Blood testing via sound waves may replace some tissue biopsies

Cells secrete nanoscale packets called exosomes that carry important messages from one part of the body to another. Scientists from MIT and other institutions have now devised a way to intercept these messages, which could be used to diagnose problems such as cancer or fetal abnormalities.

This schematic shows a microfluidic device that uses sound waves to separate exosomes (pink spheres) from other components of blood.   Courtesy of Mengxi Wu, Ming Dao, Subra Suresh, Yoel Sadovsky and Tony Jun Huang

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