10 exam-style questions with answers and explanations, straight from our 1,056-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The CPSGT exam has 75 questions and runs 2 hours.
These 10 free CPSGT questions are organized by exam domain, so you can see how each part of the Certified Polysomnographic Technician (CPSGT) blueprint is tested. Reveal the answer and explanation under each question.
A technician is assembling the montage for a diagnostic study. Which sensor is RECOMMENDED for the detection of apneas?
Correct answer: A - Oronasal thermal sensor, which registers changes in expired air temperature
Midway through a recording, thick uniform high-frequency activity appears across all EEG channels. The FIRST corrective action should be to:
Correct answer: C - Re-prep the electrode sites to lower and match the impedances
During physiologic calibrations, the E1 and E2 channels deflect in the same direction when the patient looks left and right. This MOST likely indicates:
Correct answer: C - The EOG electrodes are placed or referenced incorrectly
A patient arrives for a scheduled MSLT. The technician notes the patient did not undergo an overnight polysomnogram the previous night. The MOST appropriate action is to:
Correct answer: A - Contact the ordering physician before proceeding with the study
A study records 480 minutes of total recording time and 360 minutes of total sleep time. During the study, 54 apneas and 36 hypopneas are scored. The apnea-hypopnea index is:
Correct answer: B - 15.0
A 4-year-old demonstrates a 90% reduction in oronasal thermal airflow lasting the duration of 3 breaths, with continued respiratory effort throughout. This event is scored as:
Correct answer: D - Obstructive apnea, since effort persisted through the event
An arousal is being scored during an epoch of stage R. In addition to an abrupt EEG frequency shift lasting at least 3 seconds preceded by 10 seconds of stable sleep, what is ALSO required?
Correct answer: B - A concurrent increase in chin EMG lasting at least 1 second
An epoch contains low-amplitude mixed-frequency EEG, rapid eye movements, and the lowest chin EMG tone recorded during the study. This epoch is scored as:
Correct answer: B - Stage R
During CPAP titration at 14 cm H2O, an adult patient's obstructive apneas have resolved but central apneas now appear repetitively. The MOST appropriate technician action is to:
Correct answer: A - Stop increasing the pressure and notify the physician per protocol
A patient on nasal CPAP reports a dry mouth on waking, and the recording shows an elevated leak signal with recurring arousals. The BEST initial intervention is to:
Correct answer: D - Apply a chin strap or transition the patient to an oronasal mask
The full bank has 1,046 more CPSGT questions with explanations.
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