- Container
- Urine transport tube, serum in red top or serum separator tube
- Specimen
- 0.5 mL urine and 0.5 mL serum
- Description
- Urinary Clearance Creatinine Ratios (Phosphorous, Calcium, Sodium, Potassium, Chloride)
Determination of urine fractional excretion is indicated to assess renal clearance of specific substances.
Interferences: marked hemolysis or lipemia in serum.