Urea urine

Keywords: Urine urea

Specimen:

Random or 24 h urine collection.

Method:

Spectrophotometry.

Reference Interval:

420-720 mmol/24 h

Application:

Urine urea is only occasionally of value in the assessment of nitrogen balance in patients receiving parenteral nutrition, or in selected patients with non-oliguric acute or chronic renal failure.

Urine urea may also be of value on a random specimen, in the presence of oliguria, to assess renal function.

Interpretation:

Urea excretion is largely dependent on protein intake, tissue breakdown and renal function.

Reference:

Eckfeldt J et al. Clin Chem. 1982; 28: 1500-1502.