Abstract
The early detection of acute kidney injury (AKI) in patients with chronic kidney disease (CKD) is an unmet clinical need. Proenkephalin (PENK) might improve the early detection of AKI. One hundred and eleven hospitalized CKD patients undergoing radiographic contrast procedures were enrolled. PENK was measured in a blinded fashion at baseline (before contrast media administration) and on day 1 (after contrast media administration). The potential of PENK levels to predict contrast-induced AKI was the primary endpoint. Baseline creatinine and baseline PENK were similar in AKI and no-AKI patients. In AKI patients, day 1 PENK (198 pmol/L vs 121 pmol/L, P < 0.01) was significantly higher compared to no-AKI patients. The area under the curve (AUC) for the prediction of AKI by day 1 PENK was 0.79, 95% CI: 0.70-0.87, similar to serum creatinine: 0.78, 95% CI: 0.61-0.95. Delta PENK was significantly higher in AKI compared to no-AKI patients (53 pmol/L vs 1 pmol/L, P < 0.01). The AUC for the prediction of AKI by delta PENK was high (0.92, 95%CI 0.82-1.00) and remained high for creatinine-blind AKI (0.94, 95% CI: 0.87-0.97). Delta PENK levels improve the early detection of contrast-induced AKI in CKD patients over serial creatinine samplin...Continue Reading
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