Which Canary Yellow Tube contains ACD and is used for genetic marker testing?

Which Canary Yellow Tube contains ACD and is used for genetic marker testing?

• A. Canary Yellow Tube — SPS
• B. Canary Yellow Tube — ACD
• C. Lt Blue Tube — Na Citrate
• D. Gray Tube — Na Fluoride/K Oxalate

Answer: (B)

Genetic marker testing relies on preserving DNA in blood specimens, so the tube chosen must keep nucleic acids intact and available for extraction. The Canary Yellow Tube with ACD (acid citrate dextrose) is specifically designed to preserve leukocyte DNA, making it ideal for genetic marker analysis. The other options don’t serve this purpose: SPS in a Canary Yellow Tube is intended for blood culture and bacterial growth, not DNA preservation; the Lt Blue Tube with sodium citrate is used for coagulation studies; and the Gray Tube with sodium fluoride and potassium oxalate is used for glucose testing and glycolysis inhibition. Therefore, the Canary Yellow Tube containing ACD is the appropriate choice for genetic marker testing.

Genetic marker testing relies on preserving DNA in blood specimens, so the tube chosen must keep nucleic acids intact and available for extraction. The Canary Yellow Tube with ACD (acid citrate dextrose) is specifically designed to preserve leukocyte DNA, making it ideal for genetic marker analysis. The other options don’t serve this purpose: SPS in a Canary Yellow Tube is intended for blood culture and bacterial growth, not DNA preservation; the Lt Blue Tube with sodium citrate is used for coagulation studies; and the Gray Tube with sodium fluoride and potassium oxalate is used for glucose testing and glycolysis inhibition. Therefore, the Canary Yellow Tube containing ACD is the appropriate choice for genetic marker testing.