Differentials
Prerenal azotemia
SIGNS / SYMPTOMS
INVESTIGATIONS
SIGNS / SYMPTOMS
Oliguria is much more frequent.
INVESTIGATIONS
BUN-to-creatinine ratio is >20:1.
Ratio of urine to plasma creatinine levels are high and the urinary sodium concentration is low; fractional excretion of sodium is low.
Fractional excretion of sodium (FENa) <1%.
Fractional excretion of urea (FEUrea) <35%.
Intrinsic renal azotemia
SIGNS / SYMPTOMS
INVESTIGATIONS
SIGNS / SYMPTOMS
Patients with glomerular disease typically present with proteinuria and microscopic dysmorphic hematuria.
INVESTIGATIONS
Urinalysis shows proteinuria and microscopic hematuria.
Fractional excretion of sodium (FENa) >2%.
Fractional excretion of urea (FEUrea) >35%.
Use of this content is subject to our disclaimer