The online version of this article (doi:10.1186/cc9308) contains supplementary material, which is available to authorized users.
CJW has received speaker fees and travel reimbursements from manufacturers of plasma-derived therapies (CSL Behring, King of Prussia, PA, USA, and Kedrion, Prato, Italy). The other authors declare that they have no competing interests.
CJW conceived the meta-analysis and participated in its design and coordination, extracted data, performed statistical analysis, contributed to the interpretation of results, and helped to draft the manuscript. MJ participated in the design and coordination of the meta-analysis, contributed to the interpretation of results, and helped to draft the manuscript. All authors participated in searching for trials and determining their eligibility for inclusion in the meta-analysis. All authors read and approved the final manuscript.
It has been hypothesized that hyperoncotic colloids might contribute to acute kidney injury (AKI). However, the validity of this hypothesis remains unclear.
A meta-analysis was conducted of randomized controlled trials evaluating AKI after infusion of hyperoncotic albumin and hydroxyethyl starch (HES) solutions. Mortality was a secondary endpoint. Eligible trials were sought by multiple methods, and the pooled odds ratios (OR) for AKI and death and 95% confidence intervals (CI) were computed under a random effects model.
Eleven randomized trials with a total of 1220 patients were included: 7 evaluating hyperoncotic albumin and 4 hyperoncotic HES. Clinical indications were ascites, surgery, sepsis and spontaneous bacterial peritonitis. Hyperoncotic albumin decreased the odds of AKI by 76% (OR, 0.24; CI, 0.12-0.48; P < 0.0001), while hyperoncotic HES increased those odds by 92% (OR, 1.92; CI, 1.31-2.81; P = 0.0008). Parallel effects on mortality were observed, with hyperoncotic albumin reducing the odds of death by 48% (OR, 0.52; CI, 0.28-0.95; P = 0.035) and hyperoncotic HES raising those odds by 41% (OR, 1.41; CI, 1.01-1.96; P = 0.043).
This meta-analysis does not support the hypothesis that hyperoncotic colloid solutions per se injure the kidney. Renal effects appear instead to be colloid-specific, with albumin displaying renoprotection and HES showing nephrotoxicity.
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- Hyperoncotic colloids and acute kidney injury: a meta-analysis of randomized trials
Christian J Wiedermann
Luigi U Gaioni
- BioMed Central
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