University of Iowa
Diagnostic Laboratories
(UIDL) Test Directory

319-384-7212 (local)
1-866-844-2522 (toll free)


Cancer Antigen 125, (Ca 125)
Order Code: CA125
Order Form: Laboratory Requisition
Specimen:
Plasma
Collection Medium:
Plasma separator tube
Alternate
Collection Media:
Call laboratory for additional acceptable specimen collection 
containers.
Minimum:
2 ml whole blood in plasma separator tube or
one full 0.6 microtube
Testing
Schedule:
24 hrs/day, 7 days a week, including holidays.
Analytic Time:
1 hour (upon receipt in laboratory)
Reference Range:
0-34 U/ml
Comments:
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.
Methodology:
Chemiluminescent
Sample
Processing:
Centrifuge at 3000 RPM for 10 minutes.
Aliquot plasma into labeled container and cap.
Sample
Storage:
Refrigerate.
Transport
Instructions:
Place specimen into zip-lock type bag, seal bag.
Place requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
CPT Code:
86304

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Updated: 11/01/2005