learnex

 
QC
  • Course Outline
    Click on a link in the outline to view a sample page from this course.

    • Definition of Quality Control
        • What is Quality Control?
    • Important Concepts in Quality Control
      • Controls
        • What is a Control?
        • Safety and Handling of Controls
        • Appearance of Controls
        • Why Run Controls?
        • Assayed and Unassayed Controls
        • What is an unassayed control?
      • Precision and Accuracy
        • Aiming for the Target
        • Closer, but not Quite
        • Bull's-eye!
        • An assayed glucose control produces the following results in 10 runs: 99, 99, 99, 98, 98, 98, 98, 97, 97, 97. The established range for this control i...
      • Specificity
        • Calculating Specificity
        • Specificity Example
        • Specificity Example: Test Results
        • Specificity Example: Calculations (1)
        • Specificity Example: Calculations (2)
        • Specificity Example: Comparison
        • Using the data and formula to the right, we can calculate specificity of the West Nile Virus test to be:
      • Sensitivity
        • Calculating Sensitivity
        • Sensitivity Example: Calculations (1)
        • Sensitivity Example: Calculations (2)
        • Sensitivity Example: Comparison
        • Specificity versus Sensitivity
        • Using the data and formula to the right, we can calculate sensitivity of the West Nile Virus test to be:
      • Random and Systematic Error
        • Types of Error
        • Random Error
        • Systematic Error
        • Indicate which of the problems in the list below are more likely to be random errors or systematic errors.
      • Internal and External Quality Control
        • Internal Quality Control
        • External Quality Control
        • External Quality Control, continued
        • External Quality Control, continued
        • Comparing Types of Quality Control
        • Match the type of quality control to the benefits it provides.
      • Reference Ranges
        • Reference Ranges
    • Quality Control Procedures, Documentation and Interpretation
      • Basic Terms
        • Mean
        • Histograms
        • Standard Deviation
        • Acceptable Standard Deviation (SD)
        • Establishing Quality Control Limits
        • In a normal distribution, approximately what percent of data would be more than +/- 3 standard deviations (SD) from the mean?
      • Levey-Jennings Chart
        • Levey-Jennings Control Charts
        • What is a Levey-Jennings Chart?
        • On which days did the control data fall at least one standard deviation from the mean?
      • Westgard Rules
        • Using Westgard Rules
        • Westgard Rule 13S
        • Westgard Rule 22S
        • Westgard Rule 41s
        • Westgard Rule R4s
        • The Levey-Jennings charts on the right represent two levels of control for an analyte. Do they show acceptable quality control results?
        • Does the Levey-Jennings chart to the right show acceptable quality control results?
        • Trends
        • Shifts
      • Cumulative Summation Limit
        • What is a Cumulative Summation Limit?
        • CUSUM Example: Plotting Control Data
        • CUSUM Example: Calculating CUSUM
        • CUSUM Example: Exceeding the CUSUM Limit
        • CUSUM and Westgard Rules
      • Youden Plot
        • What is a Youden Plot?
        • Using a Youden Plot
        • In the accompanying Youden plot, what conclusions can be drawn about the data?
    • Systematic Troubleshooting
        • Troubleshooting
        • Possible Corrective Actions
        • Possible Corrective Actions, continued
        • Possible Corrective Action, continued
        • Possible Corrective Action, continued
        • Possible Corrective Action, continued
        • QC testing has failed. The instrument operator has checked control and reagent dates and storage conditions and everything is acceptable. The operator...
    • Establishment of Verification of Method Performance Specifications
        • Verification of Performance Specifications for Nonwaived Testing
        • Verification for Nonwaived Testing
    • References
        • References