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Figure 2 | BMC Pediatrics

Figure 2

From: Respiratory support by neurally adjusted ventilatory assist (NAVA) in severe RSV-related bronchiolitis: a case series report

Figure 2

Screenshot with trends over 24 hours (case 1). In the window untitled "Courbes de tendances" (Trend curves), three panels report trends over 24 hours of peak inspiratory pressure (cm H2O), respiratory rate (resp/mn), and minute volume (l/min). On the right of these panels, the values of these ventilatory parameters were collected to the vertical bar (at 18:57 while the child was not receiving NAVA). The downward vertical arrow indicates the switch from SIMV to NAVA (at 20:30). Outside the window untitled "Courbes de tendances", on the right of the scrennshot, ventilatory parameters were collected the next day at 10:15 while the child was receiving NAVA. The upper pannel showed a decrease in peak inspiratory pressure after the switch of ventilation. The middle pannel showed the extreme variability of the respiratory ratein NAVA (the white area under the curve corresponds to the mandatory respiratory rate, while the black area corresponds to the spontaneous respiratory rate). The lower pannel showed minute volume that remained unchanged. When comparing values of ventilatory parameters in SIMV (at 18:57) with those in NAVA (next day at 10:15), peak inspiratory pressure decreased from 29 to 6 cm H2O, mean airway pressure decreased from 10 to 4 cm H2O, spontaneous respiratory rate varied from 0 to 29 breaths/min. Abbreviations: SIMV, synchronized intermittent mandatory ventilation; PEP, positive end-expiratory pressure; P crête, peak inspiratory pressure; P moyen, mean airway pressure; FR spont, spontaneous respiratory rate; F resp, respiratory rate; VM, minute volume; FiO2, fraction of inspired oxygen.

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