Quality Assurance & Improvement Flashcards

A sleep center wants to reduce patient 'no-show' rates for overnight studies. Which QA approach is MOST systematic?

Answer: Analyze no-show data by day of week, referral source, and insurance type to identify patterns

Stratified data analysis reveals which variables most strongly predict no-shows, allowing targeted interventions rather than blanket workarounds.

Which tool is MOST appropriate for visually displaying the frequency of different categories of PSG technical defects to prioritize QA efforts?

Answer: Pareto chart

A Pareto chart ranks defect categories by frequency, allowing a lab to focus on the 'vital few' problems that account for the majority of quality issues.

What does 'PDSA cycle' stand for in the context of sleep lab quality improvement?

Answer: Plan, Do, Study, Act

The PDSA (Plan-Do-Study-Act) cycle is a structured quality improvement methodology used to test changes on a small scale before full implementation.

A sleep lab tracks its artifact rate over 12 months and finds a sudden spike in Month 8. What is the BEST initial action?

Answer: Investigate what changed in Month 8 (staff, equipment, environment) to identify a cause

Identifying what specifically changed at the time of the spike (special cause variation) is essential before implementing any corrective action.

Which AASM accreditation standard requires sleep labs to track patient satisfaction?

Answer: Quality measures and outcomes

AASM accreditation standards require labs to measure quality outcomes including patient satisfaction as part of their ongoing quality program.

A lab's QA committee reviews a case where a patient's AHI was scored as 4.8 on one reading and 18.2 on a second reading of the same night. What type of error does this MOST likely represent?

Answer: Scoring inconsistency or inter-rater variability

A large discrepancy between two scorings of identical data strongly suggests inconsistent application of scoring rules, which is an inter-rater reliability problem.

Which of the following is an example of a PROCESS measure (rather than an outcome measure) in sleep lab QA?

Answer: Percentage of studies with electrode impedances below 5 kΩ

Electrode impedance compliance is a process measure because it tracks whether the technical process was performed correctly, not the clinical result for the patient.

A technologist notices that EEG electrode impedances are consistently elevated at the F7 and F8 sites for the past three patients. What is the BEST quality improvement action?

Answer: Inspect and clean the electrode application equipment and technique

Recurring high impedance at specific sites suggests a systematic issue with equipment or technique that should be identified and corrected.

Which metric is MOST useful for tracking the percentage of studies that meet AASM minimum technical standards?

Answer: Study adequacy rate

Study adequacy rate directly measures the proportion of studies meeting minimum technical criteria, making it the primary QA metric for technical quality.

During a QA review, a lab finds that 20% of portable (OCST) studies have missing flow signal data. What should be the FIRST corrective step?

Answer: Conduct root-cause analysis to identify why flow signals are failing

Root-cause analysis identifies whether the failure stems from equipment, patient setup, patient behavior, or protocol gaps before implementing a fix.

Which of the following BEST describes the purpose of inter-rater reliability testing in a sleep lab?

Answer: To measure agreement between technologists or scorers on the same study

Inter-rater reliability testing quantifies how consistently different scorers apply AASM scoring rules to the same polysomnographic data.

A sleep lab is implementing a CPAP adherence follow-up protocol. Which QA measure BEST evaluates the protocol's effectiveness?

Answer: Percentage of patients achieving ≥4 hours of nightly CPAP use at 90 days

Measuring the percentage of patients achieving the standard adherence threshold at 90 days directly evaluates whether the follow-up protocol improves patient outcomes.

A new scoring technologist is added to the team. What QA process BEST ensures their scoring meets lab standards?

Answer: Perform calibration scoring on a set of known studies and review discrepancies

Calibration scoring on studies with known agreed-upon results provides objective feedback on whether the new scorer applies rules correctly.

Which statement BEST reflects the role of a physician medical director in sleep lab quality assurance?

Answer: The medical director provides clinical oversight, reviews QA data, and approves corrective action plans

AASM accreditation standards require the medical director to have an active clinical oversight role including reviewing QA metrics and approving improvement plans.

Under AASM standards, how often should a sleep lab's quality improvement program formally review its outcome data?

Answer: At least quarterly

AASM accreditation requires that quality data be reviewed at least quarterly by the QA committee to ensure timely identification and response to problems.

A lab adds a new HSAT device to its fleet. What QA step is MOST important before using the device on patients?

Answer: Perform equipment validation testing against a known standard or concurrent PSG

Validation testing confirms that the new device performs comparably to accepted standards, ensuring clinical validity before it is used for diagnostic purposes.

Which corrective action is MOST appropriate when QA audits reveal that technologists are inconsistently applying AASM arousal scoring rules?

Answer: Conduct targeted scoring calibration sessions using consensus-scored training records

Calibration sessions with consensus-scored records directly address inconsistency by aligning technologist interpretation with the established standard.

A sleep lab is preparing for AASM re-accreditation. Which document is MOST critical to demonstrate an ongoing QA program?

Answer: QA meeting minutes and corrective action logs from the past accreditation cycle

QA meeting minutes and corrective action logs provide documented evidence that the lab has been continuously monitoring quality and responding to identified issues.

What is the primary purpose of conducting a 'sentinel event' review in a sleep lab?

Answer: To perform an in-depth analysis of a serious adverse event and prevent recurrence

Sentinel event review is a root-cause analysis process focused on understanding system failures that led to a serious event and implementing safeguards to prevent it from happening again.

Which statistical concept helps distinguish between 'common cause' and 'special cause' variation in a sleep lab's PSG quality metrics?

Answer: Statistical process control (SPC) charts

SPC control charts use statistically derived control limits to identify whether variation in a metric is random (common cause) or due to a specific identifiable factor (special cause).