Turnaround times
The quoted turnaround time is from sample receipt in the laboratory, to results authorisation in the Laboratory Information Management system. The times do not include transport of specimen to the laboratory or the administrative process to print and post/email reports. Service users must allow for transport and reporting time when ordering tests.
Clinical background:
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.
Specimen container paediatric:
Plain universal container (random urine sample)
Specimen container adult:
Plain universal container (random urine sample), or plain bottle (24 hour urine collection)
Minimum volume paediatric:
1 mL urine
Minimum volume adult:
1 mL urine
Sample stability:
2 days at 15 to 25C7 days at 2 to 8C4 weeks at -20C
Reference ranges:
Adult 24 hour collection: 430 to 710 mmol/24