Early Prediction and Diagnosis of Acute Kidney Injury

-Renal Resistive Index Measurement Method: Ultrasonographic examination and doppler ultrasonography will be performed using a convex transducer. First, the kidney is localised in the flanks with conventional B-mode ultrasonography, after which, color doppler images are acquired. The interlobar arteries were visualised, with the wavelength obtained by creating a 90-degree right-angle with the interlobar artery using a power doppler. After the manual determination of the peak systolic and end-diastolic velocities \* RRI will be calculated by the device using the formula: RRI = (peak systolic velocity - end-diastolic velocity) / (peak systolic velocity). RRI will be measured three times for each kidney and averaged