Cw Antigen Typing, Patient

Casandra

Casandra Test Code AR20953Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 2013504CPT Code 86905

Cw Antigen Typing, Patient

Also known as: CW AG

Clinical Use

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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.

Test Details

FDA Approved