Wearable blood flow monitor (IMAGE) University of California - San Diego Caption This soft, stretchy skin patch uses ultrasound to monitor blood flow to organs like the heart and brain. Credit Nature Biomedical Engineering Usage Restrictions Credit required 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.