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HelpTest Code 24CCT Creatinine Clearance Test, 24Hr
Specimen Requirements
Specimen Type 1: Serum / Plasma
Container/Tube: Gold Top (SSTII) / Green Top (Li Heparin)
Volume: 5.0mL / 4.5mL
Minimum Volume: 0.5mL
Specimen Type 2: 24 hours Urine
Container/Tube: The following types of 24hr urine containers are acceptable:
- No preservatives,
- 3g Thymol
Volume: 4000mL
Minimum Volume: 20mL
Collection Instructions: Send urine and serum/plasma samples together to the lab.
Please refer to NUH's Urine Preservative Guide
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type | Serum |
|---|---|
| Ambient | 7 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
| Specimen Type: | 24 hour Urine |
|---|---|
| Ambient: | 1 day |
| Refrigerate: | 4 days |
| Frozen: | 3 weeks |
Reference Interval
Creatinine, Urine, 24 hours
| Male | 7.7-21.3 mmol/day |
|---|---|
| Female | 5.9-14.1 mmol/day |
Creatinine Clearance (CCT):
Normal > 70 mL/min in a young adult. Typically falling approximately 0.5 mL/min per year at ages over 30 years.
Reference: RCPA Manual
(https://www.rcpa.edu.au/Manuals/RCPA-Manual/Pathology-Tests/C/Creatinine-clearance)
Days and Times Performed
24 hours, TAT 1 day
Methodology
See individual test listings for Methodology
Creatinine, Urine, 24 hours (24CRE)
Service Code
31150
Update
Last updated 10/06/2024
Updated on Specimen requirements container/tube instructions.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of renal disease. Estimation of glomerular filtration rate.
Panel Information
Profile includes the following tests:
- Urine Volume, Total (TUV)
- TIME
- Creatinine (CRE)
- Creatinine, U (CREU)
- Creatinine Clearance (CCT)