Page 1 of 228
POLYSOMNOGRAPHIC TECHNOLOGIST
(PSG) ACTUAL EXAM 2026/2027 COMPLETE
ACCURATE EXAM REAL QUESTIONS WITH
WELL ELABORATED ANSWERS. (100%
CORRECT VERIFIED SOLUTIONS)
1. A 45-year-old patient is scheduled for a baseline
polysomnogram. According to the AASM manual, what is
the correct location for the F4 electrode?
• A) 10% of the nasion-inion distance above the nasion,
20% of the interaural distance right of midline
• B) 30% of the nasion-inion distance above the nasion,
10% of the interaural distance right of midline
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• C) 20% of the nasion-inion distance above the inion, 20%
of the interaural distance left of midline
• D) 10% of the nasion-inion distance above the inion, 30%
of the interaural distance right of midline
Correct Answer: A
Rationale: The 10-20 system places F4 at 10% above the
nasion (along the nasion-inion line) and 20% to the right of
midline (interaural distance). F4 is a right frontal electrode.
Options B, C, and D describe Fz, O2, or incorrect placements.
2. A patient with a known seizure disorder presents for a
split-night PSG. Which additional electrode montage must
be added to extend the study to a full EEG?
• A) The entire 10-20 system with a minimum of 25
electrodes
• B) A reduced montage including F3, F4, C3, C4, O1, O2,
T3, T4
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• C) Bilateral ear leads only (A1, A2) with a ground
• D) Nasopharyngeal leads only
Correct Answer: B
Rationale: For suspected nocturnal seizures, the AASM
recommends an expanded EEG montage (minimum 8 channels:
F3, F4, C3, C4, O1, O2, T3, T4) referenced to mastoids. Full
10-20 (25 electrodes) is excessive for routine PSG.
Nasopharyngeal leads are invasive and rarely used.
3. (Scenario) A 220 lb patient with a thick neck and beard
arrives for a CPAP titration study. After attempting three
different nasal masks, the leak is >40 L/min. What is the
MOST appropriate next step according to NYS practice
standards?
• A) Cancel the study and reschedule for a home sleep test
• B) Switch to a full-face mask and perform a leak check at
15 cm H2O
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• C) Increase CPAP pressure to 20 cm H2O to force a seal
• D) Apply tape over the patient's mouth and continue with
nasal mask
Correct Answer: B
Rationale: A full-face mask bypasses nasal/oral leakage.
NYS protocols require leak <24 L/min for diagnostic accuracy.
Option A denies necessary care. Option C increases discomfort
without solving leak. Option D is unsafe (aspiration risk).
4. According to New York State Education Law, which of the
following tasks can a Polysomnographic Technologist
perform INDEPENDENTLY without a physician on-site?
• A) Titrating CPAP based on real-time scoring
• B) Changing a patient's prescribed pressure from 10 cm
to 14 cm without an order
• C) Diagnosing moderate obstructive sleep apnea
POLYSOMNOGRAPHIC TECHNOLOGIST
(PSG) ACTUAL EXAM 2026/2027 COMPLETE
ACCURATE EXAM REAL QUESTIONS WITH
WELL ELABORATED ANSWERS. (100%
CORRECT VERIFIED SOLUTIONS)
1. A 45-year-old patient is scheduled for a baseline
polysomnogram. According to the AASM manual, what is
the correct location for the F4 electrode?
• A) 10% of the nasion-inion distance above the nasion,
20% of the interaural distance right of midline
• B) 30% of the nasion-inion distance above the nasion,
10% of the interaural distance right of midline
,Page 2 of 228
• C) 20% of the nasion-inion distance above the inion, 20%
of the interaural distance left of midline
• D) 10% of the nasion-inion distance above the inion, 30%
of the interaural distance right of midline
Correct Answer: A
Rationale: The 10-20 system places F4 at 10% above the
nasion (along the nasion-inion line) and 20% to the right of
midline (interaural distance). F4 is a right frontal electrode.
Options B, C, and D describe Fz, O2, or incorrect placements.
2. A patient with a known seizure disorder presents for a
split-night PSG. Which additional electrode montage must
be added to extend the study to a full EEG?
• A) The entire 10-20 system with a minimum of 25
electrodes
• B) A reduced montage including F3, F4, C3, C4, O1, O2,
T3, T4
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• C) Bilateral ear leads only (A1, A2) with a ground
• D) Nasopharyngeal leads only
Correct Answer: B
Rationale: For suspected nocturnal seizures, the AASM
recommends an expanded EEG montage (minimum 8 channels:
F3, F4, C3, C4, O1, O2, T3, T4) referenced to mastoids. Full
10-20 (25 electrodes) is excessive for routine PSG.
Nasopharyngeal leads are invasive and rarely used.
3. (Scenario) A 220 lb patient with a thick neck and beard
arrives for a CPAP titration study. After attempting three
different nasal masks, the leak is >40 L/min. What is the
MOST appropriate next step according to NYS practice
standards?
• A) Cancel the study and reschedule for a home sleep test
• B) Switch to a full-face mask and perform a leak check at
15 cm H2O
, Page 4 of 228
• C) Increase CPAP pressure to 20 cm H2O to force a seal
• D) Apply tape over the patient's mouth and continue with
nasal mask
Correct Answer: B
Rationale: A full-face mask bypasses nasal/oral leakage.
NYS protocols require leak <24 L/min for diagnostic accuracy.
Option A denies necessary care. Option C increases discomfort
without solving leak. Option D is unsafe (aspiration risk).
4. According to New York State Education Law, which of the
following tasks can a Polysomnographic Technologist
perform INDEPENDENTLY without a physician on-site?
• A) Titrating CPAP based on real-time scoring
• B) Changing a patient's prescribed pressure from 10 cm
to 14 cm without an order
• C) Diagnosing moderate obstructive sleep apnea
