A wireless, bioelectronic pacifier could eliminate the need for invasive, twice-daily blood draws to monitor babies' electrolytes in Newborn Intensive Care Units or NICUs. This smart pacifier can also provide more continuous monitoring of sodium and potassium ion levels. These electrolytes help alert caregivers if babies are dehydrated, a danger for infants, especially those born prematurely or with other health issues. Researchers tested the smart pacifier on a selection of infants in a hospital, and the results were comparable to data gained from their normal blood draws.