Blood flow observed with smartphone-ultracompact wearable blood flow sensor

Abstract

The flow of blood that circulates through the entire human body and supports life changes dynamically with our emotional and physical state and reveals a huge amount of information. If the flow of blood could be easily visualized in our daily lives, we could expect to see a range of useful applications in areas such as health, beauty, and sports. In this article, we introduce an ultracompact, wearable blood flow sensor that is linked to a smartphone, making it possible to view the flow of blood anywhere and at any time.