NAPTP Specimen Processing and Handling 2

Question 1

Which of the following is a pre-analytical error that affects specimen quality?

Accepted Answer

Collecting a specimen from an IV line without proper protocol

Answer

Collecting a specimen from an IV line without proper protocol (e.g., not discarding the first few mL) is a pre-analytical error that dilutes the specimen and compromises results.

Question 2

How should aliquots be labeled when dividing a specimen into multiple tubes?

Accepted Answer

Each aliquot must be labeled with the same patient information as the original

Answer

Each aliquot must carry the same complete patient identification as the primary specimen to ensure traceability and prevent mix-ups.

Question 3

The recommended centrifuge speed for most routine serum or plasma separations is:

Accepted Answer

1,000–2,000 × g for 10 minutes

Answer

Most routine specimens are centrifuged at 1,000–2,000 × g for 10 minutes to achieve adequate separation without damaging cellular components.

Question 4

Which specimen requires protection from light during transport and processing?

Accepted Answer

Bilirubin

Answer

Bilirubin is photosensitive and degrades rapidly when exposed to light; specimens must be wrapped in foil or placed in an amber container.

Question 5

What is the purpose of a separator gel in SST or PST tubes?

Accepted Answer

To act as a physical barrier between cells and serum/plasma after centrifugation

Answer

The separator gel migrates during centrifugation to form a stable barrier between the cellular components and the serum or plasma, facilitating clean separation.

NAPTP - National Association of Phlebotomy Technician Professionals Practice Test

NAPTP - National Association of Phlebotomy Technician Professionals Practice Test

NAPTP Specimen Processing and Handling 2