Murat Saritemur1, Mehmet Turkeli2, Kamuran Kalkan3, İbrahim Halil Tanboga3, Enbiya Aksakal3. 1. Department of Emergency Medicine, Atatürk University Medical Faculty, Erzurum, Turkey. Electronic address: muratsaritemur@gmail.com. 2. Department of Internal Medicine, Atatürk University Medical Faculty, Erzurum, Turkey. 3. Department of Cardiology, Atatürk University Medical Faculty, Erzurum, Turkey.
Abstract
OBJECTIVES: To investigate the predictive role of serum uric acid (SUA) levels measured in the emergency department (ED) to monitor contrast-induced nephropathy (CIN) and correlation with severity of nephropathy in patients undergoing primary percutaneous coronary intervention (PCI). METHOD: The patients who were admitted to our ED and underwent primary PCI were enrolled retrospectively. Their baseline characteristics including SUA and creatinine levels in the ED and their creatinine levels 48 hours after PCI were noted. Nephropathy was graded as follows: grade 0, ΔCr ≤25% and ≤0.5 mg/dL; grade 1, ΔCr >25% but ≤0.5 mg/dL; and grade 2, ΔCr >0.5 mg/dL. A multiple logistic regression analysis was used to define the independent predictors of CIN. RESULTS: Of a total of 744 patients, CIN was observed in 12.5% (n = 93). Serum uric acid levels were significantly higher in the CIN (+) group compared with the CIN (-) group (6.09 ± 2.01 mg/dL vs 4.89 ± 1.32 mg/dL, respectively; P < .001). Patients with grade 0 CIN had significantly lower SUA levels than did those with grades 1 and 2 (4.89 ± 1.32 mg/dL vs 5.88 ± 1.99 and 6.41 ± 2.02 mg/dL, respectively; P < .001), but there was no significant difference between grade 1 and grade 2 CIN cases in terms of SUA levels (5.88 ± 1.99 mg/dL vs 6.41 ± 2.02 mg/dL, P = .10). The cutoff value for SUA was 5.05 mg/dL for the prediction of CIN (area under the curve, 0.685; P < .001; sensitivity, 66%; specificity, 60%) in the population. CONCLUSIONS: The SUA level is a simple independent early predictor of CIN in patients who underwent primary PCI, and early detection may help prevent the progression of CIN.
OBJECTIVES: To investigate the predictive role of serum uric acid (SUA) levels measured in the emergency department (ED) to monitor contrast-induced nephropathy (CIN) and correlation with severity of nephropathy in patients undergoing primary percutaneous coronary intervention (PCI). METHOD: The patients who were admitted to our ED and underwent primary PCI were enrolled retrospectively. Their baseline characteristics including SUA and creatinine levels in the ED and their creatinine levels 48 hours after PCI were noted. Nephropathy was graded as follows: grade 0, ΔCr ≤25% and ≤0.5 mg/dL; grade 1, ΔCr >25% but ≤0.5 mg/dL; and grade 2, ΔCr >0.5 mg/dL. A multiple logistic regression analysis was used to define the independent predictors of CIN. RESULTS: Of a total of 744 patients, CIN was observed in 12.5% (n = 93). Serum uric acid levels were significantly higher in the CIN (+) group compared with the CIN (-) group (6.09 ± 2.01 mg/dL vs 4.89 ± 1.32 mg/dL, respectively; P < .001). Patients with grade 0 CIN had significantly lower SUA levels than did those with grades 1 and 2 (4.89 ± 1.32 mg/dL vs 5.88 ± 1.99 and 6.41 ± 2.02 mg/dL, respectively; P < .001), but there was no significant difference between grade 1 and grade 2 CIN cases in terms of SUA levels (5.88 ± 1.99 mg/dL vs 6.41 ± 2.02 mg/dL, P = .10). The cutoff value for SUA was 5.05 mg/dL for the prediction of CIN (area under the curve, 0.685; P < .001; sensitivity, 66%; specificity, 60%) in the population. CONCLUSIONS: The SUA level is a simple independent early predictor of CIN in patients who underwent primary PCI, and early detection may help prevent the progression of CIN.