NCCT National Certified Phlebotomy Technician MCQ 2

Question 1

Which of the following is the correct order of draw when using the evacuated tube system?

Accepted Answer

Blood cultures, light blue, red/SST, green, lavender, gray

Answer

The correct CLSI order of draw is: blood cultures (yellow SPS), light blue (citrate), red/SST (serum), green (heparin), lavender (EDTA), gray (oxalate/fluoride).

Question 2

A patient's PT (prothrombin time) result is prolonged. Which pathway of the coagulation cascade is primarily being evaluated?

Accepted Answer

Extrinsic pathway

Answer

PT primarily evaluates the extrinsic pathway (Factor VII) and the common pathway (Factors X, V, II, and fibrinogen) of the coagulation cascade.

Question 3

Which test requires blood to be collected in a sodium fluoride/potassium oxalate (gray-top) tube?

Accepted Answer

Blood glucose

Answer

Gray-top tubes containing sodium fluoride and potassium oxalate are specifically designed for glucose testing because sodium fluoride inhibits glycolysis.

Question 4

An Allen test is performed before collecting blood from which site?

Accepted Answer

Radial artery

Answer

The Allen test evaluates collateral circulation to the hand via the ulnar artery before a radial artery puncture.

Question 5

Which of the following conditions would be a contraindication for blood collection from a specific arm?

Accepted Answer

An IV is running in that arm

Answer

An arm with an active IV line is contraindicated for blood collection because IV fluids will contaminate the specimen and produce inaccurate results.

NCCT - National Certified Phlebotomy Technician Exam Practice Test

NCCT - National Certified Phlebotomy Technician Exam Practice Test

NCCT National Certified Phlebotomy Technician MCQ 2