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Neurally adjusted ventilatory assist for children on veno-venous ECMO.

NAVA may improve veno-venous ECMO weaning in children. This is a retrospective small series, describing for the first time proof-of-principle for the use of NAVA in children on VV ECMO. Six patients (age 1-48 months) needed veno-venous ECMO. Controlled conventional ventilation was replaced with assisted ventilation as soon as lung compliance improved, and could trigger initiation and termination of ventilation. NAVA was then initiated when diaphragmatic electrical activity (EAdi) allowed for triggering. NAVA was possible in all patients. Proportionate to EAdi (1.8-26 μV), initial peak inspiratory pressures ranged from 21 to 34 cm H2 O, and the tidal volume (Vt) from 3 to 7 ml/kg. During weaning, peak pressures increased proportionally to EAdi increase (5.2-41 μV), with tidal volumes ranging from 6.6 to 8.6 ml/kg. ECMO was weaned after a median time of 1.75 days on NAVA. Following ECMO weaning, the median duration of mechanical ventilation, and intensive care unit stay were 4.5 days, and 13.5 days, respectively. Survival to hospital discharge was 100%. In conclusion, combining NAVA to ECMO in paediatric respiratory failure is safe and feasible, and may help in a smoother ECMO weaning, since NAVA allows the patient to drive the ventilator and regulate Vt according to needs.

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