“We were excited when we validated this location. Being able to use your fingertip makes our approach much easier and more accessible,” said Chandrasekhar, lead author of the study published in the journal Science Translational Medicine. The approach uses two sensors: an optical sensor on top of a force sensor. The sensor unit and other circuitry are housed in a one centimeter-thick case attached to the back of the phone.
Scientists, including those of Indian-origin, have developed a new smartphone app and hardware that could help measure blood pressure more accurately than existing cuff devices. The team, from Michigan State University in the US, also discovered a more convenient measurement point. “We targeted a different artery, the transverse palmer arch artery at the fingertip, to give us better control of the measurement,” said Anand Chandrasekhar, doctoral student at MSU.