01
Front
What is the order of draw?
Back
The order of draw is the sequence for collecting blood into multiple tubes during one venipuncture; following it helps reduce additive or microorganism carryover.
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3 Order of Draw Free Online FlashCards
Study 3 Order of Draw with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
12 cards
02
Front
What is the common core order of draw?
Back
The common core sequence is blood cultures → light blue (citrate) → serum → green (heparin) → lavender or pink (EDTA) → gray (fluoride/oxalate).
03
Front
Why are blood-culture bottles collected first?
Back
Blood-culture bottles are collected first to help protect culture specimens from contamination by material in other collection tubes.
04
Front
What additive and common use are associated with light-blue tubes?
Back
Light-blue tubes contain sodium citrate and are commonly used for coagulation tests.
05
Front
Which tube types are included in the serum step?
Back
Serum tubes include red, gold, and tiger-top tubes; they may contain a clot activator, and gold or tiger-top tubes often include separator gel.
06
Front
What is the common additive and use of green tubes?
Back
Green tubes contain heparin, with or without separator gel, and are commonly used for plasma chemistry.
07
Front
What are the common uses of lavender and pink tubes?
Back
Lavender and pink tubes contain EDTA; they are commonly used for hematology and blood-bank testing, respectively.
08
Front
What additive combination and testing purpose are common for gray tubes?
Back
Gray tubes commonly contain sodium fluoride with potassium oxalate and are often used for glucose-related testing.
09
Front
How should the order for specialty tubes be determined?
Back
Place specialty tubes according to their additive and the laboratory’s instructions, not cap color alone; colors and formulations can vary.
10
Front
Which measurements can EDTA contamination interfere with?
Back
EDTA contamination can interfere with calcium and potassium measurements.
11
Front
What testing can heparin or citrate carryover affect?
Back
Heparin or citrate carryover can affect coagulation testing.
12
Front
What should you avoid doing with blood from separate collection tubes?
Back
Do not transfer blood between collection tubes or combine specimens from different tubes.