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Critical Care  2013 

Renal replacement therapy: is it effective in critically ill patients with acute kidney injury?

DOI: 10.1186/cc11928

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The most critical disadvantage of propensity score matching is that this technique can only account for observed covariates, not unobserved covariates, which may cause bias. Furthermore, there are numerous limitations to the analysis: inclusion of patients with chronic kidney disease stages I and II (defined by the estimated glomerular filtration rate), misclassification of AKI (only creatinine criteria), cause of AKI not given, late initiation of RRT, no measurements of the dose, and substantial advances in intensive care during the study period (1997 to 2009).Critically ill patients with AKI face excessive death rates even in the early stages of AKI that cannot be reversed by RRT. AKI induces and multiplies distant organ dysfunction by induction of inflammatory cascades and oxidative stress. No prospective randomized trial has to date tested the hypothesis of whether earlier initiation of RRT reduces mortality for ICU AKI patients.During the Korean War, systematic dialysis in AKI reduced mortality from 90% to approximately 50%. Although circumstantial, this reduction remains the best available evidence that dialysis improves outcomes for critically ill patients with AKI [2]. There is no doubt that provision of adequately initiated and adequate-dose RRT is life-sustaining in ICU patients [3].AKI: acute kidney injury; RRT: renal replacement therapy.The authors declare that they have no competing interests.


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