RPSGT (Registered Polysomnographic Technologist) Exam — Questions and Answers

Question 1: Adaptive servo-ventilation (ASV) is contraindicated in which specific patient population, based on the findings of the SERVE-HF clinical trial?

Patients with REM-predominant obstructive sleep apnea
Patients with obesity hypoventilation syndrome and hypercapnia
Elderly patients with complex sleep apnea over age 70
Patients with heart failure with reduced ejection fraction (EF < 45%) and predominant central sleep apnea (Correct answer)

Correct answer: Patients with heart failure with reduced ejection fraction (EF < 45%) and predominant central sleep apnea

The SERVE-HF trial (2015) demonstrated significantly increased cardiovascular mortality with ASV in patients with heart failure with reduced ejection fraction (LVEF < 45%) who had predominant central sleep apnea. ASV is therefore contraindicated in this population. This is a critical safety contraindication that all sleep technologists must know.

Question 2: After a difficult night with multiple technical problems, a patient asks the RPSGT if the data collected will still be useful. What is the best response?

Avoid the question and focus on electrode removal
Guarantee that the study was perfect regardless of what happened
Tell the patient the study definitely needs to be repeated
Honestly explain what occurred and inform the patient that the interpreting physician will assess data quality (Correct answer)

Correct answer: Honestly explain what occurred and inform the patient that the interpreting physician will assess data quality

Honest communication that defers clinical judgment to the interpreting physician maintains trust without overpromising.

Question 3: During REM sleep, which of the following is NOT typically observed?

Rapid eye movements
Muscle atonia
Low-voltage mixed-frequency EEG
Sleep spindles (Correct answer)

Correct answer: Sleep spindles

Sleep spindles are a feature of NREM sleep (N2) and do not occur during REM sleep.

Question 4: What is the minimum duration of a sleep spindle required for scoring per AASM rules?

1.0 seconds
0.5 seconds (Correct answer)
0.75 seconds
0.25 seconds

Correct answer: 0.5 seconds

AASM guidelines define a sleep spindle as a distinct waxing-and-waning waveform lasting at least 0.5 seconds, usually 12-14 Hz.

Question 5: What is the minimum number of continuing education credits an RPSGT must earn per recertification cycle?

50 CECs
20 CECs
30 CECs (Correct answer)
10 CECs

Correct answer: 30 CECs

The BRPT requires 30 continuing education credits per 5-year recertification cycle to maintain the RPSGT credential.

Question 6: A patient requests a copy of their polysomnography report to share with a family member. What is the correct action?

Provide the report immediately without documentation
Refuse because sleep records are never shareable
Send the report directly to the family member without patient involvement
Obtain a signed authorization from the patient before releasing records (Correct answer)

Correct answer: Obtain a signed authorization from the patient before releasing records

HIPAA requires a signed authorization from the patient before releasing protected health information to third parties.

Question 7: In a healthy young adult, approximately what percentage of total sleep time is spent in REM sleep?

20–25% (Correct answer)
35–40%
15–20%
5–10%

Correct answer: 20–25%

REM sleep constitutes approximately 20–25% of total sleep time in healthy young adults.

Question 8: What is a dashboard in the context of data reporting?

A software tool exclusively for financial reporting
A physical board in the office for posting announcements
A type of database for storing historical records
A visual display that consolidates key metrics and indicators in real-time (Correct answer)

Correct answer: A visual display that consolidates key metrics and indicators in real-time

A dashboard is a visual interface that consolidates and displays key performance metrics, indicators, and data points, often in real-time, enabling quick assessment of status and performance.

Question 9: What is the primary purpose of using a reference electrode (e.g., M1 or M2) in EEG derivations during PSG?

To monitor electrode impedance continuously
To provide the ground connection for safety purposes
To record eye movement artifacts for subtraction
To serve as the electrically inactive reference point for differential amplification (Correct answer)

Correct answer: To serve as the electrically inactive reference point for differential amplification

Reference electrodes (mastoids) provide a relatively electrically quiet site for differential amplification, allowing the active electrode's signal to dominate the derivation.

Question 10: An EEG arousal during PSG is scored when there is an abrupt EEG frequency shift lasting at least:

3 seconds (Correct answer)
10 seconds
1 second
5 seconds

Correct answer: 3 seconds

AASM defines an EEG arousal as an abrupt shift to alpha, theta, or >16 Hz activity lasting ≥3 seconds, preceded by ≥10 seconds of stable sleep.

Question 11: When should established methodologies be reconsidered?

Never, once established they should remain permanent
Whenever a new employee joins the organization
Only during annual reviews regardless of performance
When evidence shows better alternatives exist or when outcomes decline (Correct answer)

Correct answer: When evidence shows better alternatives exist or when outcomes decline

Established methodologies should be reconsidered when new evidence suggests better alternatives, when outcomes decline, or when the operating context changes significantly.

Question 12: Which feature on PSG distinguishes central sleep apnea from obstructive sleep apnea during an apnea event?

Duration of the apnea exceeding 20 seconds
Oxygen desaturation nadir below 85%
Occurrence exclusively during REM sleep
Absence of respiratory effort on thoracic and abdominal channels during airflow cessation (Correct answer)

Correct answer: Absence of respiratory effort on thoracic and abdominal channels during airflow cessation

Central apneas are scored when both respiratory effort channels (thoracic and abdominal) show absent effort throughout the entire airflow cessation, unlike obstructive events which maintain effort.

Question 13: According to AASM scoring rules, what percentage of an epoch must consist of slow wave activity to score Stage N3?

≥30%
≥10%
≥50%
≥20% (Correct answer)

Correct answer: ≥20%

AASM rules require that ≥20% of the epoch consist of slow wave activity (0.5–2 Hz, >75 µV frontal) to score Stage N3.

Question 14: A colleague asks you to sign off on a patient record they forgot to complete. What should you do?

Refuse and advise the colleague to complete and sign their own documentation (Correct answer)
Report the colleague to the medical board immediately
Sign it since you trust your colleague's work
Complete the missing documentation yourself and sign both names

Correct answer: Refuse and advise the colleague to complete and sign their own documentation

Co-signing or completing records for another technologist is fraudulent documentation and violates professional standards.

Question 15: The diagnostic threshold for obstructive sleep apnea in children differs from adults. What AHI value is considered abnormal in a pediatric patient?

AHI ≥ 10 events/hour
AHI ≥ 15 events/hour
AHI ≥ 5 events/hour
AHI ≥ 1 event/hour (Correct answer)

Correct answer: AHI ≥ 1 event/hour

AASM guidelines define pediatric OSA as an AHI ≥ 1 obstructive event per hour of sleep, compared to the adult threshold of ≥ 5 events/hour. Children normally have very few respiratory events, so even one obstructive apnea or hypopnea per hour is considered clinically significant and requires evaluation.

Question 16: Which of the following actions best demonstrates professional communication between an RPSGT and a sleep medicine physician?

Sending a text message with abbreviations to describe complex findings
Using standardized terminology and AASM scoring criteria when reporting study events (Correct answer)
Verbally summarizing findings without any supporting documentation
Avoiding communication unless the physician initiates it

Correct answer: Using standardized terminology and AASM scoring criteria when reporting study events

Standardized terminology ensures accurate, unambiguous communication between technologists and physicians.

Question 17: A patient's epoch shows continuous alpha activity throughout. No eye movements or muscle artifact are present. What stage is most appropriate?

Stage N2
Stage N1
Stage W (Correct answer)
Stage R

Correct answer: Stage W

Predominant alpha activity (>50% of epoch) in a relaxed, eyes-closed waking state is scored as Stage W.

Question 18: Which sleep disorder is characterized by recurrent episodes of partial or complete upper airway obstruction during sleep?

Central sleep apnea
Sleep-related hypoventilation
Cheyne-Stokes respiration
Obstructive sleep apnea (Correct answer)

Correct answer: Obstructive sleep apnea

Obstructive sleep apnea is defined by recurrent upper airway collapse during sleep, causing apneas and hypopneas despite continued respiratory effort.

Question 19: Which risk response strategy involves reducing the likelihood or impact of a risk?

Risk transfer
Risk acceptance
Risk escalation
Risk mitigation (Correct answer)

Correct answer: Risk mitigation

Risk mitigation involves taking proactive steps to reduce either the probability of a risk occurring or its potential impact if it does occur.

Question 20: What distinguishes a certified professional from a non-certified practitioner?

Demonstrated knowledge through standardized assessment and adherence to professional standards (Correct answer)
A specific educational degree only
Longer years of experience only
Higher salary requirements only

Correct answer: Demonstrated knowledge through standardized assessment and adherence to professional standards

Certification validates that a professional has met established standards of knowledge and competence through standardized assessment.

Question 21: During CPAP titration, a patient continues to have obstructive apneas at 8 cmH₂O. What is the typical next pressure adjustment step?

Increase pressure by 0.5 cmH₂O
Increase pressure by 1 cmH₂O (Correct answer)
Increase pressure by 2 cmH₂O
Switch to BiPAP therapy

Correct answer: Increase pressure by 1 cmH₂O

CPAP titration protocols typically increase pressure in 1 cmH₂O increments when obstructive apneas persist, allowing adequate time to assess response.

Question 22: Recurrent isolated sleep paralysis is classified under which category of sleep disorders?

REM-related parasomnias (Correct answer)
Hypersomnias
NREM parasomnias
Circadian rhythm sleep-wake disorders

Correct answer: REM-related parasomnias

Recurrent isolated sleep paralysis is classified as an REM-related parasomnia because it represents persistence of REM atonia during the transition to or from wakefulness.

Question 23: According to AASM rules, an epoch is scored Stage Wake (W) when alpha activity occupies what proportion of the epoch?

≥20%
≥50% (Correct answer)
≥30%
≥75%

Correct answer: ≥50%

Stage W is scored when alpha activity is present for ≥50% of the epoch in subjects who generate occipital alpha.

Question 24: During a split-night study, what minimum criteria must typically be met before transitioning from the diagnostic to the CPAP titration portion, per AASM guidelines?

At least 4 hours of diagnostic recording with an AHI ≥ 15 events/hour
At least 2 hours of diagnostic recording with an AHI ≥ 40 events/hour (Correct answer)
At least 1 hour of diagnostic recording with any obstructive events
REM sleep must be recorded before transitioning

Correct answer: At least 2 hours of diagnostic recording with an AHI ≥ 40 events/hour

AASM guidelines specify that a split-night study requires at least 2 hours of diagnostic sleep and an AHI ≥ 40 events/hour (or AHI 20-40 with clinical justification such as severe hypoxemia) before proceeding to CPAP titration in the same night.

Question 25: A patient is diagnosed with sleep-related hypoventilation. Which PSG parameter is most directly used to confirm this diagnosis?

End-tidal or transcutaneous CO2 exceeding 55 mmHg for more than 10 minutes (Correct answer)
Apnea-hypopnea index above 15
SpO2 below 88% for more than 5 minutes total
Arousal index above 30 per hour

Correct answer: End-tidal or transcutaneous CO2 exceeding 55 mmHg for more than 10 minutes

Sleep-related hypoventilation is confirmed by CO2 monitoring showing PaCO2 or surrogate (ETCO2/TcCO2) >55 mmHg for ≥10 minutes during sleep.

Question 26: Which statistical concept helps distinguish between 'common cause' and 'special cause' variation in a sleep lab's PSG quality metrics?

Linear regression analysis
Statistical process control (SPC) charts (Correct answer)
Mean absolute deviation
Chi-square testing

Correct 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).

Question 27: During REM sleep, which chin EMG finding is expected on a polysomnogram?

Atonia with occasional phasic twitches (Correct answer)
Moderate activity with phasic bursts
High-amplitude tonic activity
Rhythmic jaw clenching

Correct answer: Atonia with occasional phasic twitches

REM sleep is characterized by chin EMG atonia (the lowest amplitude relative to other stages) with occasional phasic muscle twitches.

Question 28: During biocalibrations, a technologist asks the patient to breathe normally for 30 seconds. What is the primary purpose of this step?

Verify respiratory channel function and waveform morphology (Correct answer)
Calibrate the CPAP pressure gauge
Test patient cooperation for the study
Measure baseline oxygen saturation

Correct answer: Verify respiratory channel function and waveform morphology

Normal breathing during biocalibrations verifies that airflow, thoracic, and abdominal respiratory channels display appropriate waveform morphology and function.

Question 29: A sleep lab's QA program identifies that split-night study conversion criteria are inconsistently applied by different technologists. What is the MOST appropriate corrective document to create?

An equipment maintenance checklist for CPAP titration systems
A new patient consent form specific to split-night studies
A standardized split-night conversion protocol with clear, objective criteria and a decision flowchart (Correct answer)
A revised scoring rule set for split-night studies

Correct answer: A standardized split-night conversion protocol with clear, objective criteria and a decision flowchart

A standardized protocol with objective criteria and a decision flowchart removes ambiguity and ensures all technologists apply the same decision logic for split-night conversion.

Question 30: Which organization administers the RPSGT credential and sets the standards for certification eligibility?

National Board for Respiratory Care (NBRC)
American Board of Sleep Medicine (ABSM)
American Academy of Sleep Medicine (AASM)
Board of Registered Polysomnographic Technologists (BRPT) (Correct answer)

Correct answer: Board of Registered Polysomnographic Technologists (BRPT)

The BRPT is the credentialing body responsible for administering the RPSGT examination and maintaining certification standards.

Question 31: What does SWOT analysis evaluate?

Systems, Workflows, Operations, and Technology
Sales, Workers, Outputs, and Timelines
Strengths, Weaknesses, Opportunities, and Threats (Correct answer)
Standards, Warranties, Objectives, and Targets

Correct answer: Strengths, Weaknesses, Opportunities, and Threats

SWOT analysis is a strategic planning framework that evaluates internal Strengths and Weaknesses and external Opportunities and Threats.

Question 32: A patient with severe COPD and no co-existing OSA shows SpO2 < 88% for more than 30% of total sleep time on nocturnal oximetry. Which treatment is most appropriate?

CPAP titration study to treat presumed obstructive apneas
Positional therapy to reduce supine breathing impairment
Mandibular advancement device to reduce respiratory effort
Nocturnal supplemental oxygen therapy (Correct answer)

Correct answer: Nocturnal supplemental oxygen therapy

In COPD patients without OSA, nocturnal desaturation results from hypoventilation and ventilation-perfusion mismatch rather than airway obstruction. CPAP would not correct this. Supplemental oxygen is the appropriate intervention, and criteria for nocturnal oxygen in COPD include SpO2 < 88% for ≥ 5 minutes during sleep, which this patient clearly meets.

Question 33: What is the primary purpose of the expiratory pressure relief feature (e.g., EPR, C-Flex, or A-Flex) available on some CPAP devices?

To slightly reduce pressure during exhalation to improve patient comfort and adherence (Correct answer)
To increase pressure during inspiration to prevent hypopneas
To deliver bilevel pressure support equivalent to BiPAP therapy
To automatically increase pressure in response to detected apneas

Correct answer: To slightly reduce pressure during exhalation to improve patient comfort and adherence

Expiratory pressure relief reduces the delivered pressure by 1-3 cmH2O during the exhalation phase, easing the effort required to breathe out against CPAP pressure. This comfort feature improves patient tolerance and adherence without fundamentally changing the therapeutic pressure during inhalation.

Question 34: A SWOT analysis for a sleep laboratory revealed that a nearby hospital has opened a competing sleep center. This represents which SWOT component?

Strength
Opportunity
Threat (Correct answer)
Weakness

Correct answer: Threat

External competitive pressures that could negatively impact the organization are classified as threats in a SWOT analysis.

Question 35: What is the primary purpose of data analysis in professional practice?

To justify decisions that have already been made
To transform raw data into actionable insights for decision-making (Correct answer)
To create complex charts for presentations
To fulfill annual reporting requirements only

Correct answer: To transform raw data into actionable insights for decision-making

Data analysis transforms raw data into meaningful insights that inform evidence-based decision-making and strategic planning.

Question 36: A CSR (Cheyne-Stokes respiration) pattern requires a minimum of how many central apneas or hypopneas?

5
4
2
3 (Correct answer)

Correct answer: 3

AASM criteria for CSR require ≥3 consecutive central apneas/hypopneas with a cyclic crescendo-decrescendo pattern.

Question 37: Sawtooth waves are a characteristic EEG feature associated with which sleep stage?

Stage N2
Stage N1
Stage R (REM) (Correct answer)
Stage N3

Correct answer: Stage R (REM)

Sawtooth waves—serrated, sharply contoured 2–6 Hz waves—are a characteristic EEG feature of REM sleep, often preceding bursts of rapid eye movements.

Question 38: How is a sleep cycle most accurately defined in standard PSG scoring?

One NREM period followed by one REM period (Correct answer)
A period from sleep onset to the first arousal
A period from N1 onset to the next Stage Wake
90 minutes of consecutive sleep

Correct answer: One NREM period followed by one REM period

A sleep cycle consists of one NREM period (N1–N2–N3) followed by a REM period, typically repeating every 90–110 minutes.

Question 39: What is the primary purpose of conducting a 'sentinel event' review in a sleep lab?

To satisfy insurance auditors requesting clinical documentation
To perform an in-depth analysis of a serious adverse event and prevent recurrence (Correct answer)
To comply with state licensing renewal requirements
To evaluate technologist performance for annual reviews

Correct 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.

Question 40: What is the minimum recommended sampling rate for EEG signals in digital PSG according to AASM guidelines?

128 Hz
200 Hz
256 Hz (Correct answer)
500 Hz

Correct answer: 256 Hz

AASM recommends a minimum sampling rate of 256 Hz for EEG to adequately represent frequencies up to 35 Hz per Nyquist theorem.

Question 41: When a sleep lab sends PSG data to a third-party scoring service, under HIPAA the scoring service is classified as a:

Covered Entity
Hybrid Entity
Workforce Member
Business Associate (Correct answer)

Correct answer: Business Associate

A third-party vendor that performs services involving PHI on behalf of a covered entity is classified as a Business Associate and must sign a Business Associate Agreement.

Question 42: Which ethical principle is violated when a technologist performs a procedure without explaining it to the patient first?

Autonomy (Correct answer)
Beneficence
Justice
Fidelity

Correct answer: Autonomy

Autonomy requires that patients be informed and have the opportunity to consent before procedures are performed on them.

Question 43: A pediatric patient's parent refuses to allow the child to undergo a recommended sleep study. What should the technologist do?

Contact child protective services immediately
Proceed with the study because it is in the child's best interest
Respect the parent's legal right to refuse and document accordingly (Correct answer)
Sedate the child and proceed without parental consent

Correct answer: Respect the parent's legal right to refuse and document accordingly

Parents are the legal decision-makers for minor children; their refusal must be respected and documented, with the physician notified.

Question 44: When should an epoch be scored Stage N3 rather than N2 even if sleep spindles are present?

When ≥20% of the epoch consists of slow wave activity (Correct answer)
When the patient is having central apneas
When K-complexes are absent from the epoch
When chin EMG atonia is detected

Correct answer: When ≥20% of the epoch consists of slow wave activity

N3 takes precedence over N2 when slow wave activity occupies ≥20% of the epoch, regardless of co-occurring spindles or K-complexes.

Question 45: What distinguishes a mixed apnea from other apnea types?

It is associated with central nervous system pathology exclusively
It has a duration of less than 10 seconds
It begins with absent respiratory effort and ends with resumed but obstructed effort (Correct answer)
It occurs only during REM sleep

Correct answer: It begins with absent respiratory effort and ends with resumed but obstructed effort

A mixed apnea begins with the absent effort of a central apnea and transitions to obstructive respiratory effort before airflow resumes.

Question 46: What is the recommended paper speed (or display sweep) for standard PSG epoch scoring?

25 mm/sec (10-second epochs)
10 mm/sec (30-second epochs) (Correct answer)
15 mm/sec (20-second epochs)
5 mm/sec (30-second epochs)

Correct answer: 10 mm/sec (30-second epochs)

The standard PSG display speed is 10 mm/sec, yielding 30-second epochs as recommended by AASM.

Question 47: Which statement about documenting periodic limb movements (PLMs) is correct per AASM rules?

PLMs are only scored during REM sleep
PLMs require associated arousals to be counted
Any limb movement longer than 2 seconds qualifies as a PLM series
PLMs are scored in series of ≥4 consecutive movements with inter-movement intervals of 5–90 seconds (Correct answer)

Correct answer: PLMs are scored in series of ≥4 consecutive movements with inter-movement intervals of 5–90 seconds

A PLM series requires ≥4 movements, each lasting 0.5–10 seconds, separated by intervals of 5–90 seconds, and can occur in any sleep stage.

Question 48: In the standard PSG setup, leg EMG electrodes are placed on the anterior tibialis muscles of both legs. What minimum inter-electrode distance is recommended to ensure proper recording?

1-2 cm apart on the same muscle belly
Electrodes placed on different legs are always referenced to each other
5-7 cm apart, one on each side of the knee
2-3 cm apart on the anterior tibialis, one-third of the way down the lower leg (Correct answer)

Correct answer: 2-3 cm apart on the anterior tibialis, one-third of the way down the lower leg

AASM recommends placing leg EMG electrodes 2-3 cm apart longitudinally on the belly of the anterior tibialis muscle, approximately one-third of the way down from the knee. This placement optimally captures tibialis muscle bursts associated with periodic limb movements, while minimizing cross-talk from adjacent muscles.

Question 49: A 30-second epoch shows predominantly Stage N2 features, but a cortical arousal lasting 5 seconds is present in the middle. How should this epoch be scored?

Score as N2 — the stage occupying the majority of the epoch (Correct answer)
Split into two 15-second half-epochs
Score as Wake
Score as N1 due to the arousal

Correct answer: Score as N2 — the stage occupying the majority of the epoch

Per AASM rules, an epoch is scored by the stage that predominates; a brief arousal does not reclassify the entire epoch unless Wake occupies >50%.

Question 50: If a patient reports taking a sleep medication not listed on intake paperwork, the technician must:

Cancel the study
Add it to the study documentation and notify the interpreting physician (Correct answer)
Ignore it since the study has already started
Document it only in the billing record

Correct answer: Add it to the study documentation and notify the interpreting physician

Undisclosed medications can alter sleep architecture and must be added to the record and brought to the interpreting physician's attention.

Question 51: Which of the following scenarios represents a HIPAA breach?

Documenting care in a secured electronic health record
Emailing unencrypted patient records to an unauthorized third party (Correct answer)
Accessing a patient's chart when assigned to their care
Discussing a patient's care with a consulting physician treating that patient

Correct answer: Emailing unencrypted patient records to an unauthorized third party

Sending unencrypted PHI to an unauthorized recipient is a HIPAA breach regardless of intent.

Question 52: If N2 features appear early in an epoch and are followed by an arousal that does not reach Wake criteria, how is the epoch scored?

Score the first half N2 and the second half N1
Score as N2 because N2 features were present (Correct answer)
Score as Wake because of the arousal
Score as N1 because the arousal disrupted N2

Correct answer: Score as N2 because N2 features were present

AASM rules state that if N2-qualifying features appear in any part of the epoch and are followed by an arousal not reaching Wake criteria, the whole epoch is scored N2.

Question 53: A sleep center is experiencing high rates of near-miss incidents. Which safety culture concept should the leadership team prioritize implementing?

Increased surveillance of individual staff performance
Blame-free (just culture) reporting environment (Correct answer)
Anonymous disciplinary actions for all errors
Restricting access to incident report forms

Correct answer: Blame-free (just culture) reporting environment

A just culture encourages transparent near-miss reporting without blame, enabling the organization to identify and correct systemic risks before harm occurs.

Question 54: In subjects who do not generate occipital alpha activity, which criterion is used to distinguish Stage Wake from Stage N1?

Presence of irregular conjugate eye movements and/or eye blinks (Correct answer)
Eye blink rate exceeding 3 per minute
Presence of sleep spindles
Chin EMG amplitude exceeding a set threshold

Correct answer: Presence of irregular conjugate eye movements and/or eye blinks

In non-alpha generators, Stage W is scored by the presence of eye blinks, reading eye movements, or irregular conjugate eye movements with normal or high-amplitude mixed-frequency EEG.

Question 55: What is active listening in a professional context?

Agreeing with everything the speaker says
Simply waiting for your turn to speak
Taking verbatim notes of everything said
Fully concentrating, understanding, responding, and remembering what is being said (Correct answer)

Correct answer: Fully concentrating, understanding, responding, and remembering what is being said

Active listening involves fully concentrating on the speaker, understanding the message, providing appropriate responses, and retaining the information communicated.

Question 56: A patient on CPAP therapy reports significant aerophagia (air swallowing and bloating). Which intervention is most appropriate?

Switch from nasal mask to a full-face mask
Reduce CPAP pressure or switch to BiPAP to lower mean airway pressure (Correct answer)
Increase CPAP pressure to reduce air leaks
Add supplemental oxygen to the circuit

Correct answer: Reduce CPAP pressure or switch to BiPAP to lower mean airway pressure

Aerophagia occurs when pressurized air is inadvertently swallowed rather than entering the airway. Reducing pressure or switching to BiPAP (which has a lower mean pressure due to the lower EPAP) decreases the amount of air forced into the esophagus, alleviating the symptom.

Question 57: What is the importance of data validation in reporting?

It makes reports look more professional
It ensures accuracy and reliability of the information used for decisions (Correct answer)
It slows down the reporting process unnecessarily
It is only important for financial data

Correct answer: It ensures accuracy and reliability of the information used for decisions

Data validation ensures that the information used in reports and analysis is accurate, complete, and reliable, which is essential for sound decision-making.

Question 58: Periodic breathing in a pediatric PSG is considered clinically significant when it accounts for more than what percentage of total sleep time?

10%
1%
5% (Correct answer)
3%

Correct answer: 5%

AASM pediatric scoring defines periodic breathing as ≥3 sequences of central apnea lasting >3 seconds each, separated by ≤20 seconds of normal breathing. It becomes clinically significant when it occupies more than 5% of total sleep time, at which point it is associated with pathological central respiratory control instability.

Question 59: Which surgical procedure for OSA works by repositioning both the maxilla and mandible anteriorly, creating the largest documented surgical increase in pharyngeal airway volume?

Maxillomandibular advancement (MMA) (Correct answer)
Uvulopalatopharyngoplasty (UPPP)
Radiofrequency tongue base reduction
Hyoid suspension

Correct answer: Maxillomandibular advancement (MMA)

Maxillomandibular advancement (MMA) surgically moves both jaws forward, expanding the entire upper airway from the retropalatal to the retroglossal level. It has the highest reported surgical success rate for OSA (approximately 86-90%) and produces the greatest increase in pharyngeal volume of any surgical option, but is more invasive than soft tissue procedures.

Question 60: What is the maximum acceptable electrode impedance for EEG channels in polysomnography according to AASM guidelines?

5 kΩ (Correct answer)
25 kΩ
10 kΩ
1 kΩ

Correct answer: 5 kΩ

AASM guidelines specify that EEG electrode impedance should be ≤5 kΩ to ensure adequate signal quality.

Question 61: The Respiratory Disturbance Index (RDI) differs from the AHI in documentation by including:

Hypopneas and SpO2 drops only
Apneas and central events only
Apneas and arousals unrelated to breathing
Apneas, hypopneas, AND respiratory effort-related arousals (RERAs) (Correct answer)

Correct answer: Apneas, hypopneas, AND respiratory effort-related arousals (RERAs)

RDI = (apneas + hypopneas + RERAs) ÷ total sleep time in hours, making it a broader measure of respiratory disturbance than AHI alone.

Question 62: Which element is required in a MSLT (Multiple Sleep Latency Test) documentation that is NOT required in a standard overnight PSG report?

SpO2 monitoring results
Electrode placement diagram
Patient's primary complaint
Nap trial start/end times and whether REM sleep occurred in each nap (Correct answer)

Correct answer: Nap trial start/end times and whether REM sleep occurred in each nap

MSLT reports must document the exact start and end of each nap opportunity and presence or absence of sleep-onset REM periods (SOREMPs) per nap.

Question 63: What distinguishes quality assurance from quality control?

QA is proactive and process-focused; QC is reactive and product-focused (Correct answer)
QA is performed by managers; QC is performed by workers
QA is more expensive; QC is free
There is no practical difference between them

Correct answer: QA is proactive and process-focused; QC is reactive and product-focused

Quality assurance is a proactive approach focused on preventing defects through process improvement, while quality control is reactive, focused on identifying defects in products.

Question 64: Mandibular advancement devices (MADs) treat obstructive sleep apnea through which primary mechanism?

Applying negative pressure to the oropharynx to prevent collapse
Delivering positive pressure to pneumatically splint the upper airway open
Repositioning the mandible and tongue anteriorly to increase retropalatal and retroglossal airway dimensions (Correct answer)
Stimulating hypoglossal nerve activity to stiffen the tongue

Correct answer: Repositioning the mandible and tongue anteriorly to increase retropalatal and retroglossal airway dimensions

MADs hold the lower jaw (mandible) in a forward position during sleep, which secondarily advances the tongue base and tenses the pharyngeal walls, increasing the cross-sectional area of the upper airway. They are a guideline-recommended alternative to CPAP, particularly for patients with mild-to-moderate OSA or those intolerant of PAP.

Question 65: During CPAP titration, persistent flow limitation without discrete apneas or hypopneas is best addressed by:

Adding supplemental oxygen at 2 L/min
Decreasing pressure by 1 cmH₂O
Switching to a chinstrap
Increasing pressure in 1 cmH₂O increments (Correct answer)

Correct answer: Increasing pressure in 1 cmH₂O increments

Flow limitation (flattened inspiratory flow curve) indicates partial upper airway obstruction; increasing CPAP pressure in 1 cmH₂O steps reduces airway resistance.

Question 66: What is the inter-scorer reliability statistic most commonly used to evaluate PSG staging agreement?

Cohen's kappa (Correct answer)
Spearman rho
Pearson correlation coefficient
Intraclass correlation coefficient

Correct answer: Cohen's kappa

Cohen's kappa is the standard statistic for measuring inter-rater agreement on categorical sleep stage scores.

Question 67: The international 10-20 electrode placement system gets its name from what?

The 10 and 20 microamp calibration signals used
The 10% and 20% intervals measured between skull landmarks (Correct answer)
The 10 primary and 20 secondary electrode positions
The year it was established (1920) and updated (1960)

Correct answer: The 10% and 20% intervals measured between skull landmarks

Electrode positions are placed at 10% and 20% intervals between four skull landmarks (nasion, inion, and preauricular points).

Question 68: When disposing of paper records containing PSG data, a sleep lab must ensure:

PHI is rendered unreadable through shredding, burning, or pulping (Correct answer)
Records are placed in standard recycling bins after 7 years
Records are deleted digitally but paper copies may be discarded normally
Only records older than 10 years need secure disposal

Correct answer: PHI is rendered unreadable through shredding, burning, or pulping

HIPAA requires that PHI in paper form be rendered unreadable and unrecoverable before disposal, typically through shredding, burning, or pulping.

Question 69: Which scoring rule applies when both an arousal and a respiratory event end at the same epoch boundary?

Score both the respiratory event and the arousal separately (Correct answer)
Discard the epoch from analysis
Score only the respiratory event and omit the arousal
Score only the arousal and omit the respiratory event

Correct answer: Score both the respiratory event and the arousal separately

AASM rules allow respiratory events and arousals to be scored independently even when they share a time boundary, so both must be documented.

Question 70: When developing a strategic plan for expanding sleep center services, which element should be defined FIRST?

Budget allocation for new equipment
Staffing recruitment advertisements
Mission, vision, and core organizational values (Correct answer)
Marketing campaign design

Correct answer: Mission, vision, and core organizational values

Mission, vision, and values provide the foundational framework that guides all subsequent strategic decisions.

Question 71: During REM scoring, chin EMG tone must be:

At least as high as the highest NREM EMG
Absent entirely with no muscle twitches
At its lowest level of the night or lower than NREM baseline (Correct answer)
Higher than Stage N2 baseline

Correct answer: At its lowest level of the night or lower than NREM baseline

REM sleep requires chin EMG to be at its lowest level of the night, typically lower than any NREM stage, reflecting muscle atonia.

Question 72: What is the typical duration of a sleep spindle?

0.5–3 seconds (Correct answer)
10–20 seconds
5–10 seconds
0.1–0.3 seconds

Correct answer: 0.5–3 seconds

Sleep spindles last 0.5–3 seconds and appear as waxing-and-waning oscillations at 11–16 Hz.

Question 73: A sleep technologist witnesses a patient have a generalized tonic-clonic seizure during a study. After calling for help, which action is the NEXT priority?

Apply a bite block between the patient's teeth
Restrain the patient's limbs to prevent injury
Position the patient on their side to protect the airway (Correct answer)
Increase the paper speed on the EEG to capture the event

Correct answer: Position the patient on their side to protect the airway

Positioning the patient laterally (recovery position) protects the airway from aspiration and is the primary safety intervention during a seizure.

Question 74: Sleep spindles are generated primarily by thalamo-cortical circuits and are typically recorded at maximum amplitude over which scalp region?

Frontal (Fp1, Fp2)
Central (C3, C4) (Correct answer)
Occipital (O1, O2)
Temporal (T3, T4)

Correct answer: Central (C3, C4)

Sleep spindles are maximal over central scalp regions because of their thalamocortical origin projecting to sensorimotor cortex.

Question 75: What distinguishes Stage N1 from Stage Wake in a subject who generates occipital alpha rhythm?

Absence of chin EMG activity
Alpha activity present for <50% of the epoch (Correct answer)
Presence of sleep spindles
Presence of K-complexes

Correct answer: Alpha activity present for <50% of the epoch

N1 is scored when alpha activity occupies <50% of the epoch, replaced by low-amplitude mixed-frequency activity.

Question 76: What role do key performance indicators play in strategic implementation?

They are used only for employee salary decisions
They are optional reporting tools with no strategic value
They provide measurable benchmarks to track progress toward strategic objectives (Correct answer)
They replace the need for strategic planning entirely

Correct answer: They provide measurable benchmarks to track progress toward strategic objectives

KPIs serve as measurable benchmarks that enable organizations to track progress toward strategic objectives and make data-driven adjustments to implementation plans.

Question 77: What is the first step in the risk management process?

Risk avoidance — canceling all activities
Risk identification — recognizing potential threats and vulnerabilities (Correct answer)
Risk transfer — purchasing insurance immediately
Risk acceptance — deciding to live with all risks

Correct answer: Risk identification — recognizing potential threats and vulnerabilities

Risk identification is the critical first step in risk management, involving systematic recognition and documentation of potential threats and vulnerabilities.

Question 78: Positive occipital sharp transients of sleep (POSTS) are normal EEG variants that occur during which stages?

N1 and N2 sleep (Correct answer)
Wakefulness with eyes closed
N3 sleep
REM sleep

Correct answer: N1 and N2 sleep

POSTS are triangular, surface-positive sharp waves at occipital electrodes that are benign normal variants occurring during N1 and N2 NREM sleep.

Question 79: Which pre-study procedure verifies that all EEG channels are functioning correctly by having the patient perform standardized tasks?

DC offset calibration
Impedance check
Signal gain calibration
Biocalibration (Correct answer)

Correct answer: Biocalibration

Biocalibration has the patient perform tasks such as eyes open/closed, deep breathing, teeth clenching, and looking in each direction to verify proper signal detection across all channels.

Question 80: A polysomnography department head is conducting annual performance reviews. Which approach best supports employee development?

Conduct all reviews in a group setting to save time
Use a balanced approach that acknowledges strengths and identifies specific, measurable development goals (Correct answer)
Compare each employee's performance directly to peers in the review
Focus exclusively on areas of weakness to motivate improvement

Correct answer: Use a balanced approach that acknowledges strengths and identifies specific, measurable development goals

Balanced feedback that recognizes strengths alongside specific, actionable goals promotes growth without damaging motivation.

Question 81: Which tool is MOST appropriate for visually displaying the frequency of different categories of PSG technical defects to prioritize QA efforts?

Fishbone diagram
Run chart
Control chart
Pareto chart (Correct answer)

Correct 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.

Question 82: A patient becomes increasingly agitated and attempts to remove electrodes during a PSG. What is the FIRST action a technologist should take?

Terminate the study and discharge the patient
Increase room temperature to improve patient comfort
Enter the patient room, calmly reorient the patient, and assess for safety (Correct answer)
Administer a sedative per protocol

Correct answer: Enter the patient room, calmly reorient the patient, and assess for safety

The first action is to enter the room, reorient the patient, and assess the situation for safety—standard patient care before any intervention.

Question 83: The False Claims Act (FCA) is relevant to sleep centers because it prohibits:

Falsely advertising sleep study outcomes to patients
Submitting fraudulent claims for payment to federal healthcare programs like Medicare (Correct answer)
Failing to disclose adverse events to the FDA
Misrepresenting a technologist's credentials to state boards

Correct answer: Submitting fraudulent claims for payment to federal healthcare programs like Medicare

The False Claims Act imposes liability on entities that knowingly submit false or fraudulent claims for payment to federal programs such as Medicare and Medicaid.

Question 84: Which sleep architecture change is most commonly reported in patients with severe OSA?

Decreased sleep onset latency
Increased REM latency and suppressed REM percentage (Correct answer)
Increased sleep spindle density
Increased Stage N3 percentage

Correct answer: Increased REM latency and suppressed REM percentage

Severe OSA typically fragments sleep and suppresses REM sleep, resulting in prolonged REM latency and reduced REM percentage.

Question 85: Which of the following best describes the RPSGT's role when communicating sleep study results to a patient?

Share raw data printouts and explain each waveform in detail
Decline to answer any questions the patient has about the study
Inform the patient that results will be reviewed and communicated by the ordering physician (Correct answer)
Provide a full diagnosis and treatment recommendations

Correct answer: Inform the patient that results will be reviewed and communicated by the ordering physician

RPSGTs are not licensed to diagnose; results must be communicated to patients by the interpreting physician.

Question 86: Which electrode placement is used for the left eye's recording derivation (E1) in standard AASM PSG montages?

1 cm below and 1 cm lateral to the outer canthus of the left eye (Correct answer)
Directly on the outer canthus of the left eye
1 cm medial to the inner canthus of the left eye
1 cm above and 1 cm lateral to the outer canthus of the left eye

Correct answer: 1 cm below and 1 cm lateral to the outer canthus of the left eye

AASM recommends E1 placement 1 cm below and 1 cm lateral to the left outer canthus to capture both horizontal and vertical eye movements.

Question 87: During a CPAP titration, the patient reports that the mask pressure feels uncomfortable. What is the RPSGT's best course of action?

Ignore the complaint and continue titrating
Tell the patient to tolerate the discomfort because the study must be completed
Immediately end the titration and wake the attending physician
Assess the fit, try alternative mask styles, and document adjustments made (Correct answer)

Correct answer: Assess the fit, try alternative mask styles, and document adjustments made

Optimizing mask comfort improves adherence and study validity; adjustments should be tried and documented.

Question 88: An RPSGT is offered a job at a competing sleep lab and knows proprietary scoring protocols used at their current employer. They should:

Share the protocols with the new employer since they memorized them
Use the protocols freely since they are based on published AASM standards
Copy all protocol documents before resigning to have reference material
Refrain from sharing confidential proprietary information that belongs to their current employer (Correct answer)

Correct answer: Refrain from sharing confidential proprietary information that belongs to their current employer

Confidential proprietary information belongs to the employer; sharing or taking it constitutes a breach of professional ethics and may violate employment agreements.

Question 89: During a pediatric sleep study, a 5-year-old patient becomes increasingly agitated and tries to remove all electrodes. What is the BEST initial approach to manage this risk?

Administer a sedative to calm the child
Pause the study, allow a parent to comfort the child, and attempt to re-engage the child calmly (Correct answer)
Apply soft restraints to prevent electrode removal
Terminate the study and reschedule

Correct answer: Pause the study, allow a parent to comfort the child, and attempt to re-engage the child calmly

The least restrictive intervention first — involving the parent and de-escalating — is both ethically appropriate and clinically sound before considering any other options.

Question 90: A sleep lab is evaluating a new brand of electrode gel. What risk management step should occur BEFORE using the new gel on patients?

Verify the product is FDA-cleared or approved for its intended use and review its safety data sheet (SDS) (Correct answer)
Use it on a few patients first to see if any reactions occur
Only check the gel's conductivity properties
Switch immediately because it is cheaper

Correct answer: Verify the product is FDA-cleared or approved for its intended use and review its safety data sheet (SDS)

All products applied to patients must be FDA-cleared for their intended use, and their SDS reviewed for allergen or hazard information before clinical use.

Question 91: What is the typical frequency range for sleep spindles used when scoring Stage N2?

11–16 Hz (Correct answer)
18–25 Hz
4–7 Hz
8–10 Hz

Correct answer: 11–16 Hz

Sleep spindles are defined as 11–16 Hz (typically 12–14 Hz) waxing-and-waning activity lasting ≥0.5 seconds.

Question 92: What is the role of documentation in regulatory compliance?

It provides verifiable evidence that standards are being met (Correct answer)
It serves no practical purpose beyond record-keeping
It is optional if verbal confirmation is available
It is only necessary for international operations

Correct answer: It provides verifiable evidence that standards are being met

Documentation provides verifiable evidence that regulatory requirements are being met and creates an audit trail for compliance verification.

Question 93: The principle of 'non-maleficence' obligates an RPSGT to:

Maximize patient comfort at all times regardless of clinical needs
Always recommend the most expensive treatment option
Provide equal resources to all patients regardless of diagnosis
Avoid causing harm to patients through actions or omissions (Correct answer)

Correct answer: Avoid causing harm to patients through actions or omissions

Non-maleficence is the ethical duty to avoid inflicting harm on patients, whether through action, negligence, or error.

Question 94: Which metric is MOST useful for tracking the percentage of studies that meet AASM minimum technical standards?

Study adequacy rate (Correct answer)
Average technologist hours per study
Equipment downtime percentage
Average lights-off time

Correct 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.

Question 95: A sleep lab manager observes that staff morale has declined after a major policy change. According to Maslow's hierarchy of needs, which level is most likely affected?

Safety and security needs
Physiological needs
Social/belonging needs
Esteem needs (Correct answer)

Correct answer: Esteem needs

Policy changes that affect recognition, autonomy, or respect typically threaten employees' esteem needs, impacting morale and motivation.

Question 96: When scoring an ambiguous epoch between N1 and N2 where a K-complex appears within the first 3 seconds, what is the correct approach per AASM rules?

Score the entire epoch as N2 (Correct answer)
Score the entire epoch as N1
Score as Stage W
Split the epoch at the K-complex boundary

Correct answer: Score the entire epoch as N2

A K-complex in any portion of an epoch (without arousal) qualifies the epoch to be scored N2, even if it appears at the very start.

Question 97: During a PAP titration study, at what SpO2 level is supplemental oxygen typically added when oxygen saturation remains persistently low despite adequate PAP therapy?

SpO2 < 88% (Correct answer)
SpO2 < 85%
SpO2 < 95%
SpO2 < 92%

Correct answer: SpO2 < 88%

AASM titration guidelines recommend considering supplemental oxygen addition when SpO2 remains below 88% for more than 5 minutes despite optimized PAP pressure. This threshold aligns with CMS criteria for long-term oxygen therapy and reflects the point at which the hemoglobin-oxygen dissociation curve enters its steep portion.

Question 98: During a CPAP titration study, a patient continues to have obstructive apneas at 10 cmH2O. What is the recommended next step according to AASM titration guidelines?

Immediately switch the patient to BiPAP
Terminate the study and refer for surgical evaluation
Increase the CPAP pressure by 1-2 cmH2O and observe response (Correct answer)
Apply supplemental oxygen at 2 L/min

Correct answer: Increase the CPAP pressure by 1-2 cmH2O and observe response

AASM guidelines recommend incremental pressure increases (1-2 cmH2O) during titration, waiting at least 5 minutes between adjustments to allow stabilization before escalating further. Switching to BiPAP or other interventions is premature without first optimizing CPAP pressure.

Question 99: During REM sleep, which finding would prompt a technologist to flag for possible REM sleep behavior disorder?

Alpha rhythm intrusion
Increased delta power
Sustained chin EMG elevation throughout REM epochs (Correct answer)
Absence of sleep spindles

Correct answer: Sustained chin EMG elevation throughout REM epochs

RBD is characterized by loss of normal REM atonia — sustained or repeated chin EMG elevation during REM epochs is the key PSG marker.

Question 100: During REM sleep, which EEG pattern is characteristically observed?

Mixed-frequency, low-amplitude activity (Correct answer)
Sleep spindles and K-complexes
High-amplitude delta waves
Alpha waves at 8-13 Hz

Correct answer: Mixed-frequency, low-amplitude activity

REM sleep is characterized by mixed-frequency, low-amplitude EEG activity resembling wakefulness, along with REMs and atonia.

Question 101: During a study, a patient becomes agitated and physically threatens the technologist. The first priority should be:

Ensuring safety for both the patient and staff, then following facility protocol (Correct answer)
Completing the study regardless of patient behavior
Immediately discharging the patient without documentation
Physically restraining the patient to protect equipment

Correct answer: Ensuring safety for both the patient and staff, then following facility protocol

Safety of both patients and staff is always the top priority; technologists should follow facility emergency and de-escalation protocols.

Question 102: A 35-year-old shift worker complains of inability to sleep at the right times and excessive sleepiness at work. Actigraphy over 14 days shows normal total sleep time but misaligned timing. What is the most likely diagnosis?

Shift work sleep disorder (Correct answer)
Non-24-hour sleep-wake rhythm disorder
Advanced sleep-wake phase disorder
Psychophysiological insomnia

Correct answer: Shift work sleep disorder

Shift work sleep disorder is characterized by insomnia and/or excessive sleepiness caused by a work schedule that overlaps with the usual sleep period.

Question 103: What artifact in PSG is most commonly caused by 60 Hz electrical interference from nearby equipment?

Movement artifact
Sweat artifact
60 Hz (AC) artifact (Correct answer)
Electrode pop artifact

Correct answer: 60 Hz (AC) artifact

60 Hz AC artifact appears as a regular, high-frequency hum on the tracing caused by alternating current electrical interference.

Question 104: A lead technologist identifies that one team member consistently performs exceptionally well and has mastered all current tasks. Which motivational strategy is most appropriate?

Assign the same routine tasks to reinforce mastery
Transfer them to avoid disrupting team dynamics
Reduce their workload to prevent burnout
Provide stretch assignments or mentorship responsibilities to maintain engagement (Correct answer)

Correct answer: Provide stretch assignments or mentorship responsibilities to maintain engagement

High performers remain engaged when given growth opportunities such as stretch projects or mentoring roles that challenge their abilities.

Question 105: A patient's PAP device data shows a residual AHI of 15 events/hr despite a fixed CPAP pressure of 12 cmH2O. The waveform pattern shows clustered events. This pattern is MOST consistent with:

Persistent obstructive apneas requiring higher pressure
Treatment-emergent central sleep apnea (Correct answer)
CPAP pressure set too high causing aerophagia
Mask leak artifact falsely inflating the AHI

Correct answer: Treatment-emergent central sleep apnea

Clustered central events emerging after initiation of CPAP therapy for OSA is the hallmark of treatment-emergent (complex) central sleep apnea.

Question 106: What is the primary goal of quality assurance in professional practice?

To reduce costs by eliminating all testing
To increase production speed regardless of outcomes
To ensure consistent delivery of products or services that meet established standards (Correct answer)
To satisfy regulatory requirements with minimum effort

Correct answer: To ensure consistent delivery of products or services that meet established standards

Quality assurance focuses on ensuring that products, services, and processes consistently meet or exceed established standards and stakeholder expectations.

Question 107: A sleep center's strategic plan states it will increase pediatric PSG volume by 20% in one year. This goal is BEST evaluated using:

Referring physician anecdotal feedback
Annual financial statements only
Monthly tracked PSG volume data segmented by patient age group (Correct answer)
Subjective staff satisfaction ratings

Correct answer: Monthly tracked PSG volume data segmented by patient age group

Tracking monthly volume data segmented by age group provides the objective, ongoing measurement needed to assess progress toward the specific 20% growth target.

Question 108: Vertex sharp waves (V waves) in a sleep study are most characteristic of which sleep stage?

N1 sleep (Correct answer)
REM sleep
N2 sleep
N3 sleep

Correct answer: N1 sleep

Vertex sharp waves are electropositive transients maximal at the vertex and are a hallmark of N1 sleep.

Question 109: Electrode pop artifact in PSG EEG is caused by:

Patient movement during sleep
60 Hz electrical interference from equipment
ECG signal contaminating the EEG channel
Sudden change in electrode impedance (Correct answer)

Correct answer: Sudden change in electrode impedance

Electrode pop artifact appears as sharp transient deflections caused by sudden changes in electrode-skin impedance, typically from loose, dried, or poorly applied electrodes.

Question 110: Why is maintaining confidentiality important in record keeping?

To make file storage easier to manage
Only because it is a legal requirement
To protect sensitive personal and professional information from unauthorized access (Correct answer)
To reduce the number of people who need training

Correct answer: To protect sensitive personal and professional information from unauthorized access

Maintaining confidentiality in record keeping protects sensitive personal, medical, financial, and professional information from unauthorized access, maintaining trust and legal compliance.

Question 111: According to AASM guidelines, which combination of features is required to score an epoch as Stage REM?

Slow wave activity + sawtooth waves + low chin EMG
Low-amplitude mixed-frequency EEG + rapid eye movements + low chin EMG (Correct answer)
Sleep spindles + rapid eye movements + low chin EMG
Alpha EEG + rapid eye movements + high chin EMG

Correct answer: Low-amplitude mixed-frequency EEG + rapid eye movements + low chin EMG

REM requires low-amplitude mixed-frequency EEG, the presence of rapid eye movements (or low chin EMG in tonic REM), and atonic chin EMG.

Question 112: If an RPSGT suspects a patient is suicidal based on statements made during the night study, the appropriate action is:

Reassure the patient and continue the study without escalation
Contact the patient's family without notifying clinical staff
Document the comment and review it at the next shift change
Alert the supervising clinician immediately and follow facility crisis protocol (Correct answer)

Correct answer: Alert the supervising clinician immediately and follow facility crisis protocol

Suicidal ideation is a psychiatric emergency that requires immediate escalation to clinical staff and activation of the facility's crisis protocol.

Question 113: Positional obstructive sleep apnea is defined by AASM as an AHI that is at least how much higher in the supine position compared to non-supine sleep?

10% higher in the supine position
Any documented difference qualifies as positional OSA
50% higher in the supine position
At least twice as high (≥2×) in the supine versus non-supine position (Correct answer)

Correct answer: At least twice as high (≥2×) in the supine versus non-supine position

Positional OSA is defined as a supine AHI that is at least twice the non-supine AHI, with the non-supine AHI being ≤ 5 events/hour (some definitions require non-supine AHI < 5 to be truly positional). Patients with positional OSA may respond to positional therapy (devices that prevent supine sleep) as a primary or adjunct treatment.

Question 114: When scoring respiratory effort-related arousals (RERAs), documentation must include:

An apnea of at least 20 seconds duration
Two consecutive hypopneas
Any arousal following a 3% SpO2 drop
A sequence of breaths with increasing effort lasting ≥10 seconds leading to an arousal (Correct answer)

Correct answer: A sequence of breaths with increasing effort lasting ≥10 seconds leading to an arousal

A RERA requires a ≥10-second sequence of increasing respiratory effort culminating in arousal without meeting apnea or hypopnea criteria.

Question 115: Which of the following is the most significant fall risk factor specific to the sleep laboratory environment?

High ambient temperature in the sleep room
Patient age under 30
Darkened room with multiple electrode wires attached to the patient (Correct answer)
Use of a standard hospital bed

Correct answer: Darkened room with multiple electrode wires attached to the patient

The combination of low lighting for sleep and tethering wires from electrodes creates a unique tripping and falling hazard in the sleep lab environment.

Question 116: Which of the following is an example of therapeutic communication during a sleep study?

'Most patients fall asleep quickly, so you should too.'
'You need to stop moving or your data will be ruined.'
'I understand that the equipment feels uncomfortable; let's see what we can adjust.' (Correct answer)
'The physician will be disappointed if you don't cooperate.'

Correct answer: 'I understand that the equipment feels uncomfortable; let's see what we can adjust.'

Therapeutic communication acknowledges the patient's experience and offers collaborative problem-solving.

Question 117: Stage N1 sleep is typically defined by which EEG frequency replacing alpha?

Beta activity (>13 Hz)
Sigma activity (12-14 Hz)
Delta activity (0.5-2 Hz)
Theta activity (4-7 Hz) (Correct answer)

Correct answer: Theta activity (4-7 Hz)

In N1, alpha is replaced by mixed-frequency low-amplitude activity with predominant theta (4-7 Hz) waveforms.

Question 118: A sleep center director notices that patient no-show rates have increased to 25% over the past quarter. Which strategic intervention is MOST appropriate as a first step?

Immediately hire additional administrative staff
Reduce the scheduling lead time without investigation
Conduct a root-cause analysis to identify contributing factors (Correct answer)
Offer financial incentives to all patients who attend

Correct answer: Conduct a root-cause analysis to identify contributing factors

A root-cause analysis identifies underlying reasons for no-shows before implementing targeted interventions.

Question 119: Vertex sharp waves are most characteristic of which sleep stage?

N3
N1 (Correct answer)
N2
REM

Correct answer: N1

Vertex sharp waves — high-amplitude sharp transients maximal at the vertex — are a hallmark EEG feature of Stage N1.

Question 120: During a split-night PSG, CPAP titration should begin when which criterion is met?

RDI ≥ 10 events/hr after at least 2 hours of diagnostic recording (Correct answer)
At least 3 REM episodes documented on diagnostic portion
SpO2 drops below 85% for more than 5 minutes
AHI ≥ 5 events/hr in the first 30 minutes

Correct answer: RDI ≥ 10 events/hr after at least 2 hours of diagnostic recording

AASM criteria require an RDI ≥ 10 events/hr after a minimum of 2 hours of diagnostic recording before initiating CPAP titration in a split-night study.

Question 121: What EEG characteristic distinguishes Stage N3 sleep from Stage N2 sleep?

Alpha intrusions
Presence of sleep spindles
High-amplitude slow waves occupying ≥20% of epoch (Correct answer)
Presence of K-complexes

Correct answer: High-amplitude slow waves occupying ≥20% of epoch

N3 is defined by slow-wave activity (≥75 µV, 0.5–2 Hz) occupying ≥20% of the scoring epoch.

Question 122: Which artifact most commonly mimics slow eye movements (SEMs) in EOG channels during drowsiness?

60 Hz electrical interference
EKG pulse artifact
ECG artifact
Sweat artifact (Correct answer)

Correct answer: Sweat artifact

Sweat artifacts produce slow, broad deflections in EOG channels that can resemble slow eye movements and must be distinguished by context.

Question 123: A polysomnography supervisor is developing staffing schedules. Which factor should take highest priority?

Rotating all staff equally regardless of competency levels
Ensuring adequate coverage to meet patient safety and accreditation requirements (Correct answer)
Scheduling based solely on seniority
Minimizing staff preferences to reduce scheduling complexity

Correct answer: Ensuring adequate coverage to meet patient safety and accreditation requirements

Patient safety and regulatory/accreditation staffing requirements must always be the primary driver of scheduling decisions.

Question 124: Which of the following is the minimum SpO2 threshold and duration used by AASM to score sleep-related hypoxemia in adults?

SpO2 below 88% for at least 5 minutes cumulative during sleep (Correct answer)
SpO2 below 90% for at least 10 minutes cumulative
SpO2 below 85% for at least 5 minutes
SpO2 below 88% for any single continuous episode

Correct answer: SpO2 below 88% for at least 5 minutes cumulative during sleep

Per AASM criteria, sleep-related hypoxemia in adults is scored when SpO2 is below 88% for ≥5 cumulative minutes during sleep.

Question 125: A nasal pressure transducer is preferred over a thermistor for detecting hypopneas because it:

Better detects flow limitation via waveform flattening (Correct answer)
Is more resistant to condensation artifact
Has a faster thermal response time
Requires no calibration before use

Correct answer: Better detects flow limitation via waveform flattening

Nasal pressure transducers detect the characteristic flow-limited flattened waveform that precedes and defines many hypopneas better than thermistors.

Question 126: A Balanced Scorecard applied to a sleep center typically includes perspectives for financial performance, customer satisfaction, internal processes, and:

Competitor analysis
Learning and growth (staff development and innovation) (Correct answer)
Regulatory compliance tracking only
Equipment depreciation schedules

Correct answer: Learning and growth (staff development and innovation)

The four Balanced Scorecard perspectives are financial, customer, internal processes, and learning & growth, which encompasses staff development and organizational capability.

Question 127: A movement artifact on the EEG that is most likely caused by the patient's heartbeat is called:

Sweat artifact
Ballistocardiogram artifact (Correct answer)
Electrode pop artifact
60 Hz artifact

Correct answer: Ballistocardiogram artifact

Ballistocardiogram artifact appears as rhythmic EEG deflections synchronized with the cardiac cycle caused by movement of electrode leads with each heartbeat.

Question 128: A sleep technologist discovers that a colleague improperly accessed a patient's PSG record out of personal curiosity. Under HIPAA, this is classified as:

A breach of unsecured PHI requiring investigation (Correct answer)
A required disclosure to law enforcement
A permitted use for treatment purposes
An incidental disclosure

Correct answer: A breach of unsecured PHI requiring investigation

Unauthorized access to PHI for non-work-related purposes constitutes a potential breach that must be investigated under the HIPAA Breach Notification Rule.

Question 129: In a PSG report, the respiratory disturbance index (RDI) differs from AHI because it also includes:

Respiratory effort-related arousals (RERAs) (Correct answer)
Snoring events
Cheyne-Stokes events only
Central apneas only

Correct answer: Respiratory effort-related arousals (RERAs)

RDI = AHI + RERA index; it counts apneas, hypopneas, AND respiratory effort-related arousals per hour of sleep.

Question 130: A sleep technologist who administers a home sleep apnea test (HSAT) must ensure that the device used has received which regulatory clearance?

AASM Technical Specifications Seal
FDA 510(k) clearance or approval as a medical device (Correct answer)
CMS Durable Medical Equipment (DME) certification only
EPA environmental safety certification

Correct answer: FDA 510(k) clearance or approval as a medical device

HSAT devices are classified as medical devices and must receive FDA 510(k) clearance or approval before clinical use.

Question 131: Which of the following best describes a K-complex?

High-voltage slow waves >75 µV lasting ≥2 s
Sawtooth waves preceding REM bursts
A burst of 12-14 Hz waveforms lasting ≥0.5 s
A well-delineated negative sharp wave followed by a positive component lasting ≥0.5 s (Correct answer)

Correct answer: A well-delineated negative sharp wave followed by a positive component lasting ≥0.5 s

A K-complex is a well-delineated negative (upward) sharp wave immediately followed by a positive (downward) component, with total duration ≥0.5 seconds.

Question 132: What is the primary objective of RPSGT Exam certification?

To provide tax benefits to employers
To validate professional competence in rpsgt (Correct answer)
To replace formal education requirements
To fulfill a government mandate

Correct answer: To validate professional competence in rpsgt

The RPSGT Exam certification validates that professionals have demonstrated competence and knowledge in their field.

Question 133: Which type of team structure best supports a small sleep center with 6 technologists and one medical director?

Hierarchical bureaucratic structure
Matrix organizational structure
Flat organizational structure (Correct answer)
Virtual team structure

Correct answer: Flat organizational structure

Small teams benefit from flat structures that allow direct communication and quick decision-making without multiple management layers.

Question 134: A technologist notes chin EMG bursts lasting 0.1–0.5 seconds occurring in REM sleep. These are best described as:

Sleep bruxism
Phasic REM muscle activity (Correct answer)
REM sleep behavior disorder activity
Hypnic jerks

Correct answer: Phasic REM muscle activity

Short, irregular chin EMG bursts (0.1–0.5 sec) during REM are classified as phasic REM muscle activity per AASM scoring rules.

Question 135: Which corrective action is MOST appropriate when QA audits reveal that technologists are inconsistently applying AASM arousal scoring rules?

Remove scoring responsibility from technologists
Retire the current scoring manual
Switch to automated scoring software exclusively
Conduct targeted scoring calibration sessions using consensus-scored training records (Correct answer)

Correct 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.

Question 136: In digital PSG systems, what does the term 'common mode rejection ratio' (CMRR) refer to?

The ratio of differential signal gain to common-mode signal gain (Correct answer)
The ratio of electrode impedance to amplifier input impedance
The ratio of A/D converter bits to noise floor
The ratio of sampling rate to signal bandwidth

Correct answer: The ratio of differential signal gain to common-mode signal gain

CMRR measures the amplifier's ability to reject noise common to both inputs while amplifying only the differential (brain) signal.

Question 137: A pharmaceutical company offers an RPSGT a cash gift in exchange for recommending their sleep medication to patients. Accepting this gift would be:

Legal and ethical as long as it is disclosed to the employer
Permissible if the amount is under $50
A conflict of interest and an ethical violation (Correct answer)
Acceptable if the medication is clinically effective

Correct answer: A conflict of interest and an ethical violation

Accepting financial incentives from pharmaceutical companies in exchange for influencing patient care is a conflict of interest that violates professional ethics.

Question 138: A patient's PSG shows an AHI of 18 events/hour with most events in REM sleep. What severity category does this represent?

Severe OSA
Normal
Moderate OSA (Correct answer)
Mild OSA

Correct answer: Moderate OSA

An AHI of 15–30 events/hour is classified as moderate obstructive sleep apnea regardless of sleep stage distribution.

Question 139: An RPSGT notices a co-worker consistently arriving late and showing signs of impairment during night shifts. The ethical obligation is to:

Ignore the behavior unless a patient complaint is filed
Address concerns through proper channels such as a supervisor or employee assistance program (Correct answer)
Confront the colleague publicly during a shift
Cover for the colleague to avoid workplace conflict

Correct answer: Address concerns through proper channels such as a supervisor or employee assistance program

Ethical duty includes protecting patient safety, which requires reporting impaired colleagues through appropriate channels.

Question 140: Under CMS regulations, what is the required retention period for patient medical records in most states for adult patients?

6 years from date of service or until the patient's 21st birthday, whichever is later (Correct answer)
10 years from date of service
5 years from date of service
3 years from date of service

Correct answer: 6 years from date of service or until the patient's 21st birthday, whichever is later

CMS requires records to be retained for 6 years from creation or last effective date, and many states add longer requirements for minors.

Question 141: An arousal in PSG is defined as an abrupt shift in EEG frequency lasting at least how long?

5 seconds
10 seconds
3 seconds (Correct answer)
1 second

Correct answer: 3 seconds

AASM defines an arousal as an abrupt EEG frequency shift lasting at least 3 seconds, preceded by at least 10 seconds of sleep.

Question 142: A patient's EEG shows continuous, diffuse high-amplitude delta activity throughout an entire overnight study. This pattern is most consistent with:

Normal Stage N3 sleep throughout
Severe encephalopathy or deep coma (Correct answer)
Idiopathic hypersomnia
REM behavior disorder

Correct answer: Severe encephalopathy or deep coma

Continuous diffuse delta without normal sleep architecture cycling suggests severe cerebral dysfunction such as encephalopathy or coma.

Question 143: Restless legs syndrome (RLS) is most closely associated with dysfunction in which physiological system?

Cholinergic signaling in the brainstem
Iron-dopamine metabolism in the basal ganglia and spinal cord (Correct answer)
Serotonergic signaling in the cortex
Glutamatergic activity in the thalamus

Correct answer: Iron-dopamine metabolism in the basal ganglia and spinal cord

RLS pathophysiology involves impaired iron metabolism reducing dopaminergic function in the basal ganglia and spinal cord, explaining the response to dopaminergic medications.

Question 144: What is the appropriate action when discovering a colleague has violated professional standards?

Report through proper channels as outlined in the code of ethics (Correct answer)
Post about it on social media
Handle it privately without documentation
Ignore it to maintain the relationship

Correct answer: Report through proper channels as outlined in the code of ethics

Professional standards require reporting violations through proper channels to protect the public and maintain the integrity of the profession.

Question 145: Which type of analysis examines data to identify patterns and trends over time?

Root cause analysis
Cost-benefit analysis
Gap analysis
Trend analysis (Correct answer)

Correct answer: Trend analysis

Trend analysis examines data points collected over time to identify patterns, directions, and changes that can inform forecasting and strategic decisions.

Question 146: The International 10-20 electrode placement system divides the head based on measurements that are what percentage of total skull dimensions?

15% and 25%
5% and 10%
10% and 20% (Correct answer)
20% and 30%

Correct answer: 10% and 20%

The 10-20 system uses 10% and 20% intervals of total nasion-to-inion and preauricular distances to place electrodes.

Question 147: What frequency range defines the theta activity that predominates in Stage N1 sleep?

8–12 Hz
0.5–2 Hz
4–7 Hz (Correct answer)
13–30 Hz

Correct answer: 4–7 Hz

Theta activity (4–7 Hz) is the predominant EEG frequency in Stage N1, replacing the alpha rhythm seen during wakefulness.

Question 148: What is the Plan-Do-Check-Act (PDCA) cycle used for?

Annual budget allocation
Employee performance reviews exclusively
One-time project planning only
Continuous improvement of processes and practices (Correct answer)

Correct answer: Continuous improvement of processes and practices

The PDCA cycle is a systematic approach to continuous improvement where processes are planned, implemented, evaluated, and refined in an ongoing cycle.

Question 149: An RPSGT overhears two colleagues discussing a patient's diagnosis loudly in a common area. What is the most appropriate response?

Report the colleagues to the hospital administrator immediately
Remind the colleagues that patient information must be kept confidential and move the discussion to a private area (Correct answer)
Join the conversation since the information is already being discussed
Ignore the conversation as it is not your concern

Correct answer: Remind the colleagues that patient information must be kept confidential and move the discussion to a private area

HIPAA requires that patient information be discussed only in private, and colleagues should be reminded of this obligation.

Question 150: Narcolepsy type 1 is distinguished from narcolepsy type 2 primarily by the presence of:

Hypnagogic hallucinations
Cataplexy (Correct answer)
Sleep paralysis
Excessive daytime sleepiness

Correct answer: Cataplexy

Narcolepsy type 1 is defined by cataplexy and/or low CSF hypocretin-1 levels, which are absent in narcolepsy type 2.

Question 151: Adaptive servo-ventilation (ASV) is most appropriate for treating which sleep-related breathing disorder?

Complex sleep apnea (treatment-emergent central apnea) or predominant central sleep apnea (Correct answer)
REM-related obstructive sleep apnea in otherwise healthy patients
Primary snoring with an AHI < 5
Obesity hypoventilation syndrome with hypercapnia

Correct answer: Complex sleep apnea (treatment-emergent central apnea) or predominant central sleep apnea

ASV continuously adjusts pressure support breath-by-breath to servo-control the patient's ventilation, targeting a recent average peak flow. It is specifically designed for complex (mixed/central-predominant) sleep apnea and Cheyne-Stokes respiration, conditions where fixed CPAP or BiPAP are insufficient.

Question 152: What is the frequency range of slow wave activity (delta waves) as defined by the AASM Scoring Manual for N3 scoring?

6–8 Hz
2–4 Hz
4–6 Hz
0.5–2 Hz (Correct answer)

Correct answer: 0.5–2 Hz

AASM defines slow wave activity for N3 scoring as frequencies of 0.5–2 Hz with peak-to-peak amplitude >75 µV in frontal leads.

Question 153: Which PAP modality delivers a higher inspiratory pressure (IPAP) and a lower expiratory pressure (EPAP), making it useful for patients who struggle to exhale against CPAP pressure?

CPAP (continuous positive airway pressure)
BiPAP/BPAP (bilevel positive airway pressure) (Correct answer)
APAP (auto-titrating positive airway pressure)
ASV (adaptive servo-ventilation)

Correct answer: BiPAP/BPAP (bilevel positive airway pressure)

BiPAP delivers two distinct pressure levels: a higher IPAP during inhalation and a lower EPAP during exhalation. This pressure differential reduces the work of exhalation and is particularly useful for patients who are intolerant of fixed CPAP pressure or have hypoventilation disorders.

Question 154: During PSG, a technologist observes rhythmic, saw-tooth appearing artifact in the ECG channel that correlates with the patient's respiratory rate. This is MOST likely:

Premature ventricular contractions during apneas
Respiratory baseline wander from electrode movement (Correct answer)
Sinus arrhythmia causing rate variation
Atrial flutter with a 2:1 block

Correct answer: Respiratory baseline wander from electrode movement

Respiratory baseline wander in the ECG channel is caused by chest movement altering electrode-skin impedance rhythmically at the breathing rate.

Question 155: Phasic chin muscle activity (transient muscle activity) during REM is scored when bursts last:

1.0–2.0 seconds
0.1–0.5 seconds
0.25–0.5 seconds (Correct answer)
0.5–1.0 seconds

Correct answer: 0.25–0.5 seconds

AASM defines phasic chin EMG bursts during REM as lasting 0.25–0.5 seconds with amplitude at least 4× the background EMG level.

Question 156: What does 'PDSA cycle' stand for in the context of sleep lab quality improvement?

Plan, Do, Study, Act (Correct answer)
Process, Data, Standards, Audit
Prevent, Detect, Score, Analyze
Protocol, Documentation, Scoring, Assessment

Correct 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.

Question 157: Which AASM-recommended derivation is used as the primary airflow channel for scoring apneas?

Nasal pressure transducer
Piezoelectric chest belt
Pulse oximetry waveform
Oronasal thermal sensor (Correct answer)

Correct answer: Oronasal thermal sensor

The oronasal thermal sensor is the recommended channel for identifying apneas (complete cessation of airflow), while nasal pressure is used for hypopneas.

Question 158: In pediatric PSG scoring, the apnea-hypopnea index threshold for considering treatment in children is:

AHI ≥5 events/hour
AHI ≥15 events/hour
AHI ≥10 events/hour
AHI ≥1 event/hour (Correct answer)

Correct answer: AHI ≥1 event/hour

AASM guidelines consider an AHI ≥1 event/hour abnormal in children, a lower threshold than the adult standard of ≥5.

Question 159: Sawtooth waves during polysomnography are most commonly associated with which sleep stage?

N2
N3
N1
REM (Correct answer)

Correct answer: REM

Sawtooth waves (2–6 Hz, notched waveforms) are a characteristic feature of REM sleep, often preceding bursts of rapid eye movements.

Question 160: During NREM sleep, a respiratory event with ≥30% reduction in airflow lasting ≥10 seconds associated with 3% oxygen desaturation should be scored as:

Respiratory effort-related arousal (RERA)
Hypopnea (Correct answer)
Obstructive apnea
Central apnea

Correct answer: Hypopnea

A ≥30% airflow reduction ≥10 seconds with ≥3% desaturation meets AASM criteria for a hypopnea.

Question 161: The standard PSG epoch length used for manual sleep staging according to AASM rules is:

20 seconds
5 seconds
30 seconds (Correct answer)
60 seconds

Correct answer: 30 seconds

AASM scoring rules specify a standard epoch length of 30 seconds for sleep staging. Each epoch receives exactly one sleep stage designation (W, N1, N2, N3, or R). Thirty seconds was chosen to align with the traditional paper PSG speed of 10 mm/sec (which yields a 30-cm/page recording at that speed).

Question 162: Which scenario BEST illustrates the 'implementation gap' in strategic planning?

A budget variance exceeds 5% in one quarter
A referring physician declines to participate in a quality committee
A detailed strategic plan is created but never translated into specific staff actions or accountabilities (Correct answer)
A strategic goal is set and fully achieved on schedule

Correct answer: A detailed strategic plan is created but never translated into specific staff actions or accountabilities

The implementation gap occurs when strategic plans remain at a high level and are not converted into specific, assigned, accountable actions, resulting in no real change.

Question 163: During a sleep study, you discover a patient's prescribed CPAP pressure appears ineffective but you are not authorized to adjust it. What should you do?

Document your observations and notify the supervising physician (Correct answer)
Adjust the pressure based on your clinical judgment
Discontinue the study and send the patient home
Do nothing since it is not within your scope to observe such issues

Correct answer: Document your observations and notify the supervising physician

Technologists must operate within their scope of practice by documenting findings and escalating clinical concerns to the supervising physician.

Question 164: An RPSGT is asked to participate in a quality improvement meeting about patient satisfaction scores. What type of communication is most valuable to bring to this meeting?

Comparisons to competitor sleep labs
Complaints about scheduling and staffing
Documented patient feedback, observed barriers to comfort, and suggestions based on clinical experience (Correct answer)
Personal opinions about physician preferences

Correct answer: Documented patient feedback, observed barriers to comfort, and suggestions based on clinical experience

Evidence-based observations and documented patient feedback provide actionable data for quality improvement discussions.

Question 165: A patient undergoing a Multiple Sleep Latency Test (MSLT) falls asleep between naps in a hallway chair. What is the MOST important risk management concern?

The hallway lighting may affect the patient's melatonin levels
The patient may miss the scheduled nap window
The patient is at risk for a fall from a non-secured sleeping position in an unsupervised area (Correct answer)
The nap may invalidate the MSLT data

Correct answer: The patient is at risk for a fall from a non-secured sleeping position in an unsupervised area

Patients undergoing MSLT are profoundly sleepy and must be supervised to prevent injury from falling asleep in unsafe, unsecured environments.

Question 166: What EEG waveform defines stage N1 sleep in patients who generate a well-defined alpha rhythm while awake?

Presence of K-complexes
Replacement of alpha rhythm by low-amplitude mixed-frequency activity (Correct answer)
Appearance of sleep spindles
High-voltage delta waves exceeding 75 µV

Correct answer: Replacement of alpha rhythm by low-amplitude mixed-frequency activity

In patients with alpha rhythm, N1 is scored when alpha is attenuated and replaced by low-amplitude mixed-frequency (predominantly 4–7 Hz) EEG activity.

Question 167: Which scoring rule applies when a mixed apnea transitions from a central to an obstructive pattern?

Score as mixed apnea (Correct answer)
Score as central apnea
Score as obstructive apnea
Score as hypopnea

Correct answer: Score as mixed apnea

Events beginning with absent respiratory effort and ending with obstructive features are scored as mixed apneas.

Question 168: Which electrode impedance threshold must be met before beginning a PSG recording according to best practice?

Below 10 kΩ (Correct answer)
Below 50 kΩ
Below 25 kΩ
Below 5 kΩ

Correct answer: Below 10 kΩ

Electrode impedance should be below 10 kΩ (ideally ≤5 kΩ) to ensure adequate signal quality.

Question 169: Which of the following best describes a 'span of control' in a sleep center management context?

The geographic area covered by a single sleep center
The range of equipment a technologist is certified to operate
The number of subordinates a manager directly supervises (Correct answer)
The number of patients a single technologist can monitor simultaneously

Correct answer: The number of subordinates a manager directly supervises

Span of control refers to the number of direct reports a manager oversees, which affects delegation and communication effectiveness.

Question 170: A HEOG (horizontal electro-oculogram) montage detects eye movements by placing electrodes:

Above and below each eye
At the supraorbital ridge bilaterally
At the inner canthi of each eye
At the outer canthi of each eye (Correct answer)

Correct answer: At the outer canthi of each eye

HEOG electrodes are placed at the outer canthi (lateral edges) of each eye to detect lateral eye movements.

Question 171: What does an oxygen desaturation index (ODI) quality flag on an HSAT report MOST likely indicate for QA purposes?

The HSAT device malfunctioned and must be returned to the manufacturer
The patient moved excessively during the recording
The patient has severe sleep apnea requiring urgent CPAP
The SpO2 signal had excessive artifact, making the ODI unreliable (Correct answer)

Correct answer: The SpO2 signal had excessive artifact, making the ODI unreliable

An ODI quality flag in HSAT analysis typically indicates that the oximetry signal contained enough artifact to compromise the reliability of the desaturation index calculation.

Question 172: What should be the first action when a new regulation is enacted that affects your practice?

Wait for enforcement before making changes
Assume existing procedures already comply
Review the regulation, assess its impact, and develop an implementation plan (Correct answer)
Delegate review to the newest team member

Correct answer: Review the regulation, assess its impact, and develop an implementation plan

When new regulations are enacted, professionals should promptly review them, assess their impact on current practices, and develop a structured implementation plan.

Question 173: During a PSG study, the EEG suddenly shows a dramatic change in waveform morphology across all channels simultaneously. What is the most likely cause and the FIRST action to take?

The room lights are causing interference; dim them further
Electrode artifact or a technical failure; check electrode impedances and connections (Correct answer)
The patient is having a seizure; call emergency services
The patient has entered REM sleep; continue monitoring

Correct answer: Electrode artifact or a technical failure; check electrode impedances and connections

Simultaneous changes across all channels are almost always a technical artifact or equipment failure rather than a physiologic event, and should be verified technically first.

Question 174: Which metric is MOST useful for evaluating the operational efficiency of a polysomnography program?

Revenue per study scored
Number of technologists employed
Study turnaround time from acquisition to report delivery (Correct answer)
Total square footage of the sleep lab

Correct answer: Study turnaround time from acquisition to report delivery

Turnaround time directly reflects workflow efficiency and affects both patient care and revenue cycle.

Question 175: A CPAP-titration patient complains of significant aerophagia (air swallowing) causing abdominal bloating at a pressure of 12 cmH2O. What is the most appropriate risk-mitigation response?

Increase pressure to 16 cmH2O to reduce apneas faster
Ignore the complaint as it is not life-threatening
Administer an antacid from the lab supply cabinet
Notify the interpreting physician and document the complaint; consider lowering pressure or switching to BiPAP (Correct answer)

Correct answer: Notify the interpreting physician and document the complaint; consider lowering pressure or switching to BiPAP

Aerophagia is a known CPAP complication; the physician must be informed so a clinical decision can be made about pressure adjustment or modality change.

RPSGT (Registered Polysomnographic Technologist) Exam

The RPSGT exam is administered by the Board of Registered Polysomnographic Technologists (BRPT). It consists of 175 multiple-choice questions (150 scored, 25 unscored pretest items) with a 3-hour time limit. A scaled passing score of 350 out of 500 is required. The exam covers four content domains: Clinical Overview, Education, and Patient Support (17.3%); Sleep Study Preparation and Performance (29.3%); Scoring, Reporting, and Data Verification (25.3%); and Therapeutic Treatment and Intervention (28%).

175

Questions

180 min

Time Limit

70%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds

These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

brpt.org — Test delivery, eligibility, fees, exam format, passing score, retake fee, retake policy, score release, test dates, time limit · verified Oct 2026
pearsonvue.com — Registration deadline · verified Oct 2026