• Nephrol. Dial. Transplant. · Jun 2015

    Review Meta Analysis

    Preoperative renin-angiotensin system inhibitors use linked to reduced acute kidney injury: a systematic review and meta-analysis.

    • Wisit Cheungpasitporn, Charat Thongprayoon, Narat Srivali, Oisin A O'Corragain, Peter J Edmonds, Patompong Ungprasert, Wonngarm Kittanamongkolchai, and Stephen B Erickson.
    • Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA.
    • Nephrol. Dial. Transplant. 2015 Jun 1;30(6):978-88.

    BackgroundPrevious trials of interventions to prevent acute kidney injury (AKI) have been unsuccessful and additional interventions are needed. Existing reviews of preoperative renin-angiotensin system (RAS) inhibitors have suggested harm. We included more recent studies and conducted this meta-analysis to evaluate the risk of postoperative AKI in patients who received preoperative RAS inhibitors.MethodsA literature search was performed using MEDLINE, EMBASE and Cochrane Database of Systematic Reviews from inception through October, 2014. Studies that reported relative risks, odds ratios or hazard ratios comparing the AKI risk in patients who received preoperative RAS inhibitors versus those who did not were included. We performed the prespecified sensitivity analysis including only propensity score-based studies. Mortality risk was evaluated among the studies that reported AKI outcome. Pooled risk ratios (RR) and 95% confidence interval (CI) were calculated using a random-effect, generic inverse variance method.ResultsTwenty-four studies (1 randomized controlled trial and 23 cohort studies) with 102 675 patients were included in the analysis to assess the risk of postoperative AKI and preoperative RAS inhibitors use. The pooled RR of AKI in patients receiving RAS inhibitors was 1.05 (95% CI: 0.92-1.20). The meta-analysis of the RCT and 11 studies with propensity score analysis demonstrated the pooled RR of AKI in patients receiving RAS inhibitors of 0.92 (95% CI: 0.85-0.99). Within the selected studies, preoperative RAS inhibitor therapy was not associated with a significant increase or decrease in mortality (RR: 0.93; 95% CI: 0.80-1.09).ConclusionsOur meta-analysis demonstrates an association between preoperative RAS inhibitor treatment and lower incidence of AKI.© The Author 2015. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved.

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