The Edi was multiplied was multiplied by the NAVA level to adjust the pressure assistance delivered to the child. The delivered pressure is equal to: NAVA level × (Edi max -Edi min) + PEEP. In clinical practice we usually started with a NAVA level of 1 cm H 2 O/μV that may have required adjustment if the Edi max signals deviated from a range between 5 and 20 μV. If the Edi signals turned out to be consistently greater than 20 μV, we increased the NAVA level until they are within this range. In the three reported cases, we did not need to do so.