Heparin (IMAGE) American Chemical Society Caption Scientists report that using chitosan microspheres (above) could provide a safer alternative for heparin removal after surgery. Credit Karolina Zazakowny and Kamil Kaminski 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.