| Selected causes of AKI requiring immediate diagnosis and specific therapies | Recommended diagnostic tests |
| Decreased kidney perfusion | Volume status and urinary diagnostic indices |
| Acute glomerulonephritis, vasculitis, interstitial nephritis, thrombotic microangiopathy | Urine sediment examination, serologic testing and hematologic testing |
| Urinary tract obstruction | Kidney ultrasound |
Source: Table 5 from KDIGO
https://kdigo.org/wp-content/uploads/2016/10/KDIGO-2012-AKI-Guideline-English.pdf