Free AACC Quality Assurance Questions and Answers

Question 1

What is the main goal of quality assurance in laboratories?

Accepted Answer

Ensuring reliable results

Answer

The main goal of quality assurance (QA) in laboratories is to ensure the overall reliability, consistency, and integrity of all laboratory processes and results. QA encompasses a comprehensive system of planned and systematic activities, including quality control, personnel training, instrument maintenance, and documentation. Its purpose is to prevent errors and ensure that the laboratory consistently produces high-quality, accurate, and clinically useful results.

Question 2

What is a Levey-Jennings chart used for?

Accepted Answer

Monitoring quality control

Answer

A Levey-Jennings chart is a widely used statistical tool in clinical laboratories for monitoring quality control data over time. It graphically plots daily quality control results against established mean and standard deviation limits. This visual representation allows laboratory personnel to easily detect shifts, trends, or random errors in test performance, indicating potential problems with an analytical system that require investigation.

Question 3

Which term describes acceptable variability in test results?

Accepted Answer

Allowable error

Answer

Allowable error, also known as total allowable error (TAE), defines the maximum acceptable deviation from the true value for a test result that is still considered clinically acceptable. It sets the performance limits for analytical methods, ensuring that any variability in test results does not compromise patient care. Laboratories use allowable error specifications to evaluate the quality of their testing and ensure results are fit for clinical purpose.

Question 4

What is external quality assessment (EQA)?

Accepted Answer

Performance comparison with peers

Answer

External Quality Assessment (EQA), also known as proficiency testing, is a crucial component of a laboratory's quality management system. It involves a laboratory analyzing unknown samples provided by an external organization and comparing its results with those of other participating laboratories. EQA provides an objective, independent assessment of a laboratory's analytical performance, helping to identify systematic errors and ensure the reliability of results compared to peer institutions.

Question 5

What happens if QC results fall outside control limits?

Accepted Answer

Investigate and correct the issue

Answer

If quality control (QC) results fall outside the established control limits, it indicates a potential problem with the analytical system, suggesting that patient results may be inaccurate. In such a scenario, it is imperative to stop testing patient samples, investigate the root cause of the issue (e.g., instrument malfunction, reagent degradation, calibration error), and implement corrective actions. Only after the problem is resolved and QC results are back in control can patient testing resume.

AACC - American Association for Clinical Chemistry Certification Practice Test

AACC - American Association for Clinical Chemistry Certification Practice Test

Free AACC Quality Assurance Questions and Answers