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 creatinine is assessed for 3 main reasons:1. As an assessment of the excretory function of the kidneys as part of a 24hour creatinine clearance test.
2. As an indicator of how concentrated a urine sample is when analysis of other analytes is required (for example urine protein, urine electrolytes, urine amino acids). This also allows these analytes to be reported and interpreted as a creatinine ratio.
3. To assess sample integrity and to assess the reliability of quantitation of other urine analytes (for example urine drug screens).
Specimen container paediatric:
Plain universal container (random urine sample)
Specimen container adult:
Plain universal container (random urine sample) and plain bottle (24 hour urine collection)
Minimum volume paediatric:
1 mL urine
Minimum volume adult:
1 mL urine
Sample stability:
2 days at 15-25°C,
6 days at 2-8°C,
6 months at -20°C
Interpretation:
Urine creatinine results are rarely interpreted in isolation, but are used to assist interpretation of other urinary analytes.
Reference ranges:
Adult 24 hour collection reference range:
Female: 6-13mmol/24hour
Male: 9-19mmol/24hour
Other info:
Acid rinsed bottle acceptable