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HelpTest Code 24CCT Creatinine Clearance Test, 24 hr
Laboratory Code
LAB818
Specimen Requirements
Specimen Type 1: Serum/Plasma
Container/Tube: Gold Top (SSTII) / Green Top (Li Heparin)
Volume: 5.0 mL / 4.5 mL
Minimum Volume: 0.5 mL
Specimen Type 2: 24 hr urine
Container/Tube: The following types of 24 hr urine containers are acceptable:
- No preservatives
- 3.0 g Thymol
Volume: 4000.0 mL
Minimum Volume: 20.0 mL
Collection Instructions: Send urine and serum/plasma samples together to laboratory.
Please refer to NUH's Urine Preservative Guide
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 7 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
| Specimen Type | 24 hr urine |
|---|---|
| Ambient | 2 days |
| Refrigerate | 6 days |
| Frozen | 6 months |
Panel Information
Panel includes the following tests:
- Creatinine
- Creatinine, urine
- Urine Volume, total
- Time
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others | Not applicable |
Reference Interval
Creatinine, urine, 24 hrs
| 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)
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of renal disease.
Estimation of glomerular filtration rate.
Service Code
31150
LOINC Code Information
| Urine volume, total | 3167-4 |
|---|---|
| Creatinine, urine | 14683-7 |
| Creatinine, urine, 24 hr | 14684-5 |
| Creatinine clearance | 2164-2 |
Update
Last updated 11/03/2025