• Stephen Fröhlich, Amy Donnelly, Orsolya Solymos, and Niamh Conlon.
• National SpR Academic Fellowship Programme, St Vincent's University Hospital, Dublin 4, Ireland. frohlics@yahoo.co.uk
• J Crit Care. 2012 Dec 1;27(6):744.e1-5.

PurposeA simple test that could guide successful cessation of continuous renal replacement therapy (CRRT) in critically ill patients would be clinically useful. This study aimed to investigate whether a 2-hour creatinine clearance (2h-CrCl) measurement could more accurately predict successful cessation of CRRT than serum creatinine or urine output alone.Materials And MethodsThis retrospective study identified all patients admitted to a university teaching hospital intensive care unit who received CRRT and had a 2h-CrCl measurement performed in the 12 hours preceding CRRT cessation. The ability of 2h-CrCl to predict successful discontinuation of CRRT was compared to other renal indices.ResultsOf 85 patients who had 2h-CrCl performed prior to CRRT cessation 53 (62.4%)(success group) remained dialysis free 7 days after CRRT cessation. 2h-CrCl was a better predictor of remaining CRRT free at day 7 (OR, 1.108 [1.05-1.17] per 1 mL/min increase in 2 hours CrCl, P < .001) than urine output, serum creatinine or age. A 2h-CrCl value of 23 mL/min had a sensitivity, specificity and positive predictive value for remaining CRRT free at day 7 of 75.5%, 84.4%, and 88.8%, respectively.Conclusion2h-CrCl may be a useful measurement to help guide discontinuation from CRRT.Copyright © 2012 Elsevier Inc. All rights reserved.

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