QA AND QCII

Question 1

reporting a positive result in a patient who has a the disease

a. TP
b. FP
c. TN
d. FN

Answer 1

True positive
reporting a POSITIVE result in a patient WHO HAS a the disease

false negative
reporting a positive result in a patient who DOESN’T have the disease

Question 2

reporting a negative result in a patient who has a the disease

a. TP
b. FP
c. TN
d. FN

Answer 2

false negative
reporting a NEGATIVE result in a patient WHO HAS a the disease

true negative
reporting a negative result in a patient who doesn’t have disease

Question 3

% of population with the disease that test positive

a. diagnostic sensitivity
b. diagnostic specificity
c. positive predictive value
d, negative predictive value

Answer 3

diagnostic sensitivity
% of population WITH THE DISEASE that test positive

diagnostic specificity
% of population WITHOUT THE DISEASE that test positive

Question 4

MOST COMMON PRESENTATION FOR EVALUATING QC RESULTS

a. shewart plot
b. gaussian curve
c. levey jennings control chart

Answer 4

levey jennings control chart

• also known as SHEWART PLOT
• most common presentation for evaluating QC results

Question 5

which of the following errors has a main cause is deterioration of reagents

a. trend
b. shift
c. outliers

Answer 5

trend

• control values increase or decreasing for six consecutive runs
• main cause : deterioration of reagents

Question 6

which of the following errors is six consecutive control values on the same side of the mean

a. trend
b. shift
c. outliers

Answer 6

shift

• six consecutive control values on the same side of the mean
• main cause: improper calibration of specimen

Question 7

what type of error is 1(3S)

a. systematic
b. randome

Answer 7

systematic

• 2 (2S)
• 4(1S)
• 10x

random

• 1(3S)
• R (4S)

Question 8

which of the westgard rules is the warning flag

a. 1(2S)
b. 1(3S)
c. 2(2S)
d. aota

Answer 8

1(2S)

Question 9

what kind of error is sampling error

a. random
b. systemic

Answer 9

random error

1. error due to dirty glassware
2. use of wrong pipet
3. voltage fluctuation
4. sampling error
5. anticoagulant/drug interference

Question 10

consists of evaluation of method performance by comparison of results vs those other laboratories for the same set of samples

a/ random error

b. proficiency testing
c. diagnostic sensitivty

Answer 10

proficiency tetsing