RPSGT (Registered Polysomnographic Technologist) Exam — Questions and Answers

Question 1: A patient asks the RPSGT to explain their preliminary sleep study findings before the physician reviews them. The technologist should:

Explain what was recorded technically without rendering a medical diagnosis (Correct answer)
Provide a full interpretation of all findings immediately
Share only findings the patient will find reassuring
Refuse all discussion about the study until the physician releases results

Correct answer: Explain what was recorded technically without rendering a medical diagnosis

Technologists may explain what was recorded (e.g., electrode placement, events captured) but must leave diagnostic interpretation to the supervising physician.

Question 2: What is the minimum duration a K-complex must meet to satisfy AASM scoring criteria?

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

Correct answer: 0.5 seconds

AASM requires a K-complex to have a total duration of ≥0.5 seconds.

Question 3: Which AASM-recommended derivation is used as the primary airflow channel for scoring apneas?

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

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 4: Under the Americans with Disabilities Act (ADA), a sleep lab must make reasonable accommodations for a patient who uses a motorized wheelchair by:

Ensuring accessible pathways, bathroom facilities, and adjustable equipment as feasible (Correct answer)
Referring the patient to a home sleep testing provider instead
Charging an additional fee to cover accommodation costs
Obtaining a physician waiver before scheduling the study

Correct answer: Ensuring accessible pathways, bathroom facilities, and adjustable equipment as feasible

The ADA requires healthcare facilities to provide reasonable accommodations to ensure equal access for patients with disabilities.

Question 5: What is the primary purpose of industry regulations in this field?

To create barriers to entry for new professionals
To generate revenue for regulatory bodies
To limit competition in the marketplace
To protect the public and ensure consistent professional standards (Correct answer)

Correct answer: To protect the public and ensure consistent professional standards

Industry regulations are primarily designed to protect the public by ensuring professionals meet consistent standards of competence and conduct.

Question 6: When scoring a split-night PSG, titration data should begin after how many hours of diagnostic recording according to AASM guidelines?

3 hours
1 hour
4 hours
2 hours (Correct answer)

Correct answer: 2 hours

AASM guidelines recommend at least 2 hours of diagnostic recording before initiating CPAP titration on a split-night study.

Question 7: Which of the following leg movement events should NOT be included in the PLM index calculation?

Movements during NREM sleep
Movements occurring within 0.5 seconds of an apnea termination (Correct answer)
Movements during REM sleep
Movements with amplitude ≥8 µV

Correct answer: Movements occurring within 0.5 seconds of an apnea termination

AASM rules exclude leg movements occurring within 0.5 seconds before or after a respiratory event from the PLM count.

Question 8: 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
REM sleep must be recorded before transitioning
At least 1 hour of diagnostic recording with any obstructive events
At least 2 hours of diagnostic recording with an AHI ≥ 40 events/hour (Correct answer)

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 9: A patient's family member calls the lab during the study requesting an update on the patient. What should the RPSGT do?

Refuse all communication with family members regardless of circumstances
Confirm the patient is present and refer the caller to speak with the patient directly or obtain authorized release (Correct answer)
Transfer the call directly to the lab director
Provide a detailed update on all findings so far

Correct answer: Confirm the patient is present and refer the caller to speak with the patient directly or obtain authorized release

HIPAA restricts disclosure of patient information to unauthorized parties; the patient must authorize release or speak directly.

Question 10: What is the recommended low-frequency filter setting for scoring EEG in polysomnography?

0.1 Hz
1.0 Hz
5.0 Hz
0.3 Hz (Correct answer)

Correct answer: 0.3 Hz

AASM recommends a 0.3 Hz low-frequency filter for EEG channels to preserve slow-wave activity.

Question 11: A patient with severe obstructive sleep apnea is scheduled for a split-night study. Which condition would most contraindicate proceeding with CPAP titration in the second half of the night?

Patient reports chest pain during the diagnostic portion (Correct answer)
Oxygen nadir of 85% during the diagnostic portion
Patient is a mouth breather
AHI of 20 during the diagnostic portion

Correct answer: Patient reports chest pain during the diagnostic portion

New-onset chest pain during sleep testing is a medical emergency that requires stopping the study and contacting emergency services.

Question 12: What is the typical duration of a sleep spindle?

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

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 13: What is the proper way to correct an error in professional documentation?

Use white-out to cover the error completely
Draw a single line through the error, initial, date, and write the correction (Correct answer)
Ignore the error if it seems minor
Remove the page and create a new one

Correct answer: Draw a single line through the error, initial, date, and write the correction

Proper error correction involves drawing a single line through the error (so it remains readable), adding initials and date, and writing the correct information nearby.

Question 14: 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
Moderate OSA (Correct answer)
Mild OSA
Normal

Correct answer: Moderate OSA

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

Question 15: A sleep technologist who administers a home sleep apnea test (HSAT) must ensure that the device used has received which regulatory clearance?

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

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 16: Why is continuous improvement important in quality management?

Because regulators demand changes every year
Because employees need new tasks to stay busy
Because standards evolve, competitors improve, and customer expectations change (Correct answer)
Because existing processes are always fundamentally flawed

Correct answer: Because standards evolve, competitors improve, and customer expectations change

Continuous improvement is essential because the competitive landscape, customer expectations, and industry standards are constantly evolving, requiring ongoing adaptation.

Question 17: Which sleep-related breathing disorder involves cessation of both airflow and respiratory effort?

Obstructive sleep apnea
Upper airway resistance syndrome
Mixed apnea
Central sleep apnea (Correct answer)

Correct answer: Central sleep apnea

Central sleep apnea is defined by cessation of both airflow and respiratory effort, as the brain fails to send signals to the breathing muscles.

Question 18: In strategic planning, a 'stretch goal' differs from a standard performance target in that it:

Is deliberately ambitious, designed to drive innovation beyond incremental improvement (Correct answer)
Must be achieved within 30 days
Applies only to financial performance metrics
Is set below current performance to ensure achievement

Correct answer: Is deliberately ambitious, designed to drive innovation beyond incremental improvement

Stretch goals are intentionally challenging targets that push teams to develop new approaches rather than relying on incremental improvement.

Question 19: What is a dashboard in the context of data reporting?

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

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 20: Which eye movement feature distinguishes slow eye movements (SEMs) of N1 from the rapid eye movements of Stage R?

SEMs are recorded on EEG; REMs are recorded on EMG
SEMs have sinusoidal waveforms lasting >500 ms; REMs have irregular bursts <500 ms (Correct answer)
SEMs are conjugate; REMs are disconjugate
SEMs occur only during alpha activity; REMs occur during delta

Correct answer: SEMs have sinusoidal waveforms lasting >500 ms; REMs have irregular bursts <500 ms

SEMs are conjugate sinusoidal deflections with initial deflection lasting >500 ms, whereas REMs are irregular, sharply peaked conjugate movements with initial deflection <500 ms.

Question 21: Sawtooth waves in PSG are most closely associated with which sleep stage?

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

Correct answer: Stage R

Sawtooth waves are serrated 2-6 Hz waveforms occurring in bursts that typically precede or accompany REM sleep eye movements.

Question 22: An EEG frequency shift qualifies as an arousal in AASM scoring if it lasts a minimum of how many seconds?

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

Correct answer: 3 seconds

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

Question 23: During REM sleep, which EEG pattern is characteristically observed?

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

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

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

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 25: In infants, what is the term for the sleep state that is the developmental equivalent of REM sleep, characterized by irregular breathing, eye movements, and low muscle tone?

Quiet sleep
Active sleep (Correct answer)
Indeterminate sleep
Transitional sleep

Correct answer: Active sleep

In neonates and young infants, sleep is classified as active sleep (equivalent to adult REM), quiet sleep (equivalent to adult NREM), and indeterminate/transitional sleep. Active sleep is characterized by irregular breathing, rapid eye movements, occasional body movements, and low chin EMG tone — mirroring REM sleep features.

Question 26: Why is regular risk reassessment important?

Because initial assessments are always wrong
Because it provides work for risk management teams
Because the risk landscape changes as conditions, activities, and environments evolve (Correct answer)
Because regulators require it exactly once per year

Correct answer: Because the risk landscape changes as conditions, activities, and environments evolve

Regular risk reassessment is essential because risks are dynamic — new threats emerge, existing risks change in severity, and the effectiveness of controls may vary over time.

Question 27: When reporting CPAP titration results, the optimal pressure is the level that eliminates:

Obstructive apneas, hypopneas, RERAs, and snoring in all sleep stages and positions (Correct answer)
All snoring only
Desaturations below 88%
Apneas in NREM sleep only

Correct answer: Obstructive apneas, hypopneas, RERAs, and snoring in all sleep stages and positions

Optimal CPAP pressure abolishes obstructive apneas, hypopneas, RERAs, and snoring across all sleep stages and body positions.

Question 28: According to AASM pediatric scoring rules, a hypopnea must include a peak signal excursion drop of at least what percentage from baseline, associated with either an arousal or a ≥ 3% oxygen desaturation?

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

Correct answer: 30%

The AASM recommended pediatric hypopnea definition requires a ≥ 30% drop in the peak oronasal thermal sensor or nasal pressure signal excursion from baseline, associated with either an arousal or a ≥ 3% oxygen desaturation. This 30% threshold is the same as the AASM recommended adult rule.

Question 29: Adaptive servo-ventilation (ASV) is contraindicated in which specific patient population, based on the findings of the SERVE-HF clinical trial?

Elderly patients with complex sleep apnea over age 70
Patients with obesity hypoventilation syndrome and hypercapnia
Patients with REM-predominant obstructive sleep apnea
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 30: Which brain region is considered the master circadian pacemaker in humans?

Raphe nuclei
Suprachiasmatic nucleus (SCN) (Correct answer)
Pineal gland
Locus coeruleus

Correct answer: Suprachiasmatic nucleus (SCN)

The suprachiasmatic nucleus in the hypothalamus is the primary circadian clock, synchronizing to light-dark cycles.

Question 31: A technologist discovers that the previous technologist's night-shift documentation omitted a 4-minute period of oxygen desaturation below 80%. What is the most appropriate action?

Correct the record yourself without notification to avoid drawing attention to the error
Notify the supervising physician and ensure the event is added to the final record with proper documentation (Correct answer)
Discard the entire study and repeat it
Ignore it since the study is already over

Correct answer: Notify the supervising physician and ensure the event is added to the final record with proper documentation

Significant clinical events must be accurately documented in the medical record; the physician must be notified so the omission is corrected through proper channels.

Question 32: 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)
Obesity hypoventilation syndrome with hypercapnia
Primary snoring with an AHI < 5
REM-related obstructive sleep apnea in otherwise healthy patients

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

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

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 34: What EEG derivation is recommended by the AASM for detecting slow-wave activity during NREM staging?

F4-M1 (Correct answer)
T3-M2
C4-M1
O2-M1

Correct answer: F4-M1

The AASM recommends the frontal derivation (F4-M1 or F3-M2) as the primary channel for detecting slow-wave activity because delta is of highest amplitude frontally.

Question 35: Mandibular advancement devices (MADs) treat obstructive sleep apnea through which primary mechanism?

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

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 36: 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
REM behavior disorder
Severe encephalopathy or deep coma (Correct answer)
Idiopathic hypersomnia

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 37: Which regulatory requirement mandates that sleep labs maintain electrical safety standards and perform equipment checks to prevent patient injury?

OSHA Electrical Safety Standard (29 CFR 1910.303) (Correct answer)
ADA Title III
CMS Interpretive Guidelines §482.13
HIPAA Security Rule

Correct answer: OSHA Electrical Safety Standard (29 CFR 1910.303)

OSHA's electrical safety standards require employers to ensure that electrical equipment used in the workplace is maintained to prevent hazards.

Question 38: During a QA review, a lab finds that 20% of portable (OCST) studies have missing flow signal data. What should be the FIRST corrective step?

Switch vendors immediately
Score the affected studies using oximetry alone
Eliminate OCST studies from the lab's offerings
Conduct root-cause analysis to identify why flow signals are failing (Correct answer)

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

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

Question 39: Sawtooth waves during polysomnography are most commonly associated with which sleep stage?

N1
N3
N2
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 40: Which of the following EEG waveforms is characterized by a frequency of 0.5–2 Hz and amplitude greater than 75 µV?

Delta waves (Correct answer)
Sleep spindles
Alpha waves
K-complexes

Correct answer: Delta waves

Delta waves are defined by frequencies of 0.5–2 Hz and amplitudes exceeding 75 µV, and they define slow-wave sleep.

Question 41: For the left outer canthus EOG electrode (E1), what is the correct placement according to AASM specifications?

1 cm below and 1 cm lateral to the outer canthus (Correct answer)
1 cm above and 1 cm lateral to the outer canthus
2 cm above the outer canthus
Directly on the outer canthus

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

E1 is placed 1 cm below and 1 cm lateral to the left outer canthus to capture vertical and horizontal eye movements.

Question 42: A sleep technologist discovers that a colleague improperly accessed a patient's PSG record out of personal curiosity. Under HIPAA, this is classified as:

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

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 43: A technologist reviewing a home sleep apnea test (HSAT) must remember that the AHI from HSAT is based on:

Supine sleep time
REM sleep time only
Total recording time rather than total sleep time (Correct answer)
Total sleep time estimated by actigraphy

Correct answer: Total recording time rather than total sleep time

HSAT devices typically cannot confirm sleep; the AHI is therefore calculated per hour of total recording time, which can underestimate severity.

Question 44: Which sleep disorder is characterized by recurrent episodes of partial or complete upper airway obstruction during sleep?

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

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 45: Upper airway resistance syndrome (UARS) differs from OSA primarily in that:

It affects only pediatric patients
It always causes oxygen desaturations
It occurs exclusively during REM sleep
Arousals occur from increased respiratory effort without meeting apnea/hypopnea criteria (Correct answer)

Correct answer: Arousals occur from increased respiratory effort without meeting apnea/hypopnea criteria

UARS is characterized by increased upper airway resistance causing EEG arousals and sleep fragmentation without meeting standard apnea or hypopnea scoring thresholds.

Question 46: According to AASM scoring rules, what percentage of an epoch must consist of slow wave activity to score Stage N3?

≥10%
≥20% (Correct answer)
≥30%
≥50%

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

Weakness
Threat (Correct answer)
Strength
Opportunity

Correct answer: Threat

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

Question 48: In a healthy young adult, approximately what percentage of total sleep time is spent in REM sleep?

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

Correct answer: 20–25%

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

Question 49: A nasal pressure transducer is preferred over a thermistor for detecting hypopneas because it:

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

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 50: An RPSGT in a supervisory role needs to provide corrective feedback to a technologist about poor patient interaction skills. Which feedback approach is most constructive?

Delay feedback until the annual performance review
Deliver feedback publicly during a team meeting to reinforce the standard
Send an anonymous note to avoid confrontation
Use the 'sandwich' or DESC (Describe, Express, Specify, Consequences) method in a private setting (Correct answer)

Correct answer: Use the 'sandwich' or DESC (Describe, Express, Specify, Consequences) method in a private setting

Private, structured feedback using a specific model like DESC focuses on behavior and outcomes while preserving the employee's dignity.

Question 51: Phasic chin muscle activity (transient muscle activity) during REM is scored when bursts last:

0.25–0.5 seconds (Correct answer)
1.0–2.0 seconds
0.1–0.5 seconds
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 52: Which organization administers the RPSGT credential and sets the standards for certification eligibility?

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

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 53: An epoch has high-amplitude delta waves occupying 45% of the epoch. The prior epoch had ≥20% delta. How is this epoch scored?

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

Correct answer: Stage N2

Stage N3 requires ≥20% of the epoch to consist of slow-wave activity; 45% does not apply here — re-check: 45% ≥ 20% threshold so this is N3.

Question 54: A sleep center manager wants to reduce staff turnover. Which strategy is most directly associated with improving employee retention?

Reducing break times to improve lab efficiency
Providing regular performance feedback and professional development opportunities (Correct answer)
Limiting communication between shifts to avoid gossip
Increasing the number of mandatory overtime shifts

Correct answer: Providing regular performance feedback and professional development opportunities

Regular feedback and growth opportunities increase job satisfaction and commitment, directly reducing turnover.

Question 55: A technologist notices the chin EMG signal is flat throughout the recording. The FIRST troubleshooting step should be:

Check electrode impedances at the chin site (Correct answer)
Switch to a backup chin EMG channel if available
Replace the EMG electrodes and reapply
Increase the amplifier sensitivity setting

Correct answer: Check electrode impedances at the chin site

Checking impedance first identifies whether the problem is poor electrode contact (high impedance) before making hardware changes.

Question 56: The international 10-20 electrode placement system gets its name from what?

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

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 57: 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?

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

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 58: Which document outlines the specific accreditation standards sleep centers must meet as set by the AASM?

HIPAA Privacy Rule §164.530
The Federal Register
CMS Conditions of Coverage
AASM Standards for Accreditation (Correct answer)

Correct answer: AASM Standards for Accreditation

The AASM Standards for Accreditation define the requirements for personnel, facility, equipment, and policies that sleep centers must fulfill.

Question 59: A sleep center is experiencing high rates of near-miss incidents. Which safety culture concept should the leadership team prioritize implementing?

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

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 60: An RPSGT supervisor must address a situation where a staff member refuses to follow a new infection control protocol. What is the most appropriate initial response?

Have a direct conversation to understand the resistance and reinforce the rationale and mandatory nature of the policy (Correct answer)
Ignore the refusal if the staff member is otherwise high-performing
Immediately escalate to termination proceedings
Allow the staff member to continue their old practice until they feel comfortable

Correct answer: Have a direct conversation to understand the resistance and reinforce the rationale and mandatory nature of the policy

Understanding the reason for resistance while clearly communicating that compliance is non-negotiable is the first step before escalating discipline.

Question 61: 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)
ASV (adaptive servo-ventilation)
BiPAP/BPAP (bilevel positive airway pressure) (Correct answer)
APAP (auto-titrating positive airway pressure)

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

Perform calibration scoring on a set of known studies and review discrepancies (Correct answer)
Have them shadow another technologist for one night
Compare their reports to the referring physician's clinical notes
Assign them independent overnight studies immediately

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

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

Question 63: Which statistical concept helps distinguish between 'common cause' and 'special cause' variation in a sleep lab's PSG quality metrics?

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

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

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

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

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

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 66: 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?

Discontinue the study and send the patient home
Document your observations and notify the supervising physician (Correct answer)
Adjust the pressure based on your clinical judgment
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 67: Which PSG channel configuration is recommended by AASM for detecting bruxism during sleep?

EEG derivation over the temporal region to detect muscle artifact
Bilateral masseter EMG electrodes in addition to the standard submental EMG (Correct answer)
Bilateral masseter EMG electrodes with high-pass filter at 10 Hz
Single submental EMG channel with high sensitivity

Correct answer: Bilateral masseter EMG electrodes in addition to the standard submental EMG

AASM recommends adding bilateral masseter EMG electrodes supplementing standard submental EMG to improve bruxism detection sensitivity and specificity.

Question 68: 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)
Psychophysiological insomnia
Non-24-hour sleep-wake rhythm disorder
Advanced sleep-wake phase disorder

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

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

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 70: Delayed sleep-wake phase disorder (DSWPD) is most prevalent in which population?

Adolescents and young adults (Correct answer)
Infants and toddlers
Middle-aged adults ages 40–60
Elderly adults over age 65

Correct answer: Adolescents and young adults

DSWPD is most common in adolescents and young adults, affecting approximately 7–16% of this population due to biological circadian shifts during puberty.

Question 71: Cultural competence in sleep medicine practice primarily involves:

Limiting study protocols based on a patient's cultural background
Recognizing and respecting cultural differences that may influence patient care and communication (Correct answer)
Requiring all patients to speak English during consultations
Applying the same communication style uniformly to all patients

Correct answer: Recognizing and respecting cultural differences that may influence patient care and communication

Cultural competence means understanding and respecting how cultural factors influence health beliefs and communication to provide equitable, effective care.

Question 72: What distinguishes quality assurance from quality control?

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

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 73: A patient on home oxygen therapy arrives without their prescribed supplemental oxygen device. What should the RPSGT do?

Contact the ordering physician to obtain orders before providing any supplemental oxygen (Correct answer)
Use whatever oxygen flow rate seems appropriate based on the patient's baseline SpO2
Proceed with the study without supplemental oxygen to obtain baseline data
Refuse to admit the patient

Correct answer: Contact the ordering physician to obtain orders before providing any supplemental oxygen

Supplemental oxygen is a physician-ordered therapy; the technologist must obtain orders before administering or altering oxygen delivery.

Question 74: According to AASM guidelines, which combination of features is required to score an epoch as Stage REM?

Sleep spindles + rapid eye movements + low chin EMG
Alpha EEG + rapid eye movements + high chin EMG
Low-amplitude mixed-frequency EEG + rapid eye movements + low chin EMG (Correct answer)
Slow wave activity + sawtooth waves + low 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 75: What is the minimum preceding sleep duration required before an EEG frequency shift can be scored as an arousal per AASM rules?

15 seconds
30 seconds
5 seconds
10 seconds (Correct answer)

Correct answer: 10 seconds

AASM requires at least 10 seconds of stable sleep preceding the EEG frequency shift for it to qualify as a scoreable arousal.

Question 76: 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?

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

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 77: 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?

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

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 78: What is the purpose of a technology needs assessment?

To identify gaps between current capabilities and desired outcomes (Correct answer)
To purchase the most expensive available solution
To justify the IT department's budget
To replace all manual processes immediately

Correct answer: To identify gaps between current capabilities and desired outcomes

A technology needs assessment systematically identifies gaps between current technological capabilities and desired outcomes, guiding informed technology investment decisions.

Question 79: What is the purpose of a feedback mechanism in professional communication?

To ensure messages are received, understood, and to identify areas for improvement (Correct answer)
To evaluate employee performance
To document complaints for legal purposes only
To generate metrics for annual reports

Correct answer: To ensure messages are received, understood, and to identify areas for improvement

Feedback mechanisms verify that communication is effective by confirming messages are received and understood, while also identifying opportunities to improve communication processes.

Question 80: In pediatric PSG scoring, the apnea-hypopnea index threshold for considering treatment in children is:

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

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 81: What should be done when strategic implementation encounters unexpected obstacles?

Assess the situation, adjust the plan as needed, and communicate changes to stakeholders (Correct answer)
Continue without changes regardless of obstacles
Abandon the strategy entirely and start over
Blame the planning team and reassign responsibilities

Correct answer: Assess the situation, adjust the plan as needed, and communicate changes to stakeholders

When obstacles arise during implementation, the appropriate response is to assess the situation, make necessary adjustments to the plan, and communicate changes to all affected stakeholders.

Question 82: Why is confidentiality important in professional practice?

It reduces paperwork requirements
It protects sensitive information and maintains trust between professionals and clients (Correct answer)
It eliminates the need for documentation
It simplifies communication processes

Correct answer: It protects sensitive information and maintains trust between professionals and clients

Confidentiality is essential because it protects sensitive information entrusted to professionals and maintains the trust necessary for effective professional relationships.

Question 83: Which metric is MOST useful for evaluating the operational efficiency of a polysomnography program?

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

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 84: In the pathophysiology of obstructive sleep apnea, which anatomical factor is the PRIMARY determinant of pharyngeal collapsibility?

Tracheal tug caused by lung volume reduction
Hypercapnic drive to the genioglossus
Negative intraluminal pressure during inspiration relative to upper airway muscle tone (Correct answer)
Increased thyromental distance

Correct answer: Negative intraluminal pressure during inspiration relative to upper airway muscle tone

OSA occurs when inspiratory negative intraluminal pressure exceeds the capacity of pharyngeal dilator muscles (especially genioglossus) to maintain airway patency.

Question 85: A colleague asks you to sign off on a patient record they forgot to complete. What should you do?

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

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 86: 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?

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

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

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

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

N2
REM
N3
N1 (Correct answer)

Correct answer: N1

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

Question 89: On a PSG report, WASO stands for:

Wake after sleep opportunity
Wake and slow-wave onset
Waveform analysis sleep output
Wake after sleep onset (Correct answer)

Correct answer: Wake after sleep onset

WASO (Wake After Sleep Onset) is the total wake time occurring between sleep onset and the final awakening.

Question 90: What role do key performance indicators play in strategic implementation?

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

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 91: Leg movements during sleep are considered periodic (PLMs) when they occur in groups of at least how many consecutive movements?

3
4 (Correct answer)
5
2

Correct answer: 4

AASM criteria require a minimum of 4 consecutive qualifying leg movements to score a PLM series.

Question 92: Which scoring rule applies when a mixed apnea transitions from a central to an obstructive pattern?

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

Correct answer: Score as mixed apnea

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

Question 93: A 60-Hz artifact appearing on EEG channels is most likely caused by:

Patient movement
AC electrical interference (Correct answer)
Muscle artifact from the frontalis
Electrode impedance mismatch

Correct answer: AC electrical interference

60-Hz artifact results from alternating current (AC) electrical interference from nearby equipment or poor grounding.

Question 94: Under CMS regulations, what is the required retention period for patient medical records in most states for adult patients?

10 years from date of service
3 years from date of service
6 years from date of service or until the patient's 21st birthday, whichever is later (Correct answer)
5 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 95: 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?

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

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 96: Body position during a PSG is most commonly recorded using:

A position sensor whose data is embedded as a channel in the EDF/PSG file (Correct answer)
Patient self-report at wake time
Video review only after the study
Written notes taken every 15 minutes by the technician

Correct answer: A position sensor whose data is embedded as a channel in the EDF/PSG file

A body position sensor channel synchronized with the recording allows precise correlation of position with respiratory events and sleep stages.

Question 97: A sleep center manager wants to evaluate whether a new patient education program improved CPAP adherence. Which study design is MOST appropriate?

Pre- and post-intervention comparison with defined adherence metrics (Correct answer)
Review of equipment vendor sales data
Informal staff opinion survey
Observation of a single patient's compliance

Correct answer: Pre- and post-intervention comparison with defined adherence metrics

A pre- and post-intervention design with defined metrics allows objective measurement of whether the program produced the desired change in adherence.

Question 98: During a PSG, a patient's airflow signal shows a crescendo-decrescendo pattern lasting 60 seconds cycling every 90 seconds. What is the most likely scoring?

Central sleep apnea with Cheyne-Stokes breathing pattern (Correct answer)
Mixed apnea series
Obstructive apnea cluster
Hypopnea with periodic limb movements

Correct answer: Central sleep apnea with Cheyne-Stokes breathing pattern

The waxing-and-waning crescendo-decrescendo breathing with a cycle length typically 45–90 seconds is the hallmark of Cheyne-Stokes breathing.

Question 99: Which EEG feature is required to score an epoch as stage N2 sleep?

Continuous delta activity comprising >20% of the epoch
Presence of sawtooth waves
Alpha activity replaced by theta activity only
At least one K-complex or sleep spindle in the absence of arousal (Correct answer)

Correct answer: At least one K-complex or sleep spindle in the absence of arousal

Stage N2 requires one or more K-complexes or sleep spindles not associated with arousal, in the absence of sufficient slow-wave activity for N3.

Question 100: In a PSG report, the respiratory disturbance index (RDI) differs from AHI because it also includes:

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

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 101: What is the role of benchmarking in establishing best practices?

Matching exactly what competitors are doing
Setting the lowest acceptable standard for performance
Comparing performance against top performers to identify improvement opportunities (Correct answer)
Eliminating all practices that differ from the industry average

Correct answer: Comparing performance against top performers to identify improvement opportunities

Benchmarking involves comparing your performance against top performers or industry leaders to identify gaps and opportunities for improvement.

Question 102: What is the minimum AHI threshold for diagnosing moderate obstructive sleep apnea per AASM criteria?

5 events/hour
50 events/hour
30 events/hour
15 events/hour (Correct answer)

Correct answer: 15 events/hour

Moderate OSA is defined as an AHI of 15–29 events per hour per AASM classification guidelines.

Question 103: Which communication model is most effective for ensuring accurate information transfer during shift handoffs in a sleep laboratory?

Email summaries sent after the shift ends
One-way verbal communication only
SBAR (Situation, Background, Assessment, Recommendation) (Correct answer)
Informal text messages between outgoing and incoming staff

Correct answer: SBAR (Situation, Background, Assessment, Recommendation)

SBAR is a standardized, evidence-based handoff tool that ensures critical patient information is communicated clearly and completely.

Question 104: A sleep center manager needs to justify a budget request for an additional polysomnographic technologist. Which data is most persuasive to present to administration?

Overtime costs, patient volume trends, and quality outcome metrics (Correct answer)
A list of competitor staffing ratios only
The educational credentials of current staff members
Personal staff satisfaction anecdotes

Correct answer: Overtime costs, patient volume trends, and quality outcome metrics

Quantitative data linking current staffing to financial cost (overtime) and quality outcomes provides an objective, administration-focused business case.

Question 105: What EEG characteristic distinguishes Stage N3 sleep from Stage N2 sleep?

Alpha intrusions
High-amplitude slow waves occupying ≥20% of epoch (Correct answer)
Presence of sleep spindles
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 106: The oxygen desaturation index (ODI) as measured during PSG typically counts events where SpO2 drops by at least:

3% from baseline
4% from baseline (Correct answer)
2% from baseline
5% from baseline

Correct answer: 4% from baseline

The most widely used definition of ODI counts SpO2 drops ≥4% from the preceding baseline, though some protocols use 3%.

Question 107: Why is stakeholder buy-in important for strategic implementation?

Because it is a legal requirement in all organizations
Because it eliminates the need for project management
Because successful implementation requires support and cooperation from those affected (Correct answer)
Because it generates positive media coverage

Correct answer: Because successful implementation requires support and cooperation from those affected

Stakeholder buy-in is critical because successful implementation depends on the active support, cooperation, and engagement of the people who will be affected by or involved in executing the strategy.

Question 108: How long should professional records typically be retained?

Until the filing cabinet is full
Only until the next audit is completed
According to applicable laws, regulations, and organizational retention policies (Correct answer)
For exactly one calendar year

Correct answer: According to applicable laws, regulations, and organizational retention policies

Record retention periods are determined by applicable laws, regulations, professional standards, and organizational policies, which vary by document type and jurisdiction.

Question 109: A patient with Cheyne-Stokes respiration most commonly has which underlying condition?

Congestive heart failure (Correct answer)
Obstructive sleep apnea
Hypothyroidism
Chronic obstructive pulmonary disease

Correct answer: Congestive heart failure

Cheyne-Stokes respiration is most commonly associated with congestive heart failure due to prolonged circulation time causing oscillating ventilatory drive.

Question 110: State licensure laws for polysomnographic technologists are primarily governed by:

The AASM accreditation body
The BRPT at the federal level
CMS through Medicare conditions
Individual state legislatures and licensing boards (Correct answer)

Correct answer: Individual state legislatures and licensing boards

Polysomnographic technologist licensure is regulated at the state level, and requirements vary significantly from state to state.

Question 111: What does 'PDSA cycle' stand for in the context of sleep lab quality improvement?

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

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

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

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

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

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 114: What distinguishes inherent risk from residual risk?

There is no meaningful difference between them
Inherent risk exists before controls; residual risk remains after controls are applied (Correct answer)
Inherent risk is internal; residual risk is external
Inherent risk is financial; residual risk is operational

Correct answer: Inherent risk exists before controls; residual risk remains after controls are applied

Inherent risk is the level of risk present before any controls are implemented, while residual risk is the level that remains after controls and mitigations are applied.

Question 115: According to AASM rules, an epoch is scored Stage Wake (W) when alpha activity occupies what proportion of the epoch?

≥30%
≥50% (Correct answer)
≥20%
≥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 116: In digital PSG systems, what does the term 'common mode rejection ratio' (CMRR) refer to?

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

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 117: Periodic limb movements of sleep (PLMS) are scored when individual limb movements last:

1–5 seconds
1–10 seconds
0.5–5 seconds
0.5–10 seconds (Correct answer)

Correct answer: 0.5–10 seconds

AASM criteria define individual PLMS as lasting 0.5–10 seconds, occurring in a series of ≥4 movements separated by 5–90 second intervals.

Question 118: A technician notices an artifact that resembles an apnea event. The correct documentation approach is to:

Note the artifact in technician comments and exclude the segment from respiratory scoring (Correct answer)
Mark it as hypopnea since the signal is unclear
Leave it unscored and undocumented
Score it as an apnea to be conservative

Correct answer: Note the artifact in technician comments and exclude the segment from respiratory scoring

Artifactual signals that mimic respiratory events must be flagged in comments and excluded from scoring to prevent false AHI elevation.

Question 119: Before scheduling a Multiple Sleep Latency Test (MSLT) to evaluate for narcolepsy, what minimum overnight sleep requirement must be met on the prior night's PSG per AASM protocol?

At least 6 hours of total sleep time (Correct answer)
At least 4 hours of total sleep time
No minimum sleep time is required
At least 7 hours of total sleep time

Correct answer: At least 6 hours of total sleep time

AASM MSLT protocol requires that the patient obtain at least 6 hours of sleep on the prior night's PSG to ensure the MSLT results are valid. Insufficient overnight sleep can produce false-positive sleep-onset REM periods (SOREMPs) and spuriously shortened sleep latencies, mimicking narcolepsy.

Question 120: 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?

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

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 121: How should negative or difficult information be communicated to stakeholders?

Only when specifically asked about it
Buried within positive information to minimize impact
Delayed until the situation has fully resolved
Honestly and promptly, with proposed solutions or mitigation steps (Correct answer)

Correct answer: Honestly and promptly, with proposed solutions or mitigation steps

Negative information should be communicated honestly and promptly, accompanied by proposed solutions or mitigation plans to maintain trust and enable timely action.

Question 122: A movement artifact on the EEG that is most likely caused by the patient's heartbeat is called:

60 Hz artifact
Sweat artifact
Ballistocardiogram artifact (Correct answer)
Electrode pop 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 123: Stage N1 sleep is best characterized by which EEG finding?

Frequent K-complexes and spindles
Predominant alpha activity
High-amplitude delta waves
Low-voltage mixed-frequency activity with vertex sharp waves (Correct answer)

Correct answer: Low-voltage mixed-frequency activity with vertex sharp waves

N1 is defined by low-voltage mixed-frequency EEG (2–7 Hz), often with vertex sharp waves and reduction of alpha activity.

Question 124: During REM sleep, which of the following is NOT typically observed?

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

Correct answer: Sleep spindles

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

Question 125: 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 < 92%
SpO2 < 95%
SpO2 < 85%

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 126: An RPSGT discovers that the lab's calibration records have been altered. The appropriate first step is:

Report the discrepancy to the lab director or compliance officer (Correct answer)
Continue conducting studies until management notices on their own
Alter the records again to reflect the correct values
Ignore it because calibration errors are a minor technical matter

Correct answer: Report the discrepancy to the lab director or compliance officer

Falsified records are a serious compliance and patient safety issue that must be reported immediately to the appropriate authority.

Question 127: The Respiratory Disturbance Index (RDI) differs from the AHI in documentation by including:

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

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

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

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 129: 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
Cover for the colleague to avoid workplace conflict
Address concerns through proper channels such as a supervisor or employee assistance program (Correct answer)
Confront the colleague publicly during a shift

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

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

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 131: Which artifact is characterized by rhythmic, high-frequency bursts on EEG channels that correlate with the pulse rate?

Pulse artifact (Correct answer)
ECG artifact
Electrode pop artifact
Sweat artifact

Correct answer: Pulse artifact

Pulse artifact appears as rhythmic slow waves or spikes on EEG caused by an electrode placed over a pulsating blood vessel.

Question 132: Sawtooth waves are a characteristic EEG feature associated with which sleep stage?

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

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 133: 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 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
To slightly reduce pressure during exhalation to improve patient comfort and adherence (Correct answer)

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 134: A state law requires that sleep study results be reported to a state driver's licensing agency for patients diagnosed with severe OSA. Under HIPAA, this disclosure is:

Prohibited unless the patient is a commercial truck driver
Prohibited because it lacks patient authorization
Only allowed with written patient consent
Permissible as a required disclosure mandated by law (Correct answer)

Correct answer: Permissible as a required disclosure mandated by law

HIPAA permits disclosures required by law, including mandatory state reporting requirements, without patient authorization.

Question 135: 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 standardized split-night conversion protocol with clear, objective criteria and a decision flowchart (Correct answer)
A new patient consent form specific to split-night studies
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 136: Which of the following BEST describes the purpose of inter-rater reliability testing in a sleep lab?

To track the number of patient complaints per quarter
To compare a lab's equipment to manufacturer specifications
To measure agreement between technologists or scorers on the same study (Correct answer)
To ensure patients receive consistent billing

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

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

Question 137: When prioritizing strategic initiatives for a sleep center with limited resources, which framework helps rank projects by impact and feasibility?

Technologist scheduling rotation
Priority matrix (effort-impact grid) (Correct answer)
HIPAA compliance checklist
SOAP note format

Correct answer: Priority matrix (effort-impact grid)

A priority matrix plots initiatives by effort required versus expected impact, helping leadership focus limited resources on high-value, achievable projects.

Question 138: The international 10-20 electrode placement system derives its name from the fact that electrodes are placed at intervals of:

10 mm and 20 mm apart
10 Hz and 20 Hz frequency bands
10% and 20% of skull circumference distances (Correct answer)
10 and 20 microvolts apart

Correct answer: 10% and 20% of skull circumference distances

The 10-20 system spaces electrodes at 10% and 20% intervals of the total skull circumference measured in each plane.

Question 139: When evaluating team performance after a quality improvement project in a sleep center, which framework provides the most structured post-project review?

Informal staff discussion with no documentation
A single satisfaction survey administered once
Plan-Do-Study-Act (PDSA) cycle with post-implementation data review (Correct answer)
SWOT analysis applied before project start only

Correct answer: Plan-Do-Study-Act (PDSA) cycle with post-implementation data review

The PDSA cycle's 'Study' and 'Act' phases provide a structured, data-driven method for evaluating outcomes and determining next steps after a quality improvement project.

Question 140: What is the minimum number of continuing education credits an RPSGT must earn per recertification cycle?

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

Correct answer: 30 CECs

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

Question 141: During CPAP titration, persistent flow limitation without discrete apneas or hypopneas is best addressed by:

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

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

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

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

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

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 144: The AASM requires that a board-certified sleep medicine physician provide what level of oversight for an accredited sleep center?

Annual review of equipment calibration records only
Medical direction with defined responsibilities for quality assurance and patient care (Correct answer)
Periodic consultation when problems arise
Remote supervision via telemedicine is not permitted

Correct answer: Medical direction with defined responsibilities for quality assurance and patient care

AASM accreditation requires a board-certified sleep medicine physician to serve as medical director with clear responsibilities for clinical oversight and quality assurance.

Question 145: Which principle of adult learning (andragogy) is most important to apply when designing in-service training for experienced RPSGT staff?

Present content in a fixed sequence regardless of learner background
Connect new information to learners' existing clinical experience and immediate job relevance (Correct answer)
Avoid allowing learners to ask questions to keep sessions on schedule
Use only lecture-based delivery to maintain consistency

Correct answer: Connect new information to learners' existing clinical experience and immediate job relevance

Adult learners are self-directed and motivated by content that is immediately applicable to their real-world practice.

Question 146: A patient has 45 minutes of REM sleep in 6.5 hours of TST. What is the REM sleep percentage?

13.8% (Correct answer)
11.5%
15.4%
9.8%

Correct answer: 13.8%

REM % = (45 min ÷ 390 min) × 100 = 11.5%; however 45/390 = 0.1154, rounding to 11.5% — wait, 45/390=0.1154=11.5%. Select 11.5%.

Question 147: During REM sleep, which finding would prompt a technologist to flag for possible REM sleep behavior disorder?

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

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 148: During pre-study biocalibrations, the technologist asks the patient to look left and then right several times. Which recording channel is this instruction designed to verify?

EEG — specifically the occipital electrodes
Chin submental EMG
ECG (electrocardiography)
EOG (electrooculography) channels (Correct answer)

Correct answer: EOG (electrooculography) channels

Horizontal eye movements produce large, out-of-phase deflections in the EOG channels (E1-M2 and E2-M1). Asking the patient to look side-to-side confirms that both EOG electrodes are properly placed and recording, and that the polarity (phase reversal) is correct. This is critical for distinguishing eye movements during REM and wake.

Question 149: A technologist notes chin EMG bursts lasting 0.1–0.5 seconds occurring in REM sleep. These are best described as:

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

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 150: 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)
Presence of sleep spindles
Chin EMG amplitude exceeding a set threshold
Eye blink rate exceeding 3 per minute

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

Records are placed in standard recycling bins after 7 years
Records are deleted digitally but paper copies may be discarded normally
PHI is rendered unreadable through shredding, burning, or pulping (Correct answer)
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 152: Sleep efficiency is best defined as:

TST divided by total recording time × 100
TST divided by time in bed × 100 (Correct answer)
NREM time divided by TST × 100
REM time divided by total recording time

Correct answer: TST divided by time in bed × 100

Sleep efficiency = (TST ÷ time in bed) × 100, where time in bed runs from lights out to lights on.

Question 153: Which electrode impedance threshold must be met before beginning a PSG recording according to best practice?

Below 10 kΩ (Correct answer)
Below 25 kΩ
Below 50 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 154: When scoring respiratory effort-related arousals (RERAs), documentation must include:

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

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

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

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 156: 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
Increase CPAP pressure to reduce air leaks
Add supplemental oxygen to the circuit
Reduce CPAP pressure or switch to BiPAP to lower mean airway pressure (Correct answer)

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 157: When an AASM-required 10-minute inter-scorer reliability check is performed, the acceptable minimum agreement for sleep staging is:

70%
95%
80% epoch-by-epoch agreement (Correct answer)
60%

Correct answer: 80% epoch-by-epoch agreement

AASM accreditation standards require a minimum of 80% epoch-by-epoch agreement between scorers on sleep staging during inter-scorer reliability assessments.

Question 158: Sleep spindles are generated primarily by thalamo-cortical circuits and are typically recorded at maximum amplitude over which scalp region?

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

Correct answer: Central (C3, C4)

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

Question 159: A technologist notices 60 Hz artifact on multiple EEG channels. Which action should be performed FIRST?

Wake the patient and reapply all electrodes
Identify and re-prep electrodes with high impedance readings (Correct answer)
Apply a 60 Hz notch filter and continue recording
Reboot the acquisition software

Correct answer: Identify and re-prep electrodes with high impedance readings

High electrode impedance is the most common cause of 60 Hz (electrical interference) artifact; correcting impedance at affected electrodes should be the first step.

Question 160: In the context of RPSGT risk management, what does 'scope of practice' primarily protect?

Both the patient and the technologist by defining the limits of safe and authorized practice (Correct answer)
The technologist's right to prescribe medications
The sleep lab's billing practices
The technologist's ability to interpret polysomnographic studies independently

Correct answer: Both the patient and the technologist by defining the limits of safe and authorized practice

Scope of practice defines what a credentialed professional is trained and authorized to do, protecting patients from unqualified interventions and technologists from liability.

Question 161: When should established methodologies be reconsidered?

Whenever a new employee joins the organization
Never, once established they should remain permanent
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 162: In a patient with suspected upper airway resistance syndrome (UARS), which finding differentiates it from simple snoring?

Esophageal pressure swings with EEG arousals but no apneas (Correct answer)
AHI greater than 5
Oxygen desaturation below 88%
Presence of hypopneas lasting over 30 seconds

Correct answer: Esophageal pressure swings with EEG arousals but no apneas

UARS is characterized by increased respiratory effort detected via esophageal manometry causing arousals without discrete apneas or significant desaturations.

Question 163: Which document guides the ethical conduct expected of all BRPT credential holders?

The American Nurses Association Code of Ethics
The AASM Clinical Practice Guidelines
The BRPT Standards of Conduct (Correct answer)
The Joint Commission Accreditation Manual

Correct answer: The BRPT Standards of Conduct

The BRPT Standards of Conduct outlines the ethical obligations specifically required of RPSGT credential holders.

Question 164: What is the frequency range of slow wave activity (delta waves) as defined by the AASM Scoring Manual for N3 scoring?

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

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

Beneficence
Fidelity
Justice
Autonomy (Correct answer)

Correct answer: Autonomy

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

Question 166: Which of the following best describes the 'two-process model' of sleep regulation?

Two brain regions — the SCN and the pineal gland — independently control sleep timing
Sleep quality depends on two factors: sleep duration and sleep onset latency
Sleep is regulated by the interaction of circadian rhythms (Process C) and homeostatic sleep drive (Process S) (Correct answer)
Sleep is governed by REM pressure and NREM pressure alternating cyclically

Correct answer: Sleep is regulated by the interaction of circadian rhythms (Process C) and homeostatic sleep drive (Process S)

The two-process model (Borbély) describes sleep as regulated by the circadian clock (Process C) and homeostatic sleep pressure that builds during wakefulness (Process S).

Question 167: An EEG arousal during PSG is scored when there is an abrupt EEG frequency shift lasting at least:

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

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

Sawtooth waves preceding REM bursts
A burst of 12-14 Hz waveforms lasting ≥0.5 s
High-voltage slow waves >75 µV lasting ≥2 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 169: What is the function of the chin (submental) EMG channel in a standard PSG recording?

Detect bruxism only
Assess limb movement during sleep
Evaluate muscle tone to help identify REM sleep (Correct answer)
Measure respiratory effort

Correct answer: Evaluate muscle tone to help identify REM sleep

Submental EMG monitors chin muscle tone; reduced or absent tone during REM helps confirm REM sleep staging.

Question 170: What is the primary objective of RPSGT Exam certification?

To replace formal education requirements
To provide tax benefits to employers
To validate professional competence in rpsgt (Correct answer)
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 171: An RPSGT notices that a colleague has been documenting false artifact corrections in study records. What is the most appropriate action?

Confront the colleague publicly in front of patients
Ignore it as long as your own records are accurate
Report the concern through the appropriate chain of command or compliance channel (Correct answer)
Correct the records yourself without mentioning it to anyone

Correct answer: Report the concern through the appropriate chain of command or compliance channel

Falsifying medical records is an ethical and legal violation that must be reported through proper channels.

Question 172: What is the typical frequency range for sleep spindles used when scoring Stage N2?

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

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 173: A respiratory effort-related arousal (RERA) is characterized by which of the following?

A sequence of breaths lasting ≥10 seconds with flattened inspiratory airflow leading to arousal (Correct answer)
Cessation of airflow for ≥10 seconds without respiratory effort
A ≥3% oxygen desaturation following an apnea
Paradoxical breathing during NREM sleep

Correct answer: A sequence of breaths lasting ≥10 seconds with flattened inspiratory airflow leading to arousal

A RERA is a sequence of breaths ≥10 seconds showing flattened inspiratory airflow or increasing respiratory effort culminating in an arousal, not meeting apnea or hypopnea criteria.

Question 174: In polysomnography, what does the term 'montage' refer to?

The specific combination and arrangement of recording channels (Correct answer)
The order in which patients are scheduled
The paper speed of the PSG tracing
The calibration sequence performed before recording

Correct answer: The specific combination and arrangement of recording channels

A montage is the defined set of channels and their derivations used during a PSG recording.

Question 175: Piezoelectric effort belts used in PSG measure respiratory effort by detecting:

Pressure changes transmitted through the belt
Infrared light absorption by chest wall
Mechanical strain causing voltage changes (Correct answer)
Changes in thoracic electrical impedance

Correct answer: Mechanical strain causing voltage changes

Piezoelectric belts generate a voltage proportional to mechanical strain (stretching/compression) from thoracoabdominal movement.

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

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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