Creatinine, urine
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 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).
Test Details
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Discipline:
Biochemistry
Biochemistry
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Specimen Container Adult:
Plain universal container (random urine sample) and plain bottle (24 hour urine collection)
Plain universal container (random urine sample) and plain bottle (24 hour urine collection)
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Specimen Container Paediatric:
Plain universal container (random urine sample)
Plain universal container (random urine sample)
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Minimum Volume Adult:
1 mL urine
1 mL urine
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Minimum Volume Paediatric:
1 mL urine
1 mL urine
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Sample Stability:
2 days at 15-25°C, 6 days at 2-8°C, 6 months at -20°C
2 days at 15-25°C, 6 days at 2-8°C, 6 months at -20°C
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Interpretation:
Urine creatinine results are rarely interpreted in isolation, but are used to assist interpretation of other urinary analytes.
Urine creatinine results are rarely interpreted in isolation, but are used to assist interpretation of other urinary analytes.
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Reference Ranges:
Adult 24 hour collection reference range:
Female: 6-13mmol/24hour
Male: 9-19mmol/24hourAdult 24 hour collection reference range:
Female: 6-13mmol/24hour
Male: 9-19mmol/24hour -
Other Info:
Acid rinsed bottle acceptable
Acid rinsed bottle acceptable
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Routine Contact Name:
Duty Biochemist
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Routine Telephone:
Freeman: 0191 244 8889
RVI: 0191 282 9719
Freeman: 0191 244 8889
RVI: 0191 282 9719
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Routine Email: