The pacifier uses a thin channel within the nipple to pull saliva into a detector. Inside, the glucose-oxidase (GOx) enzyme reacts with the glucose in the saliva and a Prussian Blue (PB) electrode transducer strip is used to detect the reaction. The strength of the electric current produced by the strip is indicative of the amount of glucose in the sample, and this measure is transmitted wirelessly to a smartphone or other device.
Although developed for newborns, the device has been only tried on adult patients with type 1 diabetes. The researchers were able to measure rising and dropping glucose levels as the patient volunteers, doubtless feeling silly at having to suck on a pacifier, assessed their glucose before and after meals.
Study in journal Analytical Chemistry: Pacifier Biosensor: Toward Noninvasive Saliva Biomarker Monitoring
Via: American Chemical Society