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Validating a lower urine output criteria in predicting death in critically ill patients

Md Ralib, Azrina and Mat Nor, Mohd Basri (2017) Validating a lower urine output criteria in predicting death in critically ill patients. The International Medical Journal of Malaysia, 16 (1). pp. 45-52. ISSN 1823-4631

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Abstract

Introduction: Urine output provides a rapid estimate for kidney function, and its use has been incorporated in the diagnosis of acute kidney injury. However, not many studies had validated its use compared to the plasma creatinine. It has been showed that the ideal urine output threshold for prediction of death or the need for dialysis was 0.3 ml/kg/h. We aim to assess this threshold in our local ICU population. Materials and Methods: This was a secondary analysis of an observational study done in critically ill patients. Hourly urine output data was collected, and a moving average of 6-hourly urine output was calculated over the first 48 hours of ICU admission. AKIuo was defined if urine output ≤ 0.5 ml/kg/h, and UO0.3 was defined as urine output ≤ 0.3 ml/kg/h. Results: 143 patients were recruited into the study, of these, 87 (61%) had AKIuo, and 52 (36%) had UO0.3. The AUC of AKIuo in predicting death was 0.62 (0.51 to 0.72), and UO0.3 was 0.66 (0.55 to 0.77). There was lower survival in patients with AKIuo and UO0.3 compared to those without (p=0.01, and 0.001, respectively). However, only UO0.3 but not AKIuo independently predicted death (HR 2.44 (1.15 to 5.18)). Conclusions: A threshold of 6 hourly urine output of 0.3 ml/kg/h but not 0.5 ml/kg/h independently predictive of death. This support previous finding of a lower threshold of urine output criteria for optimal prediction.

Item Type: Article (Journal)
Additional Information: 3934/57148
Uncontrolled Keywords: Urine output, intensive care unit, acute kidney injury, death, dialysis
Subjects: R Medicine > R Medicine (General)
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Medicine > Department of Anaesthesiology & Intensive Care
Depositing User: Dr Azrina Md Ralib
Date Deposited: 01 Jun 2017 14:50
Last Modified: 10 Oct 2017 15:32
URI: http://irep.iium.edu.my/id/eprint/57148

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