Download presentation
Presentation is loading. Please wait.
1
Lesson 1-9 Quality Assessment
2
Quality Assessment (QA)
Changing terminology Quality Control, Quality Assurance Quality Assessment, Continuous Quality Improvement, Total Quality Management Quality Systems
3
Quality Assessment (QA)
QA programs required by Clinical Laboratory Improvement Act ’88 (CLIA) Goal Ensure reliable test results Improve patient care
4
Components of Quality Systems Program
Personnel qualifications and training Participation in proficiency testing Blind samples Results compared to those from other laboratories
5
Components of Quality Systems Program
Quality assessment (QA) Preanalytical factors Postanalytical factors Analytical factors
6
Preanalytical Factors
Patient and specimen identification Specimen collection Selection of test method Qualified testing personnel Up-to-date procedure manual
7
Postanalytical Factors
Calculations Reporting results Charting results Reduced errors Computers Bar-coded labels
8
Analytical Factors Sample preparation
Instrument maintenance and calibration Standards and controls Test procedure
9
Analytical Factors Operator technique
Interfering substances/conditions Statistical analysis of control results
10
Quality Control Safety precautions Controls Standards and calibration
External Internal or equivalent Standards and calibration Reportable or linear range Accuracy and precision Random and systematic errors
11
Quality Control Chart
12
Accuracy versus Precision
13
Basic Statistics Mean, variance, and standard deviation
14
Basic Statistics Using the standard deviation
Establish confidence limits Establish reference ranges
15
Normal Distribution Curve
16
Quality Control Charts
Levey-Jennings charts Trend Shift Westgard’s rules
17
Quality Control Charts
18
Coefficient of Variation (CV)
Compares precision of methods CV = s × 100 mean This project was funded at $3,000,000 (100% of its total cost) from a grant awarded under the Trade Adjustment Assistance Community College and Career Training Grants, as implemented by the U.S. Department of Labor’s Employment and Training Administration. Rogue Community College is an equal opportunity employer/program. Auxiliary aids and services, alternate form and language services are available to individuals with disabilities and limited English proficiency free of cost upon request. This work is licensed under a Creative Commons Attribution 4.0 International License.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.