NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
What is the minimum and preferred sampling rate?
Min 200Hz; Preferred 500Hz
Which respiratory equipment is used to measure apneas?
Thermistor/thermocouple
What are some common troubleshooting issues for the
thermistor?
Warm the room, remove fan, moisture on the sensor, battery
needs to be changed
What is considered the gold standard for measuring
respiratory effort?
RIP belts
What equipment is used to measure RERAs and Hypopneas?
nasal pressure transducer (PTAF)
, NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
Infants: if 2 or more psg characteristics are discordant for
stage R or N, score the stage as
Transitional
EEG characteristic generally only seen in stage N,
characterized by at least 3 alternating runs of bilaterally
symmetrical synchronous high voltage bursts of 1-3Hz delta
activity lasting 5-6 seconds
trace alternate
continuous low voltage mixed frequency EEG with delta
waves and predominately theta activity
low voltage irregular
continuous synchronous symmetrical EEG activity,
predominately high voltage 1-3Hz delta activity
high voltage slow
Infants: 4+ of the following are present:
~eyes closed with no eye movements
, NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
~chin EMG present
~regular respiration
~Trace alternate, High voltage slow, or spindles
~reduced movement compared to wake
NREM
Infants: 4+ present:
~low chin tone
~eyes closed with at least one REM
~irregular respiration
~mouthing, sucking, twitches, or brief head movements
~EEG continuous pattern without spindles
REM
Infants: If an epoch contains multiple REM & NREM
characteristics
Score as transitional
TST
, NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
sum of all stages, minus wake; dont forget to convert epochs
to minutes!!
Testing time from lights out to lights on
TRT or TIB
Sleep efficiency
TST/TIB
Normal sleep efficiency
80-94%
decreased sleep efficiency
<80% insomnia
increased sleep efficiency
>95% seen in narcolepsy and idiopathic hypersomnia
WITH ANSWERS
What is the minimum and preferred sampling rate?
Min 200Hz; Preferred 500Hz
Which respiratory equipment is used to measure apneas?
Thermistor/thermocouple
What are some common troubleshooting issues for the
thermistor?
Warm the room, remove fan, moisture on the sensor, battery
needs to be changed
What is considered the gold standard for measuring
respiratory effort?
RIP belts
What equipment is used to measure RERAs and Hypopneas?
nasal pressure transducer (PTAF)
, NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
Infants: if 2 or more psg characteristics are discordant for
stage R or N, score the stage as
Transitional
EEG characteristic generally only seen in stage N,
characterized by at least 3 alternating runs of bilaterally
symmetrical synchronous high voltage bursts of 1-3Hz delta
activity lasting 5-6 seconds
trace alternate
continuous low voltage mixed frequency EEG with delta
waves and predominately theta activity
low voltage irregular
continuous synchronous symmetrical EEG activity,
predominately high voltage 1-3Hz delta activity
high voltage slow
Infants: 4+ of the following are present:
~eyes closed with no eye movements
, NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
~chin EMG present
~regular respiration
~Trace alternate, High voltage slow, or spindles
~reduced movement compared to wake
NREM
Infants: 4+ present:
~low chin tone
~eyes closed with at least one REM
~irregular respiration
~mouthing, sucking, twitches, or brief head movements
~EEG continuous pattern without spindles
REM
Infants: If an epoch contains multiple REM & NREM
characteristics
Score as transitional
TST
, NBRC SDS EXAM (ACTUAL 2025) QUESTIONS
WITH ANSWERS
sum of all stages, minus wake; dont forget to convert epochs
to minutes!!
Testing time from lights out to lights on
TRT or TIB
Sleep efficiency
TST/TIB
Normal sleep efficiency
80-94%
decreased sleep efficiency
<80% insomnia
increased sleep efficiency
>95% seen in narcolepsy and idiopathic hypersomnia
