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Tiny Wireless, Injectable Chips Use Ultrasound to Monitor Body Processes


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chips in the tip of a hypodermic needle

Chips in the tip of a hypodermic needle.

Credit: Chen Shi / Columbia University

Researchers at Columbia Engineering report that they have built a single-chip implantable or injectable medical device with a total volume of less than 0.1 mm3. The system is as small as a dust mite and visible only under a microscope. The team used ultrasound to both power and communicate with the device wirelessly.

The work is described in "Application of a Sub–0.1-mm3 Implantable Mote for In Vivo Real-Time Wireless Temperature Sensing," published in Science Advances.

The chip "is a complete functioning electronic system," says Ken Shepard, the Lau Family professor of electrical engineering and professor of biomedical engineering. "This should be revolutionary for developing wireless, miniaturized implantable medical devices that can sense different things, be used in clinical applications, and eventually approved for human use."

From Columbia University
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