Certified Polysomnographic Technician Certification Certified Polysomnographic Technician Certification Equipment Setup & Calibration 2

Question 1

What is the standard high-frequency filter (low-pass filter) setting for chin EMG channels in PSG?

Accepted Answer

70 Hz

Answer

The standard high-frequency filter for chin EMG in PSG is 70 Hz, which removes high-frequency noise while preserving the EMG signal.

Question 2

The reference electrode for EEG derivations in PSG is typically placed at which location?

Accepted Answer

Mastoid process (A1 or A2)

Answer

The mastoid processes (A1 for left, A2 for right) are the standard reference electrode sites for EEG derivations in PSG recording.

Question 3

Which respiratory effort monitoring device measures thoracic and abdominal movement using inductive plethysmography?

Accepted Answer

Respiratory inductance plethysmography (RIP) belt

Answer

Respiratory inductance plethysmography (RIP) belts measure cross-sectional area changes of the thorax and abdomen to assess respiratory effort.

Question 4

During CPAP titration, what does a technologist do when the patient continues to have obstructive apneas at the current pressure?

Accepted Answer

Increase pressure by 1–2 cm H₂O

Answer

When persistent obstructive apneas occur during CPAP titration, the technologist increases pressure by 1–2 cm H₂O per AASM titration protocols.

Question 5

What is the purpose of the body position sensor in a PSG recording?

Accepted Answer

To document position-dependent respiratory events (e.g., supine vs. non-supine)

Answer

The body position sensor tracks patient position throughout the night to correlate respiratory events and sleep quality with body position, identifying positional OSA.

Certified Polysomnographic Technician Certification Practice Test

Certified Polysomnographic Technician Certification Practice Test

Certified Polysomnographic Technician Certification Certified Polysomnographic Technician Certification Equipment Setup & Calibration 2