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Laboratory Medicine

Test catalogue

Prenatal Antibody Screen (BGAS)

Test Name

Prenatal Antibody Screen (BGAS)

Pink Tube Specimen Type / Requirements

Container Type = 2 Pink Tops

Minimum Venous Volume = 2 x 7 ml EDTA specimen (Pink Top)

Tubes must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in 2 Pink top tubes and send to transfusion laboratory. Sample should be well mixed at time of collection to prevent platelet clumping. Requisition must have doctor's name , phlebotomist's signature, collection date and time. Diagnosis, Transfusion History and Pregnancy history if possible. For prenatal patients, patient EDC also required.

Transportation: Send to the blood transfusion lab at room temperature as soon as possible.

Sample Rejection Criteria:Grossly hemolyzed or lipemic specimen is unacceptable; no phlebotomist signature, no collection date and time on requisition is rejected. Unlabeled or Not Sufficient Quantity Samples will be rejected.

Required Documentation

Transfusion Medicine Requisition completed with phlebotomist signature and Date/Time drawn.

Turnaround Time (TAT)

Negative:Same day If discrepant or unexpected results, Positive Antibody Screen: May require 3-5 days

Test Utilization

Repeat every 72hrs as necessary

Reference Value

Antibody Screening: Negative

Test Code



Manual Method

Testing Location

SMH-Transfusion Medicine (Blood Bank)

Other Information