New wearable device to monitor tumour size

Engineers have created a small, autonomous device with a stretchable and flexible sensor that can be adhered to the skin to measure the changing size of tumours below. The non-invasive, battery-operated device is sensitive to 10 micrometres and can beam results to a smartphone app wirelessly in real time with the press of a button.

In practical terms, the researchers say, their device represents a wholly new, fast, inexpensive, hands-free, and accurate way to test the efficacy of cancer drugs.

Based on studies with mice, the researchers say that the new device offers at least three significant advances. First, it provides continuous monitoring, as the sensor is physically connected to the mouse and remains in place over the entire experimental period. Second, the flexible sensor enshrouds the tumour and is therefore able to measure shape changes that are difficult to discern with other methods. Third, FAST is both autonomous and non-invasive. It is connected to the skin—not unlike an adhesive bandage—battery operated, and connected wirelessly.