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CNIM Intraoperative Questions And Answers With Verified Solutions Already Passed!!! Latest Updated 2024
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CNIM Intraoperative Questions And Answers With Verified Solutions Already Passed!!! Latest Updated 2024

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  • August 20, 2024
  • 33
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cnim intraoperative questions and answers with ver
  • for preoperative posterior tibial sseps which of
  • if nasion to inion measures 40 cm the distance be
  • to avoid a false positive the baseline is best ta

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CNIM Intraoperative Questions And
Answers With Verified Solutions Already
Passed!!! Latest Updated 2024
For preoperative posterior tibial SSEPs, which of the following would be the best
ipsilateral location for the ground electrode? - ANSWER✔✔ Calf


If nasion to inion measures 40 cm, the distance between Fpz and Cz is what? -
ANSWER✔✔ 16 cm


To avoid a false positive, the baseline is best taken - ANSWER✔✔ pre-incision.


During a discussion with the anesthesiologist prior to starting IONM on a spinal
correction surgery, you are informed the MDA plans to use volatile anesthetics.
Rank the volatile anesthetic agents per their MAC values (highest to lowest). -
ANSWER✔✔ Desflurane > Sevoflurane > Isoflurane


According to ACNS guidelines, baseline data should be established: - ANSWER✔✔
Following positioning, but prior to surgical manipulation of nervous system


Nitrous Oxide - ANSWER✔✔ Decreases waveform amplitude and increases the
latency of cortical responses


The highest percentage of EEG changes seen after cross clamping during CEA
happen within ______ of the cross clamp being placed. - ANSWER✔✔ two
minutes

,Which of the following can increase SSEP amplitudes? - ANSWER✔✔ Etomidate


During the monitoring of a selective dorsal rhizotomy, what muscle is critical to
monitor? - ANSWER✔✔ Anal Sphincter


If there is a 60 Hz interference in all channels when recording preoperative
median nerve SSEPs, which of the following electrodes should be adjusted first? -
ANSWER✔✔ Ground electrode


Median nerve peripheral conduction between the brachial plexus and cervical
cord is the time measured from: - ANSWER✔✔ EP-N13


Which structure is at risk during an XLIF procedure? - ANSWER✔✔ Lumbar plexus


In recording electrocochleograms, it is best to stimulate using - ANSWER✔✔
rarefaction or condensation clicks.


Which of the following is most likely to cause electrical interference for evoked
potential waveforms in the operating room? - ANSWER✔✔ Electrocautery


Which of the following would most likely be normal in the lower extremity SSEP of
a patient with a dorsal column lesion? - ANSWER✔✔ Popliteal Fossa Response


1 MAC of Desflurane is equivalent to a concentration of: - ANSWER✔✔ 0.06

,During a median nerve preoperative study, a patient has discomfort at the wrist.
Stimulating electrodes are 10mm gold disk, stimulus intensity is 20 mA, and
stimulus duration is 100 microseconds. Which of the following would most likely
reduce the patients discomfort while maintaining adequate stimulation? -
ANSWER✔✔ Decrease the stimulus intensity to motor threshold


To4 is used to determine which of the following values? - ANSWER✔✔ level of
neuromuscular blockage present


Which of the following is a common complication of microvascular
decompression of cranial nerve VIII? - ANSWER✔✔ Hearing loss


Ischemic injury of the anterior spinal artery will affect which modality first? -
ANSWER✔✔ tcMEPs


Extreme cerebellar retraction during CPA tumor surgery likely results in: -
ANSWER✔✔ Loss of all waves due to vascular compromise


Wave I of the Brainstem Auditory Evoked Potential (BAEP) has a typical post-
stimulus latency of - ANSWER✔✔ 2 ms


According to ACNS Guidelines, what is the recommended placement of the
ground for a cervical procedure? - ANSWER✔✔ Forearm


If the brachial plexus is at risk for compression due to patient positioning, the
technologist, surgeon and neurophysiologist should discuss adding which SSEP
modality to the surgical plan? - ANSWER✔✔ Ulnar Nerve

, Which of the following is most likely an anesthetic change seen in spine cases? -
ANSWER✔✔ Changes in cortical responses in bilateral UE and LE SSEPs


Which BAER click polarity eliminates the cochlear microphonic? - ANSWER✔✔
Alternating


In identification of phase reversal for sensory-motor localization, which response
is pre-central and which is post-central? - ANSWER✔✔ P22, N20


Between which contacts on this 2 x 4 grid is a phase reversal apparent? -
ANSWER✔✔ Between contacts G3 and G4.


Which of the following is a critical surgical event? - ANSWER✔✔ Resecting of
tumor fragments during acoustic neuroma resection


What is the response indicated by the line marked "X"? - ANSWER✔✔ P31


When deciding between an 8ft and 20ft connector cable for a 32-channel system,
why is the 8ft cable preferred? - ANSWER✔✔ Decreased electrical interference


Depolarizing agent: - ANSWER✔✔ Succinylcholine


Which of the following improves the signal-to-noise ratio by the square root of
the number of responses added? - ANSWER✔✔ Signal averaging

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