Cw Antigen Typing, Patient
Also known as: CW AG
Use
The test determines if the Cw (RH8) antigen is expressed on the patient's red blood cells. This information is useful for understanding blood type, managing transfusions, and potentially assessing the risk of hemolytic disease in newborns where Cw antigen incompatibility may be present between mother and child. It helps in identifying any alloantibodies that might form due to incompatible blood transfusions and can be used in clinical settings to guide decisions related to blood matching.
Special Instructions
This test requires careful handling of specimens to ensure the accuracy of results. Blood samples should not be frozen and must be transported refrigerated to maintain integrity. This antigen typing is particularly relevant in transfusion settings and for patients with a known history of hematologic conditions or uncertainties regarding blood antigen typing.
Limitations
The test is limited to detecting the presence or absence of the Cw (RH8) antigen in a blood sample. It does not provide information on other antigens present in the Rh blood group system or other blood group systems. False negatives may occur if the antigen levels are below the detection threshold. The results should be interpreted with caution and in the context of comprehensive serologic testing and clinical findings. Cross-reactivity with other antigens is not characterized and may interfere if present in significant quantities.
FDA ApprovedNew York Approved
Methodology
Immunoassay (Hemagglutination)
Biomarkers
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
7 mL
Minimum Volume
0.5 mL
Container
Lavender (K2EDTA) or Pink (K2EDTA) tube
Storage Instructions
Refrigerated. Do not freeze.
Causes for Rejection
Separator tubes.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 1 week |
| Frozen | Unacceptable |