CNIM Guidelines - Practice Questions and Correct Correct Answerwers Latest Version 2023 A global significant decrease in amplitude of cortical SSEPs w/o significant decrease in amplitude of cervical and subcortical responses in a lumbar spine surgery is most
possibly due to:
a) Inadequate stimulation
b) Changes in anesthesia regimen
c) Significant blood loss due to surgery
d) Damages caused by the surgery - Correct Answer B
A loss of SSEP response would most likely occur _____ to the surgical site
a) Rostral
b) Caudal
c) Anterior
d) Posterior - Correct Answer B
After-discharges occur after what?
a) Seizure
b) TrCorrect Answercranial motor stimulation
c) Direct cortical stimulation
d) Phase reversal - Correct Answer C
An agent that should be avoided immediately before EMG for facial nerve monitoring is:
a) N20
b) Vecuronium
c) Phenytoin
d) Isoflurane - Correct Answer B
Determining sensory from motor cortex can be accomplished when the:
a) SEP increases in latency
b) SEP decreases in amplitude
c) SEP shows a wave phase reversal
d) ABR increases in latency - Correct Answer C
Epiliptiform discharges in a bipolar linked chain are localized by:
a) A phase reversal b/w two channels
b) A mu rhythm
c) Patient movement
d) A referential montage - Correct Answer A
Evoked potential systems must be calibrated a MINIMUM of once every:
a) Six months
b) One year
c) Two years
d) Periodically as needed - Correct Answer A 1 / 2
For spontaneous EMG monitoring, which is the most appropriate drug to use at induction?
a) Curare
b) Paculon
c) Succinyl-choline
d) Norcuron - Correct Answer C
Given these results on a MN SSEP test you should:
a) Evaluate patient alertness
b) Check electrode impedance
c) Test leakage current
d) Retest at high stimulus intensity - Correct Answer D
Having poor ground resistance represents a safety problem b/c:
a) No, it really is not a safety issue
b) Any current leaking to the chassis may find a path to ground through your body
c) The machine might not function properly
d) It may affect other electrical equipment that have connections to Earth ground -
Correct Answer B
How frequently should the evoked potential machines be calibrated and safety tested?
a) Only when there is a problem
b) Every 6 months
c) Once a year
d) Once every two years - Correct Answer B
Intraoperative baseline recordings in somatosensory evoked potentials are best
acquired:
a) In a highly alert, awake patient
b) Prior to positioning
c) Prior to anesthetic induction
d) In the positioned, induced patient - Correct Answer D
TceMEP monitoring during scoliosis surgery may replace a need for the:
a) The O'Hara clonus test
b) The Stagnara wake up test
c) The Ruben hematocrit test
d) Neurologic exam - Correct Answer B
The criteria for which intraoperative response should be considered significantly
changed should be based on:
a) Normative data
b) Pre-anesthetic data
c) An absolute reference based on the patient's height
d) The patient's individual baseline responses - Correct Answer D
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