In our model, pulmonary edema formation preceded neutrophil granulocyte infiltration to lung parenchyma during mechanical ventilation, suggesting that permeability changes can also take place without significant inflammation.
Patients with persistently elevated PEEP (≥7.5 cm H2O) or FiO2 (≥70%) during the first three days of mechanical ventilation (suggesting intubation for a severe, progressive respiratory disorder) were only eligible if they subsequently stabilized and only required minimal ventilator support (PEEP ≤5 cm H2O and FiO2 ≤40%) for ≥2 days.
Moreover, they required more mechanical ventilation suggesting that they were more seriously ill whereas the SAPS II score was similar.
The observed association between TwPdi and duration of mechanical ventilation suggests that a major decrease in TwPdi may occur very early, in the first days of mechanical ventilation.
ARDS occurs early in the course of mechanical ventilation, suggesting that ARDS-prevention trials should occur early in the course of mechanical ventilation, such as in the emergency department.
Between-group differences in hospital LOS remained significant in the subset of patients who survived or died seven or more days after stopping mechanical ventilation, suggesting that the difference was not due to an imbalance in mortality.
Actually, a recent comparison between tidal volume and outcome done on 29,343 patients who underwent general anesthesia with mechanical ventilation suggests that the ideal tidal volume is somewhere between 8 and 10 ml/kg [ 11].
The fact that there was still significant variation among hospitals in the use of surfactant when we used the ICD-9-CM diagnosis code to identify infants with RDS and when we restricted the population to only those infants requiring mechanical ventilation suggests that true variation exists.
Finally, the authors identified the SFTPA2 haplotype 1A to be protective for a number of indicators (acute respiratory failure, acute respiratory distress syndrome, PaO2/FiO2 ratio, and mechanical ventilation), suggesting that this variant may be examined for future therapy against pandemic H1N1.
Data from studies performed in critically ill patients receiving prolonged mechanical ventilation also suggest that use of GABA-agonists, such as benzodiazepines, is associated with an increased risk of brain dysfunction [44].
