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Figure 4 | Critical Care

Figure 4

From: High flow biphasic positive airway pressure by helmet – effects on pressurization, tidal volume, carbon dioxide accumulation and noise exposure

Figure 4

Effect of different ventilator respiratory settings on the mean airway pressure time product below PEEP (PTPPEEP) during HF-BiPAP, BiVent, and PSV ventilation. Data were measured in normal (compliance 90 ml/cmH2O, resistance 3 cm H2O/l/s), restrictive (compliance 30 ml/cmH2O, resistance 3 cmH2O/l/s), and obstructive lung conditions (compliance 90 ml/cmH2O, resistance 15 cmH2O/l/s) at low (2.5 cmH2O) and high inspiratory efforts (10 cmH2O) at a respiratory rate of 15 and 30 breaths per minute. BiVent = time-cycled pressure controlled switching between two continuous positive airway pressure levels; HF-BiPAP = high flow biphasic positive airway pressure; PEEP = positive end-expiratory pressure; PSV = pressure support ventilation.

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Critical Care

ISSN: 1364-8535