Blood-Oxygen Sensor Blends Optoelectronic Technologies

The development of a blood-oxygen sensor (that clips onto your finger) eliminated the need for costly, risky, time-consuming invasive measurements that required drawing of blood and provides accurate results in real-time. Modern optoelectronics technologies have made “medicine” much more accessible, quicker, and safer.

However, the blood-oxygen sensor can only measure oxygen saturation in the circulatory system just below the skin. Doctors may need to monitor that oxygen parameter deep inside the body to assess the health of transplanted organs or tissue to provide an early warning of potential transplant failure, for example.

Now, researchers have created a tiny, non-RF wireless implant. It can provide real-time measurements of tissue oxygen-saturation levels deep underneath the skin to solve this sensing problem. The complete device has a volume of just 4.5 mm3 (critical for injectable implants). It derives power from ultrasound energy waves. The entire implant manufacturing took place with standard medical-implant processes, despite its array of component types.

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