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  • Title: N-acetylcysteine for prevention of acute renal failure in patients with chronic renal insufficiency undergoing cardiac surgery: a prospective, randomized, clinical trial.
    Author: Sisillo E, Ceriani R, Bortone F, Juliano G, Salvi L, Veglia F, Fiorentini C, Marenzi G.
    Journal: Crit Care Med; 2008 Jan; 36(1):81-6. PubMed ID: 18090169.
    Abstract:
    OBJECTIVE: To assess the preventive effect of the antioxidant N-acetylcysteine on postoperative acute renal failure in patients with renal insufficiency undergoing cardiac surgery. DESIGN: Randomized, placebo-controlled, prospective study. SETTING: University cardiology center. PATIENTS: Two hundred fifty-four consecutive patients with chronic renal insufficiency (estimated creatinine clearance < or = 60 mL/min) undergoing elective cardiac surgery. INTERVENTIONS: Patients were randomized to receive N-acetylcysteine (n = 129) or placebo (n = 125). Patients of the N-acetylcysteine group received four boluses of intravenous N-acetylcysteine (1200 mg every 12 hrs, starting immediately before cardiac surgery). MEASUREMENTS AND MAIN RESULTS: The incidence of postoperative acute renal failure (> 25% increase in serum creatinine from baseline) and the in-hospital clinical course were evaluated. Acute renal failure occurred in 46% of patients and was associated with increased in-hospital mortality (7% vs. 0.7%; p = .024). It occurred in 52% of control patients and 40% of N-acetylcysteine-treated patients (p = .06). In-hospital mortality and need for renal replacement therapy were not affected by N-acetylcysteine, but a lower percentage of N-acetylcysteine-treated patients required mechanical ventilation prolonged for > 48 hrs (3% vs. 18%; p < .001) and had an intensive care unit stay > 4 days (13% vs. 33%; p < .001). CONCLUSIONS: Intravenous administration of N-acetylcysteine does not clearly prevent postoperative acute renal failure in patients with renal insufficiency undergoing cardiac surgery.
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