4.b Quality Assurance Flashcards

Random error to Proficiency Testing

1
Q

Variation/Error present in all measurements, due to chance

A

RANDOM ERROR

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2
Q

improper calibration, deterioration of reagents, sample instability, changes in standard materials, instrument drift

Systematic Error
T/F?

A

T

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3
Q

mislabeling of sample, pipetting errors, improper mixing of sample and reagent, voltage fluctuations, temperature fluctuations

Random error
T/F?

A

T

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4
Q

most widely used quality control chart

A

Levey-Jennings Chart (Shewhart Plot)

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5
Q

dependent variable; vertical line; analyte concentration

A

Y-axis

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6
Q

independent variable; horizontal line; date or time

A

X-axis

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7
Q

What is the main cause of a trend in an analytical process?

A) Improper calibration of the instrument
B) Deterioration of reagents
C) Contamination of samples
D) Environmental changes

A

B

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8
Q

T/F

Trend is the gradual changes in the data

A

T

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9
Q

What is the main cause of a shift in an analytical process?

A) Improper calibration of the instrument
B) Deterioration of reagents
C) Variations in sample temperature
D) Inconsistent reagent mixing

A

A

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10
Q

T/F

Shift is the lagging change in data

A

F

Shift is the sudden/abrupt change in data

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11
Q

Control values that are far from the main set of values

A

OUTLIERS

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12
Q

systematic error

odd or even

A

even

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13
Q

random error

odd or even

A

odd

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14
Q

Westgard Multirule

One control value exceeds 2SD =

A

12s

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15
Q

One control value exceeds 3SD =

A

13s

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16
Q

The range of 2 consecutive control values are 4 SDs apart =

17
Q

Four consecutive control values exceed 1SD =

18
Q

Two consecutive control values exceed 2SD =

19
Q

Ten consecutive control values are on the same side of the mean =

20
Q

Warning or Screening Rule for Rejection

21
Q

Westgard multirule for random error

A

12S, 13S, R4S

22
Q

Westgard multirule for systematic error

A

22S, 41S, 10x

23
Q

Comparison of previous results with the current result

A

DELTA CHECK

24
Q

The next step in the connectivity process is TRANSMITTAL OF TEST RESULTS from the data manager to the LIS and/or hospital information system (HIS).

This is the INTERFACE PORTION of connectivity. (6th ed Bishop)

25
Q

ASAP means

A

“as soon as possible”

26
Q

stat is an American medical term
meaning _ (from the Latin “_”).

A

“immediately”

statim

27
Q

is the evaluation of practitioner performance against pre- established criteria.

A

Proficiency testing

28
Q

may be used for inter-laboratory comparisons

A

External proficiency testing

29
Q

may be used for intra-laboratory
comparisons

A

internal proficiency testing