Laboratory: Clinical Biochemistry
Test Name:
UREA - (P)
Test Code: U
Clinical Information:
Urea is the major end product of protein and amino acid metabolism. It is synthesized by the urea cycle in the liver from ammonia which is produced by amino acid deamination. It is excreted primarily by the kidneys.
Determination of urea is widely used as a screening test for renal function. When used in conjunction with serum creatinine it can aid in the differential diagnosis of pre-renal, renal and post-renal hyperuremia.
Collection Devices:
Specimen Required:

Plasma: 2.0 mL
Pediatric Plasma: 0.2 mL

Stability 7 days refrigerated, 1 year frozen
Serum: 2.0 mL

Samples must be transferred to an aliquot tube and stored frozen if analysis will not be complete within 48 hours (#110-10-05 Serum / Plasma Separation Procedure & Transport)
Reference Values:
2.8 - 7.1 mmol/L                   (mmol/L x 2.8 = mg/dL)
Stat or Routine
See Also:
More Information: