**5. Conclusion**

Since AKI increases mortality rate and significantly worsens patients' outcome, it is important to determine the patient with risk for AKI in ICU. The consensus has been achieved for the definition of AKI. This definition focuses on the association of hospital mortality, instead of renal failure requiring dialysis or clinical syndrome defined by pathology. Every patient who is admitted to the ICU should be evaluated and categorized based on the creatinine level. Furthermore, close follow-up of renal function is crucial. Recently introduced biomarkers can be used for early diagnosis of AKI even before SCr level starts to increase. During treatment of these patients intensivist should be alert against fluid overload which is described as an independent risk factor to develop AKI.
