CPT (Certified Phlebotomy Technician) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the Certified Phlebotomy Technician Test with flashcards and multiple choice questions. Each question includes hints and explanations. Prepare for your exam efficiently!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What color tubes contain SST?

Green
Lavender
Red/Tiger Top
Blue

The correct answer is: Red/Tiger Top

The presence of Serum Separator Tubes (SST) is commonly associated with red/tiger top tubes. SST tubes are designed to separate serum from the blood cells following centrifugation due to their gel additive that forms a barrier. This separation is crucial for many laboratory tests as it ensures that serum is collected without contamination from cellular components. In contrast, the other tube colors mentioned have specific uses and additives that differ from SST tubes. Green tubes typically contain heparin as an anticoagulant, lavender tubes contain EDTA for complete blood counts and other hematological tests, and blue tubes are often used for coagulation studies and contain sodium citrate as an anticoagulant. None of these tubes provide the same serum separation feature associated with SST tubes, making the red/tiger top option the correct answer.