Specimen Collection
SPECIMEN:
24 h urine or spot urine sample. No preservative required.
Sample stability:
-
2 days at 15-25
o
C
-
6 days at 2-8
o
C
-
3 months at -20
o
C
Reference Intervals
Endogenous creatinine production is proportional to muscle mass.
Units: mmol/24h
|
AGE / SEX |
creatinine output
mmol/24h |
|
0 - 6 months |
0.2 - 1.6 |
|
6 month - 2 years |
0.2 - 2.0 |
|
2 - 6 years |
0.5 - 6.0 |
|
6 - 10 years |
1.5 - 12.6 |
|
10 - 15 years |
2.0 - 20.0 |
|
Adult Female |
4.0 - 17.0 |
|
Adult Male |
7.0 - 24.0 |
Conversion factors: mg/100 mL x 0.0884 = mmol/L
mmol/L x 11.3122 = mg/100 mL
Uncertainty of Measurement: 6%
Turnaround Time: Within 3 hours
Diagnostic Use and Interpretation
1. As part of a Creatinine Clearance test.
2. To assess the completeness of a timed urine collection. For this purpose, the following approximate creatinine excretion rates, related to body weight, may be used:
|
adult male: |
0.20 mmol/kg body weight/24h |
|
adult female: |
0.15 mmol/kg body weight/24h |
|
child: |
0.10 mmol/kg body weight/24h |
Contact Information
The chemical pathology team
can be reached via email:
chemicalpathologist@adhb.govt.nz
or via Lablink (09) 307 4949 ext 22000 or 09-3078995
Emails will receive priority attention from the on-call chemical pathologist. Include the patients NHI.
After-hours: contact
Lablink (Auckland City Hospital ext. 22000 or 09-3078995) or hospital operator for on duty staff after hours
.