unit 6

Question 1

standards

Answer 1

substance of a KNOWN value

Question 2

control

Answer 2

known concentration of sample. Used to measure reproducibility

Question 3

Accuracy

Answer 3

how close a measurement is to a value measured by other measurement

Question 4

precision

Answer 4

the reproducubilty determined by control samples.

Question 5

Mean

Answer 5

average of all values

Question 6

median

Answer 6

middle value within range

Question 7

Mode

Answer 7

most frequency occurring value

Question 8

standard deviation

Answer 8

measures variation in distribution of values

Question 9

shift

Answer 9

an abrupt change from established mean

Question 10

trend

Answer 10

control values more in same direction on six consecutive days

Question 11

The joint commission enforces CLIA’88 requires what 4 things?

Answer 11

1. Assess the effectiveness of the labs policies and procedures
2. Identify and correct problems
3. Assure the accurate, reliable, and prompt reporting of test results
4. Assure the adequacy and competency of the staff

Question 12

What is quality assurance?

Answer 12

The process of assuring quality laboratory practices through systematic procedures.

Question 13

Proficiency testing

Answer 13

used to monitor accuracy of laboratory instrumentation and operates

Question 14

Proficiency testing is required by what college?

Answer 14

the college of american pathology

Question 15

what samples are tested in Proficiency testing ?

Answer 15

• Tested at multiple sites
• Multiple methods tested
• Samples must be reported within established range

Question 16

what happens if there is failure to achieve “acceptable” values for proficiency testing?

Answer 16

• Operator retraining

* Lab prohibited from performing tests

Question 17

quality control

Answer 17

controls ensure reliability and reproducibility of laboratory assays (tests)

Question 18

when should controls be tested?

Answer 18

Once a day
• When switching reagent lot numbers
• Certain maintenance
• After calibration
• Always before patient testing

Question 19

what type of chart is used to plot each level of quality control?

Answer 19

levey-jennings chart

Question 20

how is control range determined on a levey-jennings chart?

Answer 20

by calculating standard deviation

Question 21

flow of quality assurance?

Answer 21

1. doctor orders laboratory test
2. orders received by phlebotomist or laboratorian
3. patient’s blood is collected
4. patient’s blood is collected
5. patient’s blood (specimens) are transported to laboratory
6. specimens are received and processed by the laboratory
7. specimens are tested by appropriate department
8. results are tansmitted to ordering doctor