RPSGT Data Analysis & Reporting 2

Question 1

Which AASM-defined arousal criterion requires a minimum duration of EEG frequency shift?

Accepted Answer

3 seconds

Answer

AASM rules require an EEG frequency shift lasting at least 3 seconds to qualify as an arousal.

Question 2

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

Accepted Answer

Hypopnea

Answer

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

Question 3

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

Accepted Answer

0.3 Hz

Answer

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

Question 4

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

Accepted Answer

Moderate OSA

Answer

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

Question 5

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

Accepted Answer

2 hours

Answer

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

RPSGT Exam Practice Test