Wireless, Miniaturized Implantable Devices use Ultrasound to Track Body Processes Written by AZoNanoMay 12 2021 Implantable medical devices are extensively used to support and improve physiological functions, track and map biological signals, and treat various diseases. These devices are revolutionizing healthcare and enhancing the quality of life for scores of individuals. Chips are shown in the tip of a hypodermic needle. Columbia Engineers develop the smallest single-chip system that is a complete functioning electronic circuit; implantable chips visible only in a microscope point the way to developing chips that can be injected into the body with a hypodermic needle to monitor medical conditions. Image Credit: Chen Shi/Columbia Engineering.