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Question 1

Score: 0/0

Which scoring rule applies when an epoch contains both N2 features and N3 features?

Always score as N2

Always score as N3

Score as the stage that occupies the majority of the epoch

Score as REM

to track

2026 Statistics

Key Facts: CPSGT Exam

100

Exam Questions

BRPT

2 hours

Exam Time

BRPT

$200-$300

Exam Fee

BRPT 2026

Entry-level

Certification Level

BRPT (vs advanced RPSGT)

30 sec

Standard Epoch Length

AASM scoring manual

10-20

Electrode System

International standard

The CPSGT exam has 100 questions with a 2-hour time limit and costs $200-$300. It is the entry-level sleep technician credential from BRPT, designed for technicians beginning their career in polysomnography. The exam covers EEG/EOG/EMG electrode placement, AASM sleep stage scoring criteria, respiratory event identification, PAP titration protocols, patient safety, and artifact recognition. The advanced RPSGT requires more education and experience.

Sample CPSGT Practice Questions

Try these sample questions to test your CPSGT exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which brain wave pattern is characteristic of Stage N2 sleep?

A.Alpha waves

B.Sleep spindles and K-complexes

C.Delta waves comprising more than 20% of the epoch

D.Rapid eye movements with low-voltage mixed-frequency EEG

Explanation: Stage N2 sleep is characterized by the presence of sleep spindles (12-14 Hz bursts lasting 0.5-2 seconds) and K-complexes (sharp negative deflection followed by a positive component). These are the defining features that distinguish N2 from other sleep stages. Alpha waves are associated with relaxed wakefulness, delta waves define N3 sleep, and rapid eye movements with low-voltage mixed-frequency activity characterize REM sleep.

2What is the standard paper speed (epoch length) used for scoring polysomnography according to AASM guidelines?

A.10 seconds per page

B.30 seconds per page

C.60 seconds per page

D.120 seconds per page

Explanation: The AASM Manual for the Scoring of Sleep and Associated Events specifies a 30-second epoch as the standard unit for sleep stage scoring. Each page of the polysomnogram represents 30 seconds of recorded data. This standardized epoch length allows consistent scoring across laboratories and facilitates comparison of sleep study results. Shorter epochs (10 seconds) may be used for detailed event analysis, but 30 seconds is the standard for stage scoring.

3Which electrode placement system is used for EEG monitoring during polysomnography?

A.12-lead ECG system

B.International 10-20 system

C.Holter monitor placement

D.EMG electrode grid

Explanation: The International 10-20 system is the standardized method for EEG electrode placement used in polysomnography. Electrode positions are determined by measuring 10% and 20% of the distance between skull landmarks (nasion, inion, preauricular points). For routine PSG, AASM recommends frontal (F3, F4), central (C3, C4), and occipital (O1, O2) derivations with mastoid references (M1, M2). This standardized system ensures reproducible electrode placement across laboratories.

4During a sleep study, a patient's oxygen saturation drops to 82% during an observed apneic event. What is the MOST appropriate initial action by the sleep technician?

A.Wake the patient and end the study

B.Document the desaturation and continue monitoring

C.Position the patient on their side and provide supplemental oxygen if the desaturation persists

D.Increase the room temperature

Explanation: When a patient experiences significant oxygen desaturation (below 85-88% depending on facility protocol), the technician should first attempt positional change (lateral position) to reduce airway collapse and provide supplemental oxygen if the desaturation persists or worsens. Patient safety is the priority, but ending the study prematurely should be a last resort. Simply documenting without intervention is inappropriate for this level of desaturation. The attending physician's orders and facility protocols guide specific thresholds for intervention.

5Which sensor is used to detect airflow during polysomnography?

A.Pulse oximeter

B.Oronasal thermal sensor and nasal pressure transducer

C.Piezoelectric belt

D.Snore microphone

Explanation: AASM guidelines recommend using both an oronasal thermal sensor (thermistor or thermocouple) for detecting apneas and a nasal pressure transducer for detecting hypopneas. The thermal sensor detects the temperature difference between inspired and expired air, while the nasal pressure transducer provides a more sensitive measure of airflow reduction. Together, they provide comprehensive airflow monitoring. Pulse oximeters measure oxygen saturation, piezoelectric belts measure respiratory effort, and snore microphones detect snoring sounds.

6According to AASM criteria, an obstructive apnea is defined as a cessation or near-cessation of airflow lasting at least how many seconds?

A.5 seconds

B.10 seconds

C.20 seconds

D.30 seconds

Explanation: According to AASM scoring criteria, an obstructive apnea is scored when there is a drop in the peak thermal sensor signal by 90% or more of baseline for at least 10 seconds, with continued or increased respiratory effort throughout the event. The 10-second minimum duration requirement applies to all types of apneas (obstructive, central, and mixed). Events shorter than 10 seconds are not scored as apneas regardless of the degree of airflow reduction.

7What is the PRIMARY purpose of the electromyogram (EMG) chin electrode during polysomnography?

A.To measure heart rate

B.To detect muscle tone changes for REM sleep identification

C.To monitor respiratory effort

D.To detect eye movements

Explanation: The chin (submental/mentalis) EMG is primarily used to detect muscle tone changes that help identify REM sleep, which is characterized by muscle atonia (absence of tonic muscle activity). During non-REM sleep, muscle tone is present but reduced from wakefulness. The contrast between tonic EMG activity in non-REM and atonia in REM is a key distinguishing feature. Heart rate is measured by ECG, respiratory effort by chest/abdomen belts, and eye movements by EOG electrodes.

8Which CPAP pressure titration protocol step is appropriate when obstructive apneas persist at the current pressure setting?

A.Decrease the pressure by 2 cmH2O

B.Increase the pressure by at least 1 cmH2O with a minimum wait of 5 minutes

C.Keep the pressure the same and wait 30 minutes

D.Remove the mask and end the titration

Explanation: According to AASM CPAP titration guidelines, when obstructive apneas persist, the pressure should be increased by at least 1 cmH2O with a minimum 5-minute interval between increases. The goal is to find the minimum effective pressure that eliminates apneas, hypopneas, respiratory effort-related arousals (RERAs), and snoring. Decreasing pressure would worsen the obstruction, waiting without adjustment is ineffective, and ending the study prematurely fails to achieve the therapeutic goal.

9Which sleep disorder is characterized by excessive daytime sleepiness, cataplexy, sleep paralysis, and hypnagogic hallucinations?

A.Obstructive sleep apnea

B.Insomnia

C.Narcolepsy type 1

D.Restless legs syndrome

Explanation: Narcolepsy type 1 (previously narcolepsy with cataplexy) is characterized by the classic tetrad: excessive daytime sleepiness, cataplexy (sudden loss of muscle tone triggered by emotions), sleep paralysis (inability to move during sleep-wake transitions), and hypnagogic hallucinations (vivid dream-like experiences at sleep onset). It is caused by loss of hypocretin/orexin-producing neurons in the hypothalamus. OSA causes sleepiness but with different pathophysiology, insomnia involves difficulty sleeping, and RLS involves uncomfortable leg sensations.

10What is the correct electrode placement for electrooculography (EOG) during polysomnography?

A.Both electrodes above the right eye

B.E1 placed 1 cm below the left outer canthus and E2 placed 1 cm above the right outer canthus, both referenced to M2

C.Both electrodes on the chin

D.Electrodes placed on the earlobes only

Explanation: AASM-recommended EOG placement positions E1 at 1 cm below the left outer canthus (slightly lateral) and E2 at 1 cm above the right outer canthus (slightly lateral). This offset placement allows detection of conjugate eye movements: when the eyes move together, both electrodes show deflections in opposite polarity, distinguishing true eye movements from artifact. Both electrodes are referenced to the contralateral mastoid (M2 for left, M1 for right in some montages).

About the CPSGT Exam

The CPSGT exam is the entry-level polysomnographic technician certification offered by BRPT. It validates foundational competency in sleep study setup, electrode placement using the 10-20 system, AASM scoring rules for sleep stages and respiratory events, CPAP/BiPAP titration, patient care, safety protocols, and polysomnography equipment operation. The CPSGT serves as a stepping stone to the advanced RPSGT credential.

Assessment

100 multiple-choice questions (scored and pretest items)

Time Limit

2 hours

Passing Score

Scaled passing score (criterion-referenced)

Exam Fee

$200-$300 (BRPT (Board of Registered Polysomnographic Technologists))

CPSGT Exam Content Outline

25%

Polysomnography Setup and Equipment

EEG, EOG, EMG electrode application, sensor placement, impedance management, bio-calibration, filter settings, artifact identification

20%

Electrode Placement (10-20 System)

International 10-20 system landmarks, EEG derivations, EOG placement, chin and leg EMG placement, reference and ground electrodes

25%

Scoring Rules and AASM Manual

Sleep stage criteria (W, N1, N2, N3, REM), respiratory event scoring (apnea, hypopnea, RERA), arousal rules, PLM scoring, and sleep parameters

15%

PAP Titration

CPAP, BiPAP, and APAP titration protocols, mask selection, pressure adjustment algorithms, split-night criteria, troubleshooting

15%

Patient Care and Safety

Patient education, emergency protocols, electrical safety, infection control, HIPAA compliance, documentation, and pediatric considerations

How to Pass the CPSGT Exam

What You Need to Know

Passing score: Scaled passing score (criterion-referenced)
Assessment: 100 multiple-choice questions (scored and pretest items)
Time limit: 2 hours
Exam fee: $200-$300

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

CPSGT Study Tips from Top Performers

1Memorize the AASM sleep stage scoring criteria: alpha for W, low-amplitude mixed-frequency for N1, spindles/K-complexes for N2, 20% delta for N3, rapid eye movements with atonia for REM

2Master the International 10-20 system electrode placement landmarks and standard PSG derivations (F, C, O referenced to M1/M2)

3Know the AASM definitions for apnea (90% reduction, 10+ seconds), hypopnea (30% reduction, 10+ seconds with 3% desat or arousal), and RERA

4Study CPAP titration protocols including starting pressure, increment size, wait intervals, and maximum pressure limits

5Learn to identify common PSG artifacts: 60 Hz, ECG, sweat, electrode pop, and muscle artifact

6Understand the standard filter settings, sensitivity, and sampling rates recommended by AASM for each channel

7Review patient safety protocols including electrical safety, emergency response, and infection control procedures

8Know normal sleep architecture values: sleep efficiency >85%, REM 20-25%, N3 distribution in early cycles, 90-120 minute cycle length

Frequently Asked Questions

What is the CPSGT certification?

CPSGT (Certified Polysomnographic Technician) is the entry-level credential offered by BRPT for sleep technicians. It validates foundational knowledge and skills in polysomnography setup, sleep stage scoring, respiratory event identification, PAP titration, and patient care. The CPSGT demonstrates competency for technicians beginning their career in sleep medicine.

How does CPSGT differ from RPSGT?

CPSGT is the entry-level credential while RPSGT (Registered Polysomnographic Technologist) is the advanced certification. RPSGT has more questions (175 vs 100), a longer time limit (3 hours vs 2 hours), higher eligibility requirements, and tests more advanced clinical knowledge. CPSGT serves as a stepping stone toward RPSGT, which is considered the gold standard in sleep technology.

What are the eligibility requirements for CPSGT?

CPSGT eligibility requirements include: 1) High school diploma or equivalent, 2) A minimum number of clinical hours in polysomnography under supervision, and 3) Current BLS/CPR certification. Specific pathway requirements are detailed on the BRPT website. The CPSGT has lower prerequisites than the RPSGT, making it accessible for entry-level technicians.

How many questions are on the CPSGT exam?

The CPSGT exam consists of 100 multiple-choice questions, including scored items and pretest (unscored) questions. You have 2 hours to complete the exam. The exam is administered via computer-based testing at Pearson VUE testing centers.

What topics are covered on the CPSGT exam?

The CPSGT exam covers polysomnography setup and equipment operation, electrode placement using the International 10-20 system, AASM sleep staging rules (W, N1, N2, N3, REM), respiratory event scoring (apneas, hypopneas, RERAs), PAP titration protocols, periodic limb movement scoring, patient care and safety, and artifact recognition.

How should I prepare for the CPSGT exam?

Effective preparation includes: 1) Studying the AASM Manual for the Scoring of Sleep and Associated Events, 2) Mastering the International 10-20 electrode placement system, 3) Practicing sleep stage identification from epoch examples, 4) Understanding CPAP/BiPAP titration protocols and pressure adjustment algorithms, 5) Reviewing patient safety and emergency procedures, and 6) Completing practice questions across all content domains.

Can I pursue RPSGT after passing CPSGT?

Yes, CPSGT holders can pursue the RPSGT credential after gaining additional education and clinical experience. BRPT offers multiple eligibility pathways for RPSGT including CAAHEP-accredited programs, STAR pathways, and experience-based routes. The CPSGT provides a solid foundation for advancing to RPSGT-level competency.