Topics: Categorizing acute kidney injury, Approach to acute kidney injury, Acute kidney injury requiring dialysis. Categorizing Acute Kidney Injury Acute kidney injury can be categorized into 3 main groups: pre-renal, renal and post-renal. Any problems with the heart, or blood supply reaching the kidneys is considered pre-renal. Any problems inside the kidney itself is considered intra-renal. Any problems occurring with urine being able to leave the kidneys i.e. in the ureters, bladder, urethra is post-renal. Post-renal AKI is kidney damage due to back up of urine produced by the kidneys into the kidney itself. Pre-renal AKI is kidney damage due to a lack of blood flow to the kidneys. Intra-renal…