Results: The early phase, with lower dynamic lung compliance, required a higher level of ventilator support, not positive end-expiratory pressure, than the recovery phase. V d,an and V Awere measured in infants with respiratory disorders, immediately after intubation (early phase) and subsequently when they were clinically stable (recovery phase). We adjusted respiratory settings to maintain appropriate oxygenation and tidal volume (V T), and performed V cap based on waveforms of ventilator graphics and capnograms. Methods: This study enrolled twenty-five ventilated infants (mean birth weight, 2,220 ± 635 g mean gestational age, 34.7 ± 3.3 weeks). Objective: The aim of this study was to determine the differences in V d,an and V A in ventilated infants between the early and recovery phases of respiratory distress using volumetric -capnography (V cap) based on ventilator graphics and capnograms. Background: Few studies have reported the measurement of anatomical dead space (V d,an) and alveolar tidal volume (V A) in ventilated neonates with respiratory distress.
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