Decreased urine output
0.5mg/dl absolute or >25% relative increase in serum creatinine 48-72hrs after<unk>  exposure
Contrast-induced nephropathy
Poor renal perfusion
IgA nephropathy
Nephrotoxic medications
Emphysematous pyelonephritis
Contrast induced allergic reaction
Post-streptococcal glomerular nephritis
Ureteral stent complications