What type of vacutainer tubes are typically collected in transfusion medicine?

In transfusion medicine, the collection of blood samples is critical for various tests, including blood typing and cross-matching, which are essential to ensure safety during transfusions. The use of pink EDTA tubes is standard because they contain an anticoagulant that prevents clotting, preserving the integrity of the blood cells for testing.

The pink-top tube specifically is designed for blood bank use, as it is used to collect samples for antibody screening and compatibility testing. The full volume collected in two 5mL pink EDTA tubes ensures that there is an adequate sample for the necessary testing, aligning with protocols in transfusion medicine.

The other options do not align as well with the requirements in transfusion settings. The red top tube is often used for serum collection and lacks anticoagulants, which is not suitable for blood typing. The yellow top tube is not typically used in transfusion settings either, as it may be more appropriate for other types of tests. Lastly, the green top tube contains heparin, which is not preferable for blood bank procedures, as it interferes with serological tests necessary for determining compatibility in transfusions.