Cancer Antigen 125, (Ca 125)
Label Mnemonic: | CA125 |
Epic code: | LAB155 |
Order form: | Laboratory Requisition |
Supply order: | Supply Order Form |
Billing: | Billing Policies |
CPT code: | 86304 |
Specimen(s):
Plasma
Collection Medium:
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Plasma Separator Tube 4.5 mL |
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection
containers.
Minimum:
3 mL whole blood in plasma separator tube or TWO Microtainer®
devices
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
0-34 U/mL
Comments:
This assay may be significantly impacted by high-dose biotin (>5
mg dose) taken within previous 12 hours. High concentrations of
biotin may lead to falsely decreased results. These concentrations
may be found in patients taking over-the-counter supplements with
biotin content much higher than nutritional requirements for biotin.
Specimens should not be collected until at least 12 hours after the
last dose.
Please print, complete and submit the Advance Beneficiary Notice (ABN) along with the Laboratory Requisition before shipping the specimen.
Please print, complete and submit the Advance Beneficiary Notice (ABN) along with the Laboratory Requisition before shipping the specimen.
Test Limitations:
As with all tests containing monoclonal antibodies, erroneous
findings may be obtained from samples taken from patients who have
been treated with monoclonal mouse antibodies (e.g., OC 125) or who
have received them for diagnostic purposes. In rare cases,
interference due to extremely high titers of antibodies to ruthenium
can occur. Elecsys CA125 II contains additives which minimize these
effects. Extremely high titers of antibodies to streptavidin can
occur in isolated cases and cause interference. For diagnostic
purposes, the Elecsys CA125 II finding should always be assessed in
conjunction with the patient's medical history, clinical examination
and other findings.
Hemolysis: No significant interference up to an H index of 3200 (approximate hemoglobin concentration: 3200 mg/dL).
Lipemia: No significant interference up to an L index of 2000 (approximate triglycerides concentration: 4000 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.
Icterus: No significant interference up to an I index of 66 (approximate conjugated and unconjugated bilirubin concentration: 66 mg/dL).
Hemolysis: No significant interference up to an H index of 3200 (approximate hemoglobin concentration: 3200 mg/dL).
Lipemia: No significant interference up to an L index of 2000 (approximate triglycerides concentration: 4000 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.
Icterus: No significant interference up to an I index of 66 (approximate conjugated and unconjugated bilirubin concentration: 66 mg/dL).
Methodology:
Electrochemiluminescence Immunoassay
Sample Processing:
Centrifuge at a speed and time necessary to get barrier separation
of plasma/serum and cells within 1 hour of collection. Send specimen
in original tube. Do Not transfer to another tube.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Sample Storage:
Refrigerate.
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
Transport Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal
bag.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
See Additional Information:
Biotin Interference with Immunoassays
Biotin Interference with Immunoassays