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  • Critical care medicine · May 1994

    Cytokine, complement, and endotoxin profiles associated with the development of the adult respiratory distress syndrome after severe injury.

    • T J Donnelly, P Meade, M Jagels, H G Cryer, M M Law, T E Hugli, W C Shoemaker, and E Abraham.
    • Department of Medicine, UCLA Medical Center.
    • Crit. Care Med. 1994 May 1;22(5):768-76.

    ObjectiveThe adult respiratory distress syndrome (ARDS) is a frequent complication after severe accidental trauma. This study examines the hypothesis that increased systemic concentrations of proinflammatory cytokines, endotoxin, or complement fragments may predict the development of ARDS.DesignProspective, observational study.SettingTwo Level I university trauma centers.PatientsFifteen severely injured patients (Injury Severity Score of > or = 25).InterventionsStandard emergency department, operating room, and intensive care unit management.Measurements And Main ResultsPlasma samples were obtained at 4-hr intervals from the time of injury and were assayed for concentrations of endotoxin, tumor necrosis factor-alpha, interleukin (IL)-1 beta, IL-6, IL-8, and complement fragments C3a and C4a. Hemodynamic and oxygen metabolism variables also were measured at 4-hr intervals after injury. Seven patients developed ARDS and eight patients did not. The PaO2/FIO2 ratio was significantly decreased in the patients with ARDS compared with non-ARDS patients as early as 4 hrs postinjury, and remained significantly decreased throughout the initial 24 hrs after severe accidental injury. Plasma IL-8, IL-6, C3a, and C4a concentrations were markedly increased starting in the immediate postinjury period in both ARDS and non-ARDS patients, but no significant differences were found between the two groups until 16 hrs after injury when plasma IL-8, C3a, and C4a concentrations became significantly higher in the ARDS group. Neither the ARDS nor non-ARDS patients showed the presence of circulating IL-1 beta, TNF-alpha, or endotoxin at any postinjury time point.ConclusionsThese results demonstrate that measurements of plasma concentrations of proinflammatory cytokines, endotoxin, or complement fragments are not helpful in predicting the development of ARDS after severe accidental injury.

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