Tiny wireless implant detects oxygen deep within the body

Engineers have created a tiny wireless implant that can provide real-time measurements of tissue oxygen levels deep underneath the skin. The device, which is smaller than the average ladybug and powered by ultrasound waves, could help doctors monitor the health of transplanted organs or tissue and provide an early warning of potential transplant failure.

source https://www.sciencedaily.com/releases/2021/04/210414154912.htm