A device for emergency transport of pediatric patients that safely and efficiently transports a pediatric patient to a medical facility. The display element comprises a first electrode, a luminescent layer, a second electrode, and a transparent substrate. A sensor may selectively absorb light near a region of tissue having relatively large subcutaneous anatomic structures, such as large blood vessels, and selectively reflect light near a region of tissue that is relatively free of large blood vessels or other structures. The resulting high resistance contacts have highly linear I-V curves, even at high voltages. Furthermore, the location server can choose to terminate the session if the terminal does not support any of the requested shapes.