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  • Title: Citrate vs. heparin for anticoagulation in continuous venovenous hemofiltration: a prospective randomized study.
    Author: Monchi M, Berghmans D, Ledoux D, Canivet JL, Dubois B, Damas P.
    Journal: Intensive Care Med; 2004 Feb; 30(2):260-265. PubMed ID: 14600809.
    Abstract:
    OBJECTIVE: To compare the efficacy and safety of adjusted-dose unfractionated heparin with that of regional citrate anticoagulation in intensive care patients treated by continuous venovenous hemofiltration (CVVH). DESIGN AND SETTING: Prospective, randomized, clinical trial in a 32-bed medical and surgical ICU in a university teaching hospital. PATIENTS: ICU patients with acute renal failure requiring continuous renal replacement therapy, without cirrhosis, severe coagulopathy, or known sensitivity to heparin. INTERVENTIONS: Before the first CVVH run patients were randomized to receive anticoagulation with heparin or trisodium citrate. Patients eligible for another CVVH run received the other study medication in a cross-over fashion until the fourth circuit. MEASUREMENTS AND RESULTS: Forty-nine circuits (hemofilters) were analyzed: 23 with heparin and 26 with citrate. The median lifetime of hemofilters was 70 h (interquartile range 44-140) with citrate anticoagulation and 40 h (17-48) with heparin (p=0.0007). One major bleeding occurred during heparin anticoagulation and one metabolic alkalosis (pH=7.60) was noted with citrate after a protocol violation. Transfusion rates (units of red cells per day of CVVH) were, respectively, 0.2 (0.0-0.4) with citrate and 1.0 (0.0-2.0) with heparin (p=0.0008). CONCLUSIONS: Regional citrate anticoagulation seems superior to heparin for the filter lifetime and transfusion requirements in ICU patients treated by continuous renal replacement therapy.
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