Blocked Vein (image) University of Washington Caption In this image the cosmetic filler (green) is shown blocking a major vein in a mouse ear. This scenario can happen in human faces during facelift procedures. Credit Siavash Yousefi, U of Washington Usage Restrictions Photo credit required. 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.