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  • Title: Optimal positive end-expiratory pressure during pumpless extracorporeal lung membrane support.
    Author: Jungebluth P, Iglesias M, Go T, Sibila O, Macchiarini P.
    Journal: Artif Organs; 2008 Nov; 32(11):885-90. PubMed ID: 18959682.
    Abstract:
    The aim of this study was to determine the optimal positive end-expiratory pressure (PEEP) required during extracorporeal lung membrane support (interventional lung assist [iLA]; Novalung GmbH, Hechingen, Germany). Twenty healthy pigs were initially (4 h) mechanically ventilated with a tidal volume (V(T)) of 10 mL/Kg, respiratory rate (RR) of 20 breaths/min, PEEP of 5 cm H(2)O, and fraction of inspired O(2) (FiO(2)) of 1.0. Thereafter, the iLAs were placed arteriovenously transfemorally and settings reduced to reach near static ventilation (V(T) < or = 2 mL/Kg, RR 4 breaths/min, PEEP of 5, FiO(2) 1.0). Then, animals were assigned to four study groups evaluating 5 cm H(2)O increasing levels of PEEP for 8 h. Gas exchanges with PEEP < or = 10 cm H(2)O were significantly worse than those with PEEP > 12 cm H(2)O, and this without hemodynamical imbalance. This study suggests that the iLA may provide adequate gas exchange during static ventilation only with PEEP levels > 10 cm H(2)O, and this without pulmonary or systemic hemodynamic imbalance.
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