Two new sensor-based early detection tools for diabetic foot ulcers are being developed.
Orpyx Medical Technologies has developed a wristwatch and shoe insert. An insole is designed to support the foot, with three separate foam layers. Eight tiny electronic sensors are packed in the top of the insole so that they rest against thesurface of the foot once the shoe has been put on. These sensors are programmed to detect when pressure exceeds predetermined levels at certain points of the foot that are most susceptible to ulcers. Once they do, they wirelessly transmit a warning to the watch, which immediately sounds an alert.
Cambridge based Podimetrics is developing a home-monitoring bath mat with sensors that record changes in blood flow patterns when a diabetic patient steps on the mat. The sensors scan the foot to collect data about blood flow and send the data to the cloud to be stored and analyzed. The company’s algorithms look at that data in two ways: longitudinally over time and comparatively between the left and right foot to detect patterns that may indicate the presence of a developing ulcer. When the algorithms detect a pre-ulcer, an alert is sent to the patient and his doctor prompting an intervention early on.