Cancer Antigen 125, Blood - Saskatoon
Discipline
Biochemistry
Overview
Alias
- CA125
Specimen Information
Specimen types accepted
- Serum
Specimen collection container
- Preferred collection container: Blood – Gold (gel)
- Alternative collection container: Blood – Red (no gel)
Collection procedure
- Biotin therapy: No sample should be taken until 8 hours after the last biotin administration
Required volume
- Optimal volume: 4.5 mL full collection tube
- Minimum volume: 1.0 mL
(Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
Transport and stability
- 5 days at 2-8°C
Rejection criteria
- Specimens received where the proper collection protocols were not followed
- Pathology and Laboratory Medicine Acceptance and Rejection Criteria
Performance
Methodology
- Electrochemiluminescence immunoassay
Days/times performed
| Availability |
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| Testing site |
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Maximum laboratory time
Results reporting
- In Hospital reported within 2 hours
- Community urgent and intra hospital reported within 4 hours
- Community routine reported within 24 hours
Specimen retention time
- 3 days
Last Updated: February 26, 2026