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Original Articles
Renal function of intensive care unit patients: plasma creatinine and urinary retinol-binding protein
Rev Bras Ter Intensiva. 2008;20(4):385-393
Abstract
Original ArticlesRenal function of intensive care unit patients: plasma creatinine and urinary retinol-binding protein
Rev Bras Ter Intensiva. 2008;20(4):385-393
DOI 10.1590/S0103-507X2008000400011
Views0See moreOBJECTIVES: The early assessment of renal dysfunction using common markers does not provide either a sensitive or specific indication of renal dysfunction in critically ill patients. More specific and sensitive markers are desirable for the early detection of an initial renal pathophysiological process. Urinary retinol-binding protein could be an alternative method to early evaluation of renal function in these patients. METHODS: This study followed-up 100 critical care patients and assessed their clinical and laboratory variables, including plasma creatinine and urinary retinol-binding ratio, and demographic variables. RESULTS: The sample was characterized by geriatric (63.4±15.6 years), male (68%), being 53% surgical patients. Statistical analysis showed association between plasma creatinine and the following variables: gender (p-0.026), age (p-0.038), use of vasoactive drugs (p-0.003), proteinuria (p-0.025), Acute Physiological Chronic Health Evaluation (APACHE) II score (p-0.000), urea (p-0.000), potassium (p-0.003) and estimated creatinine clearance (p-0.000). Urinary retinol-binding protein was correlated with more variables: weight, use of invasive ventilation (p-0.000), use of nonsteroidal antiinflammatory drugs (p-0.018), use of vasoactive drugs (p-0.021), high temperature (>37.5ºC) (p-0.005), proteinuria (p-0.000), bilirubinuria (p-0.004), urinary flow (p-0.019), minimal diastolic pressure (p-0.032), minimal systolic pressure (p-0.029), APACHE II (p-0.000), creatinine (p-0.001), urea (p-0.001), estimated creatinine clearance (p-0.000). Urinary retinol-binding protein also tended to associate with previous renal disease, vasculopathy and neoplasm. Sodium excretion fraction correlated with plasma creatinine and urinary retinol-binding protein in univariate analysis. CONCLUSIONS: Urinary retinol-binding protein might be considered in clinical practice as a better marker regarding diagnostic performance in patients at risk of developing acute kidney injury, when compared with other markers routinely used. Moreover, urinary retinol-binding protein has other features of a good diagnostic test – it is a practical and non-invasive method.
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Case reports Child Coronavirus infections COVID-19 Critical care Critical illness Extracorporeal membrane oxygenation Infant, newborn Intensive care Intensive care units Intensive care units, pediatric mechanical ventilation Mortality Physical therapy modalities Prognosis Respiration, artificial Respiratory insufficiency risk factors SARS-CoV-2 Sepsis