John Rogers and his colleagues at the University of Illinois at Urbana-Champaign created an electronic circuit that can be applied to the skin, where it monitors a number of biological functions, sending the results via wireless communication. Referred to as epidermal electronics, the patch is designed to help monitor brain, heart, or muscle function without the duress of getting hooked up to big machines in a hospital.
According to the ACS, the latest iterations are bi-directional. Previously, medical professionals could only read data. Newer versions can, for example, take muscle data and provide stimulus, which can come in useful for rehabilitation. Plans are in place to add Wi-Fi support for sending data to a physician remotely.