Home
HelpTest Code CRE Creatinine, serum
Laboratory Code
LAB66
Specimen Requirements
Submit only one of the following:
Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5 mL
Minimum Volume: 0.5 mL plasma
Collection Instructions: Centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum/Plasma |
|---|---|
| Ambient | 7 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | Alert/Reject |
| Others | Not applicable |
Reference Interval
| Age | Male | Female |
|---|---|---|
| 0 – < 1 wk | 25 – 93 umol/L | |
| 1 – 3 wks | 17 – 50 umol/L | |
| 4 wks – 1 yr | 11 – 36 umol/L | |
| 2 – 5 yrs | 20 – 44 umol/L | |
| 6 – 11 yrs | 27 – 58 umol/L | |
| 12 – 14 yrs | 35 – 83 umol/L | 35 – 74 umol/L |
| 15 – 18 yrs | 50 – 100 umol/L | 38 – 82 umol/L |
| ≥ 19 yrs | 60 – 110 umol/L | 45 – 90 umol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Assessment of renal function.
Service Code
31115
LOINC Code Information
14682-9
Update
Last updated 11/03/2025