High blood pressure can lead to heart disease and stroke, but it often goes undetected and untreated. A new technology could change that by putting a simple blood pressure monitor in everyone’s pockets. Normally, blood pressure is measured using an inflatable cuff that presses down on an artery in the arm while a device records the effect on blood flow. Now, scientists have created a smartphone attachment that measures blood pressure directly from the finger, removing the need for any specialized equipment. The user places their finger on a pressure sensor and is guided by a chart displayed on the phone to gradually increase the applied force. Meanwhile, another sensor measures blood volume by illuminating the finger and detecting changes in how light is absorbed...More