M6 Flashcards
Which Westgard rule is violated when there is at least a 4SDs difference between control values within a single run?
13s
R4s
22s
41s
-R4s
In spectrophotometric analysis, which of the following is necessary to solve for the concentration of the patient’s sample?
Concentration of the unknown
Concentration of the standard
Optical density of the control
Absorbance of the blank
Concentration of the standard
What is the ± 3SD if the SD is 1.95 and the mean value is 12.86?
+ 3SD = 18.71; - 3SD = 7.01
+ 3SD = 75.231; - 3SD = 7.15
+ 3SD = 38.58; - 3SD = 4.67
+ 3SD = 4 95: - 3SD = 1.59
-+ 3SD = 18.71; - 3SD = 7.01
How do you interpret the data in table 1 below?
All Reagents showed good precision all throughout the 3 levels of control.
Reagent Kits 1, and 2 demonstrated better precision in the low and normal
range than reagent kit 3. However, in high end of control, all showed a lack of precision.
Reagent 3 demonstrated better precision in the high range of the control than the other 2 kits, however in 2 levels, all showed a lack of precision.
Reagent Kit 1, 2, and 3 demonstrated better precision in the low and normal range, however in the high end of control, all showed a lack of precision.
`-Reagent Kit 1, 2, and 3 demonstrated better precision in the low and normal range, however in the high end of control, all showed a lack of precision.
How would you define quality assurance?
The process monitoring and assessing that the laboratory results are as accurate as possible
The process of monitoring and assessing the analytical phase of testing using materials to assess all testing parameters
It is used to verify the acceptability of new methods prior to test implementation and reporting patient result
It estimates the random error associated with the test method and detects any problems affecting its reproducibility
-The process monitoring and assessing that the laboratory results are as accurate as possible
What is the measure of the dispersion of the obtained values around the mean?
Limit of confidence
Standard deviation
Mean
Coefficient of Variation
-Standard deviation
Shaun plotted the values for the pathological control for Uric Acid as shown in the image below. Most of the control results are within the +/-2sd with one value outside -3SD. What pattern can be observed?
A downward trend can be observed from days 10-16
An upward shift on days 5-10 is seen
No pattern to indicate an error can be observed
A downward shift can be observed from days 10-16
-A downward shift can be observed from days 10-16
The sample below will be used for HbA1c testing. Based on the image what type of error is being presented?
Analytical
Pre-Analvtical
No error
Post-Analytical
Pre-Analvtical
Below are the QC values expressed in conventional unit for glucose. Calculate the SD using the given data and interpret the result.
The data presents a low standard deviation, indicating the closeness of the data to each other and reflecting the preciseness of the machine/reagent.
Standard deviation is high, showing precision of the machine or reagent used.
The standard deviation of the data is with low, indicating that the machine or reagent is imprecise and should be replaced.
Standard deviation of the results is too high, showing imprecision of the machine or the reagent.
The data presents a low standard deviation, indicating the closeness of the data to each other and reflecting the preciseness of the machine/reagent.
Which of the following control rules detects Random error?
41s
10x
13s
22s
-13s
Which of the following data is often used as the limit of confidence in plotting a QC chart?
+/- 2SD
+/-3SD
+/- 1SD
Mean
-+/- 2SD
From the activities below, determine which of these can be done by a laboratory as a part of the quality control program.
1. Running low, normal, and high control solutions daily.
2. Plotting Levey Jennings chart using statistical data.
3. Registering for NEQAS Cycle Program for proficiency testing
1,3
1,2
2,3
1,2,3
-1,2,3
Which of the following institution works in coordination with the DOH-Bureau of Health Facilities and Services to maintain a quality assurance program for laboratory testing in Clinical Chemistry?
Philippine Food and Drug Administration (PDFA)
Research Institute for Tropical Medicine (RITM)
National Kidney Transplant Institute (NKTI)
Lung Center of the Philippines (LCP)
-Lung Center of the Philippines (LCP)
Which of the following measures of center can have more than two values?
Standard deviation
Median
Mode
Mean
-Mode
Which statement best describes the function of quality control?
Assures the accurate, reliable and prompt reporting of results.
Prevention on the reporting of incorrect patient test results.
Identifies and corrects problem.
Assures the adequacy and competency of the laboratory staff.
Identifies and corrects problem.
