End of Chapter Questions, Module 3

Question 1

An example of a factor in preanalytic testing is

Answer 1

patient identification

Question 2

An example of a factor in analytic testing is

Answer 2

accuracy in testing

Question 3

An example of a factor in post-analytic testing is

Answer 3

critical value reporting

Question 4

Blood from the wrong patient is an example of an error classified as

Answer 4

preanalytic

Question 5

A specimen collected in the wrong evacuated tube is an example of an error classified as

Answer 5

preanalytic

Question 6

A quality control value outside of an acceptable limit is an example of an error classified as

Answer 6

analytic

Question 7

the term accuracy means

Answer 7

How close a test result is to the true value

Question 8

The term control means

Answer 8

Specimen similar to patient’s blood; known concentration of constituent

Question 9

The term precision means

Answer 9

how close results are to one another when repeatedly analyzed

Question 10

The term sensitivity means

Answer 10

subjects with a specific disease or condition produce a positive result

Question 11

The term specificity means

Answer 11

Subjects without a specific disease or condition produce a negative result

Question 12

The type of error caused by omitting patient serum or reagent from a test mixture is a

Answer 12

false-negative error

Question 13

The type of error caused by using dirty glassware is a

Answer 13

false-positive error

Question 14

The type of error caused by the addition of the wrong reagent is a

Answer 14

false positive or false negative error

Question 15

The type of error caused by inaccurately recording results is a

Answer 15

false positive or false negative error

Question 16

The type of error caused by using hemolyzed patient serum is a

Answer 16

false positive error

Question 17

in a written procedural protocol, the ___ should follow the name of the procedure and name of the test method

Answer 17

principle and purpose of the test

Question 18

In a written procedural protocol, the ___ should follow the specimen collection and storage information

Answer 18

quality control

Question 19

In a written procedural protocol, the ___ should follow the list of reagents, supplies, and equipment

Answer 19

procedural protocol

Question 20

In a written procedural protocol, the ____ should follow the reference values and procedural notes

Answer 20

sources of error

Question 21

If testing cannot be done within ___ hours of collection, a serum specimen should be frozen at -20 degrees celcius

Answer 21

72

Question 22

Complement can be inactivated in human serum by heating to ___ degrees celcius

Answer 22

56

Question 23

A specimen should be reinactivated when more than ___ hours have elapsed since inactivation

Answer 23

4

Question 24

A graduated pipette can be used when

Answer 24

extreme accuracy is not needed

Question 25

A meniscus is the

Answer 25

curvature at the top surface of a liquid

Question 26

Automatic pipettes have the advantage of

Answer 26

being fast
allowing the repetitive measurement of solutions
delivering equal volumes of solutions

Question 27

A dilution is a(n)?

Answer 27

Ratio of volume or number of parts of the substance to be diluted in the total volume, or parts, of the final olution
Indication of relative concentration
Frequently used in measuring serologic testing

Question 28

If a serial dilution is prepared in 1:2 dilutions, the final dilution in tube 6 is

Answer 28

1:64

Question 29

To prepare 10 mL of a diluted serum specimen 1:10, ___ part of serum is needed

Answer 29

1.0

Question 30

To prepare 10 mL of a diluted serum specimen 1:10, ___ part(s) of a distilled water are needed to reach the total volume

Answer 30

9

Question 31

Serum for detection of antibodies should be drawn during the

Answer 31

acute and convalescent phases of illnesses

Question 32

A central concept of serologic testing is

Answer 32

manifestation of a rise in antibody titer

Question 33

A major advantage of rapid POCT testing is

Answer 33

Faster turnaround time

Question 34

Rapid testing assays are usually in the ___ CLIA category

Answer 34

waived

Question 35

Over-the-counter test kits are in the ___ CLIA category

Answer 35

Waived

Question 36

Rapid turnaround time ____ an important characteristic of POCT

Answer 36

is

Question 37

Ease of performance ___ an important characteristic of POCT

Answer 37

is

Question 38

Storage temperature of reagent __ an important characteristic of POCT

Answer 38

is

Question 39

Length of time until reagent expiration ___ an important characteristic of POCT

Answer 39

is