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HelpTest Code CO2 Bicarbonate
Specimen Requirements
Submit only one of the followings
Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
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Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5mL
Minimum Volume: 0.5mL plasma
Collection Instructions: Centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | 1 day |
| Refrigerate: | 7 days |
| Frozen: | 2 weeks |
Send in primary tube, do not aliquot. A consequent decrease in the CO2 value of up to 6 mEq/L can occur in the course of an hour once the specimen has been exposed to ambient air.
Reference Interval
| Age | (mmo/L) |
|---|---|
| 0 – <1 week | 15 – 28 |
| 1 week – 1 yr | 16 – 29 |
| 2 yrs - 9 yrs | 17 – 30 |
| 10 yrs – 17 yrs | 20 – 32 |
| ≥18 yrs | 22 – 32 |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Pep Carboxylase
Service Code
31114
Update
Last updated 26/02/2022
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Evaluation of acid-base status
Alias
HCO3