Blood Monitor Illustration (IMAGE) University of Central Florida Caption Light introduced through an optical fiber can determine whether a patient's blood is coagulating by measuring the vibration of red blood cells. Credit Andrii Pshenychnyi Usage Restrictions None License Licensed 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.