Objective: To determine xanthine oxidase and superoxide dismutase activities, lipid peroxidation, protein carbonylation, and total radical-trapping antioxidant parameter in survivors and nonsurvivors patients with severe burn injury.
Design And Setting: Prospective, comparative observational study in an intensive care unit, burn division, in a trauma hospital.
Patients: Twenty-five consecutive patients who met the established criteria for severe burn injury (total burn surface area of more than 30%).
Measurements And Results: Plasma thiobarbituric acid reactive species and protein carbonyls levels were significantly higher in nonsurvivors than in survivors at 0 and 6 h. Elevated xanthine oxidase activity at 0 h was associated with adverse outcome after burn injury. In contrast, plasma superoxide dismutase activity and total radical-trapping antioxidant parameter did not differ significantly between nonsurvivors and survivors at any time point.
Conclusions: For the first time we demonstrate the value of oxidative parameters, namely thiobarbituric acid reactive species, protein carbonyls, and xanthine oxidase activity, in identifying burn patients with a poor prognosis. Whether these parameters are merely markers of clinical course, or whether they signal specific deleterious effects of oxidative stress during the burn injury remains to be elucidated.
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