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The American journal of medicine v.130 no.2, 2017년, pp.207 - 213   SCI SCIE
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High Positive End-Expiratory Pressure Is Associated with Improved Survival in Obese Patients with Acute Respiratory Distress Syndrome

Bime, Christian (Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Department of Medicine, University of Arizona College of Medicine, Tucson ); Fiero, Mallorie (Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson ); Lu, Zhenqiang (University of Arizona Health Sciences, Tucson ); Oren, Eyal (Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson ); Berry, Cristine E. (Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Department of Medicine, University of Arizona College of Medicine, Tucson ); Parthasarathy, Sairam (Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Department of Medicine, University of Arizona College of Medicine, Tucson ); Garcia, Joe G.N. (Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Department of Medicine, University of Arizona College of Medicine, Tucson );

  • 초록  

    Abstract Background In acute respiratory distress syndrome, minimizing lung injury from repeated collapse and reopening of alveoli by applying a high positive end-expiratory pressure improves oxygenation without influencing mortality. Obesity causes alveolar atelectasis, thus suggesting that a higher positive end-expiratory pressure might be more protective among the obese. We hypothesized that the effect of applying a high positive end-expiratory pressure on mortality from acute respiratory distress syndrome would differ by obesity status. Methods This was a retrospective analysis of 505 patients from the Assessment of Low tidal Volume and elevated End-expiratory volume to Obviate Lung Injury Trial, a multicenter randomized trial that compared a higher vs a lower positive end-expiratory pressure ventilatory strategy in acute respiratory distress syndrome. We examined the relationship between positive end-expiratory pressure strategy and 60-day mortality stratified by obesity status. Results Among obese patients with acute respiratory distress syndrome, those assigned to a high positive end-expiratory pressure strategy experienced lower mortality compared with those assigned to a low strategy (18% vs 32%; P = .04). Among the nonobese, those assigned to high positive end-expiratory pressure strategy experienced similar mortality with those assigned to low strategy (34% vs 23%; P = .13). Multivariate analysis demonstrated an interaction between obesity status and the effect of positive end-expiratory pressure strategy on mortality ( P Conclusions Ventilation with higher levels of positive end-expiratory pressure was associated with improved survival among the subgroup of patients with acute respiratory distress syndrome who are obese.


  • 주제어

    Adult .   ARDS .   Mortality .   Obesity .   PEEP .   Survival.  

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