A system that verifies the reliability of analytical test results through the use of standards, controls and statistical analysis
What is Quality Control (QC)
100
A quality control chart used to record daily quality control values
What is Levey Jenning
100
Errors that occur before actual analysis takes place, yet still may affect test results
What is Pre-analytical
100
Expresses the standard deviation as a percentage; compares the relative variability between different sets of data; the lower the CV, the higher the precision
What is Coefficient of Variation
100
The skewing of test results away from the true value
What is Bias
200
An indication of error in the analysis; detected by increasing or decreasing values in the control sample
What is Trend
200
The process of checking, standardizing, or adjusting a method or instrument so that it yields accurate results
What is Calibration
200
Errors that occur during the analysis
What is Analytical
200
Formula for finding the mean
What is Mean equals the sum of the data multiplied by each value in the data set divided by number of values in the data set
200
Ability of a test to correctly identify the absence of a given disease or condition
What is Diagnostic Specificity
300
An assayed sample that is sent as an unknown to laboratories participating in proficiency testing programs
What is Blind Sample
300
A measure of how close a determined value is to the true value
What is Accuracy
300
Errors within the test or method that affect the accuracy of a test method
What is Systematic
300
Formula for variance
What is Variance equals sum of the data multiplied by each value in the data set minus the mean squared divided by the number of values in the data set
300
Ability of a test to detect a given disease or condition
What is Diagnostic Sensitivity
400
Everything related to the actual test process (test analysis, quality control, reagents)
What is Analytical
400
The mean; the sum of a set of values divided by the number of values
What is Average
400
An abrupt change from the established mean indicated by the occurrence of all control values on one side of the mean
What is Shift
400
Calculate the mean: 3.2, 3.3, 3.5, 3.2, 3.0, 3.4, 3.8, 3.5, 3.4, and 3.3
What is 3.4
400
Patients without the condition who are classified by the test to have the condition
What is False Positive
500
The Gaussian bell-shaped curve
What is Normal Distribution
500
In the lab, a program that monitors the total testing process with the aim of providing the highest quality patient care
What is Quality Assessment (QA) (Quality Assurance)
500
Errors that affect the handling of the test result after the analysis has taken place
What is Post-analytical
500
Bell-shaped, represents the ideal distribution of test values obtained from a single lot of control serum, values in between the +2SD and -2SD suggests properly functioning procedure, equipment, and reagents
What is Normal Distribution
500
Involves comparing the result from the analysis of a sample with the result from the previous sample for the same analyte for the same patient