sensitivitas dan spesifisitas cystatin c dan kreatinin serum dalam mendiagnosis cedera ginjal akut pada pasien sepsis yang dirawat di ruang rawat intensif rsup h. adam malik medan

Serum creatinine has many limitations when being used to diagnose acute kidney injury (AKI), especially in the scope of intensive care unit due to its low sensitivity to depict the kidney dysfunctional level of critically-ill patients. Out of numerous new available biological markers, four biological markers are widely used all over the world to detect AKI, e.g. neutrophil gelatinase-associated lipocalin (NGAL), cystatin C, KIM-1, and interleukin-18. The purpose of this study was to determine the sensitivity and specificity of serum cystatin C and creatinine in establishing the diagnosis of acute kidney injury in sepsis patients treated in intensive care room. This study was a diagnostic test to 24 patients and conducted in intensive care room of H. Adam Malik Hospital during the period of February–March 2014. Population in this study is all adult patients with sepsis, severe sepsis, and septic shock in the intensive care room. A statistical test was conducted using receiving operator characteristics (ROC) method using SPSS 17 software. The result of this study showed that serum cystatin C was more superior than serum creatinine in detecting acute kidney injury in sepsis patients treated in intensive care room. In this study, cystatin C had higher sensitivity, positive prediction score, negative prediction score, and area under curve-receiving operator characteristics (AUC-ROC) than serum creatinine. As of specificity, there was no significant difference between these two biological markers. In conclusion, cystatin C can be an alternative biological marker to detect AKI in sepsis patients treated in intensive care room with a better diagnostic value.