What are the tests for acute kidney failure?

BUN, Creatinine &: Serum elecrolytes.

Blood, urine, US: Blood test for bun, creatinine urine analysis with sediment exam urine for sodium , creatinine, osmolality ulrarsound of kidneys.

Other tests: I agree with the previous doctor, beyond blood tests you can also check the size of your kidney with an ultrasound. There are also specific biomarkers- expensive blood tests- to monitor any damage to the kidney if you have experienced any kidney failure. The main test is the creatinine- a protein measured in the blood If its high it means your kidney may have sustained some damage.