QUALITY CONTROL

Question 1

are values which are far from the main set of values due to wild errors

Answer 1

OUTLIERS

Question 2

errors in quality control; fundamental basis of statistical analysis.

Answer 2

VARIATIONS

Question 3

indicates a gradual loss of reliability in the test system

Answer 3

TREND

Question 4

ability of a method to measure only the component desired w/out interference of some substances present in the sample

Answer 4

SPECIFICITY

Question 5

range of analyte values that a method can directly measure on the specimen without any dilution, concentration or other pretreatment

Answer 5

ANALYTICAL MEASUREMENT RANGE (AMR)

Question 6

the ability of a method to determine the exact value of the substance of interest. It is the closeness of the value obtained with the true value

Answer 6

ACCURACY

Question 7

• Personnel
• Established laboratory policies
• Complete laboratory procedural manual

Answer 7

ANALYTICAL PHASE

Question 8

any deviation away from an expected result due to a definite cause

Answer 8

SYSTEMATIC

Question 9

errors in reporting, typing, writing

Answer 9

CLERICAL

Question 10

• Value reporting, turnaround time
• Preventive maintenance of equipment and reagents
• Patient satisfaction

Answer 10

POST-ANALYSTICAL PHASE

Question 11

a solution composed of several known constituent’s w/c can be run simultaneously w/ the test to check the accuracy of the result

Answer 11

CONTROL SOLUTION

Question 12

ability of a method to detect and measure even the smallest amount of the particular substance tested for

Answer 12

SENSITIVITY

Question 13

Abrupt changes in the control mean

Answer 13

SHIFT

Question 14

• will group any series of measurement in the same sample in a cluster around the mean in a bell shaped curve

Answer 14

GAUSSIAN CURVE

Question 15

the degree by w/c the method is easily repeated

Answer 15

PRACTICABILITY

Question 16

the ability of the method to give repeated results on the same
sample tat agree with one another

Answer 16

PRECISION / REPRODUCIBILITY

Question 17

TYPES OF ERROR:

any deviation away from an expected result due to unpredictable cause

Answer 17

RANDOM

Question 18

comparison of individual patient results throughout the day or week with computer detection of changes from earlier individual patient results

Answer 18

DELTA CHECK

Question 19

• plotted with the accumulated differences from the mean of individual values with the middle being zero
• also referred as the CUSUM graph

Answer 19

CUMULATIVE SUM GRAPH

Question 20

a statistical process used to monitor and evaluate the analytical process that produces patient results

Answer 20

QUALITY CONTROL

Question 21

solution of known characteristics and of known value. It is composed of one known constituent only and used as basis or reference for calculation of the value of the unknown

Answer 21

STANDARD SOLUTION

Question 22

an all-inclusive / comprehensive system monitoring the accuracy of test results where all steps before, during, and after the testing process are considered

Answer 22

QUALITY ASSURANCE

Question 23

• patients identification
• specimen information, collection, and handling

Answer 23

PRE-ANALYTICAL PHASE

Question 24

• the most commonly used histogram in QC
• also referred to as Levey-Jennings chart, S-L/J chart, Dot chart

Answer 24

SHEWHART-LEVEY JENNINGS CHART

Question 25

a system of ensuring precision and accuracy in the laboratory by using quality control reagents in every series of measurements.

Answer 25

QUALITY CONTROL

Question 26

sheet of rectangular coordinate graphing paper where data of sequential analysis are plotted to locate the source of error

Answer 26

HISTOGRAMS