CPCT Phlebotomy and Specimen Collection 3

Question 1

What does a light blue-top tube contain, and what test is it used for?

Accepted Answer

Sodium citrate; used for coagulation studies

Answer

Light blue-top tubes contain sodium citrate, an anticoagulant that binds calcium to prevent clotting, making them essential for PT, PTT, and INR coagulation tests.

Question 2

What is the minimum number of times a lavender-top tube should be inverted after collection?

Accepted Answer

8 to 10 times

Answer

Lavender-top tubes should be gently inverted 8 to 10 times to ensure EDTA is fully mixed with the blood and prevent clotting.

Question 3

Which of the following specimens must be kept warm (at body temperature) after collection?

Accepted Answer

Cryoglobulin specimen

Answer

Cryoglobulin specimens must be kept at 37°C (body temperature) because cryoglobulins precipitate at cooler temperatures, which would affect test results.

Question 4

What is the proper disposal method for used needles after venipuncture?

Accepted Answer

Place uncapped needle directly into a sharps container

Answer

Used needles must be immediately discarded uncapped into an approved sharps container to prevent needlestick injuries and comply with OSHA standards.

Question 5

Which laboratory test requires a fasting specimen from the patient?

Accepted Answer

Fasting blood glucose

Answer

Fasting blood glucose requires the patient to fast for at least 8 hours because recent food intake raises blood sugar levels and produces inaccurate results.

CPCT - Certified Patient Care Technicians Practice Test

CPCT - Certified Patient Care Technicians Practice Test

CPCT Phlebotomy and Specimen Collection 3