Severe Acute Renal Failure: A Comparison of Acute Continuous Hemodiafiltration and Conventional Dialytic Therapy

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Abstract
It is unknown whether continuous renal replacement techniques result in diminished morbidity and mortality when compared to conventional dialytic techniques. To investigate this issue a previously described, retrospectively studied group of critically ill patients with severe acute renal failure treated by conventional dialysis (CD) was compared to a prospectively studied group of similar patients treated by acute continuous hemodiafiltration (ACHD). A combined retrospective and prospective clinical and laboratory investigation was carried out for 234 consecutive critically ill patients with severe acute renal failure in the intensive care unit of a tertiary institution. Biochemical, clinical and outcome data in all patients treated by conventional dialytic techniques (intermittent hemodialysis and/or peritoneal dialysis) during a 5-year period were retrospectively analyzed, and a prospective analysis of the same biochemical, clinical and outcome data in all patients treated by acute continous hemodiafiltration was done over a similar time span, with statistical comparison of findings. One hundred and fifty patients were treated by ACHD and 84 by CD. ACHD patients were more severely ill (mean APACHE II score: 28.2 vs. 25.8; p

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