Wireless stick-on sensors promise unobtrusive health monitoring

The patches, developed at the University of Illinois at Urbana-Champaign and Northwestern University, are said to stick to the skin like a temporary tattoo and incorporate a microfluidic construction with folded wires to allow the patch to bend and flex without being constrained by rigid electronics components.

The patches could be used for routine health monitoring – wirelessly sending updates to a mobile phone or computer – and could prove beneficial when monitoring EKG and EEG readings, as the system doesn’t require wires, pads or tape.

‘We designed this device to monitor human health 24/7, but without interfering with a person’s daily activity,’ said Yonggang Huang, the Northwestern University professor who co-led the work with Illinois professor John A. Rogers. ‘It is as soft as human skin and can move with your body, but at the same time it has many different monitoring functions. What is very important about this device is it is wirelessly powered and can send high-quality data about the human body to a computer, in real time.’

According to a statement, the researchers did a side-by-side comparison with traditional electrocardiogram (EKG) and Electroencephalogram (EEG) monitors and found the wireless patch performed equally to conventional sensors, while being more comfortable for patients. Such a distinction is crucial for long-term monitoring, situations such as stress tests or sleep studies when the outcome depends on the patient’s ability to move and behave naturally, or for patients with fragile skin such as prematurely new born children.