PMC8919672_01
Ventilator graphics from a patient with severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2) pneumonia receiving volume control ventilation. Airway pressures (yellow
tracing) falling below PEEP during the inspiratory cycle. The electrical activity of the
diaphragm (EAdi; white tracing) shown in the bottom graphic and is superimposed over the
airway pressure tracing.
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PMC8919672_01_cjrt-2021-017-g001.jpg
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Despite the use of square waveform gas delivery with flow support, Figure 1 shows marked asynchrony with inspiratory pressure falling below PEEP during VT delivery and pressure spikes at the termination of the inspiratory phase. In Figure 1 the EAdi waveform is superimposed over the pressure waveform as a preview of what the pressure waveform might be when changed to the NAVA mode.
Ventilator graphics after the ventilator mode was changed to the neurally adjusted
ventilatory assist (NAVA) mode.
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Figure 2 shows the ventilator graphics after the change to the NAVA mode.