Quality Assurance

Question 0

Factors to consider:

Answer 0

Staff
Quality of materials
Methods
Reagents
Pxn/physician satisfaction
Financial cost
Instruments
Reporting of test results

Question 1

Best possible service
Patient
Physician

Answer 1

Quality assurance

Question 2

Involves the procedures of monitoring and evaluation of characteristics of the test system.

Answer 2

Quality Control

Question 3

Only part of the quality assurance

Answer 3

Quality control

Question 4

With predetermined assay value; with same matrix as pxn sample

Answer 4

Control

Question 5

Reference material used to calibrate the instrument or prepare standard curves for manual assays

Answer 5

Primary std

Question 6

Reference material in which analyte conc. has been ascertained by reference to primary std.

Answer 6

Secondary std

Question 7

Preserved human or surrogate cell suspension whose hematology parameters have been determined by multireference lab and monitored daily by the distributor

Answer 7

Callibrator

Question 8

Nearness or closeness of measurement to the true/actual value

Answer 8

Accuracy

Question 9

Closeness of results obtained from repeated analysis of the sample.

Answer 9

Precision

Question 10

Comparing result from the analysis of the sample from the result of the previous sample of the same analyte

Answer 10

Delta checks

Question 11

Extent to which the method is able to maintain accuracy and precision overtime

Answer 11

Reliability

Question 12

Range of values

Answer 12

Reference values

Question 13

Most popular and well know measure of central tendency

Answer 13

Mean

Question 14

A measure of dispersion of values from the mean.

Answer 14

Standard Deviation

Question 15

Helps discribe the normal curve

Answer 15

Standard deviation

Question 16

Measure the distribution range

Measure of precision

Answer 16

Standard deviation

Question 17

A percentile expression of the mean and an index of precision

Answer 17

Coefficient of variation

Question 18

A measure of relative magnitude of variability

Answer 18

Coefficient of variation

Question 19

Proportion of patients with a disease who have a positive test result

Answer 19

Diagnostic sensitivity

Question 20

Lowest amount of a substance that ca be detected accurately by a test method

Answer 20

Analytical sensitivity

Question 21

Proportion of patients who are identified correctly by the test as not having the disease

Answer 21

Diagnostic specificity

Question 22

How well a test method can detect a particular substance rather than similar ones

Answer 22

Analytical specificity

Question 23

Proportion of patients without a disease who have a positive result compared with all patients who a positive test result

Answer 23

Positive predictive value

Question 24

Proportions of patients w/o a disease who have a negative test result compared w/ all patients who have a negative test result

Answer 24

Negative predictive value

Question 25

Errors within the test system or method | Affects the accuracy of a test method

Answer 25

Systematic error

Question 26

Incorrect calibration procedures Malfunctioning of components Failure of some part of the testing process

Answer 26

Systematic error

Question 27

Type of systematic error that the magnitude of error remains constant throughout the range of the test measurement

Answer 27

Constant error

Question 28

Type of systematic error that the magnitude of error increases with the conc. of subs. being measures

Answer 28

Proportional error

Question 29

Mistakes that occur without predictions/regularity

Answer 29

Random error

Question 30

Instability of instrument Change in temp Operator variability Affects boyh the accuracy but most is the precision of a test method

Answer 30

Random error

Question 31

Sources of error

Answer 31

Pre-analytical Analytical Post-analytical

Question 32

Misinterpreted physician test order

Answer 32

Pre-analytical

Question 33

Pxn midentification

Answer 33

Pre-analytical

Question 34

Errors in the actual testing of the specimens

Answer 34

Analytical

Question 35

Incorrect result entry

Answer 35

Post-analytical

Question 36

Incorrect pxn preparation

Answer 36

Pre-analytical

Question 37

Failure to notify the physician of critical result

Answer 37

Post-analytical

Question 38

Improper method of transport and handling

Answer 38

Pre-analytical

Question 39

Miscommunication of report to nursing unit/physician

Answer 39

Post-analytical

Question 40

Reports place in wrong patient chart

Answer 40

Post-analytical

Question 41

Incorrect sampling technique

Answer 41

Pre-analytical

Question 42

Improper collection container

Answer 42

Pre-analytical

Question 43

Analysis of control samples along with the patients samples and statistical evaluation of results to determine the acceptability of the analytical run

Answer 43

Internal qc

Question 44

Measure of precision overtime

Answer 44

Internal qc

Question 45

Indicated the mean and 1sd, 2sd, 3sd on both sides of the mean

Answer 45

Levey Jennings control chart

Question 46

Drift the values from one level of the control chart to another; either be sudden/gradual

Answer 46

Shift

Question 47

Continuous movement of values in one direction

Answer 47

Trend

Question 48

Samples will be used to the diff. lab by a reference lab. Proficiency testing programs

Answer 48

External QC