Multi tasking wearable device to monitor glucose, alcohol, and lactate level

Engineers at the University of California San Diego have developed a prototype of such a wearable device that can continuously monitor several health stats-glucose, alcohol, and lactate levels-simultaneously in real-time.

The device is about the size of a stack of six quarters. It is applied to the skin through a Velcro-like patch of microscopic needles, or microneedles, that are each about one-fifth the width of a human hair. Wearing the device is not painful-the microneedles barely penetrate the surface of the skin to sense biomolecules in interstitial fluid, which is the fluid surrounding the cells beneath the skin. The device can be worn on the upper arm and sends data wirelessly to a custom smartphone app.

The study is published in the Nature Biomedical Engineering journal. Most commercial health monitors, such as continuous glucose monitors for patients with diabetes, only measure one signal. The problem with that, the researchers said, is that it leaves out information that could help people with diabetes, for example, manage their disease more effectively.

Monitoring alcohol levels is useful because drinking alcohol can lower glucose levels. Knowing both levels can help people with diabetes prevent their blood sugar from dropping too low after having a drink. Combining information about lactate, which can be monitored during exercise as a biomarker for muscle fatigue, is also useful because physical activity influences the body's ability to regulate glucose.

The researchers hence concluded that with this wearable device, people can see the interplay between their glucose spikes or dips with their diet, exercise and drinking of alcoholic beverages. That could add to their quality of life as well.