EXAM 2 Reading (N.Ch19) Flashcards
Which of the following drugs would be most likely to affect the latency and amplitude of brainstem auditory evoked potentials (BAEPs)?
Sevoflurane
BAEPs are not significantly affected by
benzodiazepines, ketamine, propofol, muscle relaxants, N2O, or barbiturate
Inhalation agents can affect_____and the effect is_______
BAEPs and the effect is proportional to the dose administered.
Which of the following would have the greatest effect on brainstem auditory evoked potentials?
Sevoflurane
Motor evoked potentials using magnetic stimulation are contraindicated in patients who have ?
Pacemaker
Previous Craniotomy
SPinal/Bladder stimulator
Metallic FB
Which evoked potential monitoring modality is specific to cranial nerve VIII and is particularly useful in acoustic neuroma surgery?
Brain auditory evoked potential
Brain auditory evoked potentials evaluate the function of
cranial nerve VIII
Useful in acoustic neuroma surgery.
Brain auditory evoked potentials
Which of the following agents are least likely to alter the latency or amplitude of somatosensory evoked potentials? (select two)
Ketamine
Etomidate
Most anesthetic agents will alter the latency or amplitude of somatosensory evoked potentials except for
opioids, ketamine, and etomidate.
Which electroencephalogram (EEG) findings would be consistent with light anesthesia or profound surgical stimulation?
High frequency, low voltage activity
Surgical stimulation or light anesthesia would display
high frequency, low voltage activity on the EEG monitor.
HFLV
Which of the following agents will not produce a significant change in the latency or amplitude of somatosensory evoked potentials? (select two)
Fentanyl
Ketamine
In normal doses, ketamine, etomidate, and opioids
do not produce a significant change in the latency or amplitude of somatosensory evoked potentials
The administration of intravenous anesthetics in general anesthetic (not pain control) doses
the latency and amplitude of SSEPs will be affected, but not to the degree seen with inhaled anesthetics.
The administration of muscle relaxants will not affect
somatosensory evoked potentials
The administration of muscle relaxants interfere with
or completely block motor-evoked potentials.
Inhaled anesthetics will DAIL
the latency and decrease the amplitude of somatosensory evoked potentials.
When should the auditory transducer be placed when monitoring brainstem auditory evoked potentials?
After positioning of the head
The BAEP transducer should be positioned after the head is positioned. This produces the best results, and also prevents
abrasive injury to the ear canal.
Which evoked potential is useful in evaluating descending motor pathways?
Motor evoked potentials