PAP Quality Control and Laboratory Standards 2 — Questions and Answers
Question 1: In liquid-based cytology quality control, which step verifies that the automated imager is correctly identifying cellular regions on the slide?
- Stain batch logging
- Imaging system calibration (Correct answer)
- Patient identifier matching
- Centrifuge speed verification
Correct answer: Imaging system calibration
Imaging system calibration ensures the instrument correctly locates and captures cellular fields for cytotechnologist review.
Question 2: Which document must a cytology laboratory maintain to demonstrate ongoing compliance with CLIA proficiency testing requirements?
- Patient consent forms
- Proficiency testing enrollment and performance records (Correct answer)
- Insurance billing logs
- Colposcopy referral records
Correct answer: Proficiency testing enrollment and performance records
Laboratories must maintain records of proficiency testing enrollment, individual scores, and remedial actions to demonstrate CLIA compliance.
Question 3: What is the purpose of maintaining a cytology case logbook that records the number of cases screened per cytotechnologist daily?
- To bill insurance accurately
- To enforce the CLIA 100-slide workload limit (Correct answer)
- To track vacation days
- To assign cytotechnologist bonuses
Correct answer: To enforce the CLIA 100-slide workload limit
A daily case logbook documents each screener's workload to ensure compliance with the CLIA 100-slide-per-24-hour limit.
Question 4: A cytotechnology student's false-negative rate on a mock proficiency test is 7%. According to most QC benchmarks, this result is:
- Excellent and requires no follow-up
- Within acceptable limits (below 10%) (Correct answer)
- Cause for immediate dismissal from training
- Not relevant until formal CLIA testing
Correct answer: Within acceptable limits (below 10%)
A false-negative rate below 10% is generally considered within acceptable training benchmarks, though programs strive for lower rates.
Question 5: Which action is required when a cytology laboratory's proficiency testing score falls below the passing threshold under CLIA?
- No action; one failure is tolerated
- Immediate suspension of testing and mandatory remedial training (Correct answer)
- Notify the patient directly
- Submit results to the state health department only
Correct answer: Immediate suspension of testing and mandatory remedial training
A failing proficiency test score under CLIA triggers mandatory suspension of the individual from unsupervised testing and requires documented remedial action.
Question 6: Which quality assurance metric measures how often a laboratory diagnoses HSIL on Pap, verified by subsequent CIN 2+ biopsy?
- Sensitivity
- Positive predictive value (Correct answer)
- Specificity
- Negative predictive value
Correct answer: Positive predictive value
Positive predictive value (PPV) measures the proportion of HSIL Pap diagnoses confirmed by histology, reflecting diagnostic accuracy.
Question 7: A laboratory adopts a rapid prescreening protocol where slides are reviewed at a rapid rate before full screening. The primary goal of this protocol is to:
- Replace full cytotechnologist screening
- Identify cases that need priority full review (Correct answer)
- Reduce staining costs
- Speed up automated imaging
Correct answer: Identify cases that need priority full review
Rapid prescreening identifies cases likely to have significant abnormalities for prioritized thorough review, serving as a QC enrichment step.
PAP Quality Control and Laboratory Standards 2
In liquid-based cytology quality control, which step verifies that the automated imager is correctly identifying cellular regions on the slide?