For which clinical purpose is Potassium EDTA primarily used in a Pink tube?

Potassium EDTA is primarily used in a pink tube specifically for blood bank testing and the purpose of facilitating transfusions. This anticoagulant works effectively by binding calcium in the blood and preventing clotting, which is essential for accurate blood typing and crossmatching prior to transfusions.

In blood bank procedures, samples in pink tubes are used to ensure that the blood components are accurately tested for compatibility. This is crucial for preventing transfusion reactions that can occur if incompatible blood types are mixed. The pink-top tube is universally recognized in laboratories for maintaining the integrity of the blood sample needed for these critical tests.

Other tubes or additives may support other types of tests mentioned in the options, but the unique role of Potassium EDTA in the pink tube is specifically aligned with blood bank testing and ensuring safe and successful transfusion practices.