EEG Ambulatory 3

Question 1

What is a significant limitation of ambulatory EEG compared to inpatient video-EEG monitoring?

Accepted Answer

Many ambulatory systems lack time-synchronized video, making behavioral correlation difficult

Answer

A major limitation of ambulatory EEG is the frequent absence or limited quality of time-synchronized video, making it difficult to correlate EEG findings with the patient's clinical behavior during events.

Question 2

Which clinical scenario is MOST appropriate for ordering an ambulatory EEG?

Accepted Answer

A patient with frequent weekly events that have not been captured on routine EEG

Answer

Ambulatory EEG is ideal for patients with frequent events (weekly or more) that have not been captured on routine EEG, as the extended recording duration significantly increases the likelihood of recording a clinical event.

Question 3

Impedance checks during ambulatory EEG should be performed:

Accepted Answer

At hookup and at each follow-up visit or when the recording device is checked

Answer

Impedances should be checked at initial hookup and at scheduled follow-up visits (typically daily for multi-day recordings) to identify and correct electrode degradation before it compromises recording quality.

Question 4

How does an ambulatory EEG system handle data storage for a 72-hour recording?

Accepted Answer

Data is stored on a compact flash card, SD card, or internal memory in the portable recording device

Answer

Modern ambulatory EEG systems store data digitally on flash memory cards (CF, SD) or internal solid-state memory within the portable recording unit, with sufficient capacity for continuous multi-day recordings at full sampling rates.

Question 5

Sleep staging during ambulatory EEG is important because:

Accepted Answer

Sleep architecture documentation helps identify state-dependent abnormalities and certain disorders like parasomnias

Answer

Sleep staging in ambulatory EEG documents sleep architecture and identifies state-dependent patterns: epileptiform discharges activated by specific sleep stages, sleep disorders, and abnormalities that differ between wake and sleep states.

EEG - Electroencephalography Practice Test

EEG - Electroencephalography Practice Test

EEG Ambulatory 3