smartphone blood-clotting test 3 (IMAGE) University of Washington Caption Researchers at the University of Washington have developed a new blood-clotting test that uses only a single drop of blood and a smartphone vibration motor and camera. Shown here are lead author Justin Chan (left, holding the device), a UW doctoral student in the Paul G. Allen School of Computer Science & Engineering, and co-author Dr. Kelly Michaelsen (right), assistant professor of anesthesiology and pain medicine in the UW School of Medicine. Credit Mark Stone/University of Washington Usage Restrictions for reuse with appropriate credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.