Microneedle Smart Patch for Thrombosis (IMAGE) North Carolina State University Caption The thrombin-responsive microneedle patch is made of heparin-modified hyaluronic acid. Credit Yuqi Zhang 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.