A TechnicianOnline.com report notes that the iBionicS lab is developing a smart bandage device to monitor sleep in collaboration with the Duke Medical Center.

The bandage works by using a light-emitting diode, or LED, which emits photons at two wavelengths red and near infrared, the photons couple with tissue and are refracted back at different wavelengths depending on the oxygenation of the blood. The wavelengths of the returning photons show the oxygenation level of the blood which indicates the quality of sleep.