'Smart' Tattoos Could Monitor Your Blood Sugar

Harvard University, YouTube
Harvard University, YouTube

Wearable health-monitoring devices are nothing new, but consumer-grade models are usually limited in function and have a cool factor usually associated with mall walkers.

Now, there's some new hope on the horizon: a tattoo ink that's able to provide its owner with real-time health assessments.

According to Nerdist and first reported by the Harvard Gazette, researchers at Harvard and MIT have broken ground—or technically, skin—on a procedure that uses a special kind of ink to evaluate certain health markers. This "smart" tattoo ink can assess an individual’s blood sugar level, a benefit to diabetics; another biosensor tattoo can measure dehydration levels. If the ink detects a shift, it changes colors. (Nerdist calls it a "mood ring" for your health.)

The project, dubbed "DermalAbyss," was mounted when postdoctoral fellows at both universities wanted to address drawbacks in current wearable health tech. Battery life is one factor; wireless connectivity is another. But "smart" ink doesn't need either. The ink responds to changes in the wearer's interstitial fluid, which can provide information on glucose levels and sodium concentration.

The researchers note that they'll need to continue to experiment with the ink (currently being tested on pig skin) to make sure it doesn't diffuse or fade. For people who might want the benefits of such monitoring without having a portrait on their arm, the team also suggests an "invisible" ink that can be seen only when observed under the light of a smartphone. 

[h/t Nerdist]

Pioneering Heart Surgeon René Favaloro Is Being Honored With a Google Doodle

Dr. René Favaloro (left) pictured with colleague Dr. Mason Sones.
Dr. René Favaloro (left) pictured with colleague Dr. Mason Sones.
The Cleveland Clinic Center for Medical Art & Photography, Wikimedia Commons // CC BY 4.0

Argentinian heart surgeon René Favaloro is the subject of today’s Google Doodle, which features a sketched portrait of the doctor along with an anatomical heart and several medical tools, The Independent reports.

The renowned doctor was born on this day in 1923 in La Plata, the capital of Argentina’s Buenos Aires province, and pursued a degree in medicine at La Plata University. After 12 years as a doctor in La Pampa, where he established the area’s first mobile blood bank, trained nurses, and built his own operating room, Favaloro relocated to the U.S. to specialize in thoracic surgery at the Cleveland Clinic.

In 1967, Favaloro performed coronary bypass surgery on a 51-year-old woman whose right coronary artery was blocked, restricting blood flow to her heart. Coronary bypass surgery involves taking a healthy vein from elsewhere in the body (in this case, Favaloro borrowed from the patient’s leg, but you can also use a vein from the arm or chest), and using it to channel the blood from the artery to the heart, bypassing the blockage. According to the Mayo Clinic, it doesn’t cure whatever heart disease that caused the blocked artery, but it can relieve symptoms like chest pain and shortness of breath, and it gives patients time to make other lifestyle changes to further manage their disease.

Favaloro wasn’t keen on being called the “father” of coronary bypass surgery, but his work brought the procedure to the forefront of the clinical field. He moved back to Argentina in 1971 and launched the Favaloro Foundation to train surgeons and treat a variety of patients from diverse economic backgrounds.

Favaloro died by suicide on July 29, 2000, at the age of 77, by a gunshot wound to the chest. His wife had died several years prior, and his foundation had fallen deeply into debt, which Argentinian hospitals and medical centers declined to help pay, The New York Times reported at the time.

“As a surgeon, Dr. Favaloro will be remembered for his ingenuity and imagination,” his colleague Dr. Denton A. Cooley wrote in a tribute shortly after Favaloro’s death. “But as a man ... he will be remembered for his compassion and selflessness.” Today would have been his 96th birthday.

[h/t The Independent]

A Simple Way to Cure Brain Freeze Quickly

vitapix/iStock via Getty Images
vitapix/iStock via Getty Images

As one of life’s simple pleasures, ice cream should not have the capacity to cause spontaneous and agonizing pain immediately after ingestion. Yet ice cream and other extremely cold food frequently catches us off-guard by inciting what is known as “brain freeze” or “ice cream headache.” Fortunately, there’s a way to alleviate this harsh side effect.

According to Johns Hopkins University, a bout of radiating pain in your head after eating cold food is known as cold neuralgia or sphenopalatine ganglioneuralgia. It’s likely caused by your body entering survival mode when it detects a freezing temperature on the palate (roof) of the mouth: our system constricts blood vessels in the palate to preserve our core temperature. When they rapidly open back up, a pain signal is sent to the brain via the trigeminal nerve. Since that nerve leads directly to the midface and forehead, your face bears the brunt of the referred pain from the mouth.

A brain freeze typically lasts less than five minutes. But when your head is throbbing, that can feel like forever. To minimize the pain, the best strategy is to warm the palate up. You can do this by pressing your tongue or a thumb against the roof of your mouth, by drinking a warm liquid, or both. Covering your face and breathing into your hands can also warm the air inside your mouth that was chilled by the ice cream.

If you want to take preventive measures, avoid gulping cold drinks and take smaller bites. Holding the ice cream in your mouth to warm it before swallowing can also reduce the potential for a painful end to your cone or slushy drink.

[h/t Johns Hopkins Medicine]

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