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Creatinine- Enzymatic

Alias: N/A

Discipline: Clinical Chemistry

Test information: Serum creatinine is used as a test of renal function. Unlike urea it is not influenced by non-renal factors such as protein turnover . It is used to monitor progression and treatment in acute kidney injury and chronic kidney disease (CKD). In acute injury measurement frequency would be guided by clinical factors and the need to monitor potassium levels. In patients with CKD frequency depends upon which disease stage the patient is at, frequency increasing as the CKD worsens. Creatinine should be measured in patients suspected of having, or at risk of, impaired renal function because of shock, dehydration, exposure to nephrotoxics or clinical evidence of intrinsic renal disease.

Specimen Type(s)
  • Blood;
Other Acceptable Specimen Type(s)
Specimen Container - Adult
  • Gold Top SST BD;
Specimen Container - Paediatric
  • Light Green Top Microtainer BD;
  • N/A;
Part of a test profile?
Volume (min) of sample to be sent to laboratory
Patient Preparation, Sample Handling and Transport
Maximum add on time
5 days
Units and Reference Ranges / Interpretation
RR for Males and Females
less than 15days - 29 - 82 - umol/L
15dys to less than 2 yrs - 9 to 32 - umol/L
2yr to less than 5yrs - 18 - 38 - umol/L
5yrs to less than 12yrs - 27 - 54 - umol/L
12yrs to less than 15yrs - 40 - 72 - umol/L
RR for Female - 15yrs to less than 19yrs - 43 - 74 - umol/L
RR for Male - 15yrs to less than 19yrs - 55 - 96 - umol/L
RR for Female Adult - 49 - 90 - umol/L
RR for Male - Adult - 64 - 104 - umol/L
UKAS number
UKAS accredited test?

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Last updated: 09-05-2024