Certified Phlebotomy Technician Exam Quality Assurance and Laboratory Operations

Question 1

What does the term 'hemolysis' mean in the context of a blood specimen?

Accepted Answer

Rupture of red blood cells releasing hemoglobin into the plasma

Answer

Hemolysis is the destruction of red blood cells, releasing hemoglobin and intracellular contents that interfere with many laboratory tests.

Question 2

Which of the following is an example of a pre-analytical error in phlebotomy?

Accepted Answer

Mislabeling a specimen tube at the bedside

Answer

Mislabeling a specimen is a pre-analytical error occurring before the sample reaches the laboratory, and it is one of the most common and dangerous errors.

Question 3

What information is required on a properly labeled specimen tube according to CLSI standards?

Accepted Answer

Patient full name, date of birth, collection date and time, and collector ID

Answer

CLSI requires patient full name, date of birth, collection date and time, and the collector's identification on every labeled tube.

Question 4

What is the maximum recommended time a centrifuged specimen should sit before aliquoting to prevent result changes?

Accepted Answer

2 hours

Answer

Serum or plasma should be aliquoted within 2 hours of centrifugation to prevent analyte degradation and cellular metabolism changes.

Question 5

Which document must accompany a specimen when it is transported to a reference laboratory?

Accepted Answer

Chain of custody form or requisition with required identifiers

Answer

A chain of custody form or test requisition with patient identifiers, test ordered, and collection details must accompany all specimens sent to reference labs.

Certified Phlebotomy Technician Exam Practice Test

Certified Phlebotomy Technician Exam Practice Test

Certified Phlebotomy Technician Exam Quality Assurance and Laboratory Operations