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A tiny, paper-thin skin patch to collect vital information, called the Bio-patch sensor, has been developed by researchers at Stockholm's KTH Royal Institute of Technology. It is inexpensive, versatile, and comfortable to wear.

Geng Yang, a researcher at KTH, says that the Bio-patch measures bioelectrical signals through the skin, gathering data on different parts of the body depending on where it is placed.

"On the chest it provides electrocardiography (ECG), on the skull it measures brainwaves (EEC), and on the forearm it can measure muscle response to stimulation from the nervous system (EMG)," he says. It also has a built-in sensor that constantly monitors body temperature.

With a wireless connection, the patient can analyze the readings in their smartphone, or send the data via internet to a healthcare professional for diagnosis.

A paper thin battery energy source in the Bio-patch helps make the patch comfortable and as small as possible. The electronic components are mounted on a flexible foil, making it easy to attach to the skin and to wear comfortably, and it can be discarded after use.

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