Lavender or pink tubes correspond to which draw?

Lavender or pink tubes correspond to which draw?

• A. 5th draw
• B. 6th draw
• C. 7th draw
• D. 8th draw

Answer: (B)

Lavender and pink tubes both contain EDTA, an anticoagulant used for hematology tests (like CBC) and some blood bank tests. The order of draw is designed to prevent carryover of additives from one tube into the next, because EDTA can alter results if it contaminates other tests or tests that rely on intact calcium levels. In this NHCO order of draw, EDTA tubes are placed after the tubes with other additives, making them the sixth position. That’s why lavender or pink tubes correspond to the sixth draw.

Lavender and pink tubes both contain EDTA, an anticoagulant used for hematology tests (like CBC) and some blood bank tests. The order of draw is designed to prevent carryover of additives from one tube into the next, because EDTA can alter results if it contaminates other tests or tests that rely on intact calcium levels.

In this NHCO order of draw, EDTA tubes are placed after the tubes with other additives, making them the sixth position. That’s why lavender or pink tubes correspond to the sixth draw.