Testing Laboratory
Auckland Te Toka Tumai | Auckland HospitalDepartment
Chemical Pathology
Delphic Registration Code (Alpha Code)
CRCL
Test Code (Numeric Code)
0225
Laboratory Handling
Phlebotomy
24 h urine collection for creatinine, plus a blood for creatinine (5 mL blood, SST or PST tube) taken within 24h of the start or finish of the urine collection period. Accurate timing of the 24h collection is essential.
Sample Stability
See entries for serum and urine creatinine
Associated Tests
Turnaround Time
3 hours
Specimen Type
- 24hr Urine
- Plasma
- Serum
Specimen Requirements
Tube/Container Type:
Preferred
- 24hr Urine Container
- SST II (Gold Cap)
Acceptable
- Lithium Heparin PST- Gel (Light Green Cap)
Paediatric Specimen Requirements
Tube/Container Type:
Preferred
- 24hr Urine Container
- SST(Microtainer)
Acceptable
- 24hr Urine Container
- Heparin (Microtainer)
Additional Specimen Information
SPECIMEN:
24 h urine collection for creatinine, plus a blood for creatinine (5 mL blood, SST or PST tube) taken within 24h of the start or finish of the urine collection period.
Accurate timing of the 24h collection is essential.
How to collect an accurate 24h urine:
1. Decide on the START TIME of the collection. It is usually most convenient to start in the morning.
2. At the START TIME the patient empties her / his bladder into the toilet (NOT into the bottle). Note the START TIME and date on the bottle(s).
3. All urine passed after this is collected into the bottle(s). If possible refrigerate the collected urine to prevent bacterial growth.
4. At the END TIME (exactly 24h after the START TIME) the patient empties his / her bladder, into the bottle.
5. Deliver the bottle(s) promptly to the laboratory.
Last updated: 25/08/2026