciences at UC Berkeley. “We wanted to break away from that, and show oximeters can be lightweight, thin and flexible.”

The sensor, described this week in the journal Proceedings of the National Academy of Sciences, is made of organic electronics printed on bendable plastic that molds to the contours of the body. Unlike fingertip oximeters, it can detect blood-oxygen levels at nine points in a grid and can be placed anywhere on the skin. It could potentially be used to map oxygenation of skin grafts, or to look through the skin to monitor oxygen levels in transplanted organs, the researchers say.

“All medical applications that use oxygen monitoring could benefit from a wearable sensor,” said Ana Claudia Arias, a professor of electrical engineering and computer sciences at UC Berkeley. “Patients with diabetes, respiration diseases and even sleep apnea could use a sensor that could be worn anywhere to monitor blood-oxygen levels 24/7.”

Existing oximeters use light-emitting diodes (LEDs) to shine red and near-infrared light through the skin and then detect how much light makes it to the other side. Red, oxygen-rich blood absorbs more infrared light, while darker, oxygen-poor blood absorbs more red light. By looking at the ratio of transmitted light, the sensors can determine how much oxygen is in the blood.

These oximeters only work on areas of the body that are partially transparent, like the fingertips or the earlobes, and can only measure blood-oxygen levels at a single point in the body.

“Thick regions of the body, such as the forehead, arms and legs, barely pass visible or near-infrared light, which makes measuring oxygenation at these locations really challenging,” Khan said.

In 2014, Arias and a team of graduate students showed that printed organic LEDs can be used to create thin, flexible oximeters for fingertips or earlobes. Since then, they have pushed their work further, developing a way of measuring oxygenation in tissue using reflected light rather than transmitted light. Combining the two technologies let them create the new wearable sensor that can detect blood-oxygen levels anywhere on the body.

The new sensor is built of an array of alternating red and near-infrared organic LEDs and organic photodiodes printed on a flexible material. The team used the sensor to track the overall blood-oxygen levels on the forehead of a volunteer who breathed air with progressively lower concentrations of oxygen — similar to going up in altitude — and found that it matched those using a standard fingertip oximeter. They also used the sensor to map blood-oxygen levels in a three-by-three grid on the forearm of a volunteer wearing a pressure cuff.

“After transplantation, surgeons want to measure that all parts of an organ are getting oxygen,” Khan said. “If you have one sensor, you have to move it around to measure oxygenation at different locations. With an array, you can know right away if there is a point that is not healing properly.”

Source:

Skin-like sensor maps blood-oxygen levels anywhere in the body

Tagged with:

About author

Related Articles