In most automated devices, in order to inflate the cuff to a correct pre-determined pressure, the approximate range of the cuff size should be selected on the automated device (neonatal, paediatric or adult).

Some of the recent devices are adapted automatically to work with a variety of cuff sizes, including neonatal. An acoustical pressure pulse is generated at the monitor, propagated to and through the cuff, and back to a pressure transducer in the monitor. The total time of propagation is indicative of the cuff size being utilized.