![]() The wearer may even forget they have it on. The 3,600 liquid crystals sit on a flexible material that stretches, compresses and twists with the skin. We can measure lots of electrical signals associated with activity in the brain, the heart, the skeletal muscles," said Rogers. The versatile tattoo can do more than take temperature, though. The heart beat tattoo, also referred to as the EKG line tattoo, looks exactly like the little monitor with the irregular line bouncing up and down you see. Using a special smartphone app, you can snap a photo of the patch and the temperature data is translated into a health report - all within thirty seconds. "That color difference will allow you to be able to map your blood flow, different veins, and tell you about your cardiac health and different physiological things in your body," said Anthony Banks, an engineer at the University of Illinois. Thousands of new, high-quality pictures added every day. If it changes color, you know you have a problem. Find Heart Beat Monitor Pulse Line Art stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. You can place it on your neck or on your arm and leave it there for two weeks. Temperature changes detected across the liquid crystals can signal increases and decreases in blood flow, skin hydration and heart rate. "This patch is composed of liquid crystals that change color with temperature," said Huang. The tattoo measures blood flow rates by responding to temperature changes in the body. To this end, engineers at the University of Texas at Austin had developed an electronic tattoo that can be placed on the skin to measure various body responses. "Once your blood flow rate changes, it may be an indication of a heart condition." ![]() "Blood flow rate by itself is a very important measurement," said Yonggang Huang, an engineer at Northwestern University in Evanston, Illinois. The stick-on tattoo could monitor heart health by measuring the body's blood flow through the skin. "It's kind of the next-generation wearable technology - technology that by virtue of its intimate contact with the skin could provide clinical-quality data," said Rogers. But instead of just art - this tattoo is also science! Temporary tattoos recently have surged in popularity, as companies like Tattly add hefty doses of high design. "We think about it as a second skin layer," said John Rogers, a materials scientist and physical chemist at the University of Illinois at Urbana-Champaign. A new kind of temporary tattoo could become a kind of health monitor. (Inside Science TV) - Tattoos come in all shapes and sizes.
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