CBC, urinalysis with sediment microscopy, urine electrolytes, osmolarity, serum electrolytes, blood urea nitrogen and serum creatinine, and urine dipstick are commonly performed in patients to evaluate acute<unk><unk>  and other causes of acute renal failure. Urine sediment may show<unk>  epithelial cells and epithelial cell casts or brown muddy granular casts. Increased urine sodium concentration >40 mEq/L, urine fractional excretion of sodium greater than 2 percent along with elevated serum creatinine concentration at a rate greater than 0.3 mg/dL/day may be found in acute<unk><unk> . However, these tests may have some limitations.
Acute tubular necrosis laboratory findings
Interstitial nephritis laboratory findings
Renal amyloidosis laboratory findings
Acute tubular necrosis physical examination
Acute kidney injury laboratory findings
Nephrotic syndrome laboratory findings
Focal segmental glomerulosclerosis laboratory findings
Kidney stone laboratory findings