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  • Title: Update on the comparative safety of colloids: a systematic review of clinical studies.
    Author: Groeneveld AB, Navickis RJ, Wilkes MM.
    Journal: Ann Surg; 2011 Mar; 253(3):470-83. PubMed ID: 21217516.
    Abstract:
    OBJECTIVE: To provide an updated systematic review on the comparative safety of colloids based on recent clinical studies. BACKGROUND: Recent investigations, including large-scale randomized trials and meta-analyses, have sought to determine the effects of colloids on mortality and morbidity. Hypothesized differences in safety profile between hydroxyethyl starch (HES) solutions have also been evaluated in randomized trials. METHODS: Clinical studies reported since 2002 with safety data for acutely ill patients receiving HES, gelatin, dextran, or albumin were sought by computer searches and other methods. Safety endpoints included mortality, morbidity, bleeding and impaired coagulation, and acute kidney injury (AKI). Data extracted from the included study reports were qualitatively summarized. RESULTS: Sixty-nine clinical studies were included. Of those, 42 were randomized controlled trials (RCTs) with 10,382 total patients. New safety data, since 2002, predominantly concerned albumin or HES. A large RCT of intensive care unit patients showed that albumin does not adversely affect survival. Acute kidney injury and a dose-dependent increase in mortality were observed in a large RCT of patients with severe sepsis or septic shock receiving HES. Impaired coagulation and clinical bleeding were frequently reported after HES infusion, especially in cardiac surgery. In head-to-head randomized comparisons of different HES solutions, observed effects on coagulation and renal function were similar. Gelatin showed less impairment of coagulation than HES. Very few safety data related to dextran were identified. CONCLUSIONS: Albumin displayed a more favorable safety profile than HES. Available evidence does not support the existence of consistent safety differences between HES solutions.
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