Tiny Blocks And Posts In The Microfluidic Device That Can Measure Platelet Function (image) University of Washington Share Print E-Mail Caption Tiny blocks and posts in the microfluidic device activate platelets and measure their health. This image was taken on a scanning electron microscope, and the block is 15 microns tall, or about one-tenth the thickness of a piece of paper. Credit University of Washington Usage Restrictions For use with appropriate credit. Share Print E-Mail 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.