RPSGT Best Practices & Methodologies 2

Question 1

What is the maximum acceptable electrode impedance for EEG channels in polysomnography according to AASM guidelines?

Accepted Answer

5 kΩ

Answer

AASM guidelines specify that EEG electrode impedance should be ≤5 kΩ to ensure adequate signal quality.

Question 2

During biocalibrations, a technologist asks the patient to breathe normally for 30 seconds. What is the primary purpose of this step?

Accepted Answer

Verify respiratory channel function and waveform morphology

Answer

Normal breathing during biocalibrations verifies that airflow, thoracic, and abdominal respiratory channels display appropriate waveform morphology and function.

Question 3

For the left outer canthus EOG electrode (E1), what is the correct placement according to AASM specifications?

Accepted Answer

1 cm below and 1 cm lateral to the outer canthus

Answer

E1 is placed 1 cm below and 1 cm lateral to the left outer canthus to capture vertical and horizontal eye movements.

Question 4

What high-frequency filter setting is recommended for EEG channels in polysomnography?

Accepted Answer

35 Hz

Answer

A high-frequency filter (low-pass) of 35 Hz is recommended for EEG channels to preserve physiologically relevant brain wave activity while reducing high-frequency artifact.

Question 5

A technologist notices 60 Hz artifact on multiple EEG channels. Which action should be performed FIRST?

Accepted Answer

Identify and re-prep electrodes with high impedance readings

Answer

High electrode impedance is the most common cause of 60 Hz (electrical interference) artifact; correcting impedance at affected electrodes should be the first step.

RPSGT Exam Practice Test

RPSGT Exam Practice Test

RPSGT Best Practices & Methodologies 2