RPSGT Data Analysis & Reporting 3

Question 1

In the final PSG report, Total Sleep Time (TST) is calculated as:

Accepted Answer

Total recording time minus all wake periods

Answer

TST equals total recording time minus all wake epochs (including pre-sleep wake, WASO, and wake after final awakening).

Question 2

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

Accepted Answer

Score as mixed apnea

Answer

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

Question 3

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

Accepted Answer

Phasic REM muscle activity

Answer

Short, irregular chin EMG bursts (0.1–0.5 sec) during REM are classified as phasic REM muscle activity per AASM scoring rules.

Question 4

Sleep efficiency is best defined as:

Accepted Answer

TST divided by time in bed × 100

Answer

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

Question 5

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

Accepted Answer

Sustained chin EMG elevation throughout REM epochs

Answer

RBD is characterized by loss of normal REM atonia — sustained or repeated chin EMG elevation during REM epochs is the key PSG marker.

RPSGT Exam Practice Test