CET Quality Control & Process Improvement 3 — Questions and Answers
Question 1: A fishbone (Ishikawa) diagram is used in echocardiography QI to:
- Track patient outcomes over fiscal quarters
- Identify and categorize potential root causes of a quality problem (Correct answer)
- Display the frequency distribution of measurement values
- Prioritize defects by their frequency of occurrence
Correct answer: Identify and categorize potential root causes of a quality problem
An Ishikawa diagram organizes brainstormed causes of a problem into categories (e.g., people, process, equipment, environment) to facilitate root cause analysis.
Question 2: Which action best demonstrates adherence to ASE guidelines for image documentation in a standard transthoracic echocardiogram?
- Acquiring only the views requested by the ordering physician
- Obtaining a complete set of standardized views including all required measurements (Correct answer)
- Recording only views with the highest image quality
- Limiting acquisition to parasternal views to reduce scan time
Correct answer: Obtaining a complete set of standardized views including all required measurements
ASE guidelines specify a minimum set of required views and measurements to ensure comprehensive, reproducible transthoracic echocardiographic examinations.
Question 3: Inter-observer variability in echocardiographic measurements is BEST reduced by:
- Using only automated measurement software
- Standardizing measurement protocols and providing regular training (Correct answer)
- Assigning all measurements to a single experienced reader
- Reporting only measurements with ICC above 0.95
Correct answer: Standardizing measurement protocols and providing regular training
Standardized protocols with defined measurement techniques and regular training are the most sustainable and scalable approaches to reducing variability across multiple readers.
Question 4: In the context of echocardiography QC, 'accuracy' refers to:
- The reproducibility of measurements across repeated acquisitions
- How closely a measurement reflects the true value (Correct answer)
- The precision of automated software algorithms
- The consistency of measurements between two technicians
Correct answer: How closely a measurement reflects the true value
Accuracy describes the degree to which a measured value agrees with the accepted true or reference value, distinct from precision which reflects reproducibility.
Question 5: A lab's QI team identifies that 80% of incomplete studies result from just 3 of 15 identified causes. Which tool most directly supports this finding?
- Control chart
- Pareto chart (Correct answer)
- Run chart
- FMEA matrix
Correct answer: Pareto chart
A Pareto chart displays causes ranked by frequency, visually demonstrating the 80/20 principle that a few causes account for the majority of problems.
Question 6: When reviewing a peer-reviewed study for potential inclusion in an updated echo lab protocol, which study design provides the highest level of evidence?
- Expert opinion or consensus statement
- Randomized controlled trial or systematic review of RCTs (Correct answer)
- Retrospective cohort study
- Case series from a single institution
Correct answer: Randomized controlled trial or systematic review of RCTs
Randomized controlled trials and systematic reviews of RCTs sit at the top of the evidence hierarchy because they minimize bias through randomization and aggregation.
Question 7: Which element is MOST critical when writing a corrected echocardiography report after discovering a measurement error?
- Deleting the original report from the system entirely
- Clearly labeling the new report as an amendment and documenting the reason for correction (Correct answer)
- Reissuing the report with the corrected value and no notation of change
- Notifying administration but not the ordering physician
Correct answer: Clearly labeling the new report as an amendment and documenting the reason for correction
An amended report must be clearly identified as a correction with documentation of what changed and why, maintaining a complete, transparent medical record.
CET Quality Control & Process Improvement 3
A fishbone (Ishikawa) diagram is used in echocardiography QI to: