Search the Web

Custom Search

Monday, May 25, 2015

Review Questions on Quality Control and Quality Assurance



1.        Quality Control Charts (QCC) are useful in demonstrating:
a. average                                                                    d. analytical trends
b. median                                                                    e. all of the above
c.    accuracy

2.        The percentage of values of the normal population INCLUDED within the acceptable range is:
a. 85.6 %                                                                     d. 65.5 %
b. 95 %                                                                        e. NIL
c. 79.9 %

3.        The following may be used to analyze quality control data, EXCEPT:
a. Levey-Jennings plot                                                d. Westgard Rules
b. Shewhart Plot                                                         e.  NIL
c. trends and shifts

4.        The extent to which measurements agree to the true value of the quantity being measured is known as:
a. precision                                                                  d. reliability
b. accuracy                                                                  e. NIL
c. acceptable limits                                                                                                     

5.        The repeatability of test measurements is referred to as:
a. predictability                                                           c. precision      e. NIL
b. accuracy                                                                  d. reliability

6.        The middle value of a set of numbers that are arranged according to their value is known as:
a. median                                                                     c. arithmetic mean       e. NIL
b. coefficient of variation                                           d. mode

7.        The +- 2 SD range excludes the following percentage values, in a Gaussian distribution:
a. 5.5 %                                                                       c. 12.7 %           e. NIL
b. 31.3 %                                                                     d. 12.7%


8.  Compute for the coefficient of variation when +- 1SD = +-9 mg/dL and the mean is 90 mg/dL:
            a. 10.2 %                                                                     c. 13.5 %         e. NIL
            b. 5.8 %                                                                       d. 14.1 %

9.      When establishing a reference range, it is most desirable to obtain  specimens from at least the following number of individuals:
a. 125                                                                          c. 100              e. NIL
b. 250                                                                          d. 10

10.  The following should be taken into consideration when establishing a reference range, EXCEPT:
a. age                                                                           d. medical history
b. sex                                                                           e. NIL
c.    Sampling time
                                   
11.  When data fluctuation are due to chance and results are seen to vary in either direction, the problem is referred to as:
a.       systematic error                                         e. NIL
b.      random error
c.       traditional error
d.      all of the above                                                                

12.  This process encompasses all aspects of laboratory operation including patient ID, specimen collection, assaying and recording:
a. quality control                                             c. quality assurance     e. NIL
b. external control                                           d. internal control

13.  The following  Westgard Rules indicate a random error:
a.    1 (2S), 1 (3S), R (4S)
b.    10 X , 2 (2S), 1(3S)
c.    2 (2S), 1 (2S), 1 (3S)
d.    R (4S), 2 (2S), 2 (1S)
e.    NIL

14.  What is the importance of an external quality assurance program to the laboratory?
a.       Provides a means to compare tests performed by different sections within the same laboratory.
b.      Assessment of its performance in comparison with other laboratories using the same methods
c.       Provides data confirmation with previous tests on the same patient
d.      Provides reference intervals as basis of tests
e.       NIL

15.  An abrupt shift in the daily values of a Q.C chart is likely to be the result  of:
a.       Error in the quality control chart
b.      Shifting of operating technologist
c.       Calibrating the sample aspiration probe of the machine
d.      Varying the wavelength during a sample run
e.       Using new standards simultaneously with the current standard  kit
f.       NIL

16.  Which of these are classified as random errors?
1.      Mispipetting
2.      Mislabeling of sample
3.      Improper mixture of sample and reagent
4.      Sample instability
5.      Deterioration of reagent

A.    1 and 2           B. 3 and 4        C. 1,2 and 3    D. all  of the above     E. NIL

17.  Which of these is a good practice in the use of laboratory coats?
a.       Never  leave laboratory coat in the workplace
b.      Use secondary laboratory coat when performing phlebotomy outside the laboratory
c.       Use laboratory coat only when inside the laboratory
d.      Laboratory coat must be cleaned at home before coming to the workplace
e.       NIL

18. The following are included in patient identification, EXCEPT:
    a.  Introduce yourself before anything else.
    b.  Confirm identity of patient by stating his/her name.
    c.   Check for the age, sex and requested tests.
    d.   Explain the procedure briefly
    e.   NIL

19. These are considered as trend errors, EXCEPT:
    a.  mispipetting
    b.  mislabeling
    c.  improper mixing
    d.  prolonged incubation
    e.  NIL

20. The following are considered as systematic errors, EXCEPT:
    a. expired reagents
    b. uncalibrated apparatus
    c. fluctuating voltage
    d. inappropriate temperature
    e. NIL

CHOICES FOR NUMBERS 21 to 24
ARRANGE CHRONOLOGICALLY THE FOLLOWING STEPS IN QUALITY CONTROL CHART PREPARATION:

A.    Solve for SD
B.     Solve for mean
C.     Plot SDs
D.    Determine +- 1, 2 and 3 SDs

25. For you to be able to interpret a quality control chart, you must have this number of data:
    A. 20 control values                                                C. 20 standard values
    B. 10 control values                                                D.10 standard values
                                                                                     E. NIL

CLICK FOR ANSWERS HERE

No comments:

Post a Comment