RPSGT Exam Pediatric Sleep Study Scoring

Question 1

According to AASM guidelines, how is an obstructive apnea defined in a pediatric patient, as opposed to the adult definition?

Accepted Answer

A cessation of airflow lasting ≥ 2 missed breaths with continued respiratory effort

Answer

In pediatric scoring, an obstructive apnea is defined as cessation of oronasal airflow for a duration of at least 2 missed breath cycles, with continued chest and abdominal respiratory effort. This differs from the adult definition (≥10 seconds), because children breathe faster and a 10-second pause may encompass many respiratory cycles.

Question 2

In infants, what is the term for the sleep state that is the developmental equivalent of REM sleep, characterized by irregular breathing, eye movements, and low muscle tone?

Accepted Answer

Active sleep

Answer

In neonates and young infants, sleep is classified as active sleep (equivalent to adult REM), quiet sleep (equivalent to adult NREM), and indeterminate/transitional sleep. Active sleep is characterized by irregular breathing, rapid eye movements, occasional body movements, and low chin EMG tone — mirroring REM sleep features.

Question 3

The diagnostic threshold for obstructive sleep apnea in children differs from adults. What AHI value is considered abnormal in a pediatric patient?

Accepted Answer

AHI ≥ 1 event/hour

Answer

AASM guidelines define pediatric OSA as an AHI ≥ 1 obstructive event per hour of sleep, compared to the adult threshold of ≥ 5 events/hour. Children normally have very few respiratory events, so even one obstructive apnea or hypopnea per hour is considered clinically significant and requires evaluation.

Question 4

Periodic breathing in a pediatric PSG is considered clinically significant when it accounts for more than what percentage of total sleep time?

Accepted Answer

5%

Answer

AASM pediatric scoring defines periodic breathing as ≥3 sequences of central apnea lasting >3 seconds each, separated by ≤20 seconds of normal breathing. It becomes clinically significant when it occupies more than 5% of total sleep time, at which point it is associated with pathological central respiratory control instability.

Question 5

When scoring respiratory events in infants younger than 1 year, which type of apnea is considered a normal physiological finding?

Accepted Answer

Central apnea lasting ≤ 20 seconds without associated desaturation or bradycardia

Answer

Brief central apneas (≤20 seconds) without associated oxygen desaturation or bradycardia are physiologically normal in infants, reflecting immature respiratory control. They become pathological when they exceed 20 seconds in duration or are accompanied by oxygen desaturation or significant bradycardia, which may indicate apnea of prematurity or other disorders.

RPSGT Exam Practice Test

RPSGT Exam Practice Test

RPSGT Exam Pediatric Sleep Study Scoring