Certified Polysomnographic Technician Certification Certified Polysomnographic Technician Certification Sleep Scoring & Staging 2

Question 1

What does an Apnea-Hypopnea Index (AHI) of 15–30 events per hour classify as?

Accepted Answer

Moderate OSA

Answer

An AHI of 15–30 events/hour is classified as moderate obstructive sleep apnea per AASM severity criteria.

Question 2

Which EEG electrode placement corresponds to the left central region per the 10-20 system?

Accepted Answer

C3

Answer

C3 is the left central electrode in the 10-20 system and is a primary derivation for sleep stage scoring.

Question 3

A leg movement scored during PSG must last at least how long to be counted?

Accepted Answer

0.5 seconds

Answer

AASM criteria require a leg movement duration of 0.5 to 10 seconds to be scored as a periodic limb movement.

Question 4

What is the AASM recommended minimum sampling rate for EEG channels in a digital PSG system?

Accepted Answer

256 Hz

Answer

AASM recommends a minimum sampling rate of 256 Hz for EEG channels to accurately capture sleep-related waveforms.

Question 5

During NREM sleep, which waveform appears as a high-amplitude biphasic waveform and can occur spontaneously or in response to stimuli?

Accepted Answer

K-complex

Answer

K-complexes are high-amplitude biphasic waveforms with a negative sharp deflection followed by a positive component, seen in N2 sleep.

Certified Polysomnographic Technician Certification Practice Test