Deck 29: Quality Control in the Hematology Laboratory

Question 1

Calculate the mean of the following hemoglobin values: 6.2, 8.1, 7.9, 9.0, 5.8, 6.6, 7.3, 8.4, 10.2, 11.6

A) 7.3
B) 8.1
C) 8.6
D) 7.8

Answer 1

8.1

Question 2

Which of the following is a cause of a shift?

A) Rerunning a control material
B) Not performing maintenance when due
C) Improperly prepared reagent
D) Analyzing a patient sample without a barcode

Answer 2

Improperly prepared reagent

Question 3

Which of the following is not considered a preanalytical factor?

A) Proper identification of the patient
B) Labeling the specimen at the bedside
C) Transporting the specimen to the laboratory
D) Entering patient's results into the computer

Answer 3

Entering patient's results into the computer

Question 4

Calculate the coefficient of variation with the following data: mean = 7.2; SD = 0.42; median = 7.6; mode = 7.5.

A) 5.5%
B) 5.6%
C) 5.8%
D) 5.2%

Question 5

Which of the following is a part of quality assurance?

A) Procedure manual
B) Equipment function checks
C) Calibration verification procedures
D) All of the above

Question 6

Which quality approach maximizes customer value?

A) Root cause analysis
B) FMEA
C) Benchmarking
D) Lean

Question 7

Which Westgard rule refers to two consecutive data points exceeding the ±2 SD limit?

A) 1_2s
B) 1_3s
C) 2_2s
D) 4_1s

Question 8

Which quality approach requires performance to be measured against another world-class company?

A) Root cause analysis
B) Failure Mode and Effects Analysis (FMEA)
C) Benchmarking
D) Lean

Question 9

Which of the following is the most common source of laboratory errors?

A) Preanalytical factors
B) Analytical factors
C) Postanalytical factors
D) Nonanalytical factors

Question 10

A sudden and consistent movement from the mean is a ______________.

A) Shift
B) Trend
C) Titration
D) Dilution

Question 11

Which Westgard rule refers to one data point exceeding the ±3 SD limit?

A) 1_2s
B) 1_3s
C) 2_2s
D) 4_1s

Question 12

Which of the following is not considered a postanalytical factor?

A) Entering patient's results into the computer
B) Calculating patient's results
C) Transporting the specimen to the laboratory
D) Notifying physician of patient's results

Question 13

Which of the following is a cause of a trend?

A) Improperly prepared reagents
B) Improperly stored reagents
C) Change in lot numbers
D) Bacterial contamination of diluent/H₂O

Question 14

Which quality approach is used after a problem occurs to investigate the cause of the problem?

A) Root cause analysis
B) FMEA
C) Benchmarking
D) Lean

Question 15

Which of the following regulates all clinical laboratory testing?

A) Centers for Medicare & Medicaid Services (CMS)
B) Clinical Laboratory Improvement Amendments (CLIA)
C) Food and Drug Administration (FDA)
D) College of American Pathologists (CAP)

Question 16

Which quality approach tries to identify the cause and impact of a failure before it happens?

A) Root cause analysis
B) FMEA
C) Benchmarking
D) Lean

Question 17

A gradual change in the same direction is a ___________.

A) Shift
B) Trend
C) Titration
D) Dilution

Question 18

Which of the following can be considered a matrix?

A) Urine
B) Whole blood
C) Synovial fluid
D) All of the above

Question 19

Which of the following is not considered part of a quality test?

A) Accurate and precise
B) Unreasonable cost
C) Free of defects
D) Good customer service

Question 20

Which Westgard rule refers to one data point exceeding the ±2 SD limit?

A) 1_2s
B) 1_3s
C) 2_2s
D) 4_1s

Question 21

Which of the following is an example of a random error?

A) Bubbles in syringes
B) Leaky tubing
C) Clogs in tubing
D) All of the above

Question 22

Which Westgard rule refers to four consecutive control measurements exceeding the +1 SD or -1 SD limit on the same side of the graph?

A) 1_2s
B) 1_3s
C) 2_2s
D) 4_1s