Fig. 3
From: Impact of prolonged assisted ventilation on diaphragmatic efficiency: NAVA versus PSV
Main breathing pattern and diaphragm electrical activity (EAdi) parameters recorded each 4 hours in the two groups of patients, ventilated in neurally adjusted ventilatory assist (NAVA) or pressure support ventilation (PSV). The neural inspiratory time (Ti NEUR ) was significantly lower in the PSV than in the NAVA group (F = 9.85; p = 0,007). The peak diaphragm electrical activity (EAdiPEAK) was significantly higher in the NAVA than in the PSV group (F = 4.83; p = 0,045). *Significant difference between PSV and NAVA (analysis of variance model). ΔP AO assistance level (peak airway pressure – positive end-expiratory airway pressure), VT tidal volume, PBW predicted body weight, RR MECH mechanical respiratory rate, Ti MECH mechanical inspiratory time