Blue top blood tube is associated with which test?

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Multiple Choice

Blue top blood tube is associated with which test?

Explanation:
Blue top tubes contain sodium citrate, an anticoagulant that binds calcium to prevent clotting and preserve plasma for testing. Coagulation tests rely on measuring the clotting process in plasma, not serum, and require a precise blood-to-anticoagulant ratio (usually 9:1). This makes blue-top tubes the standard for coagulation studies such as PT, aPTT, INR, and related coagulation panels, sometimes referred to as Comparative Coagulations. In contrast, chemistry tests typically use serum or different anticoagulants, and routine hematology uses lavender tubes with EDTA.

Blue top tubes contain sodium citrate, an anticoagulant that binds calcium to prevent clotting and preserve plasma for testing. Coagulation tests rely on measuring the clotting process in plasma, not serum, and require a precise blood-to-anticoagulant ratio (usually 9:1). This makes blue-top tubes the standard for coagulation studies such as PT, aPTT, INR, and related coagulation panels, sometimes referred to as Comparative Coagulations. In contrast, chemistry tests typically use serum or different anticoagulants, and routine hematology uses lavender tubes with EDTA.

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