Exam (elaborations)
CNIM -EEG TEST QUESTIONS AND ANSWERS
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CNIM -EEG TEST QUESTIONS ANDANSWERS
What can cause EEG burst suppression?
Isoflurane: 1.7%
During carotid endarterectomy, 80% of patients have clamp-related alterations
within the first 60 seconds.
Spectral analysis of raw EEG data shows power as an upward deflection and
frequency as a linear display along the epoch line.
If a patient's absence of collateral blood supply during a CEA is not rectified
within 10 minutes, they may experience postoperative deficits.
What causes burst suppression on EEG?
Barbiturates
The majority of strokes linked with carotid endarterectomy occur...
After the cross-clamp is freed.
What is the most typical alteration observed during cross-clamping during a left
carotid endarterectomy?
The median nerve's amplitude decreases u
nilaterally.
What sort of EEG wave can be identified by its frequen
cy of 5 Hz?
Theta Activity
, Delta waves are less than 4 Hz.
High amplitude waves
Adult Slow-wave Sleep
Theta: 4-7 Hz
Alpha: 8-15 Hz
Relaxed
Beta: 16-31 Hz
Active thinking.
Gamma
Greater than 32 Hz.
Normal EEG activity in alert adults...
Primarily alpha and beta activities.
Epileptiform discharges in a bipolar linked chain are characterized by...
A phase reversal between two channels.
EEG is thought to originate from Layer III pyramidal cells in the cerebrum.
EEG monitoring during a carotid endarterectomy can reveal...
Hypotension
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